Voc-free or voc-poor polyurethane coating

Details Voc-free or voc-poor polyurethane coating Voc-free or voc-poor polyurethane coating

C - Chemistry, Metallurgy

08

G

C08G 18/12 (2006.01) C08G 18/48 (2006.01) C08G 18/75 (2006.01) C09D 175/00 (2006.01)

Patent

CA 2655235

The invention relates to humidity hardening compounds containing at least one polyurethane polymer, P, exhibiting an isocyanate group, at least one polyimine ALD of Formula (I) of at least 22% by weight, in relation to the sum of the components of the compound which contain the isocyanate group, as well as, if necessary, a polyisocyanate oligomer OP. The humidity hardening compound is particularly suitable for providing coatings and linings. The use of the imines makes possible VOC-free or VOC poor compounds, which is a substantial advantage for indoor applications.

L'invention concerne des compositions durcissant à l'humidité contenant au moins un polymère polyuréthane P présentant des groupes isocyanates, au moins une polyaldimine ALD de formule (I) d'au moins 22 % en poids par rapport à la somme des composants de la composition contenant des groupes isocyanates, et éventuellement un polyisocyanate oligomère OP. La composition durcissant à l'humidité est particulièrement appropriée pour la production de revêtements et d'enduits. L'utilisation d'aldimine permet des compositions sans COV ou pauvres en COV, ce qui constitue un avantage essentiel pour les utilisations intérieures.

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