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US 4,233,199 AGranted
Flame resistant thermoplastic compositions with well balanced physical properties
OwnerVisvaldis Abolins, Fred F. Holub +1inventors
InventorsVisvaldis Abolins, Fred F. Holub, Popkin R. Shenian
Life of this patent
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Abstract
The heat retardant properties of compositions comprising polyphenylene ether resins and styrene resins are significantly improved while maintaining a good overall balance of physical properties by including therein a combination of a flame retarding organophosphorus compound and a finely particulate solid material of a porous character.
Claims13
A thermoplastic composition comprising:
- (a) a polyphenylene ether resin;
- (b) a styrene type resin;
- (c) an organophosphorus compound having a melting point below about 100.degree. C. and which is stable and relatively non-volatile at temperatures up to at least about 300.degree. C.;
- and
- (d) a finely particulate solid filler having a relatively high absorption capacity for organic liquids.
2 more elements
A thermoplastic composition comprising:
- (a) from about 20 to about 90 parts by weight of a poly(2,6-dimethyl-1, 4-phenylene) ether resin;
- (b) from about 10 to about 80 parts by weight of a high impact styrene type resin;
- (c) from about 4 to about 25 parts by weight per 100 parts of (a) and (b) combined of an aryl organophosphorus compound which is liquid at temperatures below about 100.degree. C. and stable and relatively non-volatile at temperatures up to about 300.degree. C.;
- and
- (d) from about 2 to about 30 parts by weight of a finely particulate solid filler having an openly porous or expanded network structure capable of absorbing organic liquids in amounts about equal to its own weight.
2 more elements
Dependencies are inferred from the claim text.