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US 4,360,609 AGranted
Char-forming thermoplastic compositions
AssigneeThe Dow Chemical Company
InventorsCharles E. Reineke, Kent S. Dennis
Life of this patent
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Abstract
The char-forming characteristics of vinyl aromatic polymers are improved by the incorporation therein of (1) active allyl and/or benzyl carbon moieties and (2) an arylsulfonate ester. In an example, a styrenic polymer comprising polyvinylbenzylacetate is given increased char-forming ability by the presence of pentaerythritol parabromobenzenesulfonate.
Claims10
A char-forming aromatic polymer composition comprising:
- (a) a monovinylidene aromatic polymer,
- (b) a char-forming amount of a plurality of active benzyl carbon and/or active allyl carbon moieties, and
- (c) a catalyzing amount of an arylsulfonate ester compound wherein the arylsulfonate ester compound comprises one or more arylsulfonate ester moieties of the formula:
- Ar--SO.sub.3 --CH.sub.2 --, wherein Ar is an unsubstituted or inertly substituted aryl group.
1 more element
Dependencies are inferred from the claim text.