A one-component reactive polyurethane adhesive

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 175/04 (2006.01) C08G 18/10 (2006.01) C08G 18/18 (2006.01)

Patent

CA 2238412

Disclosed is a single-component polyurethane reaction adhesive based on at least one polyisocyanate, at least one oligomer compound which is reactive to isocyanate groups, and at least one catalyst. The proposed adhesive is characterised in that it contains at least one tertiary amine with at least one functional group for incorporation as a catalyst in the polymer chain, which brings the setting time down, and the shelf life up, to acceptable levels. With known catalysts, either the setting time is too long for practical applications or the shelf life is too short.

L'invention concerne un liant de réaction polyuréthane à un composant à base d'au moins un polyisocyanate, d'au moins un composé oligomère réagissant par rapport à des groupes isocyanate et d'au moins un catalyseur. Ce liant de réaction se caractérise en ce qu'il contient au moins une amine tertiaire comportant au moins un groupe fonctionnel, à incorporer comme catalyseur dans la chaîne polymère, ce qui permet de parvenir à un temps de durcissement, ainsi qu'à un temps de stockage acceptables. Les catalyseurs connus présentent le double inconvénient d'avoir des temps de durcissement trop longs pour des applications pratiques ou une stabilité au stockage insuffisante.

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