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US 8,044,116 B2Granted
Pigment dispersion, aqueous pigment liquid dispersion, and ink-jet recording ink
AssigneeDIC Corporation
InventorsSatoshi Idemura, Atsuo Kobayashi
Life of this patent
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Abstract
A pigment dispersion of the present invention includes a bisacetoacetarylide pigment (a); a styrene-acrylic acid-based copolymer (b); a basic compound (c); and a wetting agent (d), wherein the wetting agent (d) includes at least one diol compound (e), the diol compound (e) is selected from the group consisting of dipropylene glycol, 2-ethyl-1,3-hexanediol, and 1,2-hexanediol the mass ratio (e)/(a) of the diol compound (e) and the bisacetoacetarylide pigment (a) is within a range from 3/100 to 8/100.
Claims7
A pigment dispersion comprising:
- a C. I. Pigment Yellow 155 (a);
- a styrene-acrylic acid-based copolymer (b);
- a basic compound (c);
- and a wetting agent (d), wherein
- the wetting agent (d) comprises at least one diol compound (e),
- the diol compound (e) is selected from the group consisting of dipropylene glycol, 2-ethyl-1,3-hexanediol, and 1,2-hexanediol
- the mass ratio (e)/(a) between the diol compound (e) and the C. I. Pigment Yellow 155 (a) is within a range from 3/100 to 8/100, and
- the pigment dispersion is 50 to 80 mass % solid at ordinary temperature.
5 more elements
A process for producing a pigment dispersion, comprising:
- a kneading step of kneading a mixture comprising a C. I. Pigment Yellow 155 (a);
- a styrene-acrylic acid-based copolymer (b);
- a basic compound (c);
- and a wetting agent (d), wherein
- the wetting agent (d) comprises a diol compound (e),
- the diol compound (e) is one or more diol compound selected from the group consisting of dipropylene glycol, 2-ethyl-1,3-hexanediol, and 1,2-hexanediol
- the mass ratio (e)/(a) between the diol compound (e) and the C. I. Pigment Yellow 155 (a) is within a range from 3/100 to 8/100 in the kneading step, and
- the pigment dispersion is 50 to 80 mass % solid at ordinary temperature.
5 more elements
Dependencies are inferred from the claim text.