US4115354A
Expired / Lapsed
US
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Flame retardant polycarbonate composition
Assignee: General Electric Co
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Filing: 1976-01-20
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Granted: 1978-09-19
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Expires: 1996-01-20
Abstract
Abstract A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a flame retardant additive which may be the metal salts of either monomeric or polymeric aromatic sulfonic acids, or mixtures thereof.
Inventors
- 👤 Victor Mark
- 👤 Thomas J. Hoogebroom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:14
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C08L; C08L25/00; C08L41/00; C08L49/00; C08L65/00; C08L69/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A flame retardant carbonate polymer composition comprising in admixture an aromatic carbonate polymer and 0.01 to about 10 weight percent based on the weight of the aromatic carbonate polymer composition of an additive which is the metal salt of a polymeric aromatic sulfonate or mixtures thereof, or a mixture of the metal salt of a polymeric aromatic sulfonate and the metal salt of a monomeric aromatic sulfonate, wherein said metal salts thereof are selected from the group consisting of the alkali metal salts and the alkali earth metal salts and mixtures thereof.
Claim 2
Dependent Claim
92 words
A flame retardant carbonate polymer composition comprising in admixture an aromatic carbonate polymer and 0.01 to about 10 weight percent based on the weight of the aromatic carbonate polymer composition of an additive which is the metal salt of a polymeric aromatic sulfonate or mixtures thereof, or a mixture of the metal salt of a polymeric aromatic sulfonate and the metal salt of a monomeric aromatic sulfonate, wherein said metal salts thereof are selected from the group consisting of the alkali metal salts and the alkali earth metal salts and mixtures thereof.
Claim 3
Dependent Claim
145 words
The composition of claim 1 wherein the metal salt of the polymeric aromatic sulfonate has the following formula: [A].sub.m [R.sub.1 ].sub.m+n [B].sub.n wherein R 1 is selected from the group of organic radicals consisting of halogen substituted and unsubstituted arylene, alkylene, aralkylene, alkenylene, aralkenylene, alkylidene, aralkylidene, alkenylidene and aralkenylidene radicals of 1-20 carbon atoms and wherein A and B are independently selected from the following formula: (SO.sub.3 M).sub.y R' wherein M is a metal selected from the group consisting of alkali metal and alkali earth metal, R' is an aryl radical of 1-4 aromatic rings, y is an integer of 0-10, provided that the sum of y must equal at least 1, and further wherein m is an integer of from 0 to 2000, n is an integer of from 0-2000, provided, however, that the sum of m and n must equal at least 4.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein the composition is the polysodium salt of polystyrene polysulfonic acid.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein the composition is as follows: ##STR8##
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |