US4626563A
Expired / Lapsed
US
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Fire retardant carbonate polymer composition
Assignee: DIAMOND TECHNOLOGY PARTNERSHIP Co
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Filing: 1985-04-24
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Granted: 1986-12-02
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Expires: 2005-04-24
Abstract
Abstract Flame retardant carbonate polymers containing an aromatic sulfimide, a monomeric or polymeric halogenated organic compound, a metal sulfate having a pka from 1 to 5 and a fibril forming polytetrafluoroethylene as additives in effective amounts give carbonate polymers that are not only flame retardant but are melt stable i.e. show little loss in molecular weight during processing or melt shearing.
Inventors
- 👤 Samuel A. Ogoe
- 👤 Kevin F. Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:50
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/30; C08K5/00; C08K5/36; C08K5/43; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08L69/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A flame retardant polymer composition comprising an aromatic carbonate polymer having dispersed therein (A) from 0.001 to 2% by weight of a metal salt of an aromatic sulfimide, (B) from 0.01 to 10% by weight of a monomeric or polymeric bromo and/or chloro halogenated aromatic compound, (C) from 0.001 to 2% by weight of a metal salt of an inorganic acid having a pka from 1 to 5, and (D) from 0.01 to 10% by weight of fibril forming polytetrafluoroethylene.
Claim 2
Dependent Claim
80 words
A flame retardant polymer composition comprising an aromatic carbonate polymer having dispersed therein (A) from 0.001 to 2% by weight of a metal salt of an aromatic sulfimide, (B) from 0.01 to 10% by weight of a monomeric or polymeric bromo and/or chloro halogenated aromatic compound, (C) from 0.001 to 2% by weight of a metal salt of an inorganic acid having a pka from 1 to 5, and (D) from 0.01 to 10% by weight of fibril forming polytetrafluoroethylene.
Claim 3
Dependent Claim
91 words
The polymer composition of claim 1 wherein (A) the amount of said sulfimide is in the range from 0.01 to 1.0% by weight based on said polymer composition, (B) the amount of said halogenated aromatic compound is such that the final aromatic-halogen content in said polymer composition is in the range from 0.1 to 1.0% by weight, (C) the amount of said metal salt is in the range from 0.01 to 0.5% by weight, and (D) the amount of said polytetrafluoroethylene is in the range from 0.1 to 5% by weight.
Claim 4
Dependent Claim
73 words
A flame retardant polymer composition comprising an aromatic carbonate polymer having dispersed therein (A) from 0.001 to 2% by weight of a metal salt of an aromatic sulfimide, (B) from 0.01 to 10% by weight of a polybrominated polycarbonate, (C) from 0.001 to 2% by weight of a metal salt of an inorganic acid having a pka from 1 to 5, and (D) from 0.01 to 10% by weight of fibril forming polytetrafluoroethylene.
Claim 5
Dependent Claim
73 words
A flame retardant polymer composition comprising an aromatic carbonate polymer having dispersed therein (A) from 0.001 to 2% by weight of a metal salt of an aromatic sulfimide, (B) from 0.01 to 10% by weight of a polybrominated polycarbonate, (C) from 0.001 to 2% by weight of a metal salt of an inorganic acid having a pka from 1 to 5, and (D) from 0.01 to 10% by weight of fibril forming polytetrafluoroethylene.
Claim 6
Dependent Claim
12 words
The composition of claim 3 wherein said sulfimide salt is potassium paratolylsulfimide.
Claim 7
Dependent Claim
12 words
The composition of claim 3 wherein said metal salt is potassium bisulfate.
Claim 8
Dependent Claim
18 words
The composition of claim 3 wherein said brominated polycarbonate is a copolycarbonate of bisphenol A and tetrabromobisphenol A.
Claim 9
Dependent Claim
15 words
The composition of claim 3 wherein said brominated polycarbonate is a homopolycarbonate of tetrabromobisphenol A.
Claim 10
Dependent Claim
91 words
The polymer composition of claim 3 wherein (A) the amount of said sulfimide is in the range from 0.001 to 2% by weight based on said polymer composition, (B) the amount of said halogenated aromatic compound is such that the final aromatic-halogen content in said polymer composition is in the range from 0.01 to 10% by weight, (C) the amount of said metal salt is in the range from 0.001 to 2% by weight, and (D) the amount of said polytetrafluoroethylene is in the range from 0.01 to 10% by weight.
Claim 11
Dependent Claim
91 words
The polymer composition of claim 3 wherein (A) the amount of said sulfimide is in the range from 0.01 to 1.0% by weight based on said polymer composition, (B) the amount of said halogenated aromatic compound is such that the final aromatic-halogen content in said polymer composition is in the range from 0.1 to 1.0% by weight, (C) the amount of said metal salt is in the range from 0.01 to 0.5% by weight, and (D) the amount of said polytetrafluoroethylene is in the range from 0.1 to 5% by weight.
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