Polyisocyanate mixture

Details Polyisocyanate mixture Polyisocyanate mixture

C - Chemistry, Metallurgy

08

G

C08G 18/48 (2006.01) C08G 18/10 (2006.01) C08G 18/28 (2006.01) C08G 18/62 (2006.01) C08G 18/70 (2006.01) C08G 18/76 (2006.01) C08G 18/80 (2006.01) C09D 175/08 (2006.01)

Patent

CA 2069465

A polyisocyanate mixture which is emulsifiable in water comprising; (i) An isocyanate functional oligomer, which is the reaction product of; (a) a polyisocyanate having tertiary isocyanate groups, and (b) a hydrophilic polyether having a group which will react with tertiary isocyanate groups, and (ii) a polyisocyanate having tertiary isocyanate groups. The polyisocyanate mixtures can be used with suitable film-forming polymers to make aqueous coating compositions.

Mélange de polyisocyanate émulsifiable dans l'eau, comprenant : i) un oligomère fonctionnel, soit un isocyanate, qui est le produit de la réaction entre a) un polyisocyanate comptant des groupements isocyanate tertiaire et b) un polyéther hydrophile ayant un groupement qui réagira avec des groupements isocyanate tertiaire, et ii) un polyisocyanate présentant des groupements isocyanate tertiaire. Les mélanges de polyisocyanates peuvent être utilisés avec des polymères filmants appropriés pour produire des compositions de revêtement aqueuses.

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