WO2007015278A1 - Thermoplastic moulded insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles - Google Patents
Thermoplastic moulded insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles Download PDFInfo
- Publication number
- WO2007015278A1 WO2007015278A1 PCT/IT2005/000770 IT2005000770W WO2007015278A1 WO 2007015278 A1 WO2007015278 A1 WO 2007015278A1 IT 2005000770 W IT2005000770 W IT 2005000770W WO 2007015278 A1 WO2007015278 A1 WO 2007015278A1
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- WIPO (PCT)
- Prior art keywords
- insert
- parts
- type
- equivalent
- elastomer
- Prior art date
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- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 6
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 5
- 239000000463 material Substances 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 11
- 239000000806 elastomer Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000005062 Polybutadiene Substances 0.000 claims description 9
- 229920002857 polybutadiene Polymers 0.000 claims description 9
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012815 thermoplastic material Substances 0.000 claims description 7
- 241000723420 Celtis Species 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 6
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 5
- 229920002633 Kraton (polymer) Polymers 0.000 claims description 4
- 239000002480 mineral oil Substances 0.000 claims description 4
- 235000010446 mineral oil Nutrition 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229920002742 polystyrene-block-poly(ethylene/propylene) -block-polystyrene Polymers 0.000 claims description 3
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 229920003051 synthetic elastomer Polymers 0.000 claims description 3
- 239000005061 synthetic rubber Substances 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 239000004708 Very-low-density polyethylene Substances 0.000 claims description 2
- 230000000703 anti-shock Effects 0.000 claims description 2
- 229920001400 block copolymer Polymers 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 229920001903 high density polyethylene Polymers 0.000 claims description 2
- 239000004700 high-density polyethylene Substances 0.000 claims description 2
- 229920001684 low density polyethylene Polymers 0.000 claims description 2
- 239000004702 low-density polyethylene Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000004848 polyfunctional curative Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229920001866 very low density polyethylene Polymers 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 4
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- 239000005662 Paraffin oil Substances 0.000 claims 1
- 239000005038 ethylene vinyl acetate Substances 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 150000002430 hydrocarbons Chemical class 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 239000004005 microsphere Substances 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- 239000004014 plasticizer Substances 0.000 claims 1
- 239000003981 vehicle Substances 0.000 claims 1
- 229920002554 vinyl polymer Polymers 0.000 claims 1
- 229920001221 xylan Polymers 0.000 claims 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 1
- 239000004156 Azodicarbonamide Substances 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 1
- 235000019399 azodicarbonamide Nutrition 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical class [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/04—Resilient fillings for rubber tyres; Filling tyres therewith
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
- B60C17/065—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient made-up of foam inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
- B60C7/101—Tyre casings enclosing a distinct core, e.g. foam
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/01—Hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
Definitions
- Thermoplastic moulded insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles.
- thermoplastic moulded insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles.
- the said insert may be configured as a bar or loop with suitable dimensions.
- Scientific literature refers to the fabrication of more or less elastic materials used in bicycles, motorcycles and vehicles in general, to replace the inner tube or the inner tube-tyre system, thus eliminating the risk of punctures, explosions or other similar inconveniences.
- These materials are produced by extrusion or injection and offered with different lengths and cross-sections, for instance cylindrical, oval, trapezoidal, etc. (the cylindrical cross-section being the most used one), obtained from extrusion of vulcanized and suitably expanded elastomers.
- the most used elastomers are derived from natural rubbers or synthetic rubbers based on styrene butadiene copolymers SBr, ethylene- propylene-diene terpolymers EPDM (i.e. cyclopentadiene, dicyclopentadiene, ethenedyl norbomene etc.), ethylene-propylene copolymers EP, polyisoprene NR, polycloroprene, butene diene copolymers (isoprene or other dienic monomer) and other vulcanizable polymers in general.
- EPDM i.e. cyclopentadiene, dicyclopentadiene, ethenedyl norbomene etc.
- EP ethylene-propylene copolymers
- polyisoprene NR polycloroprene
- butene diene copolymers isoprene or other dienic monomer
- other vulcanizable polymers in general.
- Last, but not least, waste materials are not recycled during production or at the end of the product life cycle.
- a system has been devised and implemented, being exclusively based on a set of thermoplastic materials, easy to reticulate (if necessary for specific applications), capable of satisfying all the production requirements of low density products used to replace the inner tube of bicycles, motorcycles and light vehicles in general.
- a single compound may be sufficient to solve the problem, however in general the combination of different materials, provided with specific characteristics in terms of softness, spring back, at high and low temperatures, permits to obtain products with excellent performances also in terms of comfort and dimensional invariance.
