US3732191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polythiol vulcanization of epihalohydrin elastomers
Assignee: Goodrich Corp
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Filing: 1972-02-07
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Granted: 1973-05-08
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Expires: 1992-02-07
Abstract
Abstract EPIHALOHYDRIN ELASTOMERS ARE VULCANIZED BY MEANS OF A 3-COMPONENT VULCANIZATION SYSTEM COMPRISING A POLYTHIOL, A TERTIARY AMINE, AND A METAL BASE COMPOUND. POLYTHIOLS SUCH AS 3,6-DITHIAOCTANE-1,8-DITHIOL IN COMBINATION WITH A TERTIARY AMINE SUCH AS 1,4-DIAZA(2.2.2)BICYCLOOCTANE, AND SODIUM ACRYLATE OR LITHARGE AS A METAL BASE COMPOUND VULCANIZE EPIHALOHYDRIN ELASTOMERS SUCH AS THE HOMOPOLYMERS OF EPICHLOROHYDRIN AND ELASTOMERIC COPOLYMERS OF EPICHLOROHYDRIN AND ETHYLENE OXIDE FORMING VVULCANIZATES OF EXCELLENT PHYSICAL AND CHEMICAL PROPERTIES. THE CURING SYSTEM IS QUITE FLEXIBLE PROVIDING A WIDE VARIATION IN CURE TIMES AT ORDINARY VULCANIZATION TEMPERATURES.
Inventors
- 👤 P Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:25
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K13/00; C08K13/02; C08L; C08L71/00; C08L71/02; C08L71/03
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |