WO2018169019A1 - 微粒子ハイドロタルサイト、その製造方法、その樹脂組成物、及びその懸濁液 - Google Patents
微粒子ハイドロタルサイト、その製造方法、その樹脂組成物、及びその懸濁液 Download PDFInfo
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- WO2018169019A1 WO2018169019A1 PCT/JP2018/010338 JP2018010338W WO2018169019A1 WO 2018169019 A1 WO2018169019 A1 WO 2018169019A1 JP 2018010338 W JP2018010338 W JP 2018010338W WO 2018169019 A1 WO2018169019 A1 WO 2018169019A1
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- Prior art keywords
- hydrotalcite
- suspension
- primary particles
- water
- average
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- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 title claims abstract description 148
- 229960001545 hydrotalcite Drugs 0.000 title claims abstract description 148
- 229910001701 hydrotalcite Inorganic materials 0.000 title claims abstract description 148
- 239000000725 suspension Substances 0.000 title claims abstract description 101
- 239000011342 resin composition Substances 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 9
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- 239000011163 secondary particle Substances 0.000 claims abstract description 70
- 229910052751 metal Inorganic materials 0.000 claims abstract description 68
- 239000002184 metal Substances 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 44
- 150000001450 anions Chemical class 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000002441 X-ray diffraction Methods 0.000 claims abstract description 8
- 238000002296 dynamic light scattering Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 61
- 238000006243 chemical reaction Methods 0.000 claims description 51
- 229920005989 resin Polymers 0.000 claims description 43
- 239000011347 resin Substances 0.000 claims description 43
- 150000003839 salts Chemical class 0.000 claims description 34
- 239000007864 aqueous solution Substances 0.000 claims description 32
- -1 phosphate ester Chemical class 0.000 claims description 25
- 239000002994 raw material Substances 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 12
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- 150000007524 organic acids Chemical class 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 239000003960 organic solvent Substances 0.000 claims description 9
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- CYDQOEWLBCCFJZ-UHFFFAOYSA-N 4-(4-fluorophenyl)oxane-4-carboxylic acid Chemical compound C=1C=C(F)C=CC=1C1(C(=O)O)CCOCC1 CYDQOEWLBCCFJZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
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- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 235000011054 acetic acid Nutrition 0.000 claims description 3
- 239000003945 anionic surfactant Substances 0.000 claims description 3
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- 239000001632 sodium acetate Substances 0.000 claims description 3
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- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 2
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- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 6
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- 239000005642 Oleic acid Substances 0.000 description 6
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 6
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- 239000011777 magnesium Substances 0.000 description 6
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 6
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/006—Compounds containing zinc, with or without oxygen or hydrogen, and containing two or more other elements
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/78—Compounds containing aluminium, with or without oxygen or hydrogen, and containing two or more other elements
- C01F7/784—Layered double hydroxide, e.g. comprising nitrate, sulfate or carbonate ions as intercalating anions
- C01F7/785—Hydrotalcite
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/04—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing halogen atoms
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- C01P2002/00—Crystal-structural characteristics
- C01P2002/20—Two-dimensional structures
- C01P2002/22—Two-dimensional structures layered hydroxide-type, e.g. of the hydrotalcite-type
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- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
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- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K3/26—Carbonates; Bicarbonates
- C08K2003/267—Magnesium carbonate
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Definitions
- the present invention relates to a hydrotalcite having an X-ray diffraction structure different from that of conventional hydrotalcite and having a small average lateral width of primary particles and little aggregation between primary particles, a method for producing the hydrotalcite, and a resin composition thereof And its suspension.
- Hydrotalcite can be synthesized by coprecipitation method.
- the primary particles of hydrotalcite obtained by the coprecipitation method are fine crystals having an average width of several tens of nanometers, but these primary particles are strongly aggregated, and the secondary particles are as large as several ⁇ m to several tens of ⁇ m. There was a problem that.
- Example 2 Furthermore, the suspension immediately after the reaction of Example 2 was dehydrated and vacuum-dried to obtain a powder having an average secondary particle diameter of 4.5 ⁇ m and a BET specific surface area of 3.5 m 2 / g. The SEM observation confirmed the aggregation of primary particles.
- Example 2 when the suspension immediately after the reaction of Example 1 was dehydrated and vacuum-dried, the average secondary particle diameter of the obtained powder was 3.8 ⁇ m, and the BET specific surface area was 4.2 m 2 / As a result, the aggregation of primary particles was confirmed by SEM observation.
- Patent Document 3 hydrotalcite with lactic acid inserted between layers is synthesized, and the hydrotalcite is washed with water, suspended in water, aged, and delaminated to obtain a colloidal hydrotalcite dispersion. It is said that In Example 1, magnesium lactate, aluminum lactate, lactic acid, and caustic soda were used as raw materials, and the reaction product obtained by precipitation was washed with water, suspended in water, and allowed to stand for several days. It is said that a translucent colloidal solution is obtained as a dispersoid.
- the reason for using lactic acid for the reaction is to delaminate the hydrotalcite, which is different from the improvement in primary particle dispersibility and the atomization, which are the purposes of the present application.
- Example 1 When Example 1 was further tested and the resulting colloidal solution was dehydrated and the powder after drying was analyzed, aggregation of primary particles was confirmed by SEM observation. Furthermore, Patent Document 3 does not mention hydrotalcite particle size, crystal distortion, dispersibility, and suspension stability, and does not satisfy the requirements of hydrotalcite for which protection is sought in the present application.
- hydrotalcite When hydrotalcite is used as a suspension, it has been demanded that the primary particles do not aggregate even when stored for a long period of time and do not cause sedimentation and have suspension stability. Furthermore, when hydrotalcite is used as a powder, there is no aggregation between primary particles, and a material close to monodispersion has been demanded. However, the conventional method has not provided hydrotalcite that satisfies these problems.
- the problem of the present invention is a problem of the prior art that occurs when the primary particle size of hydrotalcite is reduced, (1) the primary particles aggregate when stored as a suspension for a long time, and (2) Overcoming the aggregation of primary particles when the suspension is dehydrated and dried to form a powder.
- the hydrotalcite with a small primary particle diameter produced by the conventional method has a large lattice strain, and the lattice strain in the ⁇ 003> direction in the X-ray diffraction method is at least 4 ⁇ 10 ⁇ 3 . If the lattice strain is large, primary particles tend to aggregate when stored as a suspension for a long time or when powdered. Therefore, the present inventors have discovered that hydrotalcite having a small primary particle size and a small crystal strain can be produced by reacting under specific conditions and further aging, and have reached the present invention.
- the present invention provides a hydrotalcite represented by the following formula (1) satisfying the following (A) to (C), which overcomes the above problems.
- M 2+ is a divalent metal of at least one or more
- M 3+ is at least one kind of trivalent metal
- n is an integer of 1-6, respectively
- x And m are in the range of 0.17 ⁇ x ⁇ 0.36 and 0 ⁇ m ⁇ 10, respectively.
- (A) The lattice strain in the ⁇ 003> direction by X-ray diffraction is 3 ⁇ 10 ⁇ 3 or less; (B) The average horizontal width of primary particles by SEM method is 5 nm or more and 200 nm or less; (C) Monodispersity represented by the following formula is 50% or more. Monodispersity (%) (Average width of primary particles by SEM method / Average width of secondary particles by dynamic light scattering method) ⁇ 100
- the method for producing hydrotalcite of the present invention includes the following four steps.
- a raw material preparation step for preparing a water-soluble composite metal salt aqueous solution and an alkali metal hydroxide aqueous solution contains a divalent metal salt, a trivalent metal salt, and a monovalent organic acid and / or an organic acid salt that forms a complex with the trivalent metal.
- a water-soluble complex metal salt aqueous solution prepared in (1) and an alkali metal hydroxide aqueous solution are continuously reacted at a reaction temperature of 0 to 60 ° C. and a reaction pH of 8.5 to 11.5, and a suspension containing hydrotalcite is contained. Reaction process to obtain a turbid liquid.
- a washing step in which the suspension containing the hydrotalcite obtained in (2) is dehydrated, washed with water, and suspended in water and / or an organic solvent.
- a monovalent organic acid and / or an organic acid salt that forms a complex with a trivalent metal during the reaction is added as a complexing agent to increase the precipitation pH as a hydroxide of the trivalent metal and approach the precipitation pH of the divalent metal.
- the complexing agent also has an effect of suppressing crystal growth of the primary particles of hydrotalcite during the reaction due to the steric hindrance effect of the molecule.
- the dispersibility of the primary particles can be further improved by maintaining the suspension containing hydrotalcite after the reaction and water washing at 0 to 100 ° C. for 1 to 60 hours with stirring.
- the hydrotalcite of the present invention can be used in various applications such as a heat stabilizer for vinyl chloride resin, a neutralizing agent for polyolefin polymerization catalyst residues, an acid acceptor for halogen-containing rubber, and a heat retaining agent for agricultural films.
- a suspension containing hydrotalcite can be suitably used as a liquid antacid or heat stabilizer. Since the hydrotalcite of the present invention has greatly improved anion exchange capacity than before, the same blending amount exhibits an effect as a stabilizer, neutralizer, and acid acceptor superior to those of the prior art, The same performance as before can be achieved with a small amount. Moreover, when mix
- FIG. 4 is a SEM photograph of 100,000 times the hydrotalcite of Sample 4 of Example 4.
- 10 is a 10,000 times SEM photograph of hydrotalcite of Sample 15 of Comparative Example 2.
- 4 is a SEM photograph of 100,000 times the hydrotalcite of Sample 15 of Comparative Example 2.
- 10 is a 10,000 times SEM photograph of hydrotalcite of Sample 19 in Comparative Example 6.
- 4 is a SEM photograph of 100,000 times the hydrotalcite of Sample 19 of Comparative Example 6.
- ⁇ Hydrotalcite> Chemical formula, metal type, x range (abundance ratio of divalent metal and trivalent metal), m range, type of interlayer anion, lattice strain in ⁇ 003> direction, primary particle of hydrotalcite of the present invention
- the average lateral width, monodispersity, BET specific surface area and surface treatment are as follows.
- the hydrotalcite of the present invention is represented by the following formula (1).
- M 2+ is a divalent metal of at least one or more, M 3+ is at least one kind of trivalent metal, A n-represents n-valent anion, n is an integer of 1-6, respectively, x And m are in the range of 0.17 ⁇ x ⁇ 0.36 and 0 ⁇ m ⁇ 10, respectively.
- M 2+ is at least one divalent metal and M 3+ is at least one trivalent metal.
- a preferred divalent metal is at least one selected from the group consisting of Mg and Zn, and a preferred trivalent metal is Al. This is because the safety to the living body is high, the particles are white, and the usage is wide.
- the range of x is 0.17 ⁇ x ⁇ 0.36, and preferably 0.19 ⁇ x ⁇ 0.34.
- x exceeds 0.36, boehmite is produced as a by-product, and conversely, when it is smaller than 0.17, magnesium hydroxide is produced as a by-product, both of which cause a decrease in transparency when blended in a resin.
- Hydrotalcite causes crystal water to desorb at around 180-230 ° C as the temperature rises. Therefore, in the use of blending hydrotalcite with a synthetic resin, it is preferable that the range of m is 0 ⁇ m ⁇ 0.05 when the processing temperature for kneading or crosslinking is 200 ° C. or higher. This is because if m is within this range, problems such as resin foaming and silver streak due to crystallization water desorption can be prevented.
- a n ⁇ represents an n-valent anion
- n represents an integer of 1 to 6
- preferable A n ⁇ is selected from CO 3 2 ⁇ and ClO 4 ⁇ . More than a seed.
- the lattice strain in the ⁇ 003> direction in the X-ray diffraction method is 3 ⁇ 10 ⁇ 3 or less, preferably 2.5 ⁇ 10 ⁇ 3 or less, more preferably 2 ⁇ 10 ⁇ 3 or less. It is. If the lattice strain in the ⁇ 003> direction is larger than 3 ⁇ 10 ⁇ 3 , the primary particles tend to aggregate when powdered or when stored for a long time as a suspension.
- FIG. 1 is a schematic diagram for explaining the lateral width (W 1 ) of the primary particles used in the present invention. As shown in FIG. 1, the lateral width W 1 of the primary particles is defined. That is, the major axis of the particle when the primary particle is a hexagonal plate surface is “lateral width W 1 of the primary particle”.
- Secondary particles are particles in which a plurality of primary particles gather to form an aggregate.
- FIG. 2 is a schematic diagram for explaining the secondary particles used in the present invention and the lateral width (W 2 ) of the secondary particles. As shown in FIG. 2, define the width W 2 of the secondary particles. That is, the diameter of the sphere when the secondary particles are considered to be wrapped by the sphere is the “lateral width W 2 of the secondary particles”.
- the average lateral width of primary particles by SEM is 5 nm or more and 200 nm or less, preferably 5 nm or more and 150 nm or less, more preferably 5 nm or more and 100 nm or less, more preferably 5 nm or more and 80 nm or less, and still more preferably. Is from 5 nm to 60 nm, most preferably from 5 nm to 50 nm.
- the average lateral width of the primary particles is obtained from the arithmetic average of the measured lateral widths of any 100 crystals in the SEM photograph by the SEM method.
- the lateral width of primary particles cannot be measured by laser diffraction in principle. Therefore, it confirms visually by SEM method.
- the monodispersity represented by the following formula is 50% or more, preferably 80% or more.
- the lateral width of the secondary particles is measured by a dynamic light scattering method. This is because it is difficult for the SEM method to accurately measure the lateral width of the secondary particles.
- Monodispersity (%) (Average width of primary particles by SEM method / Average width of secondary particles by dynamic light scattering method) ⁇ 100
- the BET specific surface area is 20 to 600 m 2 / g, preferably 30 to 500 m 2 / g, more preferably 40 to 400 m 2 / g.
- the BET specific surface area is less than 20 m 2 / g, the dispersion of primary particles in a powder state is not sufficient.
- it exceeds 600 m 2 / g the bulk of the powder becomes high, and the handling property in the case of kneading with a synthetic resin is deteriorated.
- surface treatment In the hydrotalcite of the present invention, it is desirable to surface-treat the particles in order to improve the dispersibility in the resin.
- Surface treatment agents include anionic surfactants, cationic surfactants, phosphate ester treatment agents, silane coupling agents, titanate coupling agents, aluminum coupling agents, silicone treatment agents, silicic acid and water glass.
- Particularly preferred surface treatment agents are at least one selected from the group consisting of oleic acid, stearic acid, octanoic acid and octylic acid.
- the amount of the surface treatment agent is 0.01 to 20% by weight, preferably 0.1 to 15% by weight, based on the weight of the hydrotalcite.
- the resin composition of the present invention contains 0.1 to 250 parts by weight of the hydrotalcite of the present invention with respect to 100 parts by weight of the resin.
- the blending amount of hydrotalcite is more preferably 1 to 200 parts by weight with respect to 100 parts by weight of resin.
- the resin used in the present invention means a resin and / or rubber, for example, polyvinyl chloride, polyvinyl bromide, polyvinyl fluoride, polyvinylidene chloride, chlorinated polyethylene, chlorinated polypropylene, brominated polyethylene, rubber chloride, Vinyl chloride-vinyl acetate copolymer, vinyl chloride-ethylene copolymer, vinyl chloride-propylene copolymer, vinyl chloride-styrene copolymer, vinyl chloride-isobutylene copolymer, vinyl chloride-vinylidene chloride copolymer, Vinyl chloride-styrene-acrylonitrile copolymer, vinyl chloride-butadiene copolymer, vinyl chloride-chlorinated propylene copolymer, vinyl chloride-vinylidene chloride-vinyl acetate terpolymer, vinyl chloride-maleic acid ester copolymer Polymer, vinyl chloride-methacrylic acid
- polyethylene copolymers of ethylene and other ⁇ -olefins, copolymers of ethylene and vinyl acetate, copolymers of ethylene and acrylic acid ether, copolymers of ethylene and methyl acrylate, polypropylene Copolymers of propylene and other ⁇ -olefins, polybutene-1, poly-4-methylpentene-1, polystyrene, copolymers of styrene and acrylonitrile, copolymers of ethylene and propylene diene rubber, ethylene and Examples thereof include thermoplastic resins such as copolymers with butadiene, polyvinyl acetate, polylactic acid, polyvinyl alcohol, polyacrylate, polymethacrylate, polyurethane, polyester, polyether, polyamide, ABS, polycarbonate, and polyphenylene sulfide.
- thermoplastic resins such as copolymers with butadiene, polyvinyl acetate, polylactic acid, polyvinyl alcohol
- thermosetting resins such as a phenol resin, a melamine resin, an epoxy resin, an unsaturated polyester resin, an alkyd resin
- EPDM, SBR, NBR, butyl rubber, chloroprene rubber, isoprene rubber, chlorosulfonated polyethylene rubber, silicon rubber, fluorine rubber, chlorinated butyl rubber, brominated butyl rubber, epichlorohydrin rubber and the like can be mentioned.
- the resin composition of the present invention includes other additives such as antioxidants, reinforcing agents such as talc, ultraviolet absorbers, lubricants, matting agents such as fine silica, pigments such as carbon black, Flame retardants such as brominated flame retardants and phosphate ester flame retardants can be appropriately selected and blended.
- flame retardant aids such as zinc stannate, alkali metal stannate, carbon powder, and fillers such as calcium carbonate can be appropriately selected and blended.
- the preferred compounding amounts of these additives are 0.01 to 5 parts by weight of antioxidant, 0.1 to 50 parts by weight of reinforcing agent, and 0.01 to 5 parts by weight of UV absorber with respect to 100 parts by weight of the resin.
- This invention includes the molded object which consists of the said resin composition.
- the solvent is water and / or an organic solvent
- the concentration of hydrotalcite is 0.1 to 300 g / L.
- the concentration of hydrotalcite is preferably 0.5 to 250 g / L, more preferably 1 to 200 g / L.
- organic solvent used in the present invention examples include benzene, toluene, xylene, normal hexane, isohexane, normal heptane, cyclohexane, methylcyclohexane, ethylcyclohexane, methanol, ethanol, normal propyl alcohol, isopropyl alcohol, normal butanol, isobutanol, and octanol.
- the method for producing hydrotalcite of the present invention includes the following four steps.
- a raw material preparation step for preparing a water-soluble composite metal salt aqueous solution and an alkali metal hydroxide aqueous solution contains a divalent metal salt, a trivalent metal salt, and a monovalent organic acid and / or an organic acid salt that forms a complex with the trivalent metal.
- a water-soluble complex metal salt aqueous solution prepared in (1) and an alkali metal hydroxide aqueous solution are continuously reacted at a reaction temperature of 0 to 60 ° C. and a reaction pH of 8.5 to 11.5, and a suspension containing hydrotalcite is contained. Reaction process to obtain a turbid liquid.
- a washing step in which the suspension containing the hydrotalcite obtained in (2) is dehydrated, washed with water, and suspended in water and / or an organic solvent.
- the raw material of the hydrotalcite of the present invention is a divalent metal salt, a trivalent metal salt, a monovalent organic acid and / or an organic acid salt that forms a complex with a trivalent metal, and an alkali metal hydroxide salt.
- the divalent metal salt include water-soluble divalent metal salts such as magnesium chloride, magnesium bromide, magnesium nitrate, magnesium acetate, zinc chloride, zinc bromide, zinc nitrate, and zinc acetate. Absent.
- a divalent metal salt containing a monovalent anion is preferably used. Two or more divalent metal salts may be combined.
- magnesium chloride and / or zinc chloride is used.
- the trivalent metal salt include, but are not limited to, water-soluble trivalent metal salts such as aluminum chloride, aluminum bromide, aluminum nitrate, and aluminum acetate.
- a trivalent metal salt containing a monovalent anion is preferably used. Two or more kinds of trivalent metal salts may be combined.
- Aluminum chloride is preferably used.
- the precipitation pH as a hydroxide of a trivalent metal ion is lower than the precipitation pH of a divalent metal. Therefore, even if the pH during the reaction is kept constant by the pH adjuster, trivalent ions are first precipitated as hydroxides. From the difference in precipitation pH between the divalent metal and the trivalent metal, crystal distortion is generated and the hydrotalcite primary particles are aggregated.
- the precipitation pH as a hydroxide of a trivalent metal ion is increased.
- hydrotalcite with less crystal distortion can be obtained.
- the complexing agent also has an effect of suppressing crystal growth of primary particles of hydrotalcite due to the steric hindrance effect of the molecule.
- the monovalent organic acid and / or organic acid salt forming a complex with the trivalent metal include lactic acid, sodium lactate, formic acid, sodium formate, acetic acid, sodium acetate, propionic acid and sodium propionate. This is not the case.
- organic acids and organic acid salts can be combined.
- lactic acid, sodium lactate, acetic acid and sodium acetate are used.
- alkali metal hydroxide salt include, but are not limited to, sodium hydroxide and potassium hydroxide.
- a divalent metal salt, a trivalent metal salt, and a monovalent organic acid and / or an organic acid salt that forms a complex with the trivalent metal are dissolved in an aqueous solvent to prepare a water-soluble composite metal salt aqueous solution.
- the concentration of the divalent metal in the aqueous water-soluble composite metal salt solution is 0.01 to 2 mol / L, preferably 0.1 to 1.5 mol / L.
- the concentration of the trivalent metal is 0.01 to 2 mol / L, preferably 0.1 to 1.5 mol / L.
- the concentration of the alkali metal hydroxide is 0.01 to 4 mol / L, preferably 0.1 to 2 mol / L.
- the ratio of the divalent metal and the trivalent metal is 1.78 ⁇ M 2+ / M 3+ ⁇ 4.88, and preferably 1.94 ⁇ M 2+ / M 3+ ⁇ 4.26.
- the addition amount of the monovalent organic acid and / or organic acid salt forming a complex with the trivalent metal is 0.1 to 2.2 equivalents, preferably 0.3 to 2 equivalents with respect to the trivalent metal. is there. Less than 0.1 equivalent is not preferable because the primary particles of hydrotalcite are 200 nm or more. When the amount is more than 2.2 equivalents, an anion derived from the complexing agent enters between the layers of the hydrotalcite, and the suspension is gelled by the swelling action, which is not preferable.
- the hydrotalcite of the present invention can be prepared by a continuous reaction. Since the ion concentration and pH in the solution can be kept uniform as compared with the batch reaction, hydrotalcite with less lattice distortion can be produced, and the production efficiency is better than that in the batch reaction.
- the concentration during the reaction is 0.1 to 300 g / L in terms of hydrotalcite, preferably 0.5 to 250 g / L, more preferably 1 to 200 g / L.
- concentration during the reaction is lower than 0.1 g / L, the productivity is low, and when it is higher than 300 g / L, the primary particles are aggregated, which is not preferable.
- the temperature during the reaction is 0 to 60 ° C, preferably 10 to 50 ° C, more preferably 20 to 40 ° C. If the temperature during the reaction is lower than 0 ° C, the suspension freezes, which is not preferable. If the temperature is higher than 60 ° C, the primary particles become 200 nm or more, which is not preferable.
- the pH during the reaction is 8.5 to 11.5, preferably 8.8 to 11.0, and more preferably 9.1 to 10.5.
- the pH at the time of reaction is lower than 8.5, the lattice strain of hydrotalcite is increased and the monodispersity is lowered, which is not preferable.
- higher than 11.5, primary particles of hydrotalcite after aging are not present. Since it becomes 200 nm or more, it is not preferable.
- the suspension containing hydrotalcite prepared in the reaction step is dehydrated, washed with deionized water having a weight 20 to 30 times that of hydrotalcite, and resuspended in water and / or an organic solvent. By passing through this step, salts such as sodium can be removed, and aggregation of primary particles during the ripening step can be prevented.
- ion exchange can be performed with any anion after dehydration and before water washing.
- the first is a method of dehydrating a suspension containing hydrotalcite after reaction to form a cake, dispersing in water and / or alcohol, adding an anion-containing aqueous solution, and stirring and holding.
- the equivalent amount of the anion is 1 to 5 equivalents, more preferably 1.5 to 3 equivalents, relative to the hydrotalcite.
- the temperature for stirring and holding is preferably 30 to 90 ° C, more preferably 50 to 80 ° C.
- the concentration of hydrotalcite is preferably 0.1 to 300 g / L, more preferably 0.5 to 250 g / L, still more preferably 1 to 200 g / L in terms of hydrotalcite.
- the second ion exchange method is a method in which the suspension containing hydrotalcite after the reaction is dehydrated to form a cake, and then an anion-containing aqueous solution is added directly. At this time, the amount of the anion added is 1 to 5 equivalents, preferably 1.5 to 3 equivalents, relative to the hydrotalcite.
- the suspension containing hydrotalcite prepared in the washing step is stirred and held at 0 to 100 ° C. for 1 to 60 hours. By passing through this step, aggregation of primary particles can be relaxed and a suspension in which primary particles are sufficiently dispersed can be obtained. If the aging time is less than 1 hour, it is not sufficient as a time for relaxing aggregation of primary particles. Aging for longer than 60 hours does not make sense because there is no change in the aggregated state. A preferred aging time is 2 to 30 hours, and more preferably 4 to 24 hours. If the aging temperature is higher than 100 ° C., the primary particles exceed 200 nm, which is not preferable.
- the aging temperature is less than 0 ° C, the suspension freezes, which is not preferable.
- the preferred aging temperature is 20 to 90 ° C, more preferably 40 to 80 ° C.
- the concentration at the time of aging is 0.1 to 300 g / L in terms of hydrotalcite, preferably 0.5 to 250 g / L, more preferably 1 to 200 g / L.
- the productivity is low, and when it is higher than 300 g / L, the primary particles are aggregated, which is not preferable.
- surface treatment of the hydrotalcite particles can prevent aggregation of the primary particles in the resin when added, kneaded, and dispersed in the suspension and the resin.
- a wet method or a dry method can be used. In consideration of processing uniformity, a wet method is preferably used.
- the suspension after the aging step is temperature-controlled, and a surface treatment agent dissolved under stirring is added. The temperature during the surface treatment is appropriately adjusted to a temperature at which the surface treatment agent is dissolved.
- the surface treatment agent examples include an anionic surfactant, a cationic surfactant, a phosphate ester treatment agent, a silane coupling agent, a titanate coupling agent, an aluminum coupling agent, a silicone treatment agent, and sodium silicate. At least one selected from can be used. Particularly preferred surface treatment agents are at least one selected from the group consisting of oleic acid, stearic acid, octanoic acid and octylic acid. The amount of the surface treatment agent is 0.01 to 20% by weight, preferably 0.1 to 15% by weight, based on the weight of the hydrotalcite.
- hydrotalcite When hydrotalcite is used as a suspension, the hydrotalcite after water washing is suspended in water and / or an organic solvent.
- concentration of hydrotalcite is 0.1 to 300 g / L, preferably 0.5 to 250 g / L, more preferably 1 to 200 g / L.
- the suspension method is not particularly limited as long as the particles can be uniformly suspended in the solvent.
- organic solvent examples include benzene, toluene, xylene, normal hexane, isohexane, normal heptane, cyclohexane, methylcyclohexane, ethylcyclohexane, methanol, ethanol, normal propyl alcohol, isopropyl alcohol, normal butanol, isobutanol, octanol, monoethylene.
- Glycol diethylene glycol, triethylene glycol, propylene glycol, ethyl acetate, butyl acetate, isobutyl acetate, amyl acetate, methyl acetate, propylene glycol monomethyl ether acetate, methyl ethyl ketone, acetone, methyl isobutyl ketone, diisobutyl ketone, cyclohexanone, isophorone, diacetone Alcohol, ethylene glycol monomethyl ether, ethanol Lenglycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol monomethyl ether, propylene glycol monomethyl ether, isopropyl ether, dichloromethane, trichlene, parkrene, tetrahydrofuran, N, N-dimethylformamide, dimethyl sulfoxide, N-methyl-2
- the hydrotalcite When the hydrotalcite is powdered, it is washed with water and dried to obtain the hydrotalcite of the present invention.
- the drying method can be hot air drying, vacuum drying, or the like, but is not particularly limited. In order to prevent water-mediated aggregation between primary particles, vacuum drying is preferably used.
- the drying temperature is preferably 120 to 350 ° C. and the holding time is preferably 1 to 24 hours.
- the hydrotalcite crystal water can be removed, and the range of m can be 0 ⁇ m ⁇ 0.05.
- a preferable drying temperature is 130 to 340 ° C, more preferably 140 to 330 ° C.
- the preferred drying time is 1.5 to 22 hours, more preferably 2 to 20 hours.
- (A) Crystal strain in ⁇ 003> direction By plotting (sin ⁇ / ⁇ ) on the horizontal axis and ( ⁇ cos ⁇ / ⁇ ) on the vertical axis according to the following relational expression, the crystal grain diameter (g) and the gradient from the reciprocal of the intercept Is multiplied by (1/2) to determine the crystal strain ( ⁇ ).
- ( ⁇ cos ⁇ / ⁇ ) (1 / g) + 2 ⁇ ⁇ (sin ⁇ / ⁇ ) (Where ⁇ represents the wavelength of the X-ray used, and is 1.542 mm for the Cu-K ⁇ line, ⁇ represents the Bragg angle, and ⁇ represents the true half-value width (unit: radians).) ⁇ is determined by the following method.
- the diffraction profiles of the (003) plane and the (006) plane are measured using Cu-K ⁇ rays generated under the conditions of 45 KV and 40 mA as an X-ray source. . Measurement conditions are 10 ° / min at gonio speed, slit width in order of divergence slit, receiving slit, and scattering slit.
- (003) plane is 1 ° -0.3mm-1 °
- (006) plane Is measured under the condition of 2 ° -0.3 mm-2 °.
- the width (B 0 ) at (1/2) of the height from the background to the diffraction peak is measured.
- the above blend was kneaded with an 8-inch roll at 170 ° C. for 5 minutes to prepare a test roll sheet having a thickness of 0.7 mm.
- the obtained roll sheet was used as a test piece having a length and width of 4 cm, placed on a stainless steel plate, and subjected to a thermal stability test at 190 ° C. in an open degree of 60% in a gear oven. Thermal stability was evaluated by time (minutes) until blackening or black spot generation. The longer the time until black spots occur, the better the thermal stability.
- the number average diameter was defined as the average width of the secondary particles. Moreover, the sedimentation state after 1 day and 10 days later was confirmed visually, and when the aqueous layer and the layer containing the particles were completely separated, it was evaluated as “x”, and when the separation of the layers could not be confirmed, it was evaluated as “good”.
- reaction process The flow rate of the water-soluble composite metal salt aqueous solution was set to 120 mL / min, the flow rate of the alkali metal hydroxide aqueous solution was set to 95 mL / min, and each was poured into a cylindrical reaction tank having an overflow capacity of 215 mL to continuously react. went.
- the suspension overflowed from the reaction vessel as an overflow was collected, and the flow rate of the alkali metal hydroxide aqueous solution was adjusted so that the pH was 9.3 to 9.6.
- the temperature of the raw material and the reaction vessel was adjusted so that the reaction temperature was 25 ° C.
- stirring was performed at a rotational speed of 1000 rpm using a screw propeller having a diameter of 2.5 cm.
- the suspension cooled to room temperature was dehydrated using a circular Nutsche and a suction filter bottle to obtain a cake.
- deionized water having 20 times the solid content of the reaction product was used for water washing.
- Example 1 The cake after washing with water was placed in a stainless steel vat and left overnight at 40 ° C. in a vacuum dryer while maintaining a vacuum degree of 30 cmHg with a vacuum pump to obtain Sample 1.
- the experimental conditions of Example 1 are shown in Table 1.
- Example 1 In the raw material preparation step of Example 1, in addition to magnesium chloride hexahydrate (Wako Pure Chemical) and aluminum chloride hexahydrate (Wako Pure Chemical), zinc chloride (Wako Pure Chemical) is dissolved in deionized water, An aqueous solution of magnesium 0.15 mol / L, zinc 0.05 mol / L, and aluminum 0.1 mol / L was obtained. To this aqueous solution, 1.75 equivalents of sodium lactate (Kishida Kagaku) was added to aluminum to obtain a water-soluble composite metal salt aqueous solution.
- sodium lactate Korean
- Example 2 sodium hydroxide (Wako Pure Chemical Industries, Ltd.) was dissolved in deionized water so as to be 0.8 mol / L to obtain an alkali metal hydroxide aqueous solution. Samples were prepared in the same manner after that, and Sample 2 was obtained.
- the experimental conditions of Example 2 are shown in Table 1, and the chemical composition, crystal strain in the ⁇ 003> direction, average lateral width of primary particles, average lateral width of secondary particles, monodispersity, BET specific surface area, surface treatment amount, It shows in Table 2.
- Sample 3 was obtained in the same manner except that the concentration of the raw material was adjusted to 0.3 mol / L magnesium and 0.1 mol / L aluminum in the raw material adjustment step of Example 1.
- the experimental conditions of Example 3 are shown in Table 1.
- Example 4 In the raw material preparation step of Example 1, a sample was prepared in the same manner except that the raw material concentration was adjusted to 1 mol / L for magnesium, 0.5 mol / L for aluminum, and 4.0 mol / L for sodium hydroxide, Sample 4 was obtained.
- the experimental conditions of Example 4 are shown in Table 1.
- a 10,000 times SEM photograph of Sample 4 is shown in FIG. 3, and a 100,000 times SEM photograph is shown in FIG.
- Example 5 A sample 5 was obtained in the same manner as in the raw material preparation step of Example 1, except that 0.5 equivalent of sodium lactate (Kishida Chemical Co.) was added to aluminum.
- the experimental conditions of Example 5 are shown in Table 1, and the chemical composition, crystal strain in the ⁇ 003> direction, average lateral width of primary particles, average lateral width of secondary particles, monodispersity, BET specific surface area, surface treatment amount, It shows in Table 2.
- Sample 6 was obtained in the same manner except that the flow rate of the aqueous alkali metal hydroxide solution was adjusted so that the reaction pH was 10.5 to 10.8 in the reaction step of Example 1.
- the experimental conditions of Example 6 are shown in Table 1.
- Example 7 In the aging step of Example 1, a sample was prepared in the same manner except that the aging temperature was 90 ° C., and Sample 7 was obtained.
- the experimental conditions of Example 7 are shown in Table 1.
- Example 8 In the reaction step of Example 1, a sample was prepared in the same manner except that the reaction temperature was 45 ° C., and Sample 8 was obtained.
- the experimental conditions of Example 8 are shown in Table 1, and the chemical composition, crystal strain in the ⁇ 003> direction, average lateral width of primary particles, average lateral width of secondary particles, monodispersity, BET specific surface area, surface treatment amount, It shows in Table 2.
- Sample 9 was obtained in the same manner except that the reaction temperature was 45 ° C. in the reaction step of Example 1 and the aging temperature was 90 ° C. in the aging step.
- the experimental conditions of Example 9 are shown in Table 1, and the chemical composition, crystal strain in the ⁇ 003> direction, average lateral width of primary particles, average lateral width of secondary particles, monodispersity, BET specific surface area, surface treatment amount, It shows in Table 2.
- Example 10 In the washing process of Example 1, a sample was prepared in the same manner except that 1.5 equivalent of an aqueous sodium perchlorate solution was added to the cake of aluminum of hydrotalcite contained in the cake, and ion exchange was performed. It produced and the sample 10 was obtained.
- the experimental conditions of Example 10 are shown in Table 1.
- Example 11 In the aging step of Example 1, a sample was prepared in the same manner except that the aging time was 1.5 hours, and Sample 11 was obtained.
- the experimental conditions of Example 11 are shown in Table 1, and the chemical composition, crystal strain in the ⁇ 003> direction, average lateral width of primary particles, average lateral width of secondary particles, monodispersity, BET specific surface area, surface treatment amount, It shows in Table 2.
- Example 1 In the surface treatment step of Example 1, 1 equivalent of 1 mol / L sodium hydroxide (manufactured by Wako Pure Chemical Industries) aqueous solution with respect to stearic acid was added to stearic acid (manufactured by Wako Pure Chemical Industries) under a temperature control of 80 ° C. An aqueous sodium acid solution was obtained. Using deionized water whose temperature was adjusted to 80 ° C., the concentration of the aqueous sodium stearate solution was adjusted so that the stearic acid concentration was 5 g / L.
- the concentration of the suspension after aging treatment was adjusted to 10 g / L, and then the temperature was adjusted to 80 ° C. using a thermostatic bath. Under stirring with a jet agitator, an aqueous sodium stearate solution having an amount of 10 wt% based on hydrotalcite as stearic acid was added to the suspension at a flow rate of 3 mL / L. After adding the sodium stearate aqueous solution, the mixture was stirred and held at 80 ° C. for 30 minutes. Sample 12 was obtained in the same manner for other steps.
- the experimental conditions of Example 12 are shown in Table 1.
- Example 1 Sample 1 of Example 1 was put into a hot air dryer and dried at 200 ° C. for 12 hours to obtain Sample 13.
- the experimental conditions of Example 13 are shown in Table 1.
- Comparative Example 2 In the raw material preparation step of Example 1, a sample was prepared in the same manner except that sodium lactate was not added, and Sample 14 was obtained.
- the experimental conditions of Comparative Example 1 are shown in Table 1, and the chemical composition, crystal strain in the ⁇ 003> direction, average lateral width of primary particles, average lateral width of secondary particles, monodispersity, BET specific surface area, surface treatment amount, It shows in Table 2. (Comparative Example 2)
- Example 3 In the reaction step of Example 1, a sample was prepared in the same manner except that the reaction temperature was 75 ° C., and Sample 15 was obtained.
- the experimental conditions of Comparative Example 2 are shown in Table 1.
- FIG. 5 shows a 10,000 times SEM photograph of Sample 15, and FIG. 6 shows a 100,000 times SEM photograph. (Comparative Example 3)
- Comparative Example 4 A sample was prepared in the same manner as in Example 1 except that the reaction pH was 8.0 to 8.3.
- the experimental conditions of Comparative Example 3 are shown in Table 1, and the chemical composition, crystal strain in the ⁇ 003> direction, average primary particle width, secondary particle average width, monodispersity, BET specific surface area, and surface treatment amount, It shows in Table 2. (Comparative Example 4)
- Comparative Example 5 A sample was prepared in the same manner as in Example 1, except that the reaction pH was changed to 11.7 to 12.0, and Sample 17 was obtained.
- the experimental conditions of Comparative Example 4 are shown in Table 1, and the chemical composition, crystal strain in the ⁇ 003> direction, average primary particle width, secondary particle average width, monodispersity, BET specific surface area, and surface treatment amount, It shows in Table 2. (Comparative Example 5)
- Comparative Example 6 A sample was prepared in the same manner as in the aging step of Example 1, except that aging was performed at 120 ° C. for 24 hours using an autoclave.
- the experimental conditions of Comparative Example 5 are shown in Table 1.
- Example 1 In the aging step of Example 1, a sample was prepared in the same manner except that aging was not performed, and Sample 19 was obtained.
- the experimental conditions of Comparative Example 6 are shown in Table 1.
- a 10,000 times SEM photograph of Sample 19 is shown in FIG. 7, and a 100,000 times SEM photograph is shown in FIG.
- Sample 1 obtained in Example 1 was blended with polyvinyl chloride resin at the following blending ratio, and thermal stability and transparency were evaluated.
- Polyvinyl chloride degree of polymerization 1300: 100 parts DOP (dioctyl phthalate): 50 parts
- the above blend was kneaded with an 8-inch roll at 170 ° C. for 5 minutes to prepare a test roll sheet having a thickness of 0.7 mm.
- the obtained roll sheet was used as a test piece having a length and width of 4 cm, placed on a stainless steel plate, and subjected to a thermal stability test at 190 ° C. in an open degree of 60% in a gear oven. Thermal stability was evaluated by time (minutes) until blackening or black spot generation.
- the roll sheet was cut into 4 cm in length and width, placed in a 3 mm stack, 3 mm thick, sandwiched from above and below with a stainless plate, and pressed with a press machine at 200 ° C. for 10 minutes at 100 MPa to prepare a test piece. .
- the haze (haze) of the prepared test piece was measured according to JIS. K. Based on 7136, it measured with the haze meter and evaluated transparency. Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 14.
- Example 2 Sample 2 obtained in Example 2 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 15.
- Example 3 Sample 3 obtained in Example 3 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency. Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 16.
- Example 4 Sample 4 obtained in Example 4 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 17.
- Example 5 Sample 5 obtained in Example 5 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 18.
- Example 6 Sample 6 obtained in Example 6 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 19.
- Example 7 Sample 7 obtained in Example 7 was blended in a polyvinyl chloride resin at the same blending ratio as in Example 13, and the thermal stability and transparency were evaluated. Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 20.
- Example 8 Sample 8 obtained in Example 8 was blended in a polyvinyl chloride resin at the same blending ratio as in Example 13, and the thermal stability and transparency were evaluated. Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 21.
