Non-aqueous ink composition
AssigneeRiso Kagaku Corporation
InventorsTeruaki Ohkawa, Osamu Matsumoto
Life of this patent
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Abstract
A non-aqueous ink composition includes pigment, solvent and dispersant. The dispersant has an ester structure and the solvent contains not smaller than 60% by weight polar organic solvent. The polar organic solvent contains not smaller than 10% by weight ester solvent.
Claims14
A non-aqueous ink composition comprising pigment, a solvent mixture and a dispersant, wherein the dispersant has an ester structure and the solvent mixture contains therein at least one polar organic solvent in an amount not smaller than 60% by weight based on the total weight of the solvent mixture, said at least one polar organic solvent containing therein an ester solvent in an amount not smaller than 10% by weight based on the total weight of said at least one polar organic solvent;
- wherein said ink composition has a viscosity of 2 to 30 mPas at 23° C.;
- and
- wherein the solvent mixture contains therein an aliphatic solvent.
A non-aqueous ink composition, comprising:
- a pigment;
- a solvent mixture, the solvent mixture comprising at least one polar organic solvent and a non-polar organic solvent with the at least one polar organic solvent containing an ester solvent,
- a dispersant having an ester structure;
- and
- a resin soluble with the polar organic solvent;
- wherein the polar organic solvent is 60% or greater by weight based on the total weight of the solvent mixture, the ester solvent is 10% or greater by weight based on the total weight of said polar organic solvent;
- and the solvent mixture contains therein an aliphatic solvent.
Dependencies are inferred from the claim text.