Graft-modified copolymer and compounding agent for styrene-type

Details Graft-modified copolymer and compounding agent for styrene-type Graft-modified copolymer and compounding agent for styrene-type

1983-03-30

1984-12-25

Briggs, Sr., Wilbert J.

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

Synthetic resins

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

525 75, 525 70, 525 86, 525 87, 525290, 525322, 525324, C08F25504, C08F25506

Patent

active

044905084

ABSTRACT:
A graft-modified copolymer having a melt flow rate of 0.01 to 100 g/10 min at a temperature of 230.degree. C. under a load of 2160 g. The graft-modified copolymer is prepared by grafting (a) 100 parts by weight of low crystalline or amorphous ethylene-alpha-olefin copolymer having an ethylene content of 40 to 93 mole%, a melt flow rate of 0.1 to 50 g/10 min at a temperature of 230.degree. C. under a load of 2160 g, and a density of 0.90 g/cm.sup.3 or less with (b) 0.3 to 50 parts by weight of a styrene-type hydrocarbon. This graft-modified copolymer is suitable for use as a compounding agent for improving the impact resistance of styrene-type polymers without decreasing the surface hardness, weathering resistance, and molding properties thereof.

REFERENCES:
patent: 3489821 (1970-01-01), Witt et al.
patent: 3849518 (1974-11-01), Severini et al.
patent: 4054615 (1977-10-01), Hardt et al.

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