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US4111977A
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Flame retardant polycarbonate composition
Assignee: General Electric Co
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Filing: 1977-06-17
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Granted: 1978-09-05
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Expires: 1997-06-17
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 unsubstituted or halogenated oxocarbon acids, or mixtures of these.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
A flame retardant aromatic carbonate polymer composition comprising in admixture an aromatic carbonate polymer and a minor amount of an additive selected from the group consisting of the metal salt of unsubstituted and halogenated oxocarbon acids, and mixtures thereof, wherein said metal salts thereof are selected from the group consisting of alkali metals and alkaline earth metals, and mixtures thereof, and said halogen is selected from fluorine, chlorine and bromine, and said oxocarbon acids are characterized by having the moiety ##STR10## forming a cyclic non-aromatic ring in their structure.
Claim 2
Dependent Claim
89 words
A flame retardant aromatic carbonate polymer composition comprising in admixture an aromatic carbonate polymer and a minor amount of an additive selected from the group consisting of the metal salt of unsubstituted and halogenated oxocarbon acids, and mixtures thereof, wherein said metal salts thereof are selected from the group consisting of alkali metals and alkaline earth metals, and mixtures thereof, and said halogen is selected from fluorine, chlorine and bromine, and said oxocarbon acids are characterized by having the moiety ##STR10## forming a cyclic non-aromatic ring in their structure.
Claim 3
Dependent Claim
122 words
The composition of claim 1 wherein the metal salt of the unsubstituted and halogenated oxocarbon acids have the following formulae: ##STR11## wherein M is selected from the group consisting of alkali metals and alkaline earth metals, Y is an --OM radical wherein M has the meaning recited above or a halogen radical independently selected from the group consisting of chlorine, fluorine, bromine, and X is a divalent radical selected from the group consisting of ##STR12## wherein m and n are integers from 1-2, Hal is a halogen independently selected from the group consisting of chlorine, fluorine and bromine, and arylene is an aromatic radical of from 1-3 aromatic rings and is selected from the group consisting of phenylene, naphthylene and anthracenylene radicals.
Claim 4
Dependent Claim
9 words
The composition of claim 2 wherein Hal is chlorine.
Claim 5
Dependent Claim
11 words
The composition of claim 2 wherein the additive is disodium squarate.
Claim 6
Dependent Claim
11 words
The composition of claim 2 wherein the additive is disodium croconate.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein the additive is barium rhodizonate.
Claim 8
Dependent Claim
11 words
The composition of claim 1 wherein the additive is calcium chloranilate.
Claim 9
Dependent Claim
14 words
The composition of claim 1 wherein the additive is said metal salt of 3-chloro-1,4-naphthoquinone-2-ol.
Claim 10
Dependent Claim
14 words
The composition of claim 1 wherein the additive is said metal salt of 2-chloro-4,5,6,7-tetrafluoroindenon-3-ol.
Claim 11
Dependent Claim
15 words
The composition of claim 1 wherein the additive is said metal salt of fluoranilic acid.
Claim 12
Dependent Claim
14 words
The composition of claim 1 wherein the additive is said metal salt of 3,5,6,7,8-pentachloro-1,4-naphthoquinone-2-ol.
Claim 13
Dependent Claim
14 words
The composition of claim 1 wherein the additive is said metal salt of 2,4,4-trichlorocyclopenten-3,5-dione-1-ol.
Claim 14
Dependent Claim
15 words
The composition of claim 1 wherein the additive is said metal salt of bromanilic acid.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |