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US3933734A
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Flame retardant polycarbonate composition
Assignee: General Electric Co
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Filing: 1973-12-28
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Granted: 1976-01-20
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Expires: 1993-12-28
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. Hoogeboom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:59
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: 9
Claim 1
Independent Claim
55 words
A flame retardant carbonate polymer composition comprising in admixture an aromatic carbonate polymer and a minor amount of a metal salt of a monomeric aromatic sulfonic acid or mixtures thereof, 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
55 words
A flame retardant carbonate polymer composition comprising in admixture an aromatic carbonate polymer and a minor amount of a metal salt of a monomeric aromatic sulfonic acid or mixtures thereof, 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
40 words
The composition of claim 1 wherein the composition comprises in admixture 0.01 to about 10 weight percent of the metal salt of a monomeric aromatic sulfonic acid or mixtures thereof based on the weight of the aromatic carbonate polymer composition.
Claim 4
Dependent Claim
130 words
The composition of claim 1 wherein the metal salt of the monomeric aromatic sulfonic acid has the following formula: [A].sub.0.sub.-1 [R].sub.0.sub.-2 [B] wherein R is selected from the group of organic radicals consisting of halogen substituted and unsubstituted alkyl, aralkyl, alkaryl, aralkenyl, alkylene, 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 and y is an integer of 0-10, provided that the sum of y must equal 1 and wherein when R is 0 and A is 1, the R' radicals of [A] and [B] are directly linked.
Claim 5
Dependent Claim
19 words
The composition of claim 3 wherein R in the formula is trichloroethylidene and A in the formula is 1.
Claim 6
Dependent Claim
25 words
The composition of claim 3 wherein R in the formula is trichloroethylidene and A and B are each as follows: (SO.sub.3 Na).sub.1 C.sub.6 H.sub.4 --
Claim 7
Dependent Claim
13 words
The composition of claim 3 wherein the metal salt is as follows: ##SPC4##
Claim 8
Dependent Claim
13 words
The composition of claim 3 wherein the metal salt is calcium benzene sulfonate.
Claim 9
Dependent Claim
12 words
The composition of claim 1 wherein the metal salt is sodium benzenesulfonate.
References Cited (Backward Citations)
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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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |