Patent ID: 7378221

Claim:
An optical recording medium comprising a transparent substrate, a recording layer on this substrate, a reflection layer on the recording layer and, if desired, a protective layer, wherein the recording layer comprises a mixture of metallocenyl phthalocyanines, obtained by reacting a mixture A comprising (a) from 1 to 99% by weight of a phthalocyanine of the formula I where M 1 is a divalent metal, an oxo-metal group, a halo-metal group or a hydroxy-metal group or two hydrogen atoms, where one or two ligands may be bound to the divalent metal atom, the oxo-metal group, the halo-metal group or the hydroxy-metal group, X is halogen, Y 1 is —OR 1 , —OOC—R 2 , —NHR 1 , —N(R 1 )R 2 , —SR 1 , Y 2 is —CHO, —CH(OR 3 )OR 4 , —CH═N—OH, —CH═N—OR 3 , —CH═N—NHR 5 , —CH═N—N(R 3 )R 5 , —CH 2 OH, —(CH 2 ) 2-20 OH, —CH 2 OR 3 , —CH 2 OOC—R 3 , —CO—R 3 , —COOH or —COOR 3 , R 1 to R 5 are each independently of one another, unsubstituted or halogen-, hydroxy-, C 1 -C 20 alkoxy-, C 1 -C 20 alkylamino- or C 2 -C 20 dialkylamino-substituted C 1 -C 20 alkyl, which may be interrupted by —O —,—S— or —NR 11 —, where R 11 is C 1 -C 6 alkyl, and R 1 and R 2 may also be C 5 -C 20 cycloalkyl, C 2 -C 20 alkenyl, C 5 -C 12 cycloalkenyl, C 2 -C 20 alkynyl, C 6 -C 18 aryl or C 7 -C 18 aralkyl, x is a rational number from 0 to 8, y 1 is a rational number from 0 to 6, y 2 is a rational number from 0 to 4, where (x+y 1 +y 2 )≦16, and R 15 is a hydroxyl-containing radical, a carboxyl-containing radical or a radical containing an acid chloride group, and (b) from 99 to 1% by weight of a phthalocyanine of the formula II where M 1 , X, Y 1 , Y 1 , R 15 , x, y 1 and y 2 are as defined above with a metallocene derivative in the presence of an acid catalyst wherein said mixture of metallocenyl phthalocyanines comprises from 1% to 50% by weight of metallocenyl phthalocyanine compounds selected from the group consisting of phthalocyanine compounds comprising two phthalocyanine units linked via a single bond or a bridging atom or molecule, phthalocyanine compounds comprising three phthalocyanine units linked in each case via a single bond and/or a bridging atom or molecule and phthalocyanine compounds comprising four phthalocyanine units linked in each case via a single bond and/or a bridging atom or molecule.