Water base ink set for ink-jet recording

Details Water base ink set for ink-jet recording Water base ink set for ink-jet recording

Filed on

2005-02-08

Date issued

2005-02-08

Examiner

Bell, Mark L. (Department: 1755)

Patent Class

Compositions: coating or plastic

SubClass

Coating or plastic compositions

SubSubClass

Marking

Other Related Categories

C106S031860

Type

Reexamination Certificate

Status

active

Patent number

06852155

Description

ABSTRACT:
A water base ink set for ink-jet recording comprises a black ink which contains a black pigment, water, and a water-soluble organic solvent, and a color ink which contains a dye, water, a water-soluble organic solvent, and at least one compound represented by the following formulas (1) to (3), wherein the nozzle clog-up at an ink-jet head and the malfunction of a purging pump, which would be otherwise caused by the aggregation of the black ink, can be avoided:in-line-formulae description="In-line Formulae" end="lead"?R1—O—(CH2CH2O)x—SO3.Na  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein R1represents a straight chain alkyl group having a number of carbon atoms of 16 to 22, and x=20 to 30 is satisfied in the formula (1);wherein l+m+n+o+p+q=20 to 100 is satisfied in the formula (2); andwherein R2represents a straight chain alkyl group having a number of carbon atoms of 16 to 22, and y=100 to 300 is satisfied in the formula (3).

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