Patent US3884877A successfully refreshed from Google Patents.
US3884877A
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Fluoroelastomer compositions with triorganophosphorus oxide
Assignee: 3M Co
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Filing: 1973-10-16
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Granted: 1975-05-20
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Expires: 1993-10-16
Abstract
Abstract A triorgano phosphorus oxide is included in a curable vinylidene fluoride elastomer formulation to provide desirable curing characteristics.
Inventors
- 👤 Robert E Kolb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A CURABLE FLUOROELASTOMER COMPOSITION COMPRISING ELASTOMERIC COPOLYMER OF VINYLIDENE FLUORIDE AND TERMINALLY ETHYLENICALLY UNSATURATED FLUORINATED COMONOMER AND FOR EA ACH HUNDRED PARTS THEREOF: A. 0.2 TO 5 PARTS TRIORGANOPHOSPHORUS OXIDE B. 0.1 TO 5 PARTS QUATERNARY PHOSPHONIUM OR AMMONIUM COMPOUND C. A TOTAL OF 3 TO 40 PARTS CONSISTING OF I. 0 TO 25 PARTS ACID ACCEPTOR II. 0 TO 25 PARTS OPTIONAL BASE D. 0.2 TO 5 PARTS AROMATIC HYDROXY OR AMINO COMPOUND.
Claim 2
Dependent Claim
74 words
A CURABLE FLUOROELASTOMER COMPOSITION COMPRISING ELASTOMERIC COPOLYMER OF VINYLIDENE FLUORIDE AND TERMINALLY ETHYLENICALLY UNSATURATED FLUORINATED COMONOMER AND FOR EA ACH HUNDRED PARTS THEREOF: A. 0.2 TO 5 PARTS TRIORGANOPHOSPHORUS OXIDE B. 0.1 TO 5 PARTS QUATERNARY PHOSPHONIUM OR AMMONIUM COMPOUND C. A TOTAL OF 3 TO 40 PARTS CONSISTING OF I. 0 TO 25 PARTS ACID ACCEPTOR II. 0 TO 25 PARTS OPTIONAL BASE D. 0.2 TO 5 PARTS AROMATIC HYDROXY OR AMINO COMPOUND.
Claim 3
Dependent Claim
16 words
A fluoroelastomer composition according to claim 1 wherein the elastomeric copolymer comprises vinylidene fluoride and perfluoropropene.
Claim 4
Dependent Claim
15 words
A fluoroelastomer composition according to claim 1 wherein the triorganophosphorus oxide is a triorganophosphine oxide.
Claim 5
Dependent Claim
29 words
A fluoroelastomer composition according to claim 3 wherein the triorganophosphine oxide is a phosphine oxide containing three like or unlike unsubstituted or neutrally substituted aliphatic, cycloaliphatic or aromatic groups.
Claim 6
Dependent Claim
14 words
A fluoroelastomer composition according to claim 1 wherein the triorganophosphorus oxide is triorganophosphate ester.
Claim 7
Dependent Claim
36 words
A fluoroelastomer composition according to claim 5 wherein the triorganophosphorus oxide is phosphate ester of three like or unlike saturated or unsaturated aliphatic or cyclic unsubstituted or neutrally substituted alcohols or unsubstituted or neutrally substituted phenols.
Claim 8
Dependent Claim
22 words
A curable fluoroelastomer composition according to claim 1 wherein the acid acceptor is magnesium oxide and the optional base is calcium hydroxide.
Claim 9
Dependent Claim
14 words
A curable fluoroelastomer composition according to claim 1 wherein aromatic hydroxy compound is 2,2-bis-(p-hydroxyphenyl)hexafluoropropane.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |