Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2006-01-30
2010-02-16
Choi, Ling-Siu (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S356000
Reexamination Certificate
active
07662878
ABSTRACT:
The present invention is to provide an orange ink composition for inkjet recording high in color saturation and gloss, while having long storage stability and jet stability, and also to provide an aqueous pigment dispersion mainly composing the ink composition. The aqueous pigment dispersion which contains a styrene-acrylic acid copolymer containing 60% by mass or more of styrene-based monomer units with respect to total monomer components and having an acid value of 130 to 200 and a weight-average molecular weight of 6,000 to 40,000, an alkali metal hydroxide, a wetting agent and C. I. Pigment Red 168 is excellent in storage stability and high in gloss. Further, an ink composition for inkjet recording mainly composing the aqueous pigment dispersion reflects an excellent dispersibility of the aqueous pigment dispersion, thereby having a favorable jettability and excellent light fastness.
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Idemura Satoshi
Uezono Tomoyuki
Chin Hui
Choi Ling-Siu
Dainippon Ink and Chemicals Inc.
Westerman Hattori Daniels & Adrian LLP
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