Flame-retardant benzylic-ether phenolic modified foam and...

Details Flame-retardant benzylic-ether phenolic modified foam and... Flame-retardant benzylic-ether phenolic modified foam and...

C - Chemistry, Metallurgy

08

G

403/46

C08G 18/50 (2006.01) C08G 18/14 (1985.01)

Patent

CA 1198550

ABSTRACT A method of preparing a flame-retardant benzylic-ether phenolic modified foam product and the resulting foam product produced thereby, which method comprises reacting and mixing benzylic-ether phenol-formaldehyde resin, having a hydroxyl number of from about 400 to 600, with from about 50 to 150 parts by weight of a boric-acid catalyst to each 100 parts of the resin, op- tionally in the presence of melamine, to form a resin prepolymer, and, there- after, reacting the prepolymer so formed, in the presence of a blowing agent and an organometal catalyst, with a methylene diisocyanate in an exothermic reaction, to provide a nonfriable, substantially closed-cell, flame-retardant benzylic-ether phenolic modified foam product characterized by substantially acid methylene linkages in the resulting thermosetting foam product.

416633

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