PIGMENTED PHASE CHANGE INKS CONTAINING LOW MOLECULAR WEIGHT QUATERNARY AMMONIUM SALT DISPERSANTS

A pigmented phase change ink composition comprising an ink vehicle, a dispersant, and pigment particles wherein the dispersant is a chemical compound of formula: wherein R1 is an alkyl group, aryl group, alkylaryl group or arylalkyl group with at least 23 carbon atoms, R2 is an alkylene group, aryle...

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Bibliographische Detailangaben
Hauptverfasser: GOREDEMA ADELA, WONG RAYMOND, KAO SHEAU VAN, BIRAU MIHAELA MARIA, ALLEN C. GEOFFREY, WAGNER CHRISTOPHER, TUREK CAROLINE M
Format: Patent
Sprache:eng
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Zusammenfassung:A pigmented phase change ink composition comprising an ink vehicle, a dispersant, and pigment particles wherein the dispersant is a chemical compound of formula: wherein R1 is an alkyl group, aryl group, alkylaryl group or arylalkyl group with at least 23 carbon atoms, R2 is an alkylene group, arylene group, alkylarylene group or arylalkylene group with at least 2 carbons and X is a quaternary ammonium salt. The ink can be resistant to substantial aggregation and settling of the pigment particles in the melt and even when exposed to freeze thaw cycles.