Electrostatic ink jet ink and method of controlling electrostatic charges of color material in the ink
OwnerKenji Oshimainventor
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Abstract
An ink for ink jet printer comprising: a highly electrically insulating dispersant mainly comprising an aliphatic hydrocarbon solvent; a color material insoluble in the dispersant; a polymer having at least repeating units represented by the following general formula (1) and soluble in the dispersant, and a metal soap. The ink enables high-speed stable printing of high-density dots substantially free from ink bleeding. Moreover, the present invention provides a method of effectively controlling electrostatic charges of the color material in the ink. 1 wherein R1 is one of a hydrogen atom and a methyl group, and R2 is an alkyl group having 4 to 22 carbon atoms.
Claims7
An ink for ink jet printer comprising:
- a dispersant mainly comprising an aliphatic hydrocarbon solvent;
- a color material insoluble in said dispersant;
- a polymer including repeating units represented by the following general formula (1) and soluble in said dispersant;
- and
- a metal soap.
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- wherein R1 is one of a hydrogen atom and a methyl group, and R2 is an alkyl group having 4 to 22 carbon atoms.
A method of controlling electrostatic charge of a color material in an ink for ink jet printer comprising:
- adding, to said ink comprising a dispersant mainly comprising an aliphatic hydrocarbon solvent and said color material insoluble in said dispersant, a metal soap and a polymer having repeating units represented by the following general formula (1) and soluble in said dispersant.
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- wherein R1 is one of a hydrogen atom and a methyl group, and R2 is an alkyl group having 4 to 22 carbon atoms.
Dependencies are inferred from the claim text.