Patent ID: 7905952
Filing Date: 2011-03-15
Classification: C09B,C09K,G03F

Abstract:
1. 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 R  C R R each R R 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 R R with the proviso that the total number of carbon atoms in R wherein the thus isolated pigment composition comprises, by weight based on the total content of components having a phthalocyanine core,