US4489196A
Expired / Lapsed
US
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Curable fluoropolymer composition
Assignee: EIDP Inc
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Filing: 1983-04-26
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Granted: 1984-12-18
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Expires: 2003-04-26
Abstract
Abstract A curable fluoropolymer composition containing a copolymer of vinylidene fluoride and hexafluoropropylene or the like, a vulcanization accelerator which is a quaternary ammonium compound or a quaternary phosphonium compound, a crosslinking agent such as a bisphenol, a divalent metal oxide or divalent metal hydroxide acid acceptor, and as a coaccelerator a polyol e.g. pentaerythritol or the like.
Inventors
- 👤 Walter W. Schmiegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:01
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
A curable composition comprising: (A) a copolymer containing polymerized vinylidene fluoride units, and polymerized hexafluoropropylene units, or polymerized chlorotrifluoroethylene units, or polymerized 1-hydropentafluoropropylene units or polymerized 2-hydropentafluoropropylene units, (B) a quaternary phosphonium or quaternary ammonium vulcanization accelerator, (C) a crosslinking agent selected from the group consisting of dihydroxy-, trihydroxy- and tetrahydroxy- -benzenes, -naphthalenes and -anthracenes having an aromatic ring, and bisphenols of the formula ##STR6## wherein A is a difunctional radical, x is 0 or 1 and n is 1 or 2, (D) a polyol coaccelerator selected from the class consisting of pentaerythritol, 2,2-dimethyl-1,3-propanediol, dipentaerythritol, and trimethylol propane. (E) a metal compound selected from the group consisting of divalent metal oxide, divalent metal hydroxide and mixtures of such oxides and hydroxides with metal salts of weak acids. said composition containing for each 100 parts by weight of component A, about 0.2 to 2 parts by weight of component (B), about 0.5 to 4 parts of component (C), about 0.05 to 4 parts of component (D), and 0.5 to 30 parts of component (E).
Claim 2
Dependent Claim
173 words
A curable composition comprising: (A) a copolymer containing polymerized vinylidene fluoride units, and polymerized hexafluoropropylene units, or polymerized chlorotrifluoroethylene units, or polymerized 1-hydropentafluoropropylene units or polymerized 2-hydropentafluoropropylene units, (B) a quaternary phosphonium or quaternary ammonium vulcanization accelerator, (C) a crosslinking agent selected from the group consisting of dihydroxy-, trihydroxy- and tetrahydroxy- -benzenes, -naphthalenes and -anthracenes having an aromatic ring, and bisphenols of the formula ##STR6## wherein A is a difunctional radical, x is 0 or 1 and n is 1 or 2, (D) a polyol coaccelerator selected from the class consisting of pentaerythritol, 2,2-dimethyl-1,3-propanediol, dipentaerythritol, and trimethylol propane. (E) a metal compound selected from the group consisting of divalent metal oxide, divalent metal hydroxide and mixtures of such oxides and hydroxides with metal salts of weak acids. said composition containing for each 100 parts by weight of component A, about 0.2 to 2 parts by weight of component (B), about 0.5 to 4 parts of component (C), about 0.05 to 4 parts of component (D), and 0.5 to 30 parts of component (E).
Claim 3
Dependent Claim
11 words
The composition of claim 1 in which the polyol is pentaerythritol.
Claim 4
Dependent Claim
11 words
The composition of claim 1 in which the polyol is 2,2-dimethyl-1,3-propanediol.
Claim 5
Dependent Claim
11 words
The composition of claim 1 in which the polyol is dipentaerythritol.
Claim 6
Dependent Claim
14 words
The composition of claim 2 in which the divalent metal oxide is calcium hydroxide.
Claim 7
Dependent Claim
18 words
The process of forming a fluoroelastomer which comprises heating the composition of claim 1 in a confining zone.
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) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |