US4220583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Translucent, flame-retardant polycarbonate compositions
Assignee: General Electric Co
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Filing: 1978-12-06
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Granted: 1980-09-02
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Expires: 1998-12-06
Abstract
Abstract Translucent and flame-retardant polycarbonate compositions comprising an admixture of an aromatic polycarbonate, minor amounts of a partially fluorinated polyolefin, and minor amounts of an organic alkali metal salt or an organic alkaline earth metal salt or mixtures thereof.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C08K5/0008; C08K5/0066; C08K5/04; C08K5/09; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L27/00; C08L41/00; C08L69/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A thermally stable, translucent and flame retardant polycarbonate composition consisting essentially of an admixture of an aromatic polycarbonate, a minor amount of a partially fluorinated polyolefin selected from the group consisting of poly(vinylidene fluoride), poly(vinyl fluoride), poly(trifluoroethylene), poly(chlorotrifluoroethylene) and poly(trifluoroethylene alkali metal sulfonate) or mixtures of said partially fluorinated polyolefin with poly(tetrafluoroethylene) and poly(hexafluoropropylene) and a minor amount of a flame retardant salt selected from the group consisting of an organic alkali metal salt or an organic alkaline earth metal salt or mixtures thereof.
Claim 2
Dependent Claim
84 words
A thermally stable, translucent and flame retardant polycarbonate composition consisting essentially of an admixture of an aromatic polycarbonate, a minor amount of a partially fluorinated polyolefin selected from the group consisting of poly(vinylidene fluoride), poly(vinyl fluoride), poly(trifluoroethylene), poly(chlorotrifluoroethylene) and poly(trifluoroethylene alkali metal sulfonate) or mixtures of said partially fluorinated polyolefin with poly(tetrafluoroethylene) and poly(hexafluoropropylene) and a minor amount of a flame retardant salt selected from the group consisting of an organic alkali metal salt or an organic alkaline earth metal salt or mixtures thereof.
Claim 3
Dependent Claim
16 words
The composition of claim 1 in which the aromatic carbonate is the reaction product of 2,2-bis(4-hydroxypheny)propane.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein the partially fluorinated polyolefin is poly(vinylidene fluoride).
Claim 5
Dependent Claim
18 words
The composition of claim 1 wherein the partially fluorinated polyolefin-fully fluorinated polyolefin mixture is a poly(vinylidene fluoride)-poly(tetrafluoroethylene) mixture.
Claim 6
Dependent Claim
38 words
The composition of claim 1 wherein the partially fluorinated polyolefin or partially fluorinated polyolefin-fully fluorinated polyolefin mixture is present in an amount of from 0.01 to about 5.0 weight percent based on the weight of the polycarbonate composition.
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein the flame retardant salt is an alkali metal salt of an organic sulfonic acid.
Claim 8
Dependent Claim
13 words
The composition of claim 6 wherein the flame retardant salt is sodium benzenesulfonate.
Claim 9
Dependent Claim
14 words
The composition of claim 6 wherein the flame retardant salt is sodium trichlorobenzene sulfonate.
Claim 10
Dependent Claim
13 words
The composition of claim 6 wherein the flame retardant salt is potassium diphenylsulfone-3-sulfonate.
Claim 11
Dependent Claim
13 words
The composition of claim 6 wherein the flame retardant salt is polysodium poly(styrenesulfonate).
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) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |