Thermal ink-jet exhibiting reduced kogation
AssigneeJetFill, Inc.
InventorsAkin H. Davulcu, Salman Rashid, James D. Story
Life of this patent
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Abstract
A composition for use as an ink in thermal ink-jet printers comprising water, a compatible colorant, and certain 2-substituted 1,3-propanediols as humectants, the compositions providing a substantially kogation-free ink.
Claims11
A thermal ink-jet ink comprising water, a compatible colorant, and from about 2% to about 20% by weight of a humectant selected from the group consisting of compounds having the formula:
- ##STR3## wherein X can be an alkyl group having from 1 to 3 carbon atoms, --NH.sub.2, --CH.sub.2 NH.sub.2, and a cyclic ether moiety, and mixtures of such compounds.
A method of reducing kogation in an ink used in thermal ink-jet printers, said ink comprising water and a compatible colorant, characterized in that there is incorporated into said ink an effective amount of a humectant selected from the group consisting of compounds having the formula:
- ##STR4## wherein X can be an alkyl group having from 1 to 3 carbon atoms, --NH.sub.2, --CH.sub.2 NH.sub.2 and a cyclic ether moiety, and mixtures of such compounds.
Dependencies are inferred from the claim text.