- Example 9 Sample 9 obtained in Example 9 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 22.
- Example 10 Sample 10 obtained in Example 10 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 23.
- Example 11 Sample 11 obtained in Example 11 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 24.
- Example 12 Sample 12 obtained in Example 12 was blended with a polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 25.
- Example 13 Sample 13 obtained in Example 13 was blended with polyvinyl chloride resin at the same blending ratio as in Example 13 to evaluate thermal stability and transparency.
- Table 3 shows the formulation, thermal stability test results, and transparency test results in Example 26. (Comparative Example 7)
- Example 1 10 g of hydrotalcite washed with water after the surface treatment was collected in terms of solid content and added to 1 L of isopropyl alcohol. Then, it stirred for 20 minutes with 6000 rpm with the homogenizer, and produced suspension. The suspension was transferred to a 1 L settling tube and left in that state for 10 days. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 2 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 3 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 4 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 5 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 6 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 7 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 8 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 9 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 10 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 11 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 12 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- Example 13 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4. (Comparative Example 13)
- Comparative Example 1 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4. (Comparative Example 14)
- Comparative Example 2 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4. (Comparative Example 15)
- Comparative Example 3 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4. (Comparative Example 16)
- Comparative Example 4 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4. (Comparative Example 17)
- Comparative Example 5 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4. (Comparative Example 18)
- Comparative Example 6 the hydrotalcite washed with water after the surface treatment was treated in the same manner as in Example 27 to prepare a suspension. Sampling was performed immediately after suspension, 1 day later, and 10 days later, and the average horizontal width and sedimentation state of secondary particles were evaluated. Each evaluation result is shown in Table 4.
- the hydrotalcite of the present invention can be used in various applications such as a heat stabilizer for vinyl chloride resin, a neutralizing agent for polyolefin polymerization catalyst residues, an acid acceptor for halogen-containing rubber, and a heat retaining agent for agricultural films.
- a suspension containing hydrotalcite can be suitably used as a liquid antacid or heat stabilizer. Since the hydrotalcite of the present invention has greatly improved anion exchange capacity than before, the same blending amount exhibits an effect as a stabilizer, neutralizer, and acid acceptor superior to those of the prior art, The same performance as before can be achieved with a small amount. Moreover, when mix
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Abstract
Description
(M2+)1-X(M3+)X(OH)2(An-)X/n・mH2O (1)
(ただし、式中M2+は2価金属の少なくとも1種以上、M3+は3価金属の少なくとも1種以上、An-はn価のアニオン、nは1~6の整数をそれぞれ示し、xおよびmはそれぞれ、0.17≦x≦0.36、0≦m≦10の範囲にある。)
(A)X線回折法による<003>方向の格子歪が3×10-3以下;
(B)SEM法による1次粒子の平均横幅が5nm以上200nm以下;
(C)下記式で表わされる単分散度が50%以上
単分散度(%)=(SEM法による1次粒子の平均横幅/動的光散乱法による2次粒子の平均横幅)×100
(2)(1)で調整した水溶性複合金属塩水溶液とアルカリ金属水酸化物水溶液を、反応温度0~60℃、反応pH8.5~11.5で連続反応させ、ハイドロタルサイトを含む懸濁液を得る反応工程。
(3)(2)で得られたハイドロタルサイトを含む懸濁液を脱水後、水洗浄を行い、水及び/又は有機溶媒に懸濁させる洗浄工程。
(4)(3)で得られた洗浄後のハイドロタルサイトを含む懸濁液を、0~100℃で1~60時間攪拌保持する熟成工程。
<ハイドロタルサイト>
本発明のハイドロタルサイトの、化学式、金属の種類、xの範囲(2価金属と3価金属の存在比)、mの範囲、層間アニオンの種類、<003>方向の格子歪、1次粒子の平均横幅、単分散度、BET法比表面積及び表面処理は以下の通りである。
本発明のハイドロタルサイトは、以下の式(1)で表される。
(M2+)1-X(M3+)X(OH)2(An-)X/n・mH2O (1)
(ただし、式中M2+は2価金属の少なくとも1種以上、M3+は3価金属の少なくとも1種以上、An-はn価のアニオン、nは1~6の整数をそれぞれ示し、xおよびmはそれぞれ、0.17≦x≦0.36、0≦m≦10の範囲にある。)
