Phenol-formaldehyde resins modified with guanidine salts

Details Phenol-formaldehyde resins modified with guanidine salts Phenol-formaldehyde resins modified with guanidine salts

C - Chemistry, Metallurgy

08

G

C08G 8/10 (2006.01) B27N 3/00 (2006.01) B32B 7/12 (2006.01) C08G 8/28 (2006.01) C08L 61/06 (2006.01) C09J 161/14 (2006.01) C08L 97/02 (2006.01)

Patent

CA 2226274

A guanidine-modified phenol-formaldehyde resole resin by reacting formaldehyde and phenol at a formaldehyde to phenol mole ratio above about 1.5:1 in the presence of an effective amount of an alkaline catalyst and in the presence of a catalytic amount of a guanidine salt. The resin is suitable for use in adhesives for high moisture content substrates.

Résol de phénol-formaldéhyde modifié par une guanidine; cette résine est obtenue par réaction du formaldéhyde et du phénol, à un rapport formaldéhyde/phénol supérieur à 1,5 environ, en présence d'une quantité efficace d'un catalyseur alcalin et d'un montant catalytique de sel de guanidine. La résine est utile pour les adhésifs destinés à des substrats à faible teneur en humidité.

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