US4166083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition and process for preparation thereof
Assignee: Zeon Corp
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Filing: 1978-02-23
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Granted: 1979-08-28
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Expires: 1998-02-23
Abstract
Abstract A blended rubber composition comprising (a) 70 to 95% by weight of at least one diene rubber, and (b) 30 to 5% by weight of a polymer or copolymer obtained by polymerizing at least one norbornene compound expressed by the general formula ##STR1## wherein R and R', independently from each other, represent a hydrogen atom, an alkyl group with 1 to 4 carbon atoms, and alkoxy group with 1 to 4 carbon atoms or the group --OCOCH 3 .
Inventors
- 👤 Akio Ueda
- 👤 Keiji Komuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:58
CPC Classifications
C; C08; C08L; C08L21/00; C08L9/00; C08L9/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
A blended rubber composition comprising (a) 70 to 95% by weight of at least one diene rubber, and (b) 30 to 5% by weight of (i) a homopolymer obtained by polymerizing one norbornene compound expressed by the general formula ##STR3## wherein R and R', independently from each other, represent a hydrogen atom, and alkyl group with 1 to 4 carbon atoms, an alkoxy group with 1 to 4 carbon atoms or the group --OCOCH 3 , or (ii) a copolymer obtained by polymerizing at least two different norbornene compounds expressed by the above formula.
Claim 2
Dependent Claim
94 words
A blended rubber composition comprising (a) 70 to 95% by weight of at least one diene rubber, and (b) 30 to 5% by weight of (i) a homopolymer obtained by polymerizing one norbornene compound expressed by the general formula ##STR3## wherein R and R', independently from each other, represent a hydrogen atom, and alkyl group with 1 to 4 carbon atoms, an alkoxy group with 1 to 4 carbon atoms or the group --OCOCH 3 , or (ii) a copolymer obtained by polymerizing at least two different norbornene compounds expressed by the above formula.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the diene rubber (a) is isoprene rubber.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein the diene rubber (a) is styrene-butadiene copolymer rubber.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein the diene rubber (a) is a mixture of styrene-butadiene copolymer rubber and butadiene rubber.
Claim 6
Dependent Claim
8 words
The composition of claim 1 which is vulcanized.
Claim 7
Dependent Claim
35 words
A process for the production of the blended rubber composition of claim 1, which comprises softening the norbornene polymer or copolymer (b) with a process oil, and then blending it with the diene rubber (a).
Claim 8
Dependent Claim
20 words
The composition of claim 1 wherein component (b) is a homopolymer of the norbornene compound expressed by the general formula.
Claim 9
Dependent Claim
11 words
The composition of claim 7 wherein the norbornene compound is 5-norbornene.
Claim 10
Dependent Claim
26 words
The rubber composition of claim 1 wherein component (b) is a copolymer obtained by polymerizing at least two different norbornene compounds expressed by the general formula.
Claim 11
Dependent Claim
44 words
The composition of claim 1 wherein the norbornene compound expressed by the general formula is a member selected from the group consisting of 5-norbornene, 5-norbornene-2-methyl, 5-norbornene-2-ethyl, 5-norbornene-2-butyl, 2-methoxy-5-norbornene, 2-ethoxy-5-norbornene, 2-isobutoxy-5-norbornene, 2,3-dimethyl-5-norbornene, an acetic acid ester of 5-norbornene-2-ol, and an acetic acid ester of 5-norbornene-2,3-diol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-27 | 1983-02-26 | 1983-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-27 | 1987-02-26 | 1987-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-27 | 1991-02-26 | 1991-08-28 | $7700.00 | Window Closed / Lapsed |