1140836-A is referenced by 4 patents.
1,140,836. Phthalocyanine pigments. GEIGY (U.K.) Ltd. 22 Feb., 1967 [22 Feb., 1966], No. 7751/66. Heading C4P. The properties of metal phthalocyanine blue pigments are improved by mixing the phthalocyanine in dry pigmentary form with a polar aliphatic solvent which is at least partially water-miscible and separating the solvent from the treated pigment. Solvents mentioned are methanol, ethanol, npropanol, isopropanol, n-butanol, ethyl acetate, acetone, methylethylketone, 2-methoxyethanol, 2-ethoxyethanol, ethylene glycol and diethylene glycol. The solvent may contain dissolved water.