Patent ID: 7905952

Claim:
A process for the preparation of a pigment composition, comprising the steps of: wet-milling a mixture of α copper phthalocyanine and ε copper phthalocyanine, wherein the ratio of α copper phthalocyanine to ε copper phthalocyanine at the beginning of wet-milling is from 1:99 to 99:1, together with an aminomethyl-substituted phthalocyanine of formula (I), or a mixture thereof, and a milling aid in an organic liquid; wherein M 1 is 2 H, Al(Cl), Al(OH), Bi(OH), Ca, Cd, Ce(Cl), Cr(OH), Co, Cu, Mn, Fe, Fe(Cl), Fe(OH), In(Cl), Mg, Mn(O), Ni, Os, Pb, Pd, Pt, Re, Rh, Rh(O), Ru, Si(Cl) 2 , Si(OC 1 -C 5 alkyl) 2 , Si(OH) 2 , Sn, Sr, Ti(O), V(O), Zn, Zr(O) or Zr(OH) 2 ; R 1 is R 2 is C 1 -C 20 alkyl, C 2 -C 20 alkenyl, [C 2 -C 6 alkylen-O—] 1-3 H, [C 2 -C 6 alkylen-O—] 1-3 C 1 -C 8 alkyl, [C 2 -C 6 alkylen-NH—] 1-3 C 1 -C 8 alkyl or [C 2 -C 6 alkylen-N(C 1 -C 4 alkyl)-] 1-3 C 1 -C 8 alkyl; R 3 is H, C 1 -C 20 alkyl, C 2 -C 20 alkenyl, [C 2 -C 6 alkylen-O—] 1-3 H, [C 2 -C 6 alkylen-O—] 1-3 C 1 -C 8 alkyl or [C 2 -C 6 alkylen-N(C 1 -C 4 alkyl)-] 1-3 C 1 -C 8 alkyl; R 4 and R 5 are independently from one another H or C 1 -C 6 alkyl; each R 6 is independently from all others H, C 1 -C 8 alkyl, Cl or NO 2 ; and R 7 is H, COOH, CONH 2 , CONHC 1 -C 8 alkyl or CON(C 1 -C 8 alkyl) 2 ; adding an ammonium sulfonato phthalocyanine of formula (II), or a mixture thereof, before the milling aid and the organic liquid are separated from the wet-milled mixture; wherein M 2 is 2 H, Al(Cl), Al(OH), Bi(OH), Ca, Cd, Ce(Cl), Cr(OH), Co, Cu, Mn, Fe, Fe(Cl), Fe(OH), In(Cl), Mg, Mn(O), Ni, Os, Pb, Pd, Pt, Re, Rh, Rh(O), Ru, Si(Cl) 2 , Si(OC 1 -C 5 alkyl) 2 , Si(OH) 2 , Sn, Sr, Ti(O), V(O), Zn, Zr(O) or Zr(OH) 2 ; R 8 and R 9 are each independently of one another H or C 1 -C 4 alkyl; R 10 is H, phenyl, benzyl, 2-phenylethyl, naphthyl, C 1 -C 20 alkyl, C 8 -C 20 alkenyl, [C 2 -C 6 alkylen-O—] 1-6 H, [C 2 -C 6 alkylen-O—] 1-6 C 1 -C 8 alkyl, [C 2 -C 6 alkylen-NH—] 1-6 C 1 -C 8 alkyl or [C 2 -C 6 alkylen-N(C 1 -C 4 alkyl)-] 1-6 —C 1 -C 6 alkyl; and R 11 is C 8 -C 20 alkyl, C 8 -C 20 alkenyl, [C 2 -C 6 alkylen-O—] 3-6 H, [C 2 -C 6 alkylen-O—] 3-6 C 1 -C 8 alkyl, [C 2 -C 6 alkylen-NH—] 3-6 C 1 -C 8 alkyl or [C 2 -C 6 alkylen-N(C 1 -C 4 alkyl)-] 3-6 C 1 -C 8 alkyl; with the proviso that the total number of carbon atoms in R 8 , R 9 , R 10 and R 11 is from 8 to 30; separating the milling aid and the organic liquid from the wet-milled mixture after addition of the ammonium salt of formula (II); and isolating the pigment composition; wherein the thus isolated pigment composition comprises, by weight based on the total content of components having a phthalocyanine core, from 70 to 93% of ε copper phthalocyanine; from 5 to 18% of the aminomethyl-substituted phthalocyanine of formula (I) or mixture thereof; from 2 to 15% of the ammonium sulfonato phthalocyanine of formula (II) or mixture thereof; and from 0 to 2% of other phthalocyanine compounds.