Patent ID: 9365735
Filing Date: 2016-06-14
CPC Classification: C08F,C09D

Claim Text:
1. A non-aqueous pigment ink comprising a pigment, a non-aqueous solvent, and a non-aqueous resin that is in a dissolved state in the non-aqueous solvent and has a pigment dispersing ability; the non-aqueous solvent including a hydrocarbon based non-polar solvent at 50% by mass or more with respect to the total amount of solvent; the non-aqueous resin being an acrylic series polymer having a comb shaped structure and including, on a (meth)acrylate main chain, a side chain including an alkyl group, the alkyl group having a carbon number within a range from 8 to 18, and a side chain including an urethane group; the acrylic series polymer being a polymer obtained by, into a copolymer of a monomer mixture of an alkyl(meth)acrylate (A) having an alkyl group with a carbon number within a range from 8 to 18, a reactive (meth)acrylate (B) having a functional group capable of reacting with an amino group, and a monomer (C) having a β-diketone group or a β-keto acid ester group, introducing the urethane group by reactions between the functional group capable of reaction with an amino group, an amino alcohol, and a multivalent isocyanate compound; and the mass ratio between the copolymer moiety and the urethane group moiety in the acrylic series polymer being within a range from 80:20 to 99:1.