- the compounds of the present invention are based on the use of syndiotactic polybutadiene 1-2 homopolymer, in conjunction with block copolymers SBS, SIS, SEBS, SEPS etc., being plasticized and hardened, if necessary with polyethylene, of any type, LDPE, HDPE, LLDPE, VLDPE etc. or with polypropylene, polystyrene, both crystal and anti-shock or other compatible hardeners, such as EVA, EMA, EBA and similar products.
- block copolymers SBS, SIS, SEBS, SEPS etc. being plasticized and hardened, if necessary with polyethylene, of any type, LDPE, HDPE, LLDPE, VLDPE etc. or with polypropylene, polystyrene, both crystal and anti-shock or other compatible hardeners, such as EVA, EMA, EBA and similar products.
- the compound is expanded with special swelling agents of micro- cellular type, which reduce product density to the desired weight levels and ensure suitable resistance to compression and deformation beyond 60° C use temperature.
- the swelling agents may be a chemical product that decomposes in working conditions, generating gases that remain trapped in the finished product, thus reducing its density.
- These products may decompose with esothermal process (i.e. AZDC, azodicarbonamide) or endothermal process (i.e. citric acid or tartaric acid and sodium bicarbonate) in suitable concentration to achieve the desired density.
- esothermal process i.e. AZDC, azodicarbonamide
- endothermal process i.e. citric acid or tartaric acid and sodium bicarbonate
- a base compound with medium high hardness (higher than 60 shore A), can be associated by stratification with materials having lower hardness and higher spring back properties, which confer elasticity properties that are complementary to the base material.
- micro-cellular master (092 MB 120 by AKZO Nobel or equivalent, including in powder form).
- the material extruded at 160° C at 5 m/min speed has the following characteristics: density 0.4 g/cm 3 , hardness of expanded material 65 shore A, compression set at 60724 h, 50%.
- EXAMPLE 2 Combination of two layers of materials suitable for fabrication of products used to replace inner tubes. High hardness layer placed in the area adjacent to the rim.
- the combination of the two materials is obtained by extrusion at 160° C, 5 m/min speed.
- thermoplastic material may be combined with a reticulating agent during production, to originate a completely or partially vulcanized product, in normal working conditions.
- the crosslinking agent is of radicalic type, like dicumilperoxide, also in combination with a family of well known vinyl silane derivatives.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention refers to a thermoplastic moulded insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles.
Description
Thermoplastic moulded insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles.
The present patent application refers to a thermoplastic moulded insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles.
The said insert may be configured as a bar or loop with suitable dimensions.
Scientific literature refers to the fabrication of more or less elastic materials used in bicycles, motorcycles and vehicles in general, to replace the inner tube or the inner tube-tyre system, thus eliminating the risk of punctures, explosions or other similar inconveniences. These materials are produced by extrusion or injection and offered with different lengths and cross-sections, for instance cylindrical, oval, trapezoidal, etc. (the cylindrical cross-section being the most used one), obtained from extrusion of vulcanized and suitably expanded elastomers.
The most used elastomers are derived from natural rubbers or synthetic rubbers based on styrene butadiene copolymers SBr, ethylene- propylene-diene terpolymers EPDM (i.e. cyclopentadiene, dicyclopentadiene, ethenedyl norbomene etc.), ethylene-propylene copolymers EP, polyisoprene NR, polycloroprene, butene diene copolymers (isoprene or other dienic monomer) and other vulcanizable polymers in general. These products have not been successful on the market due to a series of reasons and inconveniences related to the industrial productions of the bars used in replacement of tyre inner tubes. In fact, extrusion, vulcanization and expansion of elastomers is a delicate operation due to difficulties in obtaining the correct level of hardness, density and constant characteristics, in addition to use at low temperatures.
In addition to the aforementioned difficulties in the production of expanded reticular materials, it is almost impossible to obtain combinations of
materials with different characteristics in terms of hardness, spring back and density in order to obtain the desired results with regards to performance and comfort.
Moreover, combinations between layers of vulcanized materials with layers of thermoplastic materials are very difficult and the use of adhesives has not solved the said problems.
Last, but not least, waste materials are not recycled during production or at the end of the product life cycle.
In order to overcome the aforementioned disadvantages, including the combination of different materials, a system has been devised and implemented, being exclusively based on a set of thermoplastic materials, easy to reticulate (if necessary for specific applications), capable of satisfying all the production requirements of low density products used to replace the inner tube of bicycles, motorcycles and light vehicles in general. For some applications, a single compound may be sufficient to solve the problem, however in general the combination of different materials, provided with specific characteristics in terms of softness, spring back, at high and low temperatures, permits to obtain products with excellent performances also in terms of comfort and dimensional invariance. The compounds of the present invention are based on the use of syndiotactic polybutadiene 1-2 homopolymer, in conjunction with block copolymers SBS, SIS, SEBS, SEPS etc., being plasticized and hardened, if necessary with polyethylene, of any type, LDPE, HDPE, LLDPE, VLDPE etc. or with polypropylene, polystyrene, both crystal and anti-shock or other compatible hardeners, such as EVA, EMA, EBA and similar products.
The compound is expanded with special swelling agents of micro- cellular type, which reduce product density to the desired weight levels and ensure suitable resistance to compression and deformation beyond 60° C use temperature. The swelling agents may be a chemical product that decomposes in working conditions, generating gases that remain trapped in the finished product, thus reducing its density.
These products may decompose with esothermal process (i.e. AZDC, azodicarbonamide) or endothermal process (i.e. citric acid or tartaric acid and sodium bicarbonate) in suitable concentration to achieve the desired density.
These compounds can be produced and used for applications designed for use of a single body, that is to say not requiring the aid of other soft components to be stratified during moulding.
In any case, and in general, a base compound, with medium high hardness (higher than 60 shore A), can be associated by stratification with materials having lower hardness and higher spring back properties, which confer elasticity properties that are complementary to the base material. EXAMPLE 1
Compound with 70 shore A hardness, used as single component in integral replacement of inner tube
♦ 100 parts of syndiotactict polybutadiene 1-2 (RB
830 by Japan Synthetic Rubber or equivalent).
♦ 10 parts of LLDPE (LL 6201 XR by EXXON Mobil or equivalent).
♦ 25 parts of SEBS (KG 1652 by KRATON or equivalent)
♦ 15 parts of plastifying oil (Celtis 902 by AGIP or equivalent).
♦ 7 part of micro-cellular master (092 MB 120 by AKZO Nobel or equivalent, including in powder form).
The material extruded at 160° C at 5 m/min speed has the following characteristics: density 0.4 g/cm3, hardness of expanded material 65 shore A, compression set at 60724 h, 50%. EXAMPLE 2 Combination of two layers of materials suitable for fabrication of products used to replace inner tubes. High hardness layer placed in the area adjacent to the rim.
♦ -100 parts of syndiotactict polybutadiene 1-2 (type RB 840 by JSR). ♦ -20 parts of LLDPE.
♦ -20 parts of SEBS type KG 1652 (KRATON).
♦ -20 parts of mineral oil type Celtis 902.
♦ -7 parts of micro-cellular expanding agent. Hardness of expanded material is 70 shore A
Low hardness layer placed in contact with tyre and adjacent to ground. ♦ 25 parts of syndiotactic polybutadiene 1-2.
♦ 45 parts of SBS (type 161 B by Polimeri Europa or equivalent).
♦ 50 parts of SEBS type KG1652.
♦ 80 parts of mineral oil type Celtis 902 (AGIP or equivalent).
♦ 4 parts of micro-cellular expanding master, only when an expanded product is desired.
Hardness 40 shore A.
The combination of the two materials is obtained by extrusion at 160° C, 5 m/min speed.
Density 0.40 g/cm3, compression set at 60724 h, 40%. Finally, the said thermoplastic material may be combined with a reticulating agent during production, to originate a completely or partially vulcanized product, in normal working conditions.
The crosslinking agent is of radicalic type, like dicumilperoxide, also in combination with a family of well known vinyl silane derivatives.
Claims
Claims
1) Insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles, characterised in that it is made of thermoplastic materials.
2) Insert as defined in claim 1 , characterised in that the thermoplastic element of the said thermoplastic materials is an elastomer or mixtures of elastomers.
3) Insert as defined in claim 2, characterised in that the said elastomer is composed of syndiotactic polybutadiene 1-2, with tacticity higher than 80%. 4)'lnsert as defined in claim 3, characterised in that the concentration of syndiotactic polybutadiene 1-2 ranges from 10 to 90%.
5) Insert as defined in claim 2, characterised in that the said elastomer is composed of block copolymers of SBS, SIS, SEBS, SEPS, and EP type.
6) Insert as defined in claim 5, characterised in that the said elastomer is composed of SBS, SIS, SEBS, SEPS and EP with concentration ranging from 0 to 60%.
7) Insert as defined in claim 2, characterised in that the said elastomer is a mixture of the materials mentioned in claims 3 and 5.
8) Insert as defined in any of the preceding claims, characterised in that a plasticizer consisting in a mineral paraffin oil with concentration ranging from 0 and 40% is added to the thermoplastic materials.
9) Insert as defined in any of the preceding claims, characterised in that the said elastomer is hardened with polyethylene (LDPE, LLDPE, VLDPE, HDPE), copolymers and/or ethylene-vinyl acetate (EVA) and/or isotactic polypropylene and/or crystal or anti-shock polystyrene or other compatible hardeners with concentration from 0 to 50%.
10) Insert as defined in any of the preceding claims, characterised in that a micro-cellular expanding agent, composed of a thermoplastic polymer membrane, containing a swelling agent, generally a low molecular weight hydrocarbon, capable of producing gas in extrusion or moulding conditions,
forming a microsphere with dimensions from 20 to 300 microns, is added to the said elastomer.
11) Insert as defined in claim 10, characterised in that the said expander comprises an agent, in master or powder form, that can expand in the temperature range suitable to material extrusion or moulding, it being provided that the expander has a concentration ranging from 0 to 20%.
12) Insert as defined in claim 10, characterised in that the expander is a chemical product that decomposes in working conditions, generating gases that remain trapped in the finished product, thus reducing the product density. 13) Insert as defined in claim 10, characterised in that the said expander is a mixture of the expanders mentioned in claims 11 and 12. 14) Insert as defined in claim 1 , characterised in that the said thermoplastic material is combined with a reticulating agent during production, to originate a completely or partially vulcanized product, in normal working conditions. 15) Insert as defined in claim 14, characterised in that the said agent is of radicalic nature also in combination with vinyl xylan aids of known type.
16) Insert as defined in the preceding claims, characterised in that it is composed of a compound with hardness 70 shore A, with the following composition: - 100 parts of syndiotactic polybutadiene 1-2 (type RB 830 by Japan
Synthetic Rubber, or equivalent).
-10 parts of LLDPE (type LL 6201 XR by EXXON Mobil, or equivalent).
-25 parts of SEBS (type KG 1652 by KRATON, or equivalent)
- 15 parts of plastifying oil (Celtis 902 by AGIP or equivalent). - 7 part of micro-cellular master (092 MB 120 by AKZO Nobel or equivalent, including in powder form).
17) Insert as defined in claims 1 to 15, characterised in that it is composed of two layers:
High hardness layer, to be positioned in the area adjacent to the rim. -100 parts of syndiotactic polybutadiene 1 -2 (type RB 840 by JSR). -20 parts of LLDPE. -20 parts of SEBS type KG 1652 (KRATON).
-20 parts of mineral oil type Celtis 902.
-7 parts of micro-cellular expanding agent.
Hardness of expanded material is 70 shore A
Low hardness layer placed in contact with tyre and adjacent to ground. -25 parts of syndiotactic polybutadiene 1-2.
-45 parts of SBS (type 161 B by Polimeri Europa or equivalent).
-50 parts of SEBS type KG1652.
-80 parts of mineral oil type Celtis 902 (AGIP or equivalent).
-4 parts of micro-cellular expanding master, only when an expanded product is desired.
Hardness 40 shore A.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000078A ITMC20050078A1 (en) | 2005-08-03 | 2005-08-03 | ELASTOMERIC MATERIAL SUITABLE FOR THE PRODUCTION OF REPLACEMENT BARS OF AIRBUSES FOR CYCLES, MOTORCYCLES AND LIGHT VEHICLES |
| ITMC2005A000078 | 2005-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007015278A1 true WO2007015278A1 (en) | 2007-02-08 |
Family
ID=36010922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT2005/000770 WO2007015278A1 (en) | 2005-08-03 | 2005-12-28 | Thermoplastic moulded insert designed to completely fill the inner tube of tyres for bicycles, motorcycles and light vehicles |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1891745A (en) |
| IT (1) | ITMC20050078A1 (en) |
| WO (1) | WO2007015278A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017113220A (en) * | 2015-12-24 | 2017-06-29 | ブリヂストンスポーツ株式会社 | Resin composition for golf ball and golf ball |
| US10792956B2 (en) | 2013-03-15 | 2020-10-06 | Bridgestone Americas Tire Operations, Llc | Light-weight inner tube and related methods |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101112851B (en) * | 2007-08-10 | 2011-04-20 | 王守谦 | Anti-pricking anti-shrinking inflaming-retarding solid tyre and method for making the same |
| CN102993620A (en) * | 2012-12-12 | 2013-03-27 | 天长市兴泰精细化工厂 | High-molecular rubber material and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3915774A (en) * | 1974-02-04 | 1975-10-28 | Goodyear Tire & Rubber | Method of building a non-deflatable tire |
| GB2013143A (en) * | 1978-01-25 | 1979-08-08 | Uniroyal Inc | Run-Flat Tire and Wheel Assembly |
| EP0441552A2 (en) * | 1990-02-05 | 1991-08-14 | Sumitomo Rubber Industries Limited | Tyre and rim assembly for motorcycles |
| US5753365A (en) * | 1991-06-07 | 1998-05-19 | Bridgestone Corporation | Rubber composition and all season type pneumatic tires made from a rubber composition |
| US5840632A (en) * | 1996-09-30 | 1998-11-24 | Hitech Polymers Inc. | Removal of organic contaminants using polymeric sheets, films, strands and filaments |
| US20010042580A1 (en) * | 2000-02-04 | 2001-11-22 | Bridgestone Corporation | Tires |
| EP1241219A1 (en) * | 2001-03-13 | 2002-09-18 | The Goodyear Tire & Rubber Company | Pneumatic tire having a rubber component containing a rubber gel, a syndiotactic 1,2-Polybutadiene and an olefinically unsaturated rubber |
| WO2003095538A1 (en) * | 2002-04-19 | 2003-11-20 | Advanced Elastomer Systems, L.P. | Soft chemically foamed thermoplastic vulcanizate for sealing application by robotic extrusion |
| EP1375197A1 (en) * | 2001-03-21 | 2004-01-02 | Bridgestone Corporation | Assembly of tire and rim |
| EP1449868A1 (en) * | 2003-02-19 | 2004-08-25 | Nitto Denko Corporation | Composition for polyolefin resin foam and foam thereof, and method for producing foam |
-
2005
- 2005-08-03 IT IT000078A patent/ITMC20050078A1/en unknown
- 2005-12-28 WO PCT/IT2005/000770 patent/WO2007015278A1/en active Application Filing
-
2006
- 2006-08-02 CN CN200610103823.2A patent/CN1891745A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3915774A (en) * | 1974-02-04 | 1975-10-28 | Goodyear Tire & Rubber | Method of building a non-deflatable tire |
| GB2013143A (en) * | 1978-01-25 | 1979-08-08 | Uniroyal Inc | Run-Flat Tire and Wheel Assembly |
| EP0441552A2 (en) * | 1990-02-05 | 1991-08-14 | Sumitomo Rubber Industries Limited | Tyre and rim assembly for motorcycles |
| US5753365A (en) * | 1991-06-07 | 1998-05-19 | Bridgestone Corporation | Rubber composition and all season type pneumatic tires made from a rubber composition |
| US5840632A (en) * | 1996-09-30 | 1998-11-24 | Hitech Polymers Inc. | Removal of organic contaminants using polymeric sheets, films, strands and filaments |
| US20010042580A1 (en) * | 2000-02-04 | 2001-11-22 | Bridgestone Corporation | Tires |
| EP1241219A1 (en) * | 2001-03-13 | 2002-09-18 | The Goodyear Tire & Rubber Company | Pneumatic tire having a rubber component containing a rubber gel, a syndiotactic 1,2-Polybutadiene and an olefinically unsaturated rubber |
| EP1375197A1 (en) * | 2001-03-21 | 2004-01-02 | Bridgestone Corporation | Assembly of tire and rim |
| WO2003095538A1 (en) * | 2002-04-19 | 2003-11-20 | Advanced Elastomer Systems, L.P. | Soft chemically foamed thermoplastic vulcanizate for sealing application by robotic extrusion |
| EP1449868A1 (en) * | 2003-02-19 | 2004-08-25 | Nitto Denko Corporation | Composition for polyolefin resin foam and foam thereof, and method for producing foam |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10792956B2 (en) | 2013-03-15 | 2020-10-06 | Bridgestone Americas Tire Operations, Llc | Light-weight inner tube and related methods |
| US11667154B2 (en) | 2013-03-15 | 2023-06-06 | Bridgestone Americas Tire Operations, Llc | Light-weight inner tube and related methods |
| JP2017113220A (en) * | 2015-12-24 | 2017-06-29 | ブリヂストンスポーツ株式会社 | Resin composition for golf ball and golf ball |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1891745A (en) | 2007-01-10 |
| ITMC20050078A1 (en) | 2005-11-02 |
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