Document Type and Number:
Japanese Patent JPS5444684
Kind Code:
B1
Abstract:
A process for the stabilization of phthalocyanine pigments which consists of incorporating a compound of the formula: ** (see formula) ** Where fc represents the remainder of a phthalocyanine, the core a can be substituted with low molecular weight alkyl groups and n represents an integer from 1 to 8 this incorporation taking place by mixing together the phthalocyanine pigment to be stabilized and of the compound of formula i, this mixture can be made according to the following modalities: A) the phthalocyanine pigment to be stabilized is mixed together and the compound of formula i, in the dry state, with or without grinding action; or B) the phthalocyanine pigment to be stabilized is ground and the compound of formula i in the dry state in the presence of a mineral salt soluble in water, the mixture is dispersed in hot water and filtered; or C) the phthalocyanine pigment to be stabilized is mixed and the compound of formula i in aqueous suspension or in an organic solvent, the water or the solvent is removed and dried; or D) dissolve the phthalocyanine pigment to be stabilized and the compound of formula i in sulfuric acid, pour the obtained solution into water, filter and dry; or E) a partially chloromethylated phthalocyanine is reacted with a 2-mercaptothiazole whose benzene nucleus can be replaced by low molecular weight alkyl groups. (Machine-translation by Google Translate, not legally binding)
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Application Number:
JP9297971A
Publication Date:
December 27, 1979
Filing Date:
November 19, 1971
Export Citation:
International Classes:
C09B47/12; C09B67/22; (IPC1-7): C09B47/04