Preparation of polyurethane foams modified with...

Details Preparation of polyurethane foams modified with... Preparation of polyurethane foams modified with...

C - Chemistry, Metallurgy

08

G

403/32

C08G 18/54 (2006.01) C08G 12/32 (2006.01)

Patent

CA 1163049

Abstract of the Disclosure: A process for the prepara- tion of polyurethane foams modified with melamine- formaldehyde precondensates, in which the preconden- sates employed are storage-stable, aqueous 40-85% strength by weight resin solutions which are obtained by condensing melamine with formaldehyde in a molar ratio of 1:1.1 - 1.75 in aqueous solution at a pH which, at least periodically, is above 8, and at from 60 to 130°C, until one part by volume of resin solution can be diluted with from 0.5 to 4 parts by volume of water at 20°C without causing a persisting cloudiness.

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