Phthalocyanines, compositions derived therefrom and processes fo

Details Phthalocyanines, compositions derived therefrom and processes fo Phthalocyanines, compositions derived therefrom and processes fo

1974-02-19

1976-06-01

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

106308N, C08K 534

Patent

active

039605876

ABSTRACT:
Compounds falling within the formula: ##EQU1## in which Pc represents the residue of a phthalocyanine, R.sub.1 represents an alkyl group of low molecular weight or a cycloalkyl group, R.sub.2 represents a hydrogen atom, an alkyl group of low molecular weight or a cycloalkyl group, R.sub.3 represents a hydrogen atom or an alkyl group of low molecular weight, R.sub.1 and R.sub.2 or R.sub.1, R.sub.2 and R.sub.3 may also form a heterocyclic residue with the nitrogen atom and m and n each represent a whole or fractional number from 1 to 4; mixture of phthalocyanine pigments comprising a phthalocyanine pigment unstable to flocculation or sedimentation and at least one compound of the above formula; process for the stabilization of a phthalocyanine pigment comprising incorporating therein at least one compound of the above formula; process for the preparation of a compound of the above formula comprising reacting a phthalocyanine-sulphonate of the formula:

REFERENCES:
patent: 3754958 (1973-08-01), Grambalvo
patent: 3764360 (1973-10-01), Langley

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