Claims
- 1. A water-based pigment dispersion comprising 100 parts by weight of a pigment, 0.1 to 30 parts by weight of a pigment dispersing agent of the formula (1) and 5 to 500 parts by weight, as a solid content, of a water-based resin which is obtained by copolymerizing 5 to 20% by weight of an .alpha., .beta.-ethylenically unsaturated carboxylic acid (a), 5 to 50% by weight of an .alpha., .beta.-ethylenically unsaturated, nitrogen-containing monomer (b) and 30 to 90% by weight of an .alpha., .beta.-ethylenically unsaturated monomer (c) other than the .alpha., .beta.-ethylenically unsaturated carboxylic acid (a) and the .alpha., .beta.-ethylenically unsaturated, nitrogen-containing monomer (b),
- P--[X--Y--Z--N(R.sup.1)R.sup.2 ].sub.n ( 1)
- wherein:
- P is an organic dyestuff residue or a heterocyclic ring residue,
- X is a divalent binding group consisting of 2 to 15 atoms selected from S, C, N, O and H atoms,
- Y is a direct bond, --N(R)-- in which R is H, an alkyl group having 1 to 18 carbon atoms or Q--N(R.sup.3)R.sup.4 in which Q is an alkylene group having 1 to 6 carbon atoms and each of R.sup.3 and R.sup.4 is independently an optionally substituted alkyl group having 1 to 18 carbon atoms or R.sup.3 and R.sup.4 are together forming an optionally substituted heterocyclic ring which may contain N, O or S, or --O--,
- Z is an alkylene group having 1 to 6 carbon atoms, and each of R.sup.1 and R.sup.2 is independently an optionally substituted alkyl group having 1 to 18 carbon atoms or R.sup.1 and R.sup.2 are together forming an optionally substituted heterocyclic ring which may contain N, O or S, and
- n is an integer of 1 to 3.
- 2. A water-based pigment dispersion according to claim 1, wherein the .alpha., .beta.-ethylenically unsaturated, nitrogen-containing monomer (b) is at least one member selected from the group consisting of aminoalkyl (meth)acrylates and monoalkyl- or dialkyl-substituted compounds thereof, aminoalkyl(meth)acrylamides and monoalkyl- or dialkyl-substituted compounds thereof, and (meth)acrylamides.
- 3. A water-based pigment dispersion according to claim 1, wherein the .alpha., .beta.-ethylenically unsaturated monomer (c) is at least one member selected from the group consisting of alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates and vinyl aromatic compounds.
- 4. A water-based pigment dispersion according to claim 1, wherein the water-based resin is an acrylic copolymer resin which is soluble in an aqueous medium containing 50% by weight or less of a water-miscible organic solvent.
- 5. A water-based pigment dispersion according to claim 4, wherein the acrylic copolymer resin has an acid value of 1 to 200 and a weight average molecular weight of 5,000 to 300,000.
- 6. A water-based pigment dispersion according to claim 1, wherein the pigment is a phthalocyanine pigment and P in the formula (1) for the pigment dispersing agent is a phthalocyanine residue.
- 7. A water-based pigment dispersion according to claim 1, wherein the pigment is a quinacridone pigment and P in the formula (1) for the pigment dispersing agent is a quinacridone residue.
- 8. A water-based pigment dispersion according to claim 1, wherein X is a divalent binding group selected from the class consisting of --SO.sub.2 --, --CO--, --CH.sub.2 -- and --CH.sub.2 NHCOCH.sub.2 --.
- 9. A water-based pigment dispersion according to claim 1, wherein the water-based resin is contained in an amount of 5 to 200 parts by weight as a solid content.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-38445 |
Feb 1993 |
JPX |
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Parent Case Info
This application is a continuation-in-part of now abandoned application Ser. No. 08/201,027 filed Feb. 14, 1994, abandoned.
US Referenced Citations (6)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
201027 |
Feb 1994 |
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