US5910544A
Expired / Lapsed
US
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Thermoplastic elastomer composition and process for production thereof and low permeability hose using the same
Assignee: Yokohama Rubber Co Ltd
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Filing: 1996-11-01
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Granted: 1999-06-08
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Expires: 2016-11-01
Abstract
Abstract A thermoplastic elastomer composition comprising: i) from 15 to 80 parts by weight of a polyamide thermoplastic resin as component A; ii) from 20 to 85 parts by weight of a rubber composition as component B, the rubber composition containing a copolymer rubber composed of a copolymer of a C 4 to C 7 isomonoolefin and a p-alkylstyrene, where at least a part of the p-alkylstyrene unit portions thereof have a halogen atom; and iii) a cross-linking agent, wherein the thermoplastic resin component A forms a continuous phase and at least part of component B is dispersed in component A as a dispersed phase and at least part of the dispersed phase is cross-linked by the cross-linking agent.
Inventors
- 👤 Osamu Ozawa
- 👤 Tetsuji Kawazura
- 👤 Noriaki Kuroda
- 👤 Yoshihiro Aoyagi
- 👤 Jiro Watanabe
- 👤 Gou Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:00
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; B; B60; B60C; B60C1/00; B60C1/0008; B60C11/00; B60C11/03; B60C11/13; B60C11/1307; B60C11/1346; B60C13/00; B60C13/001; C08L23/18; C08L23/20; C08L23/22; C08L23/26; C08L23/28; C08L23/283; C08L101/00; C08L53/00; C08L77/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
115 words
A thermoplastic elastomer composition comprising: i) from 15 to 80 parts by weight of a polyamide thermoplastic resin as component A; ii) from 20 to 85 parts by weight of a rubber composition as component B, said rubber composition containing a copolymer rubber composed of a copolymer of a C 4 to C 7 isomonoolefin and a p-alkylstyrene, where at least a part of the p-alkylstyrene unit portions thereof have a halogen atom; and iii) a cross-linking agent, wherein component A forms a continuous phase and at least part of component B is dispersed in component A as a dispersed phase and at least part of the dispersed phase is cross-linked by the cross-linking agent.
Claim 2
Dependent Claim
115 words
A thermoplastic elastomer composition comprising: i) from 15 to 80 parts by weight of a polyamide thermoplastic resin as component A; ii) from 20 to 85 parts by weight of a rubber composition as component B, said rubber composition containing a copolymer rubber composed of a copolymer of a C 4 to C 7 isomonoolefin and a p-alkylstyrene, where at least a part of the p-alkylstyrene unit portions thereof have a halogen atom; and iii) a cross-linking agent, wherein component A forms a continuous phase and at least part of component B is dispersed in component A as a dispersed phase and at least part of the dispersed phase is cross-linked by the cross-linking agent.
Claim 3
Dependent Claim
39 words
A process for producing the thermoplastic elastomer composition of claim 1 comprising: mixing component A with component B at least at the melting temperature of component A, then adding the cross-linking agent during the mixing to cross-link component B.
Claim 4
Dependent Claim
37 words
A hose comprising an inner tube, a reinforcing layer, and an outer cover, wherein at least part of the inner tube and/or part of the outer cover is formed from the thermoplastic elastomer composition of claim 1.
Claim 5
Dependent Claim
58 words
The thermoplastic elastomer composition of claim 1, wherein component B has a p-alkylstyrene content of 5.5 to 25% by weight, a halogen content of at least 1.0% by weight, and a Mooney viscosity ML 1+8 (125° C.) of at least 30 and component A has a gas permeation coefficient of not more than 2 mg·mm/24 hr·cm 2 .
Claim 6
Dependent Claim
39 words
A low permeability hose comprising an inner tube, a reinforcing layer, and an outer cover wherein at least one of the inner tube and outer cover of the hose is formed from the thermoplastic elastomer composition of claim 4.
Claim 7
Dependent Claim
111 words
A thermoplastic elastomer composition of claim 1, wherein component A has an air permeation coefficient of not more than 25×10 -12 cc·cm/cm 2 ·sec·cmHg and component B has an air permeation coefficient of not more than 1.0×10 -10 cc·cm/cm 2 sec·cmHg, and wherein component A has a melt viscosity (η m ), and component B has a melt viscosity (η d ), and the difference in solubility parameters of component A and component B at a kneading temperature satisfy the following relationship (1): ##EQU6## where ΔSP is the difference in solubility parameters of component B and component A; Φ m is the volume fraction of component A; and a=-0.0518, and b=0.90.
Claim 8
Dependent Claim
110 words
The thermoplastic elastomer composition of claim 1, wherein component A has a gas permeation coefficient of not more than 5.0 mg·mm/24 hr·cm 2 and component B has a gas permeation coefficient of not more than 30.0 mg·mm/24 hr·cm 2 , and wherein component A has a melt viscosity (η m ), and component B has a melt viscosity (η d ), and the difference in solubility parameters of component A and component B at a kneading temperature satisfy the following relationship (1): ##EQU7## where ΔSP is the difference in solubility parameters of component B and component A; Φ m is the volume fraction of component A; and a=-0.0518, and b=0.90.
Claim 9
Dependent Claim
15 words
A hose containing the thermoplastic elastomer composition of claim 7 as a gas barrier layer.
Claim 10
Dependent Claim
47 words
A low permeability thermoplastic elastomer composition comprising the thermoplastic elastomer composition of claim 1 and a barrier thermoplastic resin composition, the thermoplastic elastomer composition having a phase structure wherein the barrier thermoplastic resin composition is dispersed in the form of a layer in the thermoplastic elastomer composition.
Claim 11
Dependent Claim
83 words
The low permeability thermoplastic elastomer composition of claim 9, wherein the thermoplastic resin component A forming the continuous phase has an air permeation coefficient of at least 5 cm 3 ·cm/cm 2 ·sec·cmHg or a HFC134a freon gas permeation coefficient of at least 5 mg·mm/24 hr·cm 2 and the barrier thermoplastic resin composition has an air permeation coefficient of not more than 5 cm 3 ·cm/cm 2 ·sec·cmHg or a HFC134a freon gas permeation coefficient of not more than 5 mg·mm/24hr·cm 2 .
Claim 12
Dependent Claim
131 words
The low permeability thermoplastic elastomer composition of claim 9 or 10 wherein the volume fraction and the melt viscosity of the thermoplastic elastomer composition comprising component A as the continuous phase and component B as the dispersed phase, and the barrier thermoplastic resin composition satisfy the following formula (2) and formula (3): ##EQU8## where, Φ d is the volume fraction of the barrier thermoplastic resin composition; η d is the melt viscosity of the barrier thermoplastic resin composition; Φ m is the volume fraction of the thermoplastic elastomer composition comprising component A as the continuous phase and component B as the dispersed phase; and η m is the melt viscosity of the thermoplastic elastomer composition comprising component A as the continuous phase and the rubber component B as the dispersed phase.
Claim 13
Dependent Claim
43 words
The low permeability thermoplastic elastomer composition of claim 9 or 10, wherein the barrier thermoplastic resin composition is at least one thermoplastic resin selected from the group consisting of polyamide thermoplastic resins, polyester thermoplastic resins, vinyl thermoplastic resins, and polyvinylidene chloride thermoplastic resins.
Claim 14
Dependent Claim
59 words
The low permeability thermoplastic elastomer composition of claim 9 or 10, wherein the layer of the barrier thermoplastic resin composition has a flatness, which is an aspect ratio A in the range of 10 to 500, where A=a/b and a is the length of the long axis and b is the length of the short axis of the layer.
Claim 15
Dependent Claim
46 words
A process for producing the low permeability thermoplastic elastomer composition of claim 9 comprising the steps of: preparing the thermoplastic elastomer composition of the component A and component B and then mixing the barrier thermoplastic resin composition with the thermoplastic elastomer composition as a second step.
Claim 16
Dependent Claim
33 words
A low permeability hose comprising an inner tube and an outer cover, wherein at least one of the inner tube and outer cover is formed from the composition of claim 9 or 10.
Claim 17
Dependent Claim
114 words
A functional thermoplastic elastomer composition comprising: the thermoplastic elastomer composition of claim 1 as component I, and an insoluble functional thermoplastic resin as component II blended into component I, said component II having a difference in solubility parameter (SP value) based upon component I of more than 1.0, where the following formula (4) is satisfied: ##EQU9## where, Φ A is the volume fraction of component I; Φ B is the volume fraction of component II; η A is the melt viscosity of component I; η B is the melt viscosity of component II; and the volume fraction of component II based on the total of components I and II is from 1 to 40%.
Claim 18
Dependent Claim
37 words
The functional thermoplastic elastomer composition of claim 16, where a solubilizing component III is further included in an amount of from 0.5 to 10% by weight based upon the total weight of component I and component II.
Claim 19
Dependent Claim
23 words
The functional thermoplastic elastomer composition of claim 16 or 17, wherein the insoluble functional thermoplastic resin component II is an adhesive thermoplastic resin.
Claim 20
Dependent Claim
62 words
A hose comprising an inner tube having an inner and an outer layer, an outer cover and a reinforcing layer adjoining the outer cover, where at least one member of the outer cover of the hose, the inner layer of the inner tube, the outer layer of the inner tube, and the reinforcing layer is formed from the composition of claim 18.
Claim 21
Dependent Claim
67 words
A process for producing the functional thermoplastic elastomer composition of claim 16 comprising the steps of: preparing the thermoplastic elastomer composition as component I, then mixing in the insoluble functional thermoplastic resin component II, and then processing the resultant mixture into a sheet or tube while applying shear stress so as to make the insoluble functional thermoplastic resin component II be positioned at a surface portion thereof.
References Cited (Backward Citations)
JPH01213357A
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JPH01135846A
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JPH05507303A
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JPH04108838A
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JPH04202247A
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US5591551A
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