Foaming of unsaturated polyester resin at elevated temperatures

Details Foaming of unsaturated polyester resin at elevated temperatures Foaming of unsaturated polyester resin at elevated temperatures

1986-05-21

1987-01-13

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 96, 521 99, 521128, 521138, C08J 910

Patent

active

046365281

ABSTRACT:
Low density foams are prepared from an admixture which comprises an unsaturated polyester resin, a free radical initiator which initiator is activated at temperatures from about 100.degree. to about 400.degree. F., and a compound selected from a t-alkylhydrazinium salt or a carbonylhydrazine. The low density foams have uniform cell structure without cracks or voids and the process is efficient.

REFERENCES:
patent: 4322502 (1982-03-01), Stott et al.
patent: 4393148 (1983-07-01), Kamens
patent: 4397965 (1983-08-01), Stott
patent: 4435525 (1983-03-01), Kamens

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