Recording material containing leuco dye

Details Recording material containing leuco dye Recording material containing leuco dye

1987-10-30

1988-10-04

Michl, Paul R.

Record receiver having plural interactive leaves or a colorless

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

Identified color-former

549224, 430138, 430281, 430541, B41M 516, C07D40704, C07D49310

Patent

active

047756560

ABSTRACT:
A recording material comprises a layer containing a leuco dye provided on a support, characterized in that the leuco dye has the formula (I): ##STR1## in which one of X and Y is a single bond and the other is sulfur atom; each of R.sub.1 and R.sup.2 independently is an alkyl group, a cycloalkyl group or an aralkyl group; each of R.sup.3 and R.sup.4 independently is hydrogen, a halogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an aralkyl group or an aryloxy group; R.sup.5 is hydrogen, a halogen atom, an alkyl group, an alkoxy group, nitro or amino; and each of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 may have one or more substituent groups.

REFERENCES:
patent: 4156682 (1979-05-01), Hotta et al.
patent: 4624910 (1986-11-01), Takeda
patent: 4629676 (1986-12-01), Hayakawa et al.
patent: 4649098 (1987-03-01), Takeda

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