式(1)で表されるハイドロタルサイトにおいて、M2+は2価金属の少なくとも1種以上、M3+は3価金属の少なくとも1種以上である。好ましい2価金属はMg及びZnからなる群より選ばれる1種以上であり、好ましい3価金属はAlである。これは、生体への安全性が高く、かつ粒子が白色で用途が広いためである。
式(1)で表されるハイドロタルサイトにおいて、xの範囲は0.17≦x≦0.36であり、好ましくは0.19≦x≦0.34である。xが0.36を超えるとベーマイトが副生し、逆に0.17より小さくなると水酸化マグネシウムが副生し、いずれも樹脂に配合した際に透明性低下の原因となる。
式(1)で表されるハイドロタルサイトにおいて、mの範囲は0≦m≦10であり、好ましくは0≦m≦6である。
式(1)で表されるハイドロタルサイトにおいて、An-はn価のアニオン、nは1~6の整数をそれぞれ示し、好ましいAn-はCO3 2-及びClO4 -から選ばれる1種以上である。
本発明のハイドロタルサイトにおいて、X線回折法における<003>方向の格子歪は3×10-3以下であり、好ましくは2.5×10-3以下、さらに好ましくは2×10-3以下である。<003>方向の格子歪が3×10-3より大きければ、粉体にした際や、懸濁液として長期保存した際に、1次粒子が凝集しやすくなる。
1次粒子とは、幾何学的にこれ以上分割できない明確な境界を持った粒子である。図1は、本発明で用いた1次粒子の横幅(W1)を説明する模式図である。図1に示すように、1次粒子の横幅W1を規定する。すなわち、1次粒子が六角板状の板面としたときの粒子の長径が「1次粒子の横幅W1」である。
2次粒子とは、1次粒子が複数個集まり、凝集体となった粒子である。図2は、本発明で用いた2次粒子と2次粒子の横幅(W2)を説明する模式図である。図2に示すように、2次粒子の横幅W2を規定する。すなわち、2次粒子が球体に包まれると考えたときの球体の直径が「2次粒子の横幅W2」である。
本発明のハイドロタルサイトにおいて、SEM法による1次粒子の平均横幅は5nm以上200nm以下であり、好ましくは5nm以上150nm以下、さらに好ましくは5nm以上100nm以下、さらに好ましくは5nm以上80nm以下、さらに好ましくは5nm以上60nm以下、最も好ましくは5nm以上50nm以下である。1次粒子の平均横幅は、SEM法によりSEM写真中の任意の100個の結晶の横幅の測定値の算術平均から求める。1次粒子の横幅は、原理上レーザー回折法では測定することができない。したがって、SEM法により目視で確認する。
本発明のハイドロタルサイトにおいて、下記式で表わされる単分散度は50%以上であり、好ましくは80%以上である。2次粒子の横幅は、動的光散乱法により測定する。SEM法では、2次粒子の横幅を正確に測定することが困難なためである。
単分散度(%)=(SEM法よる1次粒子の平均横幅/動的光散乱法による2次粒子の平均横幅)×100
本発明のハイドロタルサイトにおいて、BET法比表面積は20~600m2/gであり、好ましくは30~500m2/g、さらに好ましくは40~400m2/gである。BET法比表面積が20m2/g未満では、粉体状態の1次粒子の分散が十分ではない。600m2/gを超えれば、粉体の嵩が高くなり、合成樹脂と混錬する場合などにおけるハンドリング性が悪くなる。
本発明のハイドロタルサイトにおいて、樹脂中での分散性を改善するため、粒子を表面処理することが望ましい。表面処理剤としては、アニオン系界面活性剤、カチオン系界面活性剤、リン酸エステル類処理剤、シランカップリング剤、チタネートカップリング剤、アルミニウムカップリング剤、シリコーン系処理剤、ケイ酸及び水ガラス等を例示することができるが、この限りではない。特に好ましい表面処理剤は、オレイン酸、ステアリン酸、オクタン酸及びオクチル酸からなる群より選ばれる1種以上である。表面処理剤の量は、ハイドロタルサイトの重量に対して、0.01~20重量%、好ましくは0.1~15重量%である。
本発明の樹脂組成物は、100重量部の樹脂に対して、0.1~250重量部の本発明のハイドロタルサイトを含有する。ハイドロタルサイトの配合量は、より好ましくは100重量部の樹脂に対して1~200重量部である。
本発明は、上記樹脂組成物よりなる成形体を包含する。
本発明の懸濁液は、溶媒が水及び/又は有機溶媒であり、ハイドロタルサイトの濃度は0.1~300g/Lである。ハイドロタルサイトの濃度は、好ましくは0.5~250g/L、より好ましくは1~200g/Lである。
本発明のハイドロタルサイトの製造方法は、以下の4つの工程を含む。
(2)(1)で調整した水溶性複合金属塩水溶液とアルカリ金属水酸化物水溶液を、反応温度0~60℃、反応pH8.5~11.5で連続反応させ、ハイドロタルサイトを含む懸濁液を得る反応工程。
(3)(2)で得られたハイドロタルサイトを含む懸濁液を脱水後、水洗浄を行い、水及び/又は有機溶媒に懸濁させる洗浄工程。
(4)(3)で得られた洗浄後のハイドロタルサイトを含む懸濁液を、0~100℃で1~60時間攪拌保持する熟成工程。
本発明のハイドロタルサイトの原料は、2価金属塩、3価金属塩、3価金属と錯体を形成する1価の有機酸及び/又は有機酸塩及び、アルカリ金属水酸化物塩である。2価金属塩としては、水溶性の2価金属塩、例えば塩化マグネシウム、臭化マグネシウム、硝酸マグネシウム、酢酸マグネシウム、塩化亜鉛、臭化亜鉛、硝酸亜鉛、酢酸亜鉛等が挙げられるが、この限りではない。1次粒子の凝集を防ぐため、好ましくは、1価のアニオンを含む2価金属塩が用いられる。2種以上の2価の金属塩を組み合わせることもできる。好ましくは、塩化マグネシウム及び/又は塩化亜鉛が用いられる。3価金属塩としては、水溶性の3価金属塩、例えば塩化アルミニウム、臭化アルミニウム、硝酸アルミニウム、酢酸アルミニウムが挙げられるが、この限りではない。1次粒子の凝集を防ぐため、好ましくは1価のアニオンを含む3価の金属塩が用いられる。2種以上の3価の金属塩を組み合わせることもできる。好ましくは塩化アルミニウムが用いられる。
本発明のハイドロタルサイトは、連続反応で作製することができる。バッチ反応に比べ溶液中でのイオン濃度とpHを均一に保つことできるため、格子歪の少ないハイドロタルサイトが作製でき、かつバッチ反応に比べて製造効率が良い。
反応工程で作製したハイドロタルサイトを含む懸濁液を、脱水した後、ハイドロタルサイトの20~30倍の重量の脱イオン水で水洗浄し、水及び/又は有機溶媒に再懸濁させる。この工程を経ることによって、ナトリウム等の塩類を取り除き、熟成工程の際の1次粒子の凝集を防ぐことができる。
洗浄工程で作製したハイドロタルサイトを含んだ懸濁液を、1~60時間、0~100℃で、攪拌保持する。この工程を経ることにより、1次粒子の凝集を緩和し、1次粒子が十分に分散した懸濁液を得ることができる。熟成時間が1時間未満では、1次粒子の凝集を緩和するための時間として十分ではない。60時間より長く熟成しても、凝集状態に変化がないため意味をなさない。好ましい熟成時間は2~30時間であり、さらに好ましくは4~24時間である。熟成温度が100℃より高ければ、1次粒子が200nmを超えてしまうため好ましくない。熟成温度が0℃未満では、懸濁液が凍ってしまうため好ましくない。好ましい熟成温度は20~90℃であり、さらに好ましくは40~80℃である。熟成時の濃度はハイドロタルサイト換算で0.1~300g/Lであり、好ましくは0.5~250g/L、さらに好ましくは1~200g/Lである。熟成時の濃度が0.1g/Lより低い場合は生産性が低く、300g/Lより高い場合は1次粒子が凝集するため好ましくない。
熟成工程後、ハイドロタルサイト粒子を表面処理することで、懸濁液及び、樹脂に添加、混練、分散する場合の、樹脂中での1次粒子の凝集を防止できる。表面処理は、湿式法又は乾式法を用いることができる。処理の均一性を考慮した場合、湿式法が好適に用いられる。熟成工程後の懸濁液を温調し、撹拌下に溶解させた表面処理剤を添加する。表面処理時の温度は表面処理剤が溶解する温度に適宜調整する。
表面処理後の懸濁液を脱水し、固形分に対して20~30倍の重量の脱イオン水にて水洗浄をする。
次の関係式により、横軸に(sinθ/λ)、縦軸に(βcosθ/λ)をプロットし、切片の逆数から結晶粒子径(g)と、勾配に(1/2)を乗じて結晶歪(η)を求める。
(βcosθ/λ)=(1/g)+2η×(sinθ/λ)
(ただし、λは使用したX線の波長を表し、Cu-Kα線で1.542Åである。θはブラッグ角、βは真の半値幅(単位:ラジアン)を表す。)
上記βは以下の方法により求める。
X線回折装置(Empyrean、パナリティカル製)を用い、(003)面と(006)面の回折プロファイルを、X線源として45KV、40mAの条件で発生させたCu-Kα線を用いて測定する。測定条件はゴニオスピードで10°/min、スリット幅を、ダイバージェンススリット、レシービングスリット、スキャタリングスリットの順で、(003)面については、1°―0.3mm―1°、(006)面については2°―0.3mm-2°の条件で測定する。得られたプロファイルにつき、バックグラウンドから回折ピークまでの高さの(1/2)における幅(B0)を測定する。2θに対するKα1、Kα2のスプリット幅(δ)の関係から、(003)面、(006)面の2θに対するδを読み取る。次いで、上記B0及びδの値に基づいて、(δ/B0)と(B/B0)の関係からBを求める。続いて、高純度シリコン(純度99.999%)について、スリット幅(1/2)°―0.3mm-(1/2)°で各回折プロファイルを測定し、半値幅(b)を求める。これを2θに対してプロットし、bと2θの関係を示すグラフを作成する。(003)面、(006)面の2θに相当するbから(b/β)を求める。(b/B)と(β/B)の関係から、βを求める。
エタノールにサンプルを加え、超音波処理を5分間行った後、走査型電子顕微鏡(SEM)(JSM-7600F、日本電子製)を用い、任意の100個の結晶の1次粒子の横幅を測定し、その算術平均をもって1次粒子の平均横幅とした。
エタノールにサンプルを加え、超音波処理を5分間行った後、動的光散乱法粒度測定機(ELSZ-2、大塚電子製)を用いて粒度分布を測定し、その個数平均径をもって、2次粒子の平均横幅とした。
以下の式に基づいて、(b)及び(c)の値から算出した。
単分散度(%)=(SEM法よる1次粒子の平均横幅/動的光散乱法による2次粒子の平均横幅)×100
比表面積の測定装置(NOVA2000、ユアサアイオニクス製)を使用して、ガス吸着法により乾燥後のサンプルの比表面積を測定した。
サンプルを硝酸に加熱・溶解させた後、Mg、Zn、Alはキレート滴定にて、Clはフォルハルト法滴定にて定量した。CO3はJIS.R.9101に基づき、AGK式CO2簡易精密定量装置にて定量した。層間水は、TG-DTAを用い重量減少から算出した。
サンプルのオレイン酸及びステアリン酸処理量は、エーテル抽出法にて定量した。
サンプルをポリ塩化ビニル樹脂に下記配合比で配合し、熱安定性を評価した。
ポリ塩化ビニル(重合度1300):100部
DOP:50部
サンプル:1.6部
ステアリン酸亜鉛:0.4部
(h)で作製したロールシートを、縦横4cmに切り取り、3枚重ね、厚さ2mmの型枠に入れ、上下からステンレス版で挟み、プレス機にて、200℃10分、100MPaでプレスし、試験片を作製した。作製した試験片のヘーズ(曇り度)を、JIS.K.7136に基づき、ヘーズメーター(オートマチックヘーズメーターTC-H3DP、東京電色製)で測定し、透明性を評価した。ヘーズが低い方が、透明性に優れる。
イソプロピルアルコール1Lに対し、表面処理及び水洗浄後のハイドロタルサイトを、固形分として10gを添加し、ホモジナイザーで6000rpm、20分間攪拌し、懸濁液を作製した。懸濁液を1Lの沈降管に移し、その状態で10日間静置した。懸濁直後、1日後、10日後にサンプリングを行い、それぞれの2次粒子の平均横幅及び、沈降状態を評価した。2次粒子の平均横幅については、懸濁液に対して超音波処理を5分間行った後、動的光散乱法粒度測定機(ELSZ-2、大塚電子製)を用いて粒度分布を測定し、その個数平均径をもって、2次粒子の平均横幅とした。また、1日後、10日後の沈降状態を目視で確認し、水層と粒子を含有する層が完全に分離している場合は×、層の分離が確認できない場合は○として評価した。
塩化マグネシウム6水和物(和光純薬)と塩化アルミニウム6水和物(和光純薬)を脱イオン水に溶解させ、マグネシウム0.2mol/L、アルミニウム0.1mol/Lの水溶液を得た。この水溶液に対し、アルミニウムに対して1.75当量の乳酸ナトリウム(キシダ化学)を添加し、水溶性複合金属塩水溶液とした。一方、水酸化ナトリウム(和光純薬)を0.8mol/Lとなるよう脱イオン水に溶解させ、アルカリ金属水酸化物水溶液とした。
水溶性複合金属塩水溶液の流量を120mL/min、アルカリ金属水酸化物水溶液の流量を95mL/minに設定し、オーバーフロー容量215mLの円柱状の反応槽にそれぞれを注加し、連続的に反応を行った。オーバーフローとして反応槽から溢れ出た懸濁液を採取し、pHが9.3~9.6となるよう、アルカリ金属水酸化物水溶液の流量を調整した。なお反応中は、反応温度が25℃となるよう原料と反応槽を温度調整した。また、反応中は直径2.5cmのスクリュープロペラを用い、回転速度1000rpmで撹拌を行った。
円形ヌッチェと吸引濾過瓶を用い、懸濁液を吸引濾過にて脱水し、ケーキとした。次に、ケーキに含まれるハイドロタルサイトのアルミニウムに対して1.5当量の炭酸ナトリウム水溶液をケーキに注加し、イオン交換を行った。次に、ハイドロタルサイトの30質量倍の脱イオン水を用い、塩類などの副生成物及び残留炭酸ナトリウム等の不純物を除去する目的で、イオン交換後ケーキの水洗浄を行った。
水洗浄後のケーキを脱イオン水に再懸濁させた。再懸濁はホモミキサーを用い、回転数4000rpmで20分間行った。再懸濁した懸濁液に脱イオン水を注加し、50g/Lに濃度調整した。濃度調整後の懸濁液を恒温槽にて60℃に保ち、24時間の熟成処理を行った。
(表面処理工程)
(乾燥工程)
(比較例1)
(比較例2)
(比較例3)
(比較例4)
(比較例5)
(比較例6)
ポリ塩化ビニル(重合度1300):100部
DOP(フタル酸ジオクチル):50部
サンプル:1.6部
ステアリン酸亜鉛:0.4部
(比較例7)
(比較例8)
(比較例9)
(比較例10)
(比較例11)
(比較例12)
(比較例13)
(比較例14)
(比較例15)
(比較例16)
(比較例17)
(比較例18)
Claims (15)
- 以下の(A)~(C)を満たす下記式(1)で表されるハイドロタルサイト。
(M2+)1-X(M3+)X(OH)2(An-)X/n・mH2O (1)
(ただし、式中M2+は2価金属の少なくとも1種以上、M3+は3価金属の少なくとも1種以上、An-はn価のアニオン、nは1~6の整数をそれぞれ示し、xおよびmはそれぞれ、0.17≦x≦0.36、0≦m≦10の範囲にある。)
(A)X線回折法による<003>方向の格子歪が3×10-3以下;
(B)SEM法による1次粒子の平均横幅が5nm以上200nm以下;
(C)下記式で表わされる単分散度が50%以上
単分散度(%)=(SEM法による1次粒子の平均横幅/動的光散乱法による2次粒子の平均横幅)×100 - 請求項1において、(A)X線回折法による<003>方向の格子歪が2.5×10-3以下である、請求項1記載のハイドロタルサイト。
- 請求項1において、(B)SEM法による1次粒子の平均横幅が5nm以上150nm以下である、請求項1記載のハイドロタルサイト。
- 請求項1において、(C)単分散度が80%以上である、請求項1記載のハイドロタルサイト。
- 請求項1の式(1)において、M2+がMg、Znからなる群より選ばれる1種以上であり、M3+がAlである、請求項1記載のハイドロタルサイト。
- 請求項1の式(1)において、mの範囲が0≦m≦0.05である、請求項1記載のハイドロタルサイト。
- BET法比表面積が20~600m2/gである、請求項1記載のハイドロタルサイト。
- ハイドロタルサイトの表面が、アニオン系界面活性剤、カチオン系界面活性剤、リン酸エステル類処理剤、シランカップリング剤、チタネートカップリング剤、アルミニウムカップリング剤、シリコーン系処理剤、ケイ酸及び水ガラスからなる群より選ばれる1種以上で表面処理されている、請求項1記載のハイドロタルサイト。
- 以下の4つの工程を含む、ハイドロタルサイトの製造方法。
(1)水溶性複合金属塩水溶液及び、アルカリ金属水酸化物水溶液を調製する原料調製工程。ただし、該水溶性複合金属塩水溶液は、2価金属塩、3価金属塩及び、3価金属と錯体を形成する1価の有機酸及び/又は有機酸塩を含む。
(2)(1)で調整した水溶性複合金属塩水溶液とアルカリ金属水酸化物水溶液を、反応温度0~60℃、反応pH8.5~11.5で連続反応させ、ハイドロタルサイトを含む懸濁液を得る反応工程。
(3)(2)で得られたハイドロタルサイトを含む懸濁液を脱水後、水洗浄を行い、水及び/又は有機溶媒に懸濁させる洗浄工程。
(4)(3)で得られた洗浄後のハイドロタルサイトを含む懸濁液を、0~100℃で1~60時間攪拌保持する熟成工程。 - 請求項9の原料調整工程において、3価金属と錯体を形成する1価の有機酸及び/又は有機酸塩が、乳酸、乳酸ナトリウム、酢酸及び酢酸ナトリウムからなる群より選ばれる一種以上である、請求項9記載のハイドロタルサイトの製造方法。
- 請求項1記載のハイドロタルサイトを、100℃~350℃で1~24時間乾燥して得ることを特徴とする、請求項6記載のハイドロタルサイトの製造方法。
- 樹脂100重量部に対して、請求項1記載のハイドロタルサイトを0.1~250重量部含有する樹脂組成物。
- 樹脂が含ハロゲン樹脂である、請求項12記載の樹脂組成物。
- 請求項12に記載の樹脂組成物よりなる成形体。
- 溶媒が水及び/又は有機溶媒であり、請求項1記載のハイドロタルサイトを、固形分濃度として0.1~300g/L含有する懸濁液。
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JP2019094372A (ja) * | 2017-11-17 | 2019-06-20 | 協和化学工業株式会社 | ペースト用塩化ビニル系樹脂組成物 |
WO2022050173A1 (ja) | 2020-09-01 | 2022-03-10 | 協和化学工業株式会社 | 表面処理ハイドロタルサイト及びその懸濁液、並びにそれを用いた機能性分子送達系 |
CN118374112A (zh) * | 2024-05-17 | 2024-07-23 | 宜兴汉光高新石化有限公司 | 一种高阻燃性阻燃复合助剂及聚丙烯复合材料 |
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KR20190122855A (ko) | 2019-10-30 |
EP3597600B1 (en) | 2024-09-18 |
US20200017365A1 (en) | 2020-01-16 |
EP3597600A4 (en) | 2021-01-27 |
JPWO2018169019A1 (ja) | 2019-11-21 |
KR102491799B1 (ko) | 2023-01-25 |
US11591234B2 (en) | 2023-02-28 |
CN110612271A (zh) | 2019-12-24 |
CN110612271B (zh) | 2022-06-21 |
JP6607549B2 (ja) | 2019-11-20 |
EP3597600A1 (en) | 2020-01-22 |
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