Patent ID: 6534636
Filing Date: 2003-03-18
Classification: C09B,G11B,Y10S

Abstract:
An azo-metal complex dye represented by the following formula (I) for a high density optical disc recording medium: whereinR1 is selected from the group consisting of carboxy, C1-8 alkoxycarbonyl (â€”CO2R6) and amide (â€”CONR8R9); R2, R3, R4 and R5 may be the same or different and are selected from the group consisting of hydrogen, C1-8 alkyl, C1-8 alkoxyl, carboxy, C1-8 alkoxycarbonyl (â€”CO2R6), C1-6 alkylaminealkylenecarboxy (â€”CO2R7NR8R9), amide (â€”CONR8R9), nitro (â€”NO2), trifluoro-methyl (â€”CF3), sulfonic acid fluoride group (â€”SO2F), sulfonic acid group (â€”SO3H) and halogen; X is selected from the group consisting of carbon and nitrogen; M is selected from the group consisting of Mg+2, Mn+2, Co+2, Ni+2, Cu+2  and Zn+2; R6 is C1-8 alkyl; R7 is C1-8 alkylene; and R8 and R9 may be the same or different and are selected from the group consisting of hydrogen and C1-6 alkyl.