US4394489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoroelastomer curatives
Assignee: EIDP Inc
•
Filing: 1982-02-25
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Granted: 1983-07-19
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Expires: 2002-02-25
Abstract
Abstract Allyl-, propargyl- and allenyl- tin curatives for fluoroelastomers with nitrile cure sites provide rapid curing combined with excellent stability in aqueous environments.
Inventors
- 👤 Carl A. Aufdermarsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:49
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/08; C08K; C08K5/00; C08K5/56; C08K5/57
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
In a nitrile-substituted fluoroelastomer composition containing a curing agent, the improvement wherein the curing agent comprises about from 1 to 10 parts per 100 parts by weight of elastomer of an organotin compound having the general formula R x SnY 4-x wherein x is 0-3, R is aryl of 6-10 carbon atoms or alkyl of 1-4 carbon atoms, and Y is at least one of allyl, propargyl, and allenyl.
Claim 2
Dependent Claim
69 words
In a nitrile-substituted fluoroelastomer composition containing a curing agent, the improvement wherein the curing agent comprises about from 1 to 10 parts per 100 parts by weight of elastomer of an organotin compound having the general formula R x SnY 4-x wherein x is 0-3, R is aryl of 6-10 carbon atoms or alkyl of 1-4 carbon atoms, and Y is at least one of allyl, propargyl, and allenyl.
Claim 3
Dependent Claim
10 words
A fluoroelastomer composition of claim 1 wherein x is 3.
Claim 4
Dependent Claim
10 words
A fluoroelastomer composition of claim 2 wherein R is aryl.
Claim 5
Dependent Claim
10 words
A fluoroelastomer composition of claim 3 wherein R is phenyl.
Claim 6
Dependent Claim
21 words
A fluoroelastomer composition of claim 1 wherein the fluoroelastomer is a terpolymer of tetrafluoroethylene, perfluoromethyl perfluorovinylether and a cyano-substituted perfluorovinyl ether.
Claim 7
Dependent Claim
22 words
A fluoroelastomer composition of claim 1 wherein the curing agent comprises about from 3 to 5 parts per 100 parts of fluoroelastomer.
Claim 8
Dependent Claim
10 words
A fluoroelastomer composition of claim 1 wherein Y is allyl.
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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |