Polyurethanes derived from novel novolak polyols

Details Polyurethanes derived from novel novolak polyols Polyurethanes derived from novel novolak polyols

1976-04-28

1978-07-25

Marquis, Melvyn I.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 73, C08G 1828

Patent

active

041028287

ABSTRACT:
Covers a method of producing polyurethanes formed as the reaction product of polyisocyanates and an alkoxylated novolak. Said novolak is the condensation product of a monohydric phenol and a 1,3-dioxane falling within the following structural formula: ##STR1## where R is selected from the group consisting of phenyl, substituted phenyl and gem dialkyl, and R.sub.1 is selected from the group consisting of hydrogen, alkyl, phenyl, and substituted phenyl. Also covers polyurethanes derived therefrom, and particularly rigid polyurethane foams.

REFERENCES:
patent: 3767624 (1973-10-01), Clarke
patent: 3817938 (1974-06-01), Ashida et al.
Lesage et al. - Bull. Soc. Chim. Fr. (11) 4147-4151, (1969).

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