Patent ID: 7449515
Filing Date: 2008-11-11
Classification: C08G,C09D

Abstract:
1. A phase change ink comprising a colorant, an initiator, and a phase change ink carrier, said carrier comprising (A) a first isocyanate-derived compound which is the reaction product of a mixture comprising (1) an isocyanate; and (2) a component comprising (a) an alcohol having at least one ethylenic unsaturation; (b) an amine having at least one ethylenic unsaturation; (c) an acid having at least one ethylenic unsaturation; or (d) mixtures thereof, (B) a second isocyanate-derived compound which is the reaction product of (1) a diisocyanate; (2) a monoalcohol having exactly one hydroxyl group and having at least one ethylenic unsaturation; and (3) a polyol having two or more hydroxyl groups, (C) an optional phase change inducing component, said phase change inducing component containing at least one hydroxyl group, said phase change inducing component having a melting point of about 40° or higher, and (D) an optional curable viscosity modifying ester, said ink being curable upon exposure to ultraviolet radiation, provided that at least one of (I) or (II) is true; (I) the monoalcohol having exactly one hydroxyl group and having at least one ethylenic unsaturation is a vinyl ether of the formula wherein R 33 is (i) an alkyl group, including linear and branched, saturated and unsaturated, cyclic and acyclic, and substituted and unsubstituted alkyl groups, and wherein hetero atoms either may or may not be present in the alkyl group, (ii) an aryl group, including substituted and unsubstituted aryl group, and wherein hetero atoms either may or may not be present in the aryl group, (iii) an arylalkyl group, including substituted and unsubstituted arylalkyl groups, wherein the alkyl portion of the arylalkyl group can be linear or branched, saturated or unsaturated, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms either may or may not be present in either the aryl or the alkyl portion of the arylalkyl group, or (iv) an alkylaryl group including substituted and unsubstituted alkylaryl groups, wherein the alkyl portion of the alkylaryl group can be linear or branched, saturated or unsaturated, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms either may or may not be present in either the aryl or the alkyl portion of the alkylaryl group, or (II) the ink contains a curable viscosity modifying ester of the formula wherein R a is (i) an alkyl group, including linear and branched, cyclic and acyclic, and substituted and unsubstituted alkyl groups, and wherein hetero atoms either may or may not be present in the alkyl group, (ii) an arylalkyl group, including substituted and unsubstituted arylalkyl groups, wherein the alkyl portion of the arylalkyl group can be linear or branched, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms either may or may not be present in either aryl or the alkyl portion of the arylalkyl group, or (iii) an alkylaryl group, including substituted and unsubstituted alkylaryl group, wherein the alkyl group portion of the alkylaryl group can be linear or branched, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms either may or may not be present in either the aryl or alkyl portion of the alkylaryl group, and herein R b is (i) an alkyl group having at least one ethylenic unsaturation therein, including linear and branched, cyclic and acyclic, and substituted and unsubstituted alkyl groups, and wherein hetero atoms either may or may not be present in the alkyl group, (ii) an arylalkyl group having at least one ethylenic unsaturation therein, including substituted and unsubstituted arylalkyl groups, wherein the alkyl portion of the arylalkyl group can be linear or branched, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms either may or may not be present in either the aryl or the alkyl portion of the arylalkyl group, or (iii) an alkylaryl group having at least one ethylenic unsaturation therein, including substituted and unsubstituted alkylaryl groups, wherein the alkyl portion of the alkylaryl group can be linear or branched, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms either may or may not be present in either aryl or alkyl portion of the alkylaryl group.