Method for producing β copper phthalocyanine blue pigments and use thereof

A method for producing an aqueous suspension of β-phthalocyanine blue pigment, using an agitator ball mill, comprising:

• a) a phthalocyanine crude blue is suspended by means of a dissolver in an aqueous medium;
• b) the aqueous suspension of the phthalocyanine crude blue is ground and conditioned in an agitator ball mill to form a suspension of a β-phthalocyanine blue pigment;
• and,
• wherein a vessel for executing step a) and a storage reservoir for executing step b) can be identical and a change from step a) to step b) is limited to opening and closing of several valves including switching-on a circulating pump and a mill drive.

A method for producing an aqueous suspension of β-phthalocyanine blue pigment, using an agitator ball mill, comprising:

• a) a phthalocyanine crude blue is suspended by means of a dissolver in an aqueous medium;
• b) the aqueous suspension of the phthalocyanine crude blue is ground and conditioned in an agitator ball mill to form a suspension of a β-phthalocyanine blue pigment;
• and,
• wherein the aqueous medium further comprises:
• binding substance resin present in a concentration from about 1.0% to about 5.0% by weight a carboxylic acid present in a concentration from about 1.0% to about 5.0% by weight, a printing ink oil present in a concentration from about 0.7% to about 7.0% by weight, an aromatic compound present in a concentration from about 0.1% to about 8.0% by weight, and a polar solvent present in a concentration from about 0.1% to about 20% by weight.

A method for producing an aqueous suspension of β-phthalocyanine blue pigment, using an agitator ball mill, comprising:

• a) a phthalocyanine crude blue is suspended by means of a dissolver in an aqueous mediums, wherein the aqueous medium comprises:
• a dispersion agent including at least one selected from the group consisting of:
• alcohol-ethyl/propyl, tetramethyldecyndiol, sodium dioctylsulfosuccinate, glyceryloleate, sodium dodecyl-diphenyloxide-disulfonate, ammonium polyacrylate, diethylene-glycolstearate, penta-erythrityloleate, diisopropyl-napthaline-sodium-sulfonate, PEG-glyceryloleate and/or palmitic/stearic acid-glyceride,
• a binding agent resin including at least one selected from the group consisting of:
• phenol-modified hydrocarbon resin, alkyd resin, hydrocarbon resin, hydrated colophonium resin, phenol-modified colophonium resin, pentaervthritol-rosin ester, colophonium resin, phenol-modified rosin ester and maleic-modified rosin ester, ketone resin, aldehyde resin, melamine-formaldehyde-condensation resin and/or acrylic resin,
• a carboxylic acid including at least one selected from the group consisting of:
• stearic acid, palmitic acid, oleic acid, dodecanoic acid, linoleic acid, linolenic acid and/or myristic acid,
• beta-phase-directing aromatic compounds including at least one selected from the group consisting of dibenzofuran, 1.8-napthalimide, benzyl, diphenyl carbinol, 1-methylnaphthaline, phthalic acid anhydride, benzoic acid, benzophenone, trans-stilbene, 1,2,4,5-tetramethyl-benzene, anthracene, and dibenzyl ether,
• a printing ink oil including at least one selected from the group consisting of various mineral oils and vegetable oils,
• polar solvents including at least one selected from the group consisting of:
• cyclohexanol, dioxane, butyl glycol, amyl alcohol, dodecyl alcohol, acetone, 2-methyl-3-butene-2-ol, dimethylformamide, dimethylsulfoxide, 3-methyl-1-butanol, tetrahydrofurane, 2-propanol, 2-methyl-1-propanol and polyethylene glycol, and,
• a base including at least one selected from the group consisting of:
• potassium hydroxide, sodium hydroxide, an agueous ammonia solution, monoethanolamine and triethanolamine;
• and,
• b) the aqueous suspension of the phthalocyanine crude blue is ground and conditioned in an agitator ball mill to form a suspension of a β-phthalocyanine blue pigment.

A method for producing an aqueous suspension of β-phthalocyanine blue pigment using an agitator ball mill, comprising:

• (a) a crude phthalocyanine blue is suspended in an aqueous medium by means of a dissolver;
• (b) the aqueous suspension of the crude phthalocyanine blue thus obtained is ground and conditioned at a temperature from about 30° C. to about 95° C. in the agitator ball mill, of which from about 60% to about 95% volume is filled with grinding beads, to obtain a suspension of a β-phthalocyanine blue pigment;
• and,
• (c) a dispersing agent, a resin binder, a β-phase-directing aromatic compound, a printing ink oil, a polar solvent as a solutizer, and a base are incorporated into the aqueous suspension of the crude phthalocyanine blue.