US3883613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant composition of polyphenylene ether, styrene resin and trimesityl phosphate and process for the preparation thereof
Assignee: General Electric Co
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Filing: 1972-12-04
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Granted: 1975-05-13
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Expires: 1992-12-04
Abstract
Abstract Compositions of polyphenylene ethers and styrene resins are rendered flame retardant, without loss in heat distortion properties or the need to include aromatic halogen compounds, by adding minor amounts of trimesityl phosphate.
Inventors
- 👤 Glenn D Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:31
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08K5/523; C08K5/53; C08L2201/00; C08L2201/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
20 words
A PROCESS FOR DECREASING THE SELF-EXTINGUISHING TIME OF A NORMALLY FLAMMABLE COMPOSITION COMPRISING I. A POLYPHENYLENE ETHER OF THE FORMULA
Claim 2
Dependent Claim
20 words
A PROCESS FOR DECREASING THE SELF-EXTINGUISHING TIME OF A NORMALLY FLAMMABLE COMPOSITION COMPRISING I. A POLYPHENYLENE ETHER OF THE FORMULA
Claim 3
Dependent Claim
57 words
A process as defined in claim 1 wherein the styrene resin is present in an amount of from about 80 to about 20 percent by weight of the weight of components (i) and (ii) in the composition and has at least 25 percent by weight of units derived from a a vinyl aromatic compound of the formula
Claim 4
Dependent Claim
32 words
A process as defined in claim 1 wherein the trimesityl phosphate comprises from about 1 to about 10 parts by weight per 100 parts by weight of component (i) and component (ii).
Claim 5
Dependent Claim
12 words
A process as defined in claim 1 wherein component (i) is poly(2,6-dimethyl-1,4-phenylene)ether.
Claim 6
Dependent Claim
17 words
A process as defined in claim 2 wherein the styrene resin is a rubber-modified high impact polystyrene.
Claim 7
Dependent Claim
18 words
A flame retardant composition comprising A. a normally flammable composition comprising i. a polyphenylene ether of the formula
Claim 8
Dependent Claim
18 words
A flame retardant composition comprising A. a normally flammable composition comprising i. a polyphenylene ether of the formula
Claim 9
Dependent Claim
56 words
A composition as defined in claim 6 wherein the styrene resin is present in an amount of from about 80 to about 20 percent by weight of the weight of components (i) and (ii) in the composition and has at least 25 percent by weight of units derived from a vinyl aromatic compound of the formula
Claim 10
Dependent Claim
32 words
A composition as defined in claim 6 wherein the trimesityl phosphate comprises from about 1 to about 10 parts by weight per 100 parts by weight of component (i) and component (ii).
Claim 11
Dependent Claim
12 words
A composition as defined in claim 6 wherein component (i) is poly(2,6-dimethyl-1,4-phenylene)ether.
Claim 12
Dependent Claim
17 words
A composition as defined in claim 7 wherein the styrene resin is a rubber-modified high impact polystyrene.
References Cited (Backward Citations)
US3639506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |