Process for alpha-phase metal phthalocyanine pigments
作者： Herman Gerson , Abdul Sattar
DOI:
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摘要: This invention relates to a process for preparing alpha-phase metal phthalocyanine pigments from crude comprising (a) acid pasting or swelling pigment;(b) dry milling the acid-pasted acid-swelled pigment in presence of 5 50 parts by weight stabilizer per 100 until average particle size is reduced less than about 0.5 µm;(c) finishing milled thoroughly mixing said with solvent mixture 3 6 weight, relative pigment, water and 0.4 1.0 an organic solvent, optionally 0 45 proviso that total amount used steps (b) (c) ranges pigment; (d) isolating pigment.
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