Non-aqueous pigment ink
AssigneeRisco Kagaku Corporation
InventorsShunsuke Uozumi, Ayako Mochizuki
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Abstract
A non-aqueous pigment ink comprising a pigment, a pigment dispersant and a non-aqueous solvent, wherein the pigment dispersant is an acrylic polymer comprising, as constituent monomers, (M1) an alkyl (meth)acrylate having an alkyl group of 12 or more carbon atoms, (M2) a (meth)acrylic acid derivative having an amino group, and (M3) (meth)acrylic acid and/or a (meth)acrylic acid derivative having a carboxyl group, in which a combination of all the constituent monomers comprises from 8 to 15 mol % of the monomer (M2) and from 0.6 to 8 mol % of the monomer (M3), and the molar ratio (M2)/(M3) between the monomer (M2) and the monomer (M3) is within a range from 1.3 to 15.
Claims3
A non-aqueous pigment ink comprising a pigment, a pigment dispersant and a non-aqueous solvent, wherein
- the pigment dispersant is an acrylic polymer comprising, as constituent monomers,
- (M1) an alkyl (meth)acrylate having an alkyl group of 12 or more carbon atoms,
- (M2) a (meth)acrylic acid derivative having an amino group, and
- (M3) (meth)acrylic acid and/or a (meth)acrylic acid derivative having a carboxyl group,
- in which a combination of all the constituent monomers comprises from 8 to 15 mol % of the monomer (M2) and from 0.6 to 8 mol % of the monomer (M3), and the molar ratio (M2)/(M3) between the monomer (M2) and the monomer (M3) is within a range from 1.3 to 15.
A pigment dispersant for a non-aqueous pigment ink composed of an acrylic polymer comprising, as constituent monomers:
- (M1) an alkyl(meth)acrylate having an alkyl group of 12 or more carbon atoms,
- (M2) a (meth)acrylic acid derivative having an amino group, and
- (M3) (meth)acrylic acid and/or a (meth)acrylic acid derivative having a carboxyl group, wherein
- a combination of all the constituent monomers comprises from 8 to 15 mol % of the monomer (M2) and from 0.6 to 8 mol % of the monomer (M3), and the molar ratio (M2)/(M3) between the monomer (M2) and the monomer (M3) is within a range from 1.3 to 15.
Dependencies are inferred from the claim text.