Abstract: The present invention provides a process for producing beta-form pigmentary copper phthalocyanine comprising a) producing crude copper phthalocyanine by charging phthalic anhydride or phthalimide, urea, a copper compound and a catalyst, at a substantially continuous and uniform rate, into a reaction chamber containing dry, granular, pre-formed copper phthalocyanine, and removing the reaction product from the reaction chamber; and b) convening the crude copper phthalocyanine produced in step a) into pigmentary form, by milling it either in the dry state or in an aqueous medium; mixing the milled material with an aqueous emulsion comprising i) a liquid C.sub.6 -C.sub.20 amine which is insoluble in water or alkali but is soluble in acid and ii) a surfactant capable of emulsifying the liquid amine; rendering the resulting mixture acidic to thereby dissolve the amine; and finally separating the desired pigmentary copper phthalocyanine from the treatment mixture.

Abstract: A pigment composition comprising (A) a pigmentary phthalocyanine, (B) a phthalocyanine derivative of formula ##STR1## where Pc is a residue of a metal-free or metal phthalocyanine, X is --CH.sub.2 -- or --SO.sub.2 --, R.sup.1 and R.sup.2 are independently hydrogen, C.sub.1 -C.sub.20 alkyl optionally substituted by hydroxyl, C.sub.1 to C.sub.4 alkoxy, amino, C.sub.1 to C.sub.10 alkylamino or di(C.sub.1 to C.sub.10 alkyl)amino, C.sub.5 to C.sub.10 cycloalkyl, or phenyl optionally substituted by C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy or halogen, or R.sup.1 and R.sub.2 together with the indicated nitrogen atom denote a five-, six- or seven-membered heterocyclic ring, or R.sup.1 and R.sup.2 together denote a group of formula ##STR2## R.sup.3 is an o-phenylene group optionally substituted by C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.

Abstract: The present invention provides a process for the production of dimethylaminomethyl copper phthalocyanine having an average of 1 to 4 dimethylaminomethyl groups per molecule which comprises reacting aminomethyl copper phthalocyanine having an average of 1 to 4 aminomethyl groups per molecule with formaldehyde and aqueous formic acid at a concentration of 2 to 60%, at atmospheric pressure, and at an elevated temperature.