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US 4,735,983 AGranted
Flame-retardant styrene-base resin composition
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsMasato Takaku, Ichiro Otsuka, Keizi Iio, Nobuyuki Tashiro, Daizo Natsugari, Hideo Ichikawa
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Abstract
A flame-retardant styrene-base resin composition is composed of 100 parts by weight of a styrene-base resin, 2.0-20.0 parts by weight of a halogenous flame retardant and 0.1-5.0 parts by weight of an antimony compound. The weight ratio of halogen atoms/antimony atoms in the resin composition is 5 or greater. The resin composition of this invention has well-balanced specific gravity, impact resistance and heat resistance and flame retardancy.
Claims5
A flame-retardant styrene-based resin composition, comprising:
- (a) 100 parts by weight of a styrene-based resin,
- (b) from 2.0 to 20.0 parts by weight of a flame-retardant selected from the group consisting of tetrabromobisphenol A, a tetrabromobisphenol A carbonate oligomer and an ether derivative of tetrabromobisphenol A, and
- (c) from 0.1 to about 0.5 part by weight of antimony trioxide, the weight ratio of bromine atoms/antimony atoms in the resin composition ranging from 6 to 20.
Dependencies are inferred from the claim text.