Patent US4480074A successfully refreshed from Google Patents.
US4480074A
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Process for preparing elastoplastic compositions
Assignee: Advanced Elastomer Systems LP
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Filing: 1982-10-20
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Granted: 1984-10-30
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Expires: 2002-10-20
Abstract
Abstract A process is described for preparing elastoplastic composition which comprises dynamically vulcanizing rubber with a thermoplastic blend of cured rubber and plastic.
Inventors
- 👤 Yun L. Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:35
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/243; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/346; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/16; C08L91/00; C08J2323/00; C08J2323/02; C08L2312/00; C08L2312/04; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A process for preparing an elastoplastic composition which comprises dynamically vulcanizing a blend comprising (a) an elastoplastic composition, prepared by dynamic vulcanization, comprising a blend of about 25 to 50 parts by weight of crystalline polyolefin resin and, correspondingly, about 75 to 50 parts by weight of vulcanized monoolefin copolymer rubber, and (b) unvulcanized but vulcanizable monoolefin copolymer rubber composition comprising monoolefin copolymer rubber in an amount so that after vulcanization the final composition (c) comprises a blend of about 15 to 45 parts by weight of crystalline polyolefin resin and, correspondingly, about 85 to 55 parts by weight of vulcanized monoolefin copolymer rubber.
Claim 2
Dependent Claim
104 words
A process for preparing an elastoplastic composition which comprises dynamically vulcanizing a blend comprising (a) an elastoplastic composition, prepared by dynamic vulcanization, comprising a blend of about 25 to 50 parts by weight of crystalline polyolefin resin and, correspondingly, about 75 to 50 parts by weight of vulcanized monoolefin copolymer rubber, and (b) unvulcanized but vulcanizable monoolefin copolymer rubber composition comprising monoolefin copolymer rubber in an amount so that after vulcanization the final composition (c) comprises a blend of about 15 to 45 parts by weight of crystalline polyolefin resin and, correspondingly, about 85 to 55 parts by weight of vulcanized monoolefin copolymer rubber.
Claim 3
Dependent Claim
33 words
The process of claim 1 in which the amount of monoolefin rubber of (b) is about 10 to 70 parts by weight per 100 parts by weight of vulcanized monoolefin rubber of (a).
Claim 4
Dependent Claim
31 words
The process of claim 2 in which (a) comprises 25 to 40 parts by weight of crystalline polyolefin resin and correspondingly, 75 to 60 parts by weight of vulcanized monoolefin rubber.
Claim 5
Dependent Claim
33 words
The process of claim 3 in which the amount of monoolefin rubber of (b) is about 10 to 40 parts by weight per 100 parts by weight of vulcanized monoolefin rubber of (a).
Claim 6
Dependent Claim
17 words
The process of claim 4 in which the monoolefin rubber of (a) and (b) is EPDM rubber.
Claim 7
Dependent Claim
13 words
The process of claim 5 in which the crystalline polyolefin resin is polypropylene.
Claim 8
Dependent Claim
15 words
The process of claim 6 in which the dynamic vulcanization temperature is about 170°-230° C.
Claim 9
Dependent Claim
15 words
The process of claim 7 in which the EPDM rubber is vulcanized with phenolic curative.
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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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |