US3622549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanization of fluoroelastomers
Assignee: EIDP Inc
•
Filing: 1969-08-27
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Granted: 1971-11-23
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Expires: 1989-08-27
Abstract
Abstract Process for vulcanizing fluoroelastomers by heating the elastomer in the presence of a secondary monoamine and an aromatic polyamine or aromatic polyol. Vulcanizates with outstanding physical properties are obtained from this reasonably rapid, low-scorch curing process.
Inventors
- 👤 William John Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:08
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
36 words
A process of claim 1 wherein said monoamine (1) is diethyl amine, didodecyl amine, dicyclohexyl amine, or piperidine, and the aromatic compound (2) is hydroquinone, meta- or para-phenylene diamine, 2,6-diaminotoluene, 2,4-di(p-aminobenzyl)aniline, p-aminophenol, 1,2,4-triaminobenzene or methylene dianiline.
Claim 2
Dependent Claim
41 words
A process of claim 1 wherein the amount of secondary monoamine (1) provides about 0.1- 0.2 part of nitrogen per 100 parts of fluoroelastomer, and the amount of aromatic compound (2) is about 0.75- 1.5 percent by weight of said fluoroelastomer.
Claim 3
Dependent Claim
24 words
A process of claim 3 wherein said secondary monoamine (1) is diethyl amine and said compound (2) is para-phenylene diamine, methylene dianiline or hydroquinone.
Claim 4
Dependent Claim
11 words
A process of claim 1 wherein the aromatic compound is hydroquinone.
Claim 5
Dependent Claim
11 words
A process of claim 4 wherein the aromatic compound is hydroquinone.
Claim 6
Dependent Claim
26 words
A process of claim 4 wherein the fluoroelastomer is a copolymer of vinylidene fluoride and hexafluoropropene; vinylidene fluoride, hexafluoropropene and tetrafluoroethylene; or vinylidene fluoride and 1,2,3,3,3-pentafluoropropene.
Claim 7
Dependent Claim
16 words
A process of claim 4 wherein the fluoroelastomer is a copolymer of vinylidene fluoride and hexafluoropropene.
Claim 8
Dependent Claim
54 words
A process of claim 1 wherein the secondary monoamine is diethyl amine, dibutyl amine, didodecyl amine, piperidine or dicyclohexyl amine and the fluoroelastomer is a copolymer of vinylidene fluoride and (a) hexafluoropropene, (b) tetrafluoroethylene, (c) 1,2,3,3,3-pentafluoropropene, (d) 1,1,3, 3,3-pentafluoropropene, (e) chlorotrifluoroethylene, (f) perfluoroacrylic acid, (g) perfluoroacrylonitrile or (h) the acid fluoride of perfluoroacrylic acid.
Claim 9
Dependent Claim
16 words
A process of claim 9 wherein the aromatic compound is hydroquinone, methylene dianiline or para-phenylene diamine.
Claim 10
Dependent Claim
16 words
A process of claim 10 wherein the fluoroelastomer is a copolymer of vinylidene fluoride and hexafluoropropene.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |