EP0068903B1
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Ink composition for ink jet printing
Assignee: Konica Minolta Inc
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Filing: 1982-06-30
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Granted: 1985-05-15
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Expires: 2002-06-30
Abstract
No abstract record available.
Inventors
- 👤 Tatsuhiko Kobayashi
- 👤 Shigehiro Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 22:59
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/106; C09D11/30
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
41 words
An ink composition for ink jet printing comprising vinyl polymer latex particles containing a hydrophobic dye and which are essentially insoluble in and non-swelling in water, an organic solvent having a hydrophilic-lipophilic balance of 9.5 or less, and an aqueous medium.
Claim 2
Dependent Claim
41 words
An ink composition for ink jet printing comprising vinyl polymer latex particles containing a hydrophobic dye and which are essentially insoluble in and non-swelling in water, an organic solvent having a hydrophilic-lipophilic balance of 9.5 or less, and an aqueous medium.
Claim 3
Dependent Claim
20 words
An ink composition according to Claim 1, in which the organic solvent has a hydrophilic-lipophilic balance of 7.0 to 9.5.
Claim 4
Dependent Claim
33 words
An ink composition according to Claim 1 or 2, in which the organic solvent is a monohydric or polyhydric alcohol or their derivatives, a cyclic ether or a lactone or a mixture thereof.
Claim 5
Dependent Claim
66 words
An ink composition according to any one of Claims 1 to 3, in which the vinyl polymer latex particles comprise a polymer of an acrylate, a methacrylate, an acrylamide, a methacrylamide, a vinyl ester, a vinyl halide, a vinylidene halide, a vinyl ether, a styrene, an α,β-ethylenically unsaturated monomer, an acrylonitrile, a diacrylate, a dimethacrylate, or a compound having a hydrophilic group or a mixture thereof.
Claim 6
Dependent Claim
18 words
An ink composition according to Claim 4, in which the compound having a hydrophilic group is a sulfonate.
Claim 7
Dependent Claim
14 words
An ink composition according to Claim 5, wherein the sulfonate is 2-methyl propane sulfonate-2-acrylamide.
Claim 8
Dependent Claim
22 words
An ink composition according to Claim 4, in which the compound having a hydrophilic group is a compound having a polyoxyethylene group.
Claim 9
Dependent Claim
38 words
An ink composition according to Claim 7 in which the compound having a polyoxyethylene group has the formula [I]: wherein R represents a hydrogen atom or a methyl group, and n is an integer of 1 to 10.
Claim 10
Dependent Claim
20 words
An ink composition according to Claim 4, in which the compound having a hydrophilic group is a quaternary ammonium salt.
Claim 11
Dependent Claim
47 words
An ink composition according to Claim 9, in which the quaternary ammonium salt has the formula [III: wherein R represents a hydrogen atom or a methyl group; R i , R 2 and R 3 independently represent a lower alkyl group; and X e represents an anion.
Claim 12
Dependent Claim
23 words
An ink composition according to any one of the preceding claims in which the vinyl polymer latex particles further contain a cross-linkable monomer.
Claim 13
Dependent Claim
16 words
An ink composition according to Claim 11, in which the cross-linkable monomer is a divinyl benzene.
Claim 14
Dependent Claim
28 words
An ink composition according to any one of the preceding claims in which the vinyl polymer latex particles are synthesized from a radical-polymerizable vinyl monomer by emulsion polymerization.
Claim 15
Dependent Claim
27 words
An ink composition according to any one of the preceding claims in which the vinyl polymer latex particles have a particle size of 0.01 to 1.0 pm.
Claim 16
Dependent Claim
23 words
An ink composition according to Claim 14, in which the vinyl polymer latex particles have a particle size of 0.02 to 0.5 um.
Claim 17
Dependent Claim
34 words
An ink composition according to any one of the preceding claims, in which the hydrophobic dye is a monoazo, an anthraquinone, a metal complex type monoazo, a diazo, a phthalocyanine or a triallylmethane dye.
Claim 18
Dependent Claim
18 words
An ink composition according to any one of the preceding claims, which further comprises a surface active agent.
Claim 19
Dependent Claim
40 words
An ink composition according to Claim 17, in which the surface active agent is a nonionic surface active agent or an ionic surface active agent having the same electrostatic charge as that of the surfaces of the polymer latex particles.
Claim 20
Dependent Claim
28 words
An ink composition according to Claim 17, in which the surface active agent is present in an amount of 0.05 to 1% by weight in the ink composition.
Claim 21
Dependent Claim
16 words
An ink composition according to any one of the preceding claims, which further comprises a buffer.
Claim 22
Dependent Claim
19 words
An ink composition according to CJaim 20, in which the buffer is an inorganic buffer or an organic buffer.
Claim 23
Dependent Claim
19 words
An ink composition according to CJaim 20, in which the buffer is an inorganic buffer or an organic buffer.
Claim 24
Dependent Claim
17 words
An ink composition according to Claim 20, in which the buffer is sodium carbonate or potassium carbonate.
Claim 25
Dependent Claim
31 words
An ink composition according to any one of Claims 20 to 22, in which the buffer is present in an amount of 0.1 to 5% by weight in the ink composition.
Claim 26
Dependent Claim
17 words
An ink composition according to any one of the preceding claims, which further comprises a chelating agent.
Claim 27
Dependent Claim
41 words
An ink composition according to Claim 24, in which the chelating agent is sodium glucinate, ethylenediamine tetraacetic acid (EDTA), a disodium salt of EDTA, a trisodium salt of EDTA, a tetrasodium salt of EDTA, or a sodium salt of diethylenetriaminopentaacetic acid.
Claim 28
Dependent Claim
29 words
An ink composition according to Claim 24 or 25, in which the chelating agent is present in an amount of 0.1 to 5% by weight in the ink composition.
References Cited (Backward Citations)
No citation records indexed.
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