ORGANIC PIGMENTS COATED WITH METAL OXIDES FIXED BY ETHYL CELLULOSE

摘要

Compositions containing an organic pigment coated with metal oxides, wherein the pigment particles are provided with a tenacious, dense, highly crosslinked coating of silica and/or alumina which is fixed by polycondensation of a silicate and/or aluminate with the free hydroxyl groups of a layer of ethyl cellulose that densely coats the surface of the pigment particles. Pigment compositions of this kind are distinguished in particular by excellent rheological properties in varnish and printing ink systems, by high gloss of the finishes obtained therewith, and by substantial non-deformation of the plastic mouldings pigmented therewith.