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WO1998052981A1 - Procede de production d'ionomeres au moyen de terpolymeres d'ethylene - Google Patents

Procede de production d'ionomeres au moyen de terpolymeres d'ethylene Download PDF

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Publication number
WO1998052981A1
WO1998052981A1 PCT/US1997/008937 US9708937W WO9852981A1 WO 1998052981 A1 WO1998052981 A1 WO 1998052981A1 US 9708937 W US9708937 W US 9708937W WO 9852981 A1 WO9852981 A1 WO 9852981A1
Authority
WO
WIPO (PCT)
Prior art keywords
inorganic metal
acid
terpolymer
ethylene
weight percent
Prior art date
Application number
PCT/US1997/008937
Other languages
English (en)
Inventor
Steven P. Current
Leslie P. Theard
Original Assignee
Chevron Chemical Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chevron Chemical Company filed Critical Chevron Chemical Company
Priority to PCT/US1997/008937 priority Critical patent/WO1998052981A1/fr
Publication of WO1998052981A1 publication Critical patent/WO1998052981A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/02—Ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/44—Preparation of metal salts or ammonium salts

Definitions

  • the present invention relates to a process for the production of ionomers from ethylene terpolymers and in particular ethylene-alkyl acrylate- acrylic acid terpolymers.
  • (meth)acrylate copolymers are recognized in the art. Such ionomers can be employed within a variety of environments. For example, they can be employed in place of traditional polyolefins within adhesive combinations such as hot melt adhesive combinations. Furthermore, such ionomers can be particularly useful in multilayer films as seal layers.
  • U.S. Patent 3,970,626 to Hurst et al relates to a batch process for the production of ionomers.
  • this process relates to the caustic hydrolysis of ethylene-(meth)acrylate copolymers using an excess of sodium hydroxide in an aqueous solution.
  • such processes typically require long residence times, i.e., on the order of several hours, and yield a product in a form which requires further processing, i.e., an emulsion rather than a solid polymer.
  • Patent 5,218,057 to Kurkov et al discloses a continuous process for the production of such ionomers within a reaction vessel, e.g., a reactive extruder.
  • this method involves the saponification of ethylene-alkyl (meth)acrylate copolymers such as EMAC ® (an ethylene methacrylate copolymer product of Chevron Chemical Co.) with an aqueous solution of an alkali metal base under saponification reaction conditions within a reactive extruder.
  • EMAC ® an ethylene methacrylate copolymer product of Chevron Chemical Co.
  • the present invention is based on the ability to produce ionomers from an ethylene terpolymer by neutralization of at least a portion of the acidic components of the terpolymer with a metal-containing solution such as an alkali metal base.
  • this process comprises contacting: (a) a terpolymer containing structural units produced from (i) ⁇ -olefins having from 2 to 8 carbon atoms; (ii) esters of alpha, beta-ethylenically-unsaturated carboxylic acids; and (iii) carboxylic acids with (b) an inorganic metal-containing base under conditions effective to convert at least a portion of the acid functionality to inorganic metal salts thereof.
  • the present invention relates to ionomers produced by the inventive process.
  • the present invention relates to a process for the neutralization of an ethylene terpolymer so as to produce an ionomer thereof.
  • terpolymer can include three or more monomer constituents as well as substituted derivatives thereof.
  • terpolymer as used herein is intended to refer to true interpolymers of ethylene and the other monomers, as well as blends of copolymers of ethylene and acid monomers, e.g., acrylic acid with copolymers of ethylene and ester monomers, e.g., acrylates.
  • the preferred embodiments discuss "ethylene" terpolymers, as will be seen, the present invention also encompasses the use of polymers produced from other ⁇ -olefins.
  • the terpolymers of the present invention include structural units produced from:
  • alpha-olefins having from 2 to 8 carbon atoms
  • esters of alpha, beta-ethylenically-unsaturated carboxylic acids and, (iii) carboxylic acids.
  • Monomer (i) includes alpha-olefins having from 2 to 8 carbon atoms.
  • Preferably monomer (i) comprises alpha-olefins having from 2 to 3 carbon atoms, and more preferably, monomer (i) is ethylene.
  • Monomer (ii) comprises esters of ,j8-ethylenically-unsaturated carboxylic acids, preferably having from 4 to 22 carbon atoms. More preferably, monomer (ii) has from 4 to 13 carbon atoms, and still more preferably has from 4 to 8 carbon atoms. Examples of monomer (ii) include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, and butyl methacrylate. Methyl acrylate is the preferred monomer (ii).
  • Monomer (iii) can comprise any carboxylic acid and is preferably an ⁇ ,j8-ethylenically unsaturated carboxylic acid such as those discussed above with respect to the esters of monomer (ii).
  • carboxylic acids include acrylic acid and methacrylic acid.
  • the combined ester and acid content in the terpolymer is in the range of 5 to 25% by weight and more preferably in the range of 10 to 20% by weight.
  • terpolymers examples include terpolymers comprising from about 70 to 95% by weight of polymerized ethylene from about 2.5 to about 27.5 % by weight polymerized C, to C l9 , preferably, C t to C 5 , alkyl acrylate or methacrylate and about 2.5 to 27.5% by weight of polymerized acrylic acid or methacrylic acid.
  • Exemplary terpolymers include ethylene-methyl acrylate-acrylic acid terpolymers, ethylene-methyl methacrylate-acrylic acid terpolymers, ethylene-methyl acrylate-methacrylic acid terpolymers, ethylene-ethyl acrylate-acrylic acid terpolymers, and ethylene-propylene-methyl acrylate- acrylic acid terpolymer. Ethylene-methyl acrylate-acrylic acid terpolymers are preferred.
  • the ethylene polymers may comprise a wide range of melt indices generally between about 0.1 and 1000, more preferably about 1 to about 500 and still more preferably about 2.5 to about 10 g/lOmin.
  • the ethylene terpolymers employed within the present invention may be produced by a technique recognized within the art, for example, free radical initiated processes such as those described within U.S. Patent 3,350,372 which is incorporated herein by reference in its entirety for all purposes.
  • free radical initiated processes such as those described within U.S. Patent 3,350,372 which is incorporated herein by reference in its entirety for all purposes.
  • such processes involve introducing ethylene, the ester, e.g., methyl acrylate, and the carboxylic acid into a high pressure reactor along with any one of a number of recognized free radical polymerization initiators, i.e., catalysts, suitable for producing the desired polymer.
  • the process of the present invention comprises a neutralization of the terpolymer with an inorganic metal-containing base so as to convert at least a portion of the acid structural units to an inorganic metal salt thereof.
  • the inorganic metal-containing base comprises a metal present in a solvent.
  • the metal can comprise any metal which is capable of being effectively employed in a neutralization reaction so as to convert at least a portion of the acid functionality to a metal salt thereof.
  • Suitable metals include Group IA metals, Group IIA metals, and transition metals. Specific examples of suitable metals include lithium, sodium, potassium, rubidium, cesium, calcium, magnesium, zinc, titanium, cobalt, nickel, and copper.
  • the solvent can be any solvent which does not prevent this neutralization reaction from occurring.
  • One suitable solvent is water.
  • the base comprises an aqueous solution of an oxide of the Group IA and/or a hydroxide of the Group IA or Group IIA metals and in particular, the Group IA metals, discussed above.
  • Specific examples of preferred Group IA and Group IIA hydroxides include LiOH, KOH, RbOH, CsOH, Mg(OH) 2 , Ca(OH) 2 , Sr(OH) 2 and Ba(OH) 2 with solutions of sodium hydroxide, lithium hydroxide, and potassium hydroxide being more preferred.
  • the hydroxide is present within an aqueous solution at a concentration of from about 1 to about 50 weight % , preferably, about 5 to about 20 weight % .
  • the neutralization reaction can occur under conditions which are effective in order to provide the conversion of at least a portion of the acid functionality to a metal salt thereof.
  • the temperature should be sufficient to melt and process the terpolymer, e.g., provide effective mixing the balance of components, it can also be relatively mild, e.g., less than about 100°C.
  • the process of the present invention can provide for the partial neutralization of the terpolymer, i.e., only a portion of the acid structural units are neutralized.
  • the product in such a process is a quaternary polymer having four functionalities, e.g., the ethylene, the ester, the carboxylate salt and the carboxylic acid.
  • the process of the present invention can provide for the complete neutralization, i.e., substantially all, if not all, of the acid functionalities are converted into metal salts.
  • the product of such a process will be a terpolymer having three functionalities, i.e., the ethylene backbone, the ester, and the ionic metal-neutralized carboxylic acid.
  • the process of the present invention can occur under batch or continuous reaction environments in any suitable reactor vessel. Typical batch reactors include autoclaves while typical continuous reactors include at least one extruding vessel, e.g., at least one reactive extruder. Preferably, the reaction is preformed continuously in a reactive extruder.
  • a reactive extruder which is useful in producing compositions of this invention comprises an extruder having a terpolymer feed section, one or more reaction sections, a subsequent devolatilization section, and an extrusion section. Typically, these sections are separately jacketed to allow for heating or cooling within each section. These sections can also be vented with one or more vent ports per section to allow the escape of volatile components.
  • the reactive extruder will also have optional means for introducing reactants into any reaction sections as well as means for mixing components in the reaction section(s) and means for conveying the components through the extruder.
  • the means for mixing and conveying components to be reacted are screws.
  • Reactive extruders can have a single screw or multiple screws. Each screw typically has a central shaft with a key-way or spline upon which mixing elements are secured.
  • the reactive extruder may have either co- rotating or counter-rotating screws.
  • a suitable reactive extruder is a Werner and Pfleiderer corrosion resistant ZSK-40 mm twin screw extruder.
  • the process provides a heretofore unrecognized technique for providing a desired product in a more efficient and flexible manner.
  • the ionomer produced by the inventive process has a number of advantages over those produced by typical saponification reactions. For example, because such ionomers can be produced under less severe processing conditions, e.g., lower temperatures, they can be subjected to less degradation and discoloration.
  • the process of the present invention provides not only for these improved terpolymers but is also capable of providing tetrapolymers. That is, the process is capable of providing for partial neutralization of the acid groups and therefore an ionomer which contains not only the ester groups but also the acid group, which ionomer can have enhanced processability.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

Cette invention se rapporte à un procédé servant à produire des ionomères contenant des unités structurelles à insaturation éthylénique, ce procédé consistant à mettre en contact: (a) un terpolymère contenant des unités structurelles produites à partir: (i) d'au moins une α-oléfine ayant 2 à 8 atomes de carbone; (ii) au moins un ester d'acides carboxyliques à insaturation alpha, bêta-éthylénique; et (iii) d'au moins un acide carboxylique; avec (b) une base contenant un métal inorganique dans des conditions propres à convertir au moins une partie des fonctions acides en sels de métal inorganique de ces fonctions.
PCT/US1997/008937 1997-05-19 1997-05-19 Procede de production d'ionomeres au moyen de terpolymeres d'ethylene WO1998052981A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1997/008937 WO1998052981A1 (fr) 1997-05-19 1997-05-19 Procede de production d'ionomeres au moyen de terpolymeres d'ethylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1997/008937 WO1998052981A1 (fr) 1997-05-19 1997-05-19 Procede de production d'ionomeres au moyen de terpolymeres d'ethylene

Publications (1)

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WO1998052981A1 true WO1998052981A1 (fr) 1998-11-26

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7335424B2 (en) 2001-03-29 2008-02-26 Exxonmobil Chemical Patents Inc. Ionomer laminates and articles formed from ionomer laminates
US7405008B2 (en) 2001-03-29 2008-07-29 Exxonmobil Chemical Patents Inc. Ionomer laminates and articles formed from ionomer laminates
US7479327B2 (en) 2003-05-27 2009-01-20 Exxonmobil Chemical Patents Inc. Tie-layer materials for use with ionomer-based films and sheets as skins on other materials
US7544420B2 (en) 2003-05-27 2009-06-09 Exxonmobil Chemical Patents Inc. Backing layers and substrates for articles formed from ionomer laminates
US8076000B2 (en) 2003-05-27 2011-12-13 Exxonmobil Chemical Patents Inc. Tie-layer materials for use with ionomer-based films and sheets as skins on other materials
WO2013016398A1 (fr) 2011-07-28 2013-01-31 Dow Global Technologies Llc Formulations de mélange polymère appropriées pour applications de cuir synthétique
US8404773B2 (en) 2008-03-17 2013-03-26 Dow Global Technologies Llc Coating composition, method of producing the same, articles made therefrom, and method of making such articles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4990574A (en) * 1988-03-02 1991-02-05 Sumitomo Rubber Industries, Ltd. Process for production of modified resin
US5320905A (en) * 1985-09-16 1994-06-14 The Dow Chemical Company Ionomers of ethylene/carboxylic acid copolymers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5320905A (en) * 1985-09-16 1994-06-14 The Dow Chemical Company Ionomers of ethylene/carboxylic acid copolymers
US4990574A (en) * 1988-03-02 1991-02-05 Sumitomo Rubber Industries, Ltd. Process for production of modified resin

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7335424B2 (en) 2001-03-29 2008-02-26 Exxonmobil Chemical Patents Inc. Ionomer laminates and articles formed from ionomer laminates
US7405008B2 (en) 2001-03-29 2008-07-29 Exxonmobil Chemical Patents Inc. Ionomer laminates and articles formed from ionomer laminates
US7479327B2 (en) 2003-05-27 2009-01-20 Exxonmobil Chemical Patents Inc. Tie-layer materials for use with ionomer-based films and sheets as skins on other materials
US7544420B2 (en) 2003-05-27 2009-06-09 Exxonmobil Chemical Patents Inc. Backing layers and substrates for articles formed from ionomer laminates
US8076000B2 (en) 2003-05-27 2011-12-13 Exxonmobil Chemical Patents Inc. Tie-layer materials for use with ionomer-based films and sheets as skins on other materials
US8404773B2 (en) 2008-03-17 2013-03-26 Dow Global Technologies Llc Coating composition, method of producing the same, articles made therefrom, and method of making such articles
US8546477B2 (en) 2008-03-17 2013-10-01 Dow Global Technologies Llc Coating composition, method of producing the same, articles made therefrom, and method of making such articles
WO2013016398A1 (fr) 2011-07-28 2013-01-31 Dow Global Technologies Llc Formulations de mélange polymère appropriées pour applications de cuir synthétique
US9605377B2 (en) 2011-07-28 2017-03-28 Dow Global Technologies Llc Polymeric blend formulations suitable for synthetic leather applications

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