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US4405756A
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Co-vulcanizable rubber composition
Assignee: Zeon Corp
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Filing: 1982-08-25
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Granted: 1983-09-20
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Expires: 2002-08-25
Abstract
Abstract A rubber composition co-vulcanizable with a sulfur cure system, said composition comprising (1) 95 to 20% by weight of a partially hydrogenated unsaturated nitrile-conjugated diene copolymer rubber in which at least 50% of units derived from the conjugated diene are hydrogenated, (2) 5 to 80% by weight of an ethylenepropylene-nonconjugated diene terpolymer rubber, and (3) a required amount of at least one vulcanization accelerator selected from the group of thiuram accelerators and dithiocarbamate accelerators.
Inventors
- 👤 Motofumi Oyama
- 👤 Kinro Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:30
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08L15/00; C08L15/005; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
A rubber composition co-vulcanizable with a sulfur cure system, said composition comprising (1) 95 to 20% by weight of a partially hydrogenated unsaturated nitrile-conjugated diene copolymer rubber in which at least 50% of units derived from the conjugated diene are hydrogenated. (2) 5 to 80% by weight of an ethylene-propylene-nonconjugated diene terpolymer rubber, and (3) a required amount of at least one vulcanization accelerator selected from the group of thiuram accelerators and dithiocarbamate accelerators.
Claim 2
Dependent Claim
74 words
A rubber composition co-vulcanizable with a sulfur cure system, said composition comprising (1) 95 to 20% by weight of a partially hydrogenated unsaturated nitrile-conjugated diene copolymer rubber in which at least 50% of units derived from the conjugated diene are hydrogenated. (2) 5 to 80% by weight of an ethylene-propylene-nonconjugated diene terpolymer rubber, and (3) a required amount of at least one vulcanization accelerator selected from the group of thiuram accelerators and dithiocarbamate accelerators.
Claim 3
Dependent Claim
33 words
The composition of claim 1 wherein the copolymer rubber (1) is a partially hydrogenated unsaturated nitrile-conjugated diene copolymer rubber in which 70 to 98% of units derived from the conjugated diene are hydrogenated.
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein the copolymer rubber (1) contains 10 to 60% by weight of bound unsaturated nitrile.
Claim 5
Dependent Claim
36 words
The composition of claim 1 wherein the terpolymer rubber (2) consists of 20 to 90% by weight of ethylene, 10 to 80% by weight of propylene and 2 to 25% by weight of the nonconjugated diene.
Claim 6
Dependent Claim
36 words
The composition of claim 1 wherein the amount of the vulcanization accelerator (3) is 0.1 to 10 parts by weight per 100 parts by weight of the copolymer rubber (1) and the terpolymer rubber (2) combined.
References Cited (Backward Citations)
US3798190A
Cited
US4008190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |