Ink composition for ink jet printer
AssigneeSeiko Epson Corporation
InventorsKazuaki Watanabe, Shinichi Kato, Bunji Ishimoto
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Abstract
To provide an aqueous ink composition which, without impairing ejection stability, is excellent in light-fastness and water-fastness, does not cause cohesion differential, gloss differential, bronzing phenomenon, color-bleeding, and the like, and has improved fixing ability and coloring property. An aqueous ink composition comprising at least water, a pigment dispersed by polymer, a sulfonyl group-containing (co)polymer, and an ultra-penetrating agent.
Claims2
An aqueous ink composition comprising at least water, a first polymer, a second polymer or copolymer which is a sulfonyl group-containing (co)polymer, a pigment dispersed by the first polymer, and an ultra-penetrating agent, wherein the sulfonyl group-containing (co)polymer is present in the form of an emulsion, and wherein the ultra-penetrating agent is a combination of a compound represented by the following formula (1) and triethylene glycol monobutyl ether:
- wherein, 0≦m+n≦50, and R1, R2, R3 and R4 each independently is an alkyl group, wherein the sulfonyl group-containing (co)polymer is a non-diene-based, sulfonyl group-containing (co)polymer, which is an acryl-based, sulfonyl group-containing (co)polymer.
Dependencies are inferred from the claim text.