Composition and method for curing a resorcinol resin

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 61/14 (2006.01) B32B 21/00 (2006.01) C08G 14/06 (2006.01) C08K 5/21 (2006.01) C08K 5/353 (2006.01) C08L 61/34 (2006.01) C09J 161/34 (2006.01) C08L 97/02 (2006.01)

Patent

CA 2236417

A catalyst curing system or hardener for resorcinolic resins, such as resorcinol-formaldehyde or phenol-resorcinol-formaldehyde resins including methylolurea. The methylolurea may be used in combination with oxazolidine in ratios ranging to 5:95 to 95:5, by molar basis. The hardener cross-links the resin which permits reduction or "fuming" of formaldehyde as well as control of gel times of the resulting adhesive. The hardener of the present invention if of particular utility in adhesives for use in the forest products industry.

L'invention se rapporte à un système de durcissement par catalyseur s'appliquant à des résines résorcinoliques telles que des résines résorcinol-formaldhéhyde ou phénol-résorcinol-formaldéhyde renfermant de la méthylolurée. La méthylolurée peut être utilisée en combinaison avec l'oxyzolidine dans des rapports compris entre 5:95 et 95:5, par base molaire. L'agent du durcissement réticule la résine qui permet la réduction ou le "fumage" du formaldhéhyde ainsi que la régulation des temps de gélification de l'adhésif obtenu. L'agent de durcissement de la présente invention est notamment utile dans les adhésifs qui sont utilisés dans l'industrie des produits forestiers.

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