Process for preparing phthalocyanine compounds

摘要

A process for preparing a mixture of copper phthalocyanine dyes of Formula (1): CuPc(SO₃M)_x(SO₂NH₂)_y, CuPc is copper phthalocyanine; M is a cation; x and y each independently have a value of from 0.5 to 3.5; and (x+y)=2 to 5; which process comprises: (vii) chlorosulphonating a copper phthalocyanine compound using a chlorosulphonating agent; and (viii) condensing the product of step (i) with ammonia to give a mixture of copper phthalocyanine dyes of Formula (1); (ix) optionally exchanging the cation M in the mixture of copper phthalocyanine dyes of Formula (1) resulting from step (ii) for an alternative cation M; wherein the chlorosulphonating agent comprises a mixture of chlorosulphonic acid and a chlorinating agent selected from phosphorous oxychloride and phosphorous trichloride. Also the dyes obtainable from this process; compositions and inks comprising these dyes; materials printed with these dyes, compositions or inks; ink-jet printer cartridges containing inks made from the dyes; and ink-jet printers comprising these cartridges.