Process for producing phenolic foams with a uniform appearance

Details Process for producing phenolic foams with a uniform appearance Process for producing phenolic foams with a uniform appearance

1978-09-20

1979-08-21

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521181, C08J 914

Patent

active

041654137

ABSTRACT:
Improved phenolic foams are produced having a more uniform cell structure, improved mechanical and thermal properties, and improved foam structure by foaming a phenol-aldehyde oligomer condensate such as a resole, an extended resole, or a mixture of a resole and a novolac resin in the presence of N-methyl-2-pyrrolidone.

REFERENCES:
patent: 3210300 (1965-10-01), Leiber et al.
patent: 3389094 (1968-06-01), D'Alesandro
patent: 3704269 (1972-11-01), Freeman et al.

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