Optical recording medium

Details Optical recording medium Optical recording medium

1986-01-22

1988-06-28

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

Composition or product

430337, 430962, G03C 1733

Patent

active

047538678

ABSTRACT:
An optical recording medium including a substrate and a photosensitive layer thereon, the photosensitive layer containing as its major ingredients, the combination of a polymeric binder resin and an indolinospirobenzothiopyran compound represented by the general formula (I): ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are each a hydrogen atom, a halogen atom, an alkyl group containing from 1 to 5 carbon atoms, an alkoxy group containing from 1 to 5 carbon atoms, an alkoxymethyl group containing from 1 to 5 carbon atoms in the alkoxy group, a hydroxymethyl group or an alkylaminomethyl group containing 2 to 6 carbon atoms in the alkyl group. The optical recording medium has a colored image which is very stable against heat and visible light.

REFERENCES:
patent: 4565779 (1986-01-01), Arakawa et al.
Becker, et al.: "Photochromism: Spectroscopy and Photochemistry of Pyran and Thiopyran Derivatives", Photochromism, vol. 72, No. 3, Mar. 1968, pp. 997-1001.

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