Patent US4397987A successfully refreshed from Google Patents.
US4397987A
Expired / Lapsed
US
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Nitrile rubber/EPDM graft blends
Assignee: Uniroyal Chemical Co Inc
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Filing: 1982-09-23
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Granted: 1983-08-09
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Expires: 2002-09-23
Abstract
Abstract Oil resistant, ozone resistant polymer blends are prepared by blending an Acrylonitrile/Butadiene polymer with an EPDM polymer which has had grafted onto it a polymer prepared by polymerizing onto the backbone a methacrylate monomer. The preferred EPDM graft polymer is a methylmethacrylate grafted onto the EPDM backbone.
Inventors
- 👤 Robert J. Cornell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:05
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/06; C08F; C08F255/00; C08F255/02; C08F279/00; C08F279/02; C08L51/04; C08L55/00; C08L55/02; C08L9/00; C08L9/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
An elastomeric vulcanizable composition consisting essentially of: from 50 to 90 parts, by weight, butadiene-acrylonitrile copolymer elastomer and from 10 to 50 parts by weight, ethylene-propylene-non-conjugated diene terpolymer elastomer grafted with a monomer selected from the group consisting of alkyl acrylate and alkyl methacrylate wherein said alkyl radical in said monomer includes 1-4 carbon atoms; wherein said total elastomeric content of said composition is in the range of 80 and 99.5% by weight.
Claim 2
Dependent Claim
73 words
An elastomeric vulcanizable composition consisting essentially of: from 50 to 90 parts, by weight, butadiene-acrylonitrile copolymer elastomer and from 10 to 50 parts by weight, ethylene-propylene-non-conjugated diene terpolymer elastomer grafted with a monomer selected from the group consisting of alkyl acrylate and alkyl methacrylate wherein said alkyl radical in said monomer includes 1-4 carbon atoms; wherein said total elastomeric content of said composition is in the range of 80 and 99.5% by weight.
Claim 3
Dependent Claim
22 words
A composition in accordance with claim 1 wherein said non-conjugated diene is selected from the group consisting of dicyclopentadiene, 2-ethylidene-5-norbornene and 1,4-hexadiene.
Claim 4
Dependent Claim
24 words
A composition in accordance with claim 1 wherein said monomer is selected from the group consisting of methyl acrylate, methyl methacrylate and butyl methacrylate.
Claim 5
Dependent Claim
24 words
A composition in accordance with claim 1 also consisting of a vulcanizing agent present in sufficient amount to at least partially cure said composition.
Claim 6
Dependent Claim
29 words
A composition in accordance with claim 1 wherein the degree of grafting of said monomer to said ethylene-propylene-non-conjugated diene terpolymer is in the range of between 0.02 and 0.31.
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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |