Low voc, isocyanate based aqueous curable compositions

Details Low voc, isocyanate based aqueous curable compositions Low voc, isocyanate based aqueous curable compositions

C - Chemistry, Metallurgy

08

G

C08G 18/70 (2006.01) C08G 18/32 (2006.01) C08G 18/62 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2321524

Provided is a low volatile organic content (VOC), isocyanate based curable oil- in-water emulsion of a polyisocyanate crosslinker and a surface active isocyanate reactive material in an aqueous medium, and a process for the preparation thereof. Also provided is a water-in-oil intermediate product to which an aqueous medium can be added to produce the curable oil-in-water emulsion. Such curable emulsions are particularly suited for use in coatings applications.

L'invention porte sur une émulsion aqueuse durcissable, à base d'isocyanates et à faible teneur en composé organique volatil, constituée, dans un milieu aqueux, d'un agent de réticulation aux polyisocyanates et d'une substance tensio-active réagissant avec les isocyanates, ainsi que sur son procédé de fabrication. Elle concerne également un produit intermédiaire aqueux auquel un milieu aqueux peut être ajouté, de sorte que les émulsions aqueuses durcissables de l'invention soient produites. Lesdites émulsions durcissables conviennent particulièrement à l'utilisation dans des applications de revêtements.

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