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US4855362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer alloy
Assignee: Goodyear Tire and Rubber Co
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Filing: 1987-12-28
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Granted: 1989-08-08
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Expires: 2007-12-28
Abstract
Abstract The present invention reveals a polymer alloy which is comprised of (a) at least one highly unsaturated rubbery polymer which is covulcanized with at least one N-chlorothio-sulfonamide modified EPDM rubber and (b) at least one thermoplastic resin. A blend of polypropylene with nitrile rubber which has been cocured with an N-chlorothio-sulfonamide modified EPDM rubber is a representative example of such a polymer alloy.
Inventors
- 👤 Joel Muse, Jr.
- 👤 Howard A. Colvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:58
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08F; C08F8/00; C08F8/34; C08L21/00; C08L23/00; C08L23/02; C08L23/16; C08L23/26; C08L23/32; C08F2800/00; C08F2800/20; C08L23/10; C08L23/12; C08L23/34
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
33 words
A polymer alloy which is comprised of (a) at least one highly unsaturated rubbery polymer which is covulcanized with at least one N-chlorothio-sulfonamide modified EPDM rubber and (b) at least one thermoplastic polyolefin.
Claim 2
Dependent Claim
33 words
A polymer alloy which is comprised of (a) at least one highly unsaturated rubbery polymer which is covulcanized with at least one N-chlorothio-sulfonamide modified EPDM rubber and (b) at least one thermoplastic polyolefin.
Claim 3
Dependent Claim
29 words
A polymer alloy which is comprised of (a) a nitrile rubber which is covulcanized with a least one N-chlorothio-sulfonamide modified EPDM rubber and (b) at least one thermoplastic polyolefin.
Claim 4
Dependent Claim
29 words
A polymer alloy which is comprised of (a) a nitrile rubber which is covulcanized with a least one N-chlorothio-sulfonamide modified EPDM rubber and (b) at least one thermoplastic polyolefin.
Claim 5
Dependent Claim
74 words
A process for preparing a polymer alloy which comprises (a) dispersing at least one highly unsaturated rubbery polymer and at least one N-chlorothio-sulfonamide modified EPDM throughout at least one thermoplastic polyolefin to produce a polymer blend and (b) mixing vulcanizing agents into said blend and heating the polymer blend to a temperature and for a time sufficient to covulcanize the highly unsaturated rubbery polymer and the N-chlorothio-sulfonamide modified EPDM to produce the polymer alloy.
Claim 6
Dependent Claim
74 words
A process for preparing a polymer alloy which comprises (a) dispersing at least one highly unsaturated rubbery polymer and at least one N-chlorothio-sulfonamide modified EPDM throughout at least one thermoplastic polyolefin to produce a polymer blend and (b) mixing vulcanizing agents into said blend and heating the polymer blend to a temperature and for a time sufficient to covulcanize the highly unsaturated rubbery polymer and the N-chlorothio-sulfonamide modified EPDM to produce the polymer alloy.
Claim 7
Dependent Claim
51 words
A polymer alloy as specified in claim 1 wherein said alloy is comprised of from 20 to 80 weight percent of said thermoplastic polyolefin, from about 10 to 90 weight percent of said modified EPDM rubber, and from about 10 to about 90 weight percent of said highly unsaturated rubbery polymer.
Claim 8
Dependent Claim
53 words
A rubber alloy as specified in claim 2 wherein said rubber alloy is comprised of from about 20 to about 80 weight percent of said thermoplastic polyolefin, from about 10 to about 90 weight percent of said nitrile rubber, and from about 10 to about 90 weight percent of said modified EPDM rubber.
Claim 9
Dependent Claim
14 words
A rubber alloy as specified in claim 5 wherein said thermoplastic polyolefin is polypropylene.
Claim 10
Dependent Claim
36 words
A process as specified in claim 3 wherein said heating is carried out in the presence of sulfur and wherein said heating is to a temperature which is above the melting point of the thermoplastic polyolefin.
Claim 11
Dependent Claim
32 words
A rubber alloy as specified in claim 6 wherein said modified EPDM rubber has a molar ratio of ethylene to propylene which is within the range of about 30/70 to about 70/30.
Claim 12
Dependent Claim
17 words
A rubber alloy as specified in claim 8 wherein said modified EPDM rubber is modified with N-chlorothio-N-methyl-benezenesulfonamide.
Claim 13
Dependent Claim
37 words
A rubber alloy as specified in claim 6 wherein said modified EPDM is comprised of repeat units which are derived from about 75 weight percent ethylene, about 22 weight percent propylene, and about 3 weight percent 1,4-hexadiene.
Claim 14
Dependent Claim
17 words
A rubber alloy as specified in claim 10 wherein said modified EPDM rubber is modiifed with N-chlorothio-N-methyl-benzenesulfonamide.
Claim 15
Dependent Claim
42 words
A rubber alloy as specified in claim 11 wherein said rubber alloy is comprised of from about 25 to 40 weight percent polypropylene, from about 25 to 40 weight percent modified EPDM, and from about 25 to 40 weight percent nitrile rubber.
Claim 16
Dependent Claim
21 words
A process as specified in claim 3 wherein the highly unsaturated rubbery polymer and the N-chlorothio-sulfonamide modified EPDM are dynamically vulcanized.
Claim 17
Dependent Claim
17 words
A process as specified in claim 13 wherein said highly unsaturated rubbery polymer is a nitrile rubber.
Claim 18
Dependent Claim
13 words
A process as specified in claim 14 wherein said thermoplastic polyolefin is polypropylene.
Claim 19
Dependent Claim
29 words
A process as specified in claim 15 wherein said dynamic vulcanization is done at a temperature which is within the range of about 180° C. to about 220° C.
Claim 20
Dependent Claim
24 words
A process as specified in claim 16 wherein said modified EPDM is comprised of repeat units which are derived from ethylene, propylene, and 1,4-hexadiene.
Claim 21
Dependent Claim
29 words
A process as specified in claim 13 wherein said dynamic vulcanization is done at a temperature which is in the range of aobut 150° C. to about 300° C.
Claim 22
Dependent Claim
15 words
A process as specified in claim 17 wherein said modified EPDM is modified with N-chlorothio-N-methyl-benzenesulfonamide.
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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |