| abstract |
The present invention relates to phthalocyanines of formula (I):n n n (I)n n n Wheren n n Me is 2 hydrogen, 2 lithium, magnesium, zinc, copper, nickel, VO, TiO, AlCl, AlOH, AlOCOCH 3 , AlOCOCF 3 , SiCl 2 or Si (OH) 2 ,n n n Four or more of the radicals R 1 to R 16 are each, independently of one another, bonded to the phthalocyanine structure by a ring nitrogen atom and further containing one or two nitrogen atoms or further oxygen or sulfur atoms; Is a raw saturated nitrogen-containing heterocyclic radical,n n n The remaining radicals of R 1 to R 16 are each hydrogen, halogen, hydroxysulfonyl or C 1 -C 4 dialkylsulfamoyl,n n n However, tetrakispiperidinyl phthalocyanine is excluded.n n n The present invention also relates to a method of using phthalocyanine substituted with heterocyclic radicals in marking liquids such as mineral oils containing this kind of phthalocyanine. |