Direct thermal imaging material containing a protective layer

Details Direct thermal imaging material containing a protective layer Direct thermal imaging material containing a protective layer

1995-11-29

1998-06-02

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Thermographic process

Heat applied after imaging

430200, 430203, 430523, 430617, 428913, G03C 1498

Patent

active

057597529

ABSTRACT:
A thermosensitive recording material suited for use in direct thermal imaging by means of an information-wise energized heating element, said recording material containing a thermosensitive recording layer of which the optical density is changed by heat, characterized in that said recording layer is coated with a protective transparent resin layer essentially consisting of a polycarbonate or copolycarbonate derived from one or more bisphenols, wherein at least 25 mole % of said bisphenols consists of a bis-(hydroxyphenyl)-cycloalkane corresponding to following general formula (I): ##STR1## wherein: each of R.sup.1, R.sup.2 , R.sup.3, and R.sup.4 (same or different) represents hydrogen, halogen, a C.sub.1 -C.sub.8 alkyl group, a substituted C.sub.1 -C.sub.8 alkyl group, a C.sub.5 -C.sub.6 cycloalkyl group, a substituted C.sub.5 -C.sub.6 cycloalkyl group, a C.sub.6 -C.sub.10 aryl group, a substituted C.sub.6 -C.sub.10 aryl group, a C.sub.7 -C.sub.12 aralkyl group, or a substituted C.sub.7 -C.sub.12 aralkyl group, and

REFERENCES:
patent: 3074809 (1963-01-01), Owen
patent: 3080254 (1963-03-01), Grant, Jr.
patent: 4982014 (1991-01-01), Freitag et al.
Research Disclosure 10148, 1972.
Disclosed Anonymously (R1278), Research Disclosure 10147, Sep. 1972.

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