Foams prepared from polypropylene resin composition and process

Details Foams prepared from polypropylene resin composition and process Foams prepared from polypropylene resin composition and process

1979-09-18

1981-11-03

Anderson, Philip

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 453, 264 53, 264DIG5, 264DIG16, 521 93, 521 97, 521140, 521908, 521909, B29D 2700

Patent

active

042987067

ABSTRACT:
Foams of polypropylene resin composition having remarkably improved extrusion foaming characteristics are prepared by a non-crosslinking extrusion foaming process comprising mixing and kneading polypropylene resin and 1,2-polybutadiene resin so that 1,2-polybutadiene resin reacts under the influence of the heat and shearing stress in the extruder, and extruding thereafter.

REFERENCES:
patent: 3231524 (1966-01-01), Simpson
patent: 3498963 (1970-03-01), Ichikawa et al.
patent: 3608006 (1971-09-01), Hosoda et al.
patent: 3696059 (1972-10-01), Hosoda et al.
patent: 3939237 (1976-02-01), Naito et al.
patent: 3981830 (1976-09-01), Takeuchi et al.

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