Polypropylene foamed particles

Details Polypropylene foamed particles Polypropylene foamed particles

1985-10-22

1986-12-02

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 58, 521 60, 521134, 521143, C08J 922

Patent

active

046265554

ABSTRACT:
Substantially non-crosslinked polypropylene resin foamed particles having a bulk density of from 8 to 100 g/l and a particle diameter of from 1 to 5 mm, the polypropylene resin is composed of from 5 to 30% by weight of a room-temperature xylene soluble matter having an ethylene content of from 20 to 80% by weight and from 70 to 95% by weight of a room-temperature xylene insoluble matter having a main melting peak temperature of from 130.degree. to 158.degree. C. The foamed particles provide a foamed product having well-balanced properties, such as low-temperature moldability, heat resistance, recovery from compression, and the like.

REFERENCES:
patent: 4379859 (1983-04-01), Hirosawa et al.
patent: 4399087 (1983-08-01), Akiyama et al.
patent: 4415680 (1983-11-01), Ushirokawa et al.
patent: 4436840 (1983-11-01), Akiyama et al.
patent: 4448901 (1984-05-01), Senda et al.
patent: 4464484 (1984-08-01), Yoshimura et al.
patent: 4504534 (1985-03-01), Adachi et al.
patent: 4504601 (1985-03-01), Kuwabara et al.

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