Process for foaming a polymerizable medium using acid sensitive

Details Process for foaming a polymerizable medium using acid sensitive Process for foaming a polymerizable medium using acid sensitive

1978-06-05

1979-09-11

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521123, 521128, 521138, 521155, 521907, C08J 910

Patent

active

041676130

ABSTRACT:
In the foaming of a polymerizable medium (such as an unsaturated polyester resin) by using acid sensitive azo compounds, significant improvement in the foaming efficiency can be obtained by incorporating in the resin medium 0.001%-10% by weight based on the weight of the resin compounds which exert an inhibiting effect on free radical polymerization. Examples of such compounds include methacrylonitrile, alphamethylstyrene and laurylmercaptan.

REFERENCES:
patent: 3260688 (1966-07-01), Watanabe et al.
patent: 3823099 (1974-07-01), Doyle
patent: 3993609 (1976-11-01), Kamens et al.
patent: 4025502 (1977-05-01), MacLeary et al.

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