Pre-expanded particles of propylene resin

Details Pre-expanded particles of propylene resin Pre-expanded particles of propylene resin

1987-05-26

1988-01-19

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 59, 521 60, C08J 922

Patent

active

047205091

ABSTRACT:
A pre-expanded particle of a propylene resin having two melting temperatures as determined by DSC, the heat of fusion for the peak based on the higher melting temperature being 0.5 to 2.3 cal/g. By using the pre-expanded particles of the propylene resin of the invention, foamed articles having excellent surface appearance, small dimentional shrinkage can be easily obtained without the procedure for giving the internal pressure.

REFERENCES:
patent: 4399087 (1983-08-01), Akiyama et al.
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: 4602047 (1986-07-01), Endo

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