US4467074A
Expired / Lapsed
US
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Fluoroelastomer composition
Assignee: Daikin Industries Ltd
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Filing: 1982-08-18
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Granted: 1984-08-21
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Expires: 2002-08-18
Abstract
Abstract A fluoroelastomer composition comprising a fluoroelastomer, an acid acceptor and a hydrofluoric acid salt of 4,4'-alkylenebis(cyclohexylamine) as a curing agent, which has an excellent scorching resistance and an excellent curing reactivity.
Inventors
- 👤 Masahiko Oka
- 👤 Hideo Kano
- 👤 Yutaka Ueta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:23
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
In a fluoroelastomer composition comprising a fluoroelastomer, an acid acceptor and a curing agent, the improvement which comprises employing as a curing agent a hydrofluoric acid salt of a diamine compound of the general formula: ##STR4## wherein R is a straight or branched alkylene group having 1 to 5 carbon atoms.
Claim 2
Dependent Claim
51 words
In a fluoroelastomer composition comprising a fluoroelastomer, an acid acceptor and a curing agent, the improvement which comprises employing as a curing agent a hydrofluoric acid salt of a diamine compound of the general formula: ##STR4## wherein R is a straight or branched alkylene group having 1 to 5 carbon atoms.
Claim 3
Dependent Claim
29 words
The composition of claim 1, wherein said curing agent is present in an amount of 0.5 to 10 parts by weight per 100 parts by weight of the fluoroelastomer.
Claim 4
Dependent Claim
11 words
The composition of claim 1, wherein said diamine compound is bis(4-aminocyclohexyl)methane.
Claim 5
Dependent Claim
11 words
The composition of claim 1, wherein said diamine compound is 2,2-bis(4-aminocyclohexyl)propane.
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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |