Water base ink for ink-jet recording and method for...

Details Water base ink for ink-jet recording and method for... Water base ink for ink-jet recording and method for...

2007-07-24

2007-07-24

Lorengo, J. A. (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031890, C106S031580, C106S031860

Reexamination Certificate

active

10668078

ABSTRACT:
A water base ink for ink-jet recording is provided, which is excellent in time-dependent stability of ink characteristics, which can be stably jetted over a long period of time, and which makes it possible to perform the high quality recording. The water base ink for ink-jet recording contains a self-dispersing type water-insoluble particulate coloring agent, a compound represented by the following formula (1), a surfactant having a nitrogen atom in a molecule, water, and a water-soluble organic solvent, wherein a surface tension is 30 to 50 mN/m, and a ratio of change of the surface tension after storage at 60° C. for 2 weeks is less than 5%:in-line-formulae description="In-line Formulae" end="lead"?R1—O—(CH2CH2O)x—SO3Na  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein R1represents an alkyl group and x is 20 to 30 in the formula (1).

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patent: 2002/0038614 (2002-04-01), Momose
patent: 0 924 272 (1999-06-01), None
patent: 11-263930 (1999-09-01), None
Machine Translation of JP 10-140065, May 1998.

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