Prefoamed particles of crosslinked propylene-type resin and mold

Details Prefoamed particles of crosslinked propylene-type resin and mold Prefoamed particles of crosslinked propylene-type resin and mold

1985-02-12

1986-10-14

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, 521143, C08J 922

Patent

active

046173234

ABSTRACT:
Prefoamed crosslinked propylene-type resin particles prepared by using as a base resin a propylene random copolymer whose amount of heat of crystallization determined by a DSC method is 19 to 10 cal/g. The prefoamed particles have a gel fraction of 1 to 65%. Also provided is a molded article of a crosslinked propylene-type resin which is a fused aggregate of the aforesaid prefoamed particles in which the number of cells, N per mm.sup.2, and the density, d (g/cm.sup.3), have the relation represented by the expression 2<N.sup.1/2 /d.sup.1/3 <45.

REFERENCES:
patent: 4379859 (1983-04-01), Hirosawa et al.
patent: 4399087 (1983-08-01), Akiyama et al.
patent: 4415680 (1983-11-01), Ushirokawa
patent: 4436840 (1984-03-01), 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.

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