Expandable polymeric styrene particles

Details Expandable polymeric styrene particles Expandable polymeric styrene particles

1983-04-08

1984-01-31

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

427222, 521 56, 521 60, 521 88, C08J 922

Patent

active

044290586

ABSTRACT:
An improved expandable polymeric styrene particle is provided containing a blowing agent, a minor amount of pentaerythritol tetrastearate, overcoated with a minor amount of glyceryl monostearate. The improved particle results in a significantly reduced final mold cooling cycle in producing the finished molded article. Pentaerythritol tetrastearate is preferably incorporated during impregnation with the blowing agent and glyceryl monostearate overcoated by blending with the expandable particles after impregnation.

REFERENCES:
patent: 3789028 (1974-01-01), Heiskel
patent: 4238570 (1980-12-01), Shibata et al.
patent: 4304796 (1981-12-01), Spicuzza, Jr. et al.
patent: 4312957 (1982-01-01), Spicuzza, Jr.
patent: 4361656 (1982-11-01), Mostofa
patent: 4369227 (1983-01-01), Hahn et al.

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