US5206293A
Expired / Lapsed
US
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Rubber composition and crosslinkable rubber composition
Assignee: JSR Corp
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Filing: 1990-10-05
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Granted: 1993-04-27
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Expires: 2010-10-05
Abstract
Abstract A rubber composition obtained by subjecting a mixture of (I) 35-95 parts by weight of a fluoroelastomer, (II) 65-5 parts by weight of at least one member selected from the group consisting of polyethylene, ethylene-vinyl acetate copolymer and ethylene-unsaturated carboxylic acid ester copolymer, and an organic peroxide to reaction while imparting shearing deformation to the mixture. A crosslinkable rubber composition can be obtained by compounding the above rubber composition with a crosslinking agent for the fluoroelastomer (I). The above rubber composition is superior in processability, particularly extrusion-processability, sealing property, heat resistance, steam resistance and weather resistance.
Inventors
- 👤 Masato Sakai
- 👤 Isao Sugita
- 👤 Itsuki Umeda
- 👤 Yoji Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:34
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L27/00; C08L27/02; C08L27/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
A rubber composition obtained by subjecting a mixture of (I) 35-95 parts by weight of a fluoroelastomer, (II) 65-5 parts by weight of at least one member selected from the group consisting of polyethylene, ethylene-vinyl acetate copolymer and ethylene-unsaturated carboxylic acid ester copolymer, and (III) an organic peroxide to reaction while imparting shearing deformation to the mixture, wherein the total amount of component (I) plus component (II) is 100 parts by weight.
Claim 2
Dependent Claim
72 words
A rubber composition obtained by subjecting a mixture of (I) 35-95 parts by weight of a fluoroelastomer, (II) 65-5 parts by weight of at least one member selected from the group consisting of polyethylene, ethylene-vinyl acetate copolymer and ethylene-unsaturated carboxylic acid ester copolymer, and (III) an organic peroxide to reaction while imparting shearing deformation to the mixture, wherein the total amount of component (I) plus component (II) is 100 parts by weight.
Claim 3
Dependent Claim
33 words
The rubber composition according to claim 1, 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, α,α'-bis-(t-butylperoxy)-p-diisopropylbenzene, dicumyl peroxide, di-t-butyl peroxide, 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, 2,4-dichlorobenzoyl peroxide, benzoyl peroxide and p-chlorobenzoyl peroxide.
Claim 4
Dependent Claim
16 words
The rubber composition according to claim 1, wherein the organic peroxide is 5-dimethyl-2,5-di(t-butylperoxy)hexyne-3, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane or α,α'-bis(t-butylperoxy)-p-diisopropylbenzene.
Claim 5
Dependent Claim
33 words
The rubber composition according to claim 1, wherein the proportion of the organic peroxide is 0.01-5 parts by weight per 100 parts by weight of a total of component (I) plus component (II).
Claim 6
Dependent Claim
33 words
The rubber composition according to claim 1, wherein the proportion of the organic peroxide is 0.05-2 parts by weight per 100 parts by weight of a total of component (I) plus component (II).
Claim 7
Dependent Claim
54 words
The rubber composition according to claim 1, wherein the fluoroelastomer (I) is a (co)polymer of at least one fluorine-containing monomer selected from the group consisting of vinylidene fluoride, hexafluoropropylene, pentafluoropropylene, trifluoroethylene, trifluorochloroethylene, tetrafluoroethylene, vinyl fluoride, perfluoro(methyl vinyl ether) and perfluoro(propylvinylidene) or a rubber obtained by copolymerizing the fluorine-containing monomer with a monomer copolymerizable therewith.
Claim 8
Dependent Claim
32 words
The rubber composition according to claim 6, wherein the monomer copolymerizable with the fluorine-containing monomer is a vinyl compound, an olefin compound, a diene compound or a chlorine-, bromine- or iodine-containing compound.
Claim 9
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 10
Dependent Claim
22 words
The rubber composition according to claim 1, wherein the fluoroelastomer (I) has a Mooney viscosity (ML 1+4 , 100° C.) of 30-150.
Claim 11
Dependent Claim
25 words
The rubber composition according to claim 1, wherein the ethylene-unsaturated carboxylic acid ester copolymer is ethylene-methyl (meth)acrylate copolymer, ethylene-ethyl (meth)acrylate copolymer or ethylene-butyl (meth)acrylate copolymer.
Claim 12
Dependent Claim
24 words
The rubber composition according to claim 1, wherein said component (II) is ethylene-vinyl acetate copolymer having a vinyl acetate content of 5-45% by weight.
Claim 13
Dependent Claim
19 words
The rubber composition according to claim 1, wherein component (II) has a melt flow index of 0.5-150 g/10 min.
Claim 14
Dependent Claim
19 words
The rubber composition according to claim 1, wherein component (II) has a melt flow index of 1-40 g/10 min.
Claim 15
Dependent Claim
36 words
The rubber composition according to claim 1, wherein the weight ratio of component (I) to component (II) is 65-90/35-10 and wherein the total amount of the component (I) plus component (II) is 100 parts by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |