Continuous process for the manufacture of quick-setting phenolic

Details Continuous process for the manufacture of quick-setting phenolic Continuous process for the manufacture of quick-setting phenolic

1982-05-14

1984-01-03

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521121, 521181, C08J 914

Patent

active

044242891

ABSTRACT:
A continuous process for manufacturing quick-setting phenolic foams is improved by using as the hardening agent a concentrated, substantially anhydrous solution of boron trioxide, and using as the blowing agent an organic liquid having a boiling point of 20.degree.-80.degree. C. Curing times are shortened and the resultant foam, having uniformly molecularly dispersed therein about 0.25-10.5% by weight of boron, calculated as boric anhydride, has substantially uniform cells, improved fire resistance characteristics and superior mechanical properties.

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