Sulfonamido or amido substituted phthalocyanines for optical rec

Details Sulfonamido or amido substituted phthalocyanines for optical rec Sulfonamido or amido substituted phthalocyanines for optical rec

1991-06-18

1993-09-28

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428457, 428913, 346 76L, 3461351, 430945, B32B 300

Patent

active

052485382

ABSTRACT:
The present invention is directed to the use of sulfonamido or amido substituted phthalocyanine dyes in optical recording. The dyes are particularly useful in making recordable compact disks. The dyes have acceptable performance yet are easy to make.

REFERENCES:
patent: 4873131 (1989-10-01), Kashima et al.

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