Flame retardant high impact p-methylstyrene compositions

Details Flame retardant high impact p-methylstyrene compositions Flame retardant high impact p-methylstyrene compositions

1982-11-15

1984-07-10

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524141, 524143, 524144, 525289, 525316, 525322, C08K 552, C08K 553

Patent

active

044593813

ABSTRACT:
The present invention provides a non-foamed flame-retardant article of polymeric composition comprising at least 20% by weight of a monomer mixture comprising 0-0.1% by weight o-methylstyrene 0-15% by weight m-methylstyrene and at least 85% by weight p-methylstyrene; 0-80% by weight of a different ethylenic unsaturated monomer; and a sufficient amount of flame-retardants wherein the amount of flame-retardants is substantially less than would be needed had the p-methylstyrene been replaced with styrene analogs. The flame retardancy is achieved by the addition of organophosphorus or halogenated organophosphorus flame retardants. High impact resistance is achieved by the incorporation of a rubbery polymer into the polymeric composition.

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patent: 4077934 (1978-03-01), Lee, Jr.
patent: 4166812 (1979-09-01), Lee, Jr.
patent: 4284733 (1981-08-01), Russo
patent: 4306049 (1981-12-01), Prapas

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