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US 8,911,544 B2Granted
Phase change ink composition
AssigneeXerox Corporation
InventorsNaveen Chopra, Srinivasa Rangaraj Deshiikan, Daryl W. Vanbesien, Gabriel Iftime, Daniel Mark Platt
Life of this patent
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Abstract
A phase change ink composition including an amorphous compound; a crystalline compound; an optional synergist; an optional dispersant; and a white colorant having a volume average particle size of from about 25 nanometers to less than 200 nanometers.
Claims18
A phase change ink composition comprising:
- an amorphous compound;
- a crystalline compound;
- an optional synergist;
- an optional dispersant;
- and a white colorant having a volume average particle size of from about 25 nanometers to less than 200 nanometers;
- wherein the amorphous compound comprises a first ester of tartaric acid of the formula
- wherein each of R1,R2, R3, R4, and R5 is independently selected from an alkyl group, wherein the alkyl is straight, branched or cyclic, saturated or unsaturated, substituted or unsubstituted, having from about 1 to about 40 carbon atoms, or a substituted or unsubstituted aromatic or heteroaromatic group;
- and
- wherein the crystalline compound comprises a second ester of tartaric acid of the formula
- wherein each of R6 and R7 is independently selected from an aryl or a heteroaryl optionally substituted with a lower alkyl group, an alkoxy group, or a combination thereof, and wherein each n is independently selected from an integer from 0 to 3, or wherein the crystalline compound is a compound of the formula
7 more elements
A method for preparing a phase change ink composition comprising:
- combining an amorphous compound;
- a crystalline compound;
- an optional synergist;
- an optional dispersant;
- and a white colorant having a volume average particle size of from about 25 nanometers to less than 200 nanometers, with optional stifling, optional homogenizing, and optional heating, to provide a phase change ink composition;
- wherein the amorphous compound comprises a first ester of tartaric acid of the formula
- wherein each of R1, R2, R3, R4, and R5 is independently selected from an alkyl group, wherein the alkyl is straight, branched or cyclic, saturated or unsaturated, substituted or unsubstituted, having from about 1 to about 40 carbon atoms, or a substituted or unsubstituted aromatic or heteroaromatic group;
- and
- wherein the crystalline compound comprises a second ester of tartaric acid of the formula
- wherein each of R6 and R7 is independently selected from an aryl or a heteroaryl optionally substituted with a lower alkyl group, an alkoxy group, or a combination thereof, and wherein each n is independently selected from an integer from 0 to 3, or wherein the crystalline compound is a compound of the formula
7 more elements
A process comprising:
- (1) incorporating into an ink jet printing apparatus a phase change ink composition comprising an amorphous compound;
- a crystalline compound;
- an optional synergist;
- an optional dispersant;
- an optional fluorescent dye;
- and a white colorant having a volume average particle size of from about 25 nanometers to less than 200 nanometers;
- wherein the amorphous compound comprises a first ester of tartaric acid of the formula
- wherein each of R1, R2, R3, R4, and R5 is independently selected from an alkyl group, wherein the alkyl is straight, branched or cyclic, saturated or unsaturated, substituted or unsubstituted, having from about 1 to about 40 carbon atoms, or a substituted or unsubstituted aromatic or heteroaromatic group;
- and
- wherein the crystalline compound comprises a second ester of tartaric acid of the formula
- wherein each of R6 and R7 is independently selected from an aryl or a heteroaryl optionally substituted with a lower alkyl group, an alkoxy group, or a combination thereof, and wherein each n is independently selected from an integer from 0 to 3, or wherein the crystalline compound is a compound of the formula
- (2) melting the ink;
- and
- (3) causing droplets of the melted ink to be ejected in an imagewise pattern onto a substrate.
11 more elements
A coated substrate comprising:
- a substrate and a phase change ink composition deposited thereover;
- wherein the phase change ink composition comprises an amorphous compound;
- a crystalline compound;
- an optional synergist;
- an optional dispersant;
- an optional fluorescent dye;
- and a white colorant having a volume average particle size of from about 25 nanometers to less than 200 nanometers
- wherein the amorphous compound comprises a first ester of tartaric acid of the formula
- wherein each of R1, R2, R3, R4, and R5 is independently selected from an alkyl group, wherein the alkyl is straight, branched or cyclic, saturated or unsaturated, substituted or unsubstituted, having from about 1 to about 40 carbon atoms, or a substituted or unsubstituted aromatic or heteroaromatic group;
- and
- wherein the crystalline compound comprises a second ester of tartaric acid of the formula
- wherein each of R6 and R7 is independently selected from an aryl or a heteroaryl optionally substituted with a lower alkyl group, an alkoxy group, or a combination thereof, and wherein each n is independently selected from an integer from 0to 3, or wherein the crystalline compound is a compound of the formula
9 more elements
An ink jet printer stick or pellet containing a phase change ink composition comprising an amorphous compound;
- a crystalline compound;
- an optional synergist;
- an optional dispersant;
- an optional fluorescent dye;
- and a white colorant having a volume average particle size of from about 25 nanometers to less than 200 nanometers
- wherein the amorphous compound comprises a first ester of tartaric acid of the formula
- wherein each of R1, R2, R3, R4, and R5 is independently selected from an alkyl group, wherein the alkyl is straight, branched or cyclic, saturated or unsaturated, substituted or unsubstituted, having from about 1 to about 40 carbon atoms, or a substituted or unsubstituted aromatic or heteroaromatic group;
- and
- wherein the crystalline compound comprises a second ester of tartaric acid of the formula
- wherein each of R6 and R7 is independently selected from an aryl or a heteroaryl optionally substituted with a lower alkyl group, an alkoxy group, or a combination thereof, and wherein each n is independently selected from an integer from 0 to 3, or wherein the crystalline compound is a compound of the formula
7 more elements
Dependencies are inferred from the claim text.