Aqueous ink composition and method of manufacturing the same

Details Aqueous ink composition and method of manufacturing the same Aqueous ink composition and method of manufacturing the same

2011-07-19

2011-07-19

Wu, David (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S556000, C524S560000, C347S100000, C347S107000, C106S031600

Reexamination Certificate

active

07981947

ABSTRACT:
An aqueous ink composition comprising: a pigment, having a particle diameter as determined by the light scattering method of no less than 20 nm and no more than 200 nm; and a water dispersible polymer, having a styrene-equivalent number average molecular weight of as determined by gel permeation chromatography no less than 5000 and no more than 200000, having a surface tension of no less than 20 mN/m and no more than 40 mN/m, and wherein the abovementioned pigment is a polymer-coated pigment that is coated with the abovementioned water dispersible polymer, is provided. The water-dispersible polymer may be a copolymer of monomers, mainly comprising acrylic acid and/or methacrylic acid and an acrylate and/or methacrylate. With this ink composition, the printing quality can be improved.

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