Method for the preparation of highly absorbent phenolic resin fo

Details Method for the preparation of highly absorbent phenolic resin fo Method for the preparation of highly absorbent phenolic resin fo

1982-07-27

1984-01-17

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521121, 521125, 521181, C08J 914

Patent

active

044264623

ABSTRACT:
Improvement in the preparation of open-pored phenolic resin foams by the foaming of intimate mixtures of water-containing phenolic resol resins in the viscosity range of from 1000 to 20,000 cP, low-boiling organic liquids in which the phenolic resol resins are not soluble as blowing agents and acid-containing hardeners, the improvement comprising adding to the foamable phenolic resol resin before or during the preparation of the foamable mixture, 1.0 to 6.0 weight-percent of ethoxylated castor oil and 0.5 to 5 weight-percent of an alkyl sulfate salt of the general formula

REFERENCES:
patent: 3694387 (1972-09-01), Junger et al.
patent: 3779959 (1973-12-01), Pinten et al.
patent: 4216295 (1980-08-01), Dahms
patent: 4334971 (1982-06-01), Mahnke et al.

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