Water dispersible polyisocyanate compositions

Details Water dispersible polyisocyanate compositions Water dispersible polyisocyanate compositions

C - Chemistry, Metallurgy

08

G

C08G 18/28 (2006.01) C08G 18/70 (2006.01) C08G 18/79 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2692985

Non aqueous water dispersible compositions comprising: I) polyisocyanates, which are made hydrophilic by reaction with a 1,3-or 1,2-nonionic diol containing one alkoxy-terminated polyoxyethylene and/or polyoxypropylene chain, II) one or more ethoxylated alcohol phosphates having at least one phosphoric group in acid form, and optionally III) a water miscible organic solvent, the compositions being useful as crosslinker for polyurethane aqueous dispersions.

La présente invention concerne des compositions non aqueuses hydrodispersables comprenant : I) polyisocyanates, qui sont rendus hydrophiles par une réaction avec un 1,3- ou 1,2-diol non ionique contenant une chaîne polyoxyéthylène et/ou polyoxypropylène terminée par un alcoxy, II) un ou des phosphates d'alcool éthoxylés ayant au moins un groupe phosphorique sous forme acide, et éventuellement III) un solvant organique miscible à l'eau, les compositions étant utiles comme agent de réticulation pour des dispersions aqueuses de polyuréthane.

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