A polyurethane resin for color inks

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08G 18/75 (2006.01)

Patent

CA 2532037

The present invention is related to a polyurethane resin, obtainable by reacting 1-isocyanato-5-isocyanatomethyl-3,3,5-~trimethylcyclohexane (isophorone diisocyanate (IPDI) alone or together with one or more aliphatic diisocyanates, with a polyether polyol having an average molecular weight in the range of 1000 to less than 3000 g/mol; adding a diamine; adding a polyol having an average molecular weight of equal or less than 800 g/mol; and optionally reacting the product obtained in steps a) to c) with at least one terminating agent, wherein the ratio of equivalent weights of diisocyanates to the group of isocyanate-reactive components consisting of the said polyether polyol, the said diamine, the said polyol, and the said terminating agent is 1:1 or greater than 1.

L'invention concerne une résine polyuréthanne pouvant être obtenue : a) par réaction d'1-isocyanato-5-isocyanatométhyl-3,3,5-triméthylcyclohexane (diisocyanate d'isophorone) (IPDI) seul ou en combinaison avec un ou plusieurs diisocyanates aliphatiques, avec un polyol de polyéther présentant un poids moléculaire moyen dans la plage comprise entre 1000 et moins de 3000 g/mol ; b) par ajout d'une diamine ; c) par ajout d'un polyol présentant un poids moléculaire inférieur ou égal à 800 g/mol ; et d) éventuellement par réaction du produit obtenu dans les étapes a) à c) avec au moins un agent de terminaison, le rapport poids équivalents de diisocyanates-groupe de composants réactifs aux isocyanates comprenant ledit polyol de polyéther, ladite diamine, ledit polyol, et ledit agent de terminaison étant de 1:1 ou supérieur à 1.

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