Optical recording material and optical recording medium employin

Details Optical recording material and optical recording medium employin Optical recording material and optical recording medium employin

1993-04-14

1995-08-22

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430495, 430 19, 430945, 430962, 252586, 548454, 549 49, G11B 724

Patent

active

054439400

ABSTRACT:
Disclosed herein is an optical recording material containing a photochromic compound which is expressed in the following general formula (I): ##STR1## where A represents an oxygen atom or a substituted or unsubstituted nitrogen atom, R.sub.1 represents an alkoxy group, R.sub.2 to R.sub.5 represent substituents such as a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted alkyl group and the like respectively, and B represents a substituted or unsubstituted thiophene ring, benzothiophene ring, pyrrole ring or indole ring.

REFERENCES:
patent: 3715212 (1973-02-01), Ross
patent: 3918972 (1975-11-01), Evens et al.
patent: 4780393 (1988-10-01), Frommeld
patent: 4837063 (1989-06-01), Irie
patent: 4960679 (1990-10-01), Nakagiri et al.
patent: 5183726 (1993-02-01), Taniguchi

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