Patent ID: 9580615
Date: 2017-02-28
CPC Classifications: B41J,C09D

Claim:
1. A phase change ink comprising: an amorphous compound, wherein the amorphous compound comprises an ester of citric acid of Formula II wherein each R 3 , R 4 and R 5 is independently an alkyl group, wherein the alkyl is straight, branched or cyclic, saturated or unsaturated, substituted or unsubstituted, having from 1 to 40 carbon atoms or a substituted or unsubstituted aromatic or heteroaromatic group, and mixtures thereof, wherein amorphous compound having a low viscosity of from 1 to 100 cps at ≦140° C.; a crystalline compound, wherein the crystalline compound comprises the following formula: wherein Q is —(CH 2 ) n — wherein n is 4 to 8; each R 15 and R 16 , is independently selected from benzyl, 2-phenylethyl, 2-phenoxyethyl, C 6 H 5 (CH 2 ) 4 —, cyclohexyl, 2-methylcyclohexyl, 3-phenylpropanyl, 3-methylcyclohexyl, 4-methylcyclohexyl, cyclohexylmethyl, 2-methylcyclohexylmethyl, 3-methylcyclohexylmethyl, 4-methylcyclohexylmethyl, and 4-ethylcyclohexanyl; i is 1; j is 1; p is 1 to 4; q is 1 to 4; the crystalline compound further comprises a compound selected from the group consisting of diphenyl sulfone, dimethyl sulfone, bis(4-hydroxyphenyl) sulfone, bis(4-aminophenyl) sulfone, bis(3-aminophenyl) sulfone, bis(4-chlorophenyl) sulfone, bis(4-fluorophenyl) sulfone, 2-hycroxyphenyl-4-hydroxyphenyl sulfone, phenyl-4-chlorophenyl sulfone, phenyl-2-aminophenyl sulfone, bis(3-amino-4-hydroxyphenyl) sulfone, dibenzyl sulfone, methylethyl sulfone, diethyl sulfone, methylisopropyl sulfone, ethylisopropyl sulfone, di-n-butyl sulfone, divinyl sulfone, methyl-2-hydroxymethyl sulfone, methylchloromethyl sulfone, sulfolane, 3-sulfolene, and mixtures thereof; and an inorganic nucleating agent, wherein the inorganic nucleating agent is present in the amount of from 1 to 3 eight percent based on the total weight of the phase change ink; wherein the phase change ink crystallizes faster from the liquid state than the same composition without the inorganic nucleating agent.