Recording material containing leuco dye

Details Recording material containing leuco dye Recording material containing leuco dye

1988-08-08

1989-12-19

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

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

Identified reactant isolating material or capsule wall...

427150, 427151, 428342, 428913, 428914, 430138, 503218, B41M 516, B41M 518, G03C 140, G03C 172

Patent

active

048883220

ABSTRACT:
A recording material comprises a layer which contains a leuco dye on a support. The leuco dye has the formula (I): ##STR1## in which each of R.sup.1 and R.sup.2 independently is an alkyl group, a cycloalky group or an aryl group, or R.sup.1 and R.sup.2 may form, together with the neighboring nitrogen atom, a heterocyclic ring; R.sup.3 is a halogen atom, an alkyl group, an aryl group, an alkoxy group or an aryloxy group; R.sup.4 is an aryl group or a heterocyclic group; R.sup.5 is a halogen atom, an acyloxy group, an acyl group, carbamoyl, sulfamoyl, an alkylsulfonylamino group, an arylsulfonylamino group, an acylamino group, amino, hydroxyl, nitro, cyano, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkysulfonyl group or an arylsulfonyl group; 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; m is 0 or 1; n is 0, 1, 2, 3, 4 or 5; and when n is