Patent ID: 8206502
Filing Date: 2012-06-26
Classification: C09B,G03G

Abstract:
1. A method for preparing a phthalocyanine composition comprising the steps of: synthesizing a crystalline product comprising a mixture of phthalocyanines including: a fifth phthalocyanine having the general formula B wherein M represents a pair of hydrogen atoms or a covalent or coordinate bonded moiety including an atom selected from the group consisting of Li, Na, K, Be, Mg, Ca, Ba, Sc, Y, La, Ac, Ti, Zr, Hf, V, Nb, Cr, Mo, W, Mn, Tc, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Hg, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, and Sb; A and B are different and are selected from the group including hydrogen, halogen, alkyl, and alkoxy; A and B may represent more than one substituent on each isoindoline moiety of the PcM structure; and the mole fractions of starting materials are adjusted so that the crystalline mixture contains a majority of A the synthesis is at a temperature of less than 150° C., and milling said mixture to form a pigment.