Multi-color heat sensitive recording material

Details Multi-color heat sensitive recording material Multi-color heat sensitive recording material

1988-09-23

1990-03-06

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Plural colors or plural diverse systems

427151, 427152, 428913, 503205, 503226, B41M 518

Patent

active

049066048

ABSTRACT:
In a multi-color heat sensitive recording material comprising a substrate and two or more heat sensitive color-forming layers thereon capable of forming different colors from each other, at least one of the heat sensitive color-forming layers containing a leuco dye and an acidic substance, the recording material characterized in that at least one piperidine derivative represented by the formula [I] ##STR1## wherein R.sub.1 is C.sub.1.about.30 aliphatic group residue which may have C.sub.2.about.20 alkoxycarbonyl group, or C.sub.1.about.30 aliphatic group residue which has ether linkage and oxycarbonyl group; R.sub.2, R.sub.3, R.sub.4, R.sub.5 and X are each methyl group or hydrogen atom; and l is an integer of 1 to 6, is incorporated at the position where a decolorizing function can be effected against the color-forming system comprising a leuco dye and an acidic substance.

REFERENCES:
patent: 3916068 (1975-10-01), Kohmura et al.
patent: 4599630 (1986-07-01), Ohtaki et al.
patent: 4663641 (1987-05-01), Iiyama et al.
patent: 4791095 (1988-12-01), Ikeda et al.

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