Patent ID: 7915321
Filing Date: 2011-03-29
Classification: C08G,C09D

Abstract:
1. A dual cure aqueous dispersion comprising at least one polyurethane polymer, the polyurethane polymer comprising on average: (i) at least one primary carbamate group; (ii) more than five groups that are at least one of a methacrylate group, an acrylate group, or a mixture thereof; and (iii) at least one dispersive ionic functional group; wherein the dual cure aqueous dispersion cures via the application of both heat and actinic radiation and further wherein the at least one primary carbamate group is separated from all of the groups of (ii) by at least 8 chemical bonds prior to curing; and wherein the polyurethane polymer is prepared by a process comprising reacting: (A) at least one aliphatic polyisocyanate having an isocyanate functionality of from 2.0 to 6.0; (B) at least one compound comprising at least one isocyanate-reactive functional group and at least one of a methacrylate group, an acrylate group, or a mixture thereof; (C) at least one low molecular weight aliphatic compound comprising a plurality of isocyanate-reactive functional groups; (D) at least one compound comprising at least one isocyanate-reactive functional group and at least one dispersive potentially ionic, functional group; (E) at least one neutralizing agent for the dispersive potentially ionic functional groups of the compound (D); and (F) at least one compound comprising: (G) optionally, at least one compound comprising an isocyanate-reactive functional group, other than the compounds (B) to (F), wherein said groups (i), (ii), and (iii) in said polyurethane polymer correspond to groups in the reactant compounds (F), (B), and (D), respectively, and wherein the isocyanate-reactive groups in compounds (B), (C), (D), and (F) form urethane linkages in the polyurethane polymer.