US3864433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cured Rubber composition Compising EPR or EPDM and a Fluorine Containing Ethylenepolymer
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1974-04-22
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Granted: 1975-02-04
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Expires: 1994-04-22
Abstract
Abstract A cured rubber composition, which is obtained by curing a composition consisting essentially of an amorphous ethylenepropylene rubber and a fluorine-containing ethylene polymer with an organic peroxide as a curing agent. The cured rubber composition is excellent in heat, chemical, oil and solvent resistance, and hence can be used portions where the convertional ethylene-propylene rubber have not been usable.
Inventors
- 👤 Yoshiharu Tatsukami
- 👤 Takashi Futami
- 👤 Yasuhiro Oda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:29
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K5/00; C08K5/04; C08K5/14; C08L23/04; C08L23/08; C08L27/00; C08L27/02; C08L27/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
70 words
A cured rubber composition prepared by curing, with an organic peroxide as a curing agent, a composition consisting essentially of (A) 95 to 5 parts by weight of an amorphous ethylene-propylene and rubber and (B) 5 to 95 parts by weight of a fluorine-containing ethylene polymer selected from the group consisting of ethylene-hexafluoropropene copolymer and ethylene-hexafluoropropene-ethylenically unsaturated monomer terpolymer, said copolymer or terpolymer containing 10 to 50 mole% of hexafluoropropene.
Claim 2
Dependent Claim
70 words
A cured rubber composition prepared by curing, with an organic peroxide as a curing agent, a composition consisting essentially of (A) 95 to 5 parts by weight of an amorphous ethylene-propylene and rubber and (B) 5 to 95 parts by weight of a fluorine-containing ethylene polymer selected from the group consisting of ethylene-hexafluoropropene copolymer and ethylene-hexafluoropropene-ethylenically unsaturated monomer terpolymer, said copolymer or terpolymer containing 10 to 50 mole% of hexafluoropropene.
Claim 3
Dependent Claim
17 words
A cured rubber composition according to claim 1, wherein the amorphous ethylene-propylene rubber is an ethylene-propylene copolymer.
Claim 4
Dependent Claim
21 words
A cured rubber composition according to claim 1, wherein the amorphous ethylene-propylene rubber is ethylene, propylene and a non-conjugated diene terpolymer.
Claim 5
Dependent Claim
32 words
A cured rubber composition according to claim 1, wherein the organic peroxide is added in a proportion of 0.1 to 10 parts by weight per 100 parts by weight of the composition.
Claim 6
Dependent Claim
21 words
A cured rubber composition according to claim 1, wherein the curing is carried out at a temperature of 120* to 200*C.
Claim 7
Dependent Claim
22 words
A cured rubber composition according to claim 1, wherein the curing is carried out under a pressure of 0.5 to 250 kg/cm2.
Claim 8
Dependent Claim
29 words
A cured rubber composition according to claim 1, wherein the organic peroxide is at least one member selected from the group consisting of compounds represented by the general formula,
Claim 9
Dependent Claim
23 words
A cured rubber composition according to claim 7, wherein the organic peroxide is t-butylcumyl peroxide, dicumyl peroxide, decanoylperoxide, benzoyl peroxide or t-butyl peroxybenzoate.
Claim 10
Dependent Claim
19 words
A cured rubber composition according to claim 3, wherein the non-conjugated diene is 1,4-hexadiene, dicyclopentadiene, 5-methylene-2-norbornene, 5-ethylidene-2-horbornene or 4,7,8,9-tetrahydroindene.
Claim 11
Dependent Claim
16 words
A cured rubber composition according to claim 7, wherein the non-conjugated diene is dicylopentadiene or 5-ethylidene-2-norbornene.
Claim 12
Dependent Claim
33 words
A cured rubber composition according to claim 1, wherein a proportion of ethylene and propylene in the amorphous ethylene-propylene rubber is 50 to 80 mole % and 50 to 20 mole %, respectively.
Claim 13
Dependent Claim
26 words
A cured rubber composition according to claim 1, wherein a proportion of the non-conjugated diene in the amorphous ethylene-propylene rubber is 0.1 to 10 mole %.
Claim 14
Dependent Claim
36 words
A cured rubber composition according to claim 1, wherein the ethylenically unsaturated monomer in the fluorine-containing ethylene copolymer is methyl and ethyl acrylates and methacrylates, vinyl chloride, vinyl fluoride, vinylidene chloride, vinylidene fluoride, tetrafluoroethylene or trifluorochloroethylene.
Claim 15
Dependent Claim
26 words
A cured rubber composition according to claim 1, wherein a proportion of ethylenically unsaturated monomer in the fluorine-containing ethylene polymer is 0 to 50 mole %.
Claim 16
Dependent Claim
15 words
A cured rubber composition according to claim 1, wherein the composition is incorporated with additives.
Claim 17
Dependent Claim
19 words
A cured rubber composition according to claim 15, wherein the additives are acid acceptors, inorganic fillers and curing promotors.
References Cited (Backward Citations)
US3651176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |