Patent ID: 8198433

Claim:
An acylated phthalocyanine of the formula: wherein, R 1 and R 2 are each selected from the group consisting of hydrogen, alkyl, alkoxy and acyl radicals of the formulae —COR and —CRHOH, whereby 1-4 of the 8 R 1 and R 2 radicals are selected from the group consisting of —COR and —CRHOH, and if R 1 or R 2 on a benzene ring is selected from —COR or —CRHOH, then the other respective R 1 or R 2 radical on the benzene ring is hydrogen, R is CH 3 (CH 2 ) n — where n is 0-15, M is at least one of Mg, Zn, Cd, Cu, Ni, Co, Fe, Pt, Pd or Sn, alkyl is C n H 2n+1 where n is 7-14, and alkoxy is OC n H 2n+1 where n is 6-15.