Ciba-Geigy Corporation

Ciba Specialty Chemicals Corporation

David Keirs

Robert Langley

Thomas Healy

Ian A Lambie

Kenneth Grant Dykes

Richard Ernest Mathers

Production process

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.4 alkoxy, nitro or halogen, and m has an average value of 1 to 5, and (C) at least one anionic surfactant selected from (i) a monovalent metal or ammonium salt of an organic sulfonic acid, (ii) a sulfate half-ester of an alcohol or a monovalent metal or ammonium salt thereof, (iii) a sulfosuccinic acid ester or a monovalent metal or ammonium salt thereof, (iv) a sulfosuccinamic acid or a monovalent metal or ammonium salt thereof or (v) an aminosulfonic acid or a monovalent metal or ammonium salt thereof.

Phthalocyanine pigment compositions

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Paisley, United Kingdom

David Keirs