US5015696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorinated EPDM with superior stability
Assignee: Polysar Rubber Corp
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Filing: 1990-07-30
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Granted: 1991-05-14
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Expires: 2010-07-30
Abstract
Abstract A chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer having a chlorine content of from about 0.5 to 14 percent by weight characterized by superior viscosity stability on storage or exposure to elevated temperatures is obtained by chlorinating an ethylene-alpha olefin-nonconjugated diolefin terpolymer wherein said nonconjugated diolefin is a bridged ring nonconjugated diolefin characterized in that it is a 5-alkenyl-2-norbornene wherein the alkenyl group is a C 5 to C 12 hydrocarbon group with a trisubstituted olefinic bond that is not α, β to said 2-norbornene ring.
Inventors
- 👤 Stephen C. Davis
- 👤 Janet B. Fulton
- 👤 Peter P. M. Hoang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:26
CPC Classifications
C; C08; C08F; C08F212/00; C08F8/00; C08F8/18; C08F8/20; C08F8/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer characterized by superior stability on storage or exposure to elevated temperatures having a chlorine content of from about 0.5 to 14 percent by weight based on the weight of said chlorinated terpolymer wherein the base ethylene-alpha olefin-nonconjugated diolefin terpolymer comprises: (i) about 40 to 80 mol percent ethylene, (ii) about 20 to 60 mol percent of a C 3 to C 8 alpha olefin, and (iii) about 0.5 to 10 mol percent of a bridged ring nonconjugated diolefin characterized in that it is a 5-alkenyl-2-norbornene wherein the alkenyl group is a C 5 to C 12 hydrocarbon group with a trisubstituted olefinic bond that is not to said 2-norbornene ring.
Claim 2
Dependent Claim
116 words
A chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer characterized by superior stability on storage or exposure to elevated temperatures having a chlorine content of from about 0.5 to 14 percent by weight based on the weight of said chlorinated terpolymer wherein the base ethylene-alpha olefin-nonconjugated diolefin terpolymer comprises: (i) about 40 to 80 mol percent ethylene, (ii) about 20 to 60 mol percent of a C 3 to C 8 alpha olefin, and (iii) about 0.5 to 10 mol percent of a bridged ring nonconjugated diolefin characterized in that it is a 5-alkenyl-2-norbornene wherein the alkenyl group is a C 5 to C 12 hydrocarbon group with a trisubstituted olefinic bond that is not to said 2-norbornene ring.
Claim 3
Dependent Claim
25 words
The chlorinated terpolymer of claim 1 wherein said C 3 to C 8 alpha olefin is selected from the group consisting of propylene and 1-butene.
Claim 4
Dependent Claim
17 words
The chlorinated terpolymer of claim 2 wherein said C 3 to C 8 alpha olefin is propylene.
Claim 5
Dependent Claim
27 words
The chlorinated terpolymer of claim 3 wherein said bridged ring nonconjugated diolefin is selected from the group consisting of 5-(1,5-dimethyl-4-hexenyl) -2-norbornene, 5-(3,5-dimethyl-4-hexenyl)-2-norbornene, 5-(5-methyl-4-hexenyl)-2-norbornene, 5-(4-methyl-3-pentenyl)-2-norbornene and 5-(3-methyl-2-butenyl) -2-norbornene.
Claim 6
Dependent Claim
22 words
The chlorinated terpolymer of claim 4 wherein said bridged ring nonconjugated diolefin is selected from the group consisting of 5-(5-methyl-4-hexenyl)-2-norbornene and 5-(3-methyl-2-butenyl)-2-norbornene.
Claim 7
Dependent Claim
108 words
The chlorinated terpolymer of claim 1 having a chlorine content of from about 2 to about 7 percent by weight based on the weight of said chlorinated terpolymer wherein the base ethylene -alpha olefin-nonconjugated diolefin terpolymer comprises: (i) about 40 to 80 mol percent ethylene, (ii) about 20 to 60 mol percent of a C 3 to C 8 alpha olefin, and (iii) about 1 to 6 mol percent of bridged ring nonconjugated diolefin characterized in that it is a 5-alkenyl-2-norbornene wherein the alkenyl group is a C 5 to C 12 hydrocarbon group with a trisubstituted olefinic bond that is not α, β to said 2-norbornene ring.
Claim 8
Dependent Claim
25 words
The chlorinated terpolymer of claim 6 wherein said C 3 to C 8 alpha olefin is selected from the group consisting of propylene and 1-butene.
Claim 9
Dependent Claim
17 words
The chlorinated terpolymer of claim 7 wherein said C 3 to C 8 alpha olefin is propylene.
Claim 10
Dependent Claim
28 words
The chlorinated terpolymer of claim 8 wherein said bridged ring nonconjugated diolefin is selected from the group consisting of 5-(1,5-dimethyl-4-hexenyl) -2-norbornene, 5-(3,5-dimethyl-4-hexenyl)-2-norbornene, 5-(5-methyl-4-hexenyl)-2 norbornene, 5-(4-methyl-3-pentenyl)-2-norbornene and 5-(3-methyl-2-butenyl) -2-norbornene.
Claim 11
Dependent Claim
23 words
The chlorinated terpolymer of claim 9 wherein said bridged ring nonconjugated diolefin is selected from the group consisting of 5-(5-methyl-4-hexenyl) -2-norbornene and 5-(3-methyl-2-butenyl)-2-norbornene.
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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) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |