Thermoplastic polymer composition

Details Thermoplastic polymer composition Thermoplastic polymer composition

1993-09-08

1995-05-30

Hamilton, III, Thomas

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 71, C08F26502, C08F27904, C08L 7112

Patent

active

054202000

ABSTRACT:
The invention relates to a thermoplastic polymer composition comprising a polyphenylene oxide; a graft copolymer (A), comprising a copolymer of a vinyl-aromatic compound, a vinyl cyanide and optionally a third monomer and a rubber, whereby the rubber is grafted on the backbone to the copolymer; and a graft copolymer (B) having polystyrene chains grafted on a copolymer backbone which contains units of a vinyl-aromatic compound and units of an .alpha.,.beta.-unsaturated dicarboxylic anhydride. The presence of graft copolymer (B) in the polymer composition causes a significant improvement of the notched impact resistance.

REFERENCES:
patent: 4167539 (1979-09-01), Heilman et al.
patent: 4234701 (1980-11-01), Abolins et al.
patent: 4405753 (1983-09-01), Deets et al.
patent: 4753991 (1988-06-01), Bronstert

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