US4316836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized fluoroelastomer compositions
Assignee: EIDP Inc
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Filing: 1980-04-23
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Granted: 1982-02-23
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Expires: 2000-04-23
Abstract
Abstract Vulcanizates of certain fluoroelastomer terpolymer compositions, wherein the terpolymer is derived from tetrafluoroethylene, perfluoro(methyl vinyl ether), and a cure-site monomer, and further wherein the composition contains non-black filler, exhibit significantly improved stability upon heat aging when small quantities of quinacridone-type pigments are incorporated therein.
Inventors
- 👤 Carl A. Aufdermarsh, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
A vulcanizable composition comprising a fluoroelastomer which is a terpolymer derived from tetrafluoroethylene, perfluoromethyl perfluorovinyl ether and a cure-site monomer, at least one non-black filler, and a small quantity of at least one quinacridone-type pigment selected from the group consisting of quinacridone, quinacridone quinone, substituted quinacridone, substituted quinacridone quinone, and mixtures and solid solutions of such substituted and unsubstituted quinacridones and quinacridone quinones.
Claim 2
Dependent Claim
63 words
A vulcanizable composition comprising a fluoroelastomer which is a terpolymer derived from tetrafluoroethylene, perfluoromethyl perfluorovinyl ether and a cure-site monomer, at least one non-black filler, and a small quantity of at least one quinacridone-type pigment selected from the group consisting of quinacridone, quinacridone quinone, substituted quinacridone, substituted quinacridone quinone, and mixtures and solid solutions of such substituted and unsubstituted quinacridones and quinacridone quinones.
Claim 3
Dependent Claim
35 words
A composition of claim 1 wherein the cure-site monomer is selected from the group consisting of: (a) perfluoro(4-cyanobutyl vinyl ether), (b) perfluoro(4-carbomethoxybutyl vinyl ether), (c) perfluoro(2-phenoxypropyl vinyl ether), (d) perfluoro(3-phenoxypropyl vinyl ether), and (e) perfluoro(8-cyano-5-methyl-3,6-dioxa-1-octene).
Claim 4
Dependent Claim
31 words
A composition of claim 1 wherein the terpolymer consists essentially of 53-79.8 mole percent of tetrafluoroethylene, 20-45 mole percent of perfluoromethyl perfluorovinyl ether and 0.2-2 mole percent of the cure-site monomer.
Claim 5
Dependent Claim
31 words
A composition of claim 2 wherein the terpolymer consists essentially of 53-79.8 mole percent of tetrafluoroethylene, 20-45 mole percent of perfluoromethyl perfluorovinyl ether and 0.2-2 mole percent of the cure-site monomer.
Claim 6
Dependent Claim
13 words
A composition of claim 2 wherein the cure-site monomer is perfluoro(2-phenoxypropyl vinyl ether).
Claim 7
Dependent Claim
31 words
A composition of claim 5 wherein the terpolymer consists essentially of 65.4-73.6 mole percent of tetrafluoroethylene, 26-34 mole percent of perfluoromethyl perfluorovinyl ether and 0.5 mole percent of perfluoro(2-phenoxypropyl vinyl ether).
Claim 8
Dependent Claim
27 words
A composition of claim 1 wherein the non-black filler is selected from the group consisting of titanium dioxide, zirconium dioxide, silica, clay asbestos and hydrated aluminum oxide.
Claim 9
Dependent Claim
12 words
A composition of claim 7 wherein the non-black filler is titanium dioxide.
Claim 10
Dependent Claim
30 words
A composition of claim 1 wherein the quinacridone-type pigment is selected from the group consisting of quinacridone, quinacridone quinone, substituted quinacridone, substituted quinacridone quinone, and mixtures and solid solutions thereof.
Claim 11
Dependent Claim
15 words
A composition of claim 9 wherein the quinacridone-type pigment is a solid solution containing quinacridone.
Claim 12
Dependent Claim
19 words
A composition of claim 1 wherein quinacridone-type pigment is present in the composition in an amount of 0.1-10 phr.
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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) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |