Ignition resistant carbonate polymer with improved processing stability
AssigneeThe Dow Chemical Company
InventorsSamuel A. Ogoe, Hani Farah, Kevin F. Dick, Grace M. Willis
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Abstract
A carbonate polymer composition comprising a carbonate polymer such as a bisphenol-A homopolycarbonate which carbonate polymer contains an amount of a salt represented by the formula: ##STR1## wherein Ar is an aromatic group, R is a monovalent organic moiety, or Ar and R collectively are a divalent aromatic moiety M is a cation, and n is a number corresponding to the valence of M and an amount of a free aromatic sulfimide, which carbonate polymer composition resists combustion upon exposure to an ignition source, exhibits good optical properties, and exhibits molecular weight stability. Optionally, a halogenated organic compound may be added to the composition.
Claims17
A carbonate polymer composition comprising a carbonate polymer having dispersed therein
- (1) a salt represented by the formula:
- ##STR7## wherein Ar is an aromatic group, R is a monovalent organic moiety or Ar and R collectively are a divalent aromatic moiety, M is a cation, and n is a number corresponding to the valence of M, in an amount sufficient to retard combustion when the composition is exposed to an ignition source, and
- (2) a functionally effective amount of a free aromatic sulfimide said free aromatic sulfimide and amount thereof being selected to provide a desirable degree of molecular weight stability to the carbonate polymer composition upon thermal processing thereof.
A carbonate polymer composition comprising a carbonate polymer having dispersed therein
- (1) a salt represented by the formula:
- ##STR9## wherein Ar is an aromatic group, R is a monovalent organic moiety or Ar and R collectively are a divalent aromatic moiety, M is a cation, and n is a number corresponding to the valence of M;
- in an amount of from about 0.001 to about 2 weight percent;
- (2) from about 0.001 to about 2 weight percent of a free aromatic sulfimide;
- and
- (3) from about 0 to about 20 weight percent of a halogenated organic flame retardant compound, all weights based on the total amount of carbonate polymer.
Dependencies are inferred from the claim text.