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US4931499A
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Rubber composition derived from fluoroelastomer and ethylene-alpha-olefin copolymer rubber and rubber article formed therefrom
Assignee: JSR Corp
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Filing: 1988-11-18
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Granted: 1990-06-05
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Expires: 2008-11-18
Abstract
Abstract A rubber composition obtained by subjecting a mixture of (I) 35-95 parts by weight of a fluoroelastomer and (II) 65-5 parts by weight of an ethylene-α-olefin copolymer rubber in which the total of the (I) component and the (II) component is 100 parts by weight and a crosslinking agent for the ethylene-α-olefin copolymer rubber (II) to reaction while imparting shearing deformation to the mixture. Said rubber composition is excellent in processability on roll and in extruder, heat resistance, steam resistance, weather resistance, compression set and resistance to compressive load. A rubber article is obtained by subjecting the above rubber composition and a crosslinking agent for the fluoroelastomer (I) and optionally at least one additive to reaction, said rubber article being excellent in heat resistance, weather resistance, compression set and resistance to compressive load and hence can be used in the fields of general industry, electric industry and chemical industry.
Inventors
- 👤 Masato Sakai
- 👤 Itsuki Umeda
- 👤 Yasuo Takeuchi
- 👤 Yasuhiko Takemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08L; C08L23/00; C08L23/02; C08L23/16; C08L27/00; C08L27/02; C08L27/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
63 words
A rubber composition obtained by subjecting a mixture of (I) 35-95 parts by weight of a fluoroelastomer and (II) 65-5 parts by weight of an ethylene-α-olefin copolymer rubber in which the total of the (I) component and the (II) component is 100 parts by weight and a crosslinking agent for the copolymer rubber (II) to reaction while imparting shearing deformation to the mixture.
Claim 2
Dependent Claim
63 words
A rubber composition obtained by subjecting a mixture of (I) 35-95 parts by weight of a fluoroelastomer and (II) 65-5 parts by weight of an ethylene-α-olefin copolymer rubber in which the total of the (I) component and the (II) component is 100 parts by weight and a crosslinking agent for the copolymer rubber (II) to reaction while imparting shearing deformation to the mixture.
Claim 3
Dependent Claim
15 words
The rubber composition according to claim 1, wherein the crosslinking agent is an organic peroxide.
Claim 4
Dependent Claim
21 words
The rubber composition according to claim 2, wherein the organic peroxide is selected from the group consisting of 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne-3,2,5-dimethyl-2,5-di(t-butylperoxy)hexane and α,α'-bis(t-butylperoxy)-p-diisopropylbenzene.
Claim 5
Dependent Claim
42 words
The rubber composition according to claim 1, 2 or 3, wherein the amount of the crosslinking agent is 0.01 to 5 parts by weight per 100 parts by weight of the mixture of the fluoroelastomer (I) and the ethylene-α-olefin copolymer rubber (II).
Claim 6
Dependent Claim
30 words
The rubber composition according to claim 1, wherein the fluoroelastomer (I) is selected from the group consisting of vinyl fluoride-hexafluoropropylene copolymer, vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene terpolymer, tetrafluoroethylene-propylene copolymer and tetrafluoroethylene-vinylidene fluoride-propylene terpolymer.
Claim 7
Dependent Claim
24 words
The rubber composition according to claim 1, wherein the fluoroelastomer (I) has a Mooney viscosity (ML 1+4 , 100° C.) of 30 to 150.
Claim 8
Dependent Claim
34 words
The rubber composition according to claim 1, wherein the ethylene-α-olefin copolymer rubber is a copolymer of ethylene with at least one α-olefin selected from the group consisting of propylene, butene-1, 4-methylpentene-1, hexene-1 and octene-1.
Claim 9
Dependent Claim
26 words
The rubber composition according to claim 1, wherein the ethylene-α-olefin copolymer rubber (II) has a Mooney viscosity (ML 1+4 , 100° C.) of 5 to 150.
Claim 10
Dependent Claim
48 words
The rubber composition according to claim 1, wherein the mixture consists of 65-90 parts by weight of the fluoroelastomer (I) and 35-10 parts by weight of the ethylene-α-olefin copolymer rubber (II) in which the total of the (I) component and the (II) component is 100 parts by weight.
Claim 11
Dependent Claim
88 words
A rubber article obtained by subjecting a mixture of (I) 35-95 parts by weight of a fluoroelastomer and (II) 65-5 parts by weight of an ethylene-α-olefin copolymer rubber in which the total of the (I) component and the (II) component is 100 parts by weight and a crosslinking agent for the ethylene-α-olefin copolymer rubber (II) to reaction while imparting shearing deformation to the mixture and then subjecting the rubber composition thus obtained and a crosslinking agent for the fluoroelastomer (I) and optionally at least one additive to reaction.
Claim 12
Dependent Claim
88 words
A rubber article obtained by subjecting a mixture of (I) 35-95 parts by weight of a fluoroelastomer and (II) 65-5 parts by weight of an ethylene-α-olefin copolymer rubber in which the total of the (I) component and the (II) component is 100 parts by weight and a crosslinking agent for the ethylene-α-olefin copolymer rubber (II) to reaction while imparting shearing deformation to the mixture and then subjecting the rubber composition thus obtained and a crosslinking agent for the fluoroelastomer (I) and optionally at least one additive to reaction.
Claim 13
Dependent Claim
43 words
The rubber article according to claim 10, wherein the additive is selected from the group consisting of reinforcing fillers, extenders, dispersing agents, plasticizers, softening agents, antioxidants, heat-resisting agents, coloring agents, ultraviolet ray-absorbing agents, flame retardants, oil resistance-improvers, foaming agents, anti-scorching agents and tackifiers.
Claim 14
Dependent Claim
19 words
The rubber article according to claim 10, wherein the crosslinking agent for the component (II) is an organic peroxide.
Claim 15
Dependent Claim
21 words
The rubber article according to claim 12, wherein the organic peroxide is selected from the group consisting of 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne-3,2,5-diethyl-2,5-di(t-butylperoxy)hexane and α,α'-bis(t-butylperoxy)-p-diisopropylbenzene.
Claim 16
Dependent Claim
46 words
The rubber article according to claim 10, 12 or 13, wherein the amount of the crosslinking agent for the component (II) is 0.01 to 5 parts by weight per 100 parts by weight of the mixture of the fluoroelastomer (I) and the ethylene-α-olefin copolymer rubber (II).
Claim 17
Dependent Claim
30 words
The rubber article according to claim 10, wherein the fluoroelastomer (I) is selected from the group consisting of vinyl fluoride-hexafluoropropylene copolymer, vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene terpolymer, tetrafluoroethylene-propylene copolymer and tetrafluoroethylene-vinylidene fluoride-propylene terpolymer.
Claim 18
Dependent Claim
24 words
The rubber article according to claim 10, wherein the fluoroelastomer (I) has a Mooney viscosity (ML 1+4 , 100° C.) of 30 to 150.
Claim 19
Dependent Claim
34 words
The rubber article according to claim 10, wherein the ethylene-α-olefin copolymer rubber is a copolymer of ethylene with at least one α-olefin selected from the group consisting of propylene, butene-1, 4-methylpentene-1, hexene-1 and octene-1.
Claim 20
Dependent Claim
26 words
The rubber article according to claim 10, wherein the ethylene-α-olefin copolymer rubber (II) has a Mooney viscosity (ML 1+4 , 100° C.) of 5 to 150.
Claim 21
Dependent Claim
48 words
The rubber article according to claim 10, wherein the mixture consists of 65-90 parts by weight of the fluoroelastomer (I) and 35-10 parts by weight of the ethylene-α-olefin copolymer rubber (II) in which the total of the (I) component and the (II) component is 100 parts by weight.
Claim 22
Dependent Claim
44 words
The rubber article according to claim 10, wherein the crosslinking agent for the fluoroelastomer (I) is a combination of an organic peroxide and a cross-linking co-agent, a combination of an aromatic dihydroxy crosslinker-type vulcanizing agent with a vulcanizing accelerator or an amine-type vulcanizing agent.
References Cited (Backward Citations)
US3562195A
Cited
JPS49133442A
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JPS53146752A
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JPS5493040A
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JPS55160037A
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JPS57135843A
Cited
JPS60206857A
Cited
JPS6234935A
Cited
JPS62121749A
Cited
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