US3948851A
Expired / Lapsed
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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: 1976-04-06
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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 sulfonesulfonic acids, or mixtures thereof.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C08L; C08L69/00; C08L81/00; C08L81/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
32 words
A flame retardant aromatic carbonate polymer composition comprising in admixture an aromatic carbonate polymer and a minor amount of a monomeric alkali metal and alkali earth metal aromatic, sulfonesulfonate, or mixtures thereof.
Claim 2
Dependent Claim
32 words
A flame retardant aromatic carbonate polymer composition comprising in admixture an aromatic carbonate polymer and a minor amount of a monomeric alkali metal and alkali earth metal aromatic, sulfonesulfonate, or mixtures thereof.
Claim 3
Dependent Claim
41 words
The composition of claim 1 wherein the composition comprises in admixture 0.01 to about 10 weight percent of the monomeric alkali metal and alkali earth metal aromatic sulfonesulfonate or mixtures thereof based on the weight of the aromatic carbonate polymer composition.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein the metal salt has the following formula: ##SPC5##
Claim 5
Dependent Claim
92 words
The composition of claim 1 wherein the monomeric metal aromatic sulfonesulfonates have the following formula: R'(SO.sub.2).sub.1 R"(SO.sub.3 M).sub.1-6 X.sub.0-11 wherein M is a metal selected from the group consisting of alkali metal and alkali earth metal, R' and R" are independently selected from the group consisting of aryl radicals of 1-2 aromatic rings and an aliphatic radical of 1-6 carbon atoms, provided, however, that R' and R" together must contain at least one aromatic ring to which the SO 3 M group is attached, and wherein X is an electron withdrawing radical.
Claim 6
Dependent Claim
12 words
The composition of claim 4 wherein the metal salt is potassium diphenylsulfone-3-sulfonate.
Claim 7
Dependent Claim
12 words
The composition of claim 4 wherein the metal salt is dipotassium diphenylsulfone-3,3'-disulfonate.
Claim 8
Dependent Claim
26 words
The composition of claim 4 wherein the electron withdrawing radical is selected from the group consisting of halo-, nitro-, trihalomethyl- and cyano- radicals and mixtures thereof.
Claim 9
Dependent Claim
12 words
The composition of claim 4 wherein the electron withdrawing radical is chlorine.
Claim 10
Dependent Claim
14 words
The composition of claim 4 wherein the metal salt is disodium 4,2', 4', 5'-tetrachlorodiphenylsulfone-3,5-disulfonate.
Claim 11
Dependent Claim
12 words
The composition of claim 4 wherein the metal salt is disodium diphenylsulfone-3,3'-disulfonate.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |