Heat resistant expandable plastic particles and molded articles

Details Heat resistant expandable plastic particles and molded articles Heat resistant expandable plastic particles and molded articles

1983-01-14

1984-03-20

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 57, C08J 918

Patent

active

044382227

ABSTRACT:
This invention produces heat resistant expandable plastic particles by the method of emulsion polymerization, containing .alpha.-alkylstyrene 15-55 weight %, another polymerizable monomer 85-45 weight %, and a readily volatile blowing agent 3-15 weight % as chief ingredients, and offers the expandable plastic molded articles with high heat resistance and high dimensional stability produced by prefoaming the expandable polymerizate particles with heating at a pressure of more than 0.1 kg/cm.sup.2 G followed by heat-molding in a metallic mold.

REFERENCES:
patent: 4017427 (1977-04-01), Granda et al.
patent: 4036794 (1977-07-01), Keppler et al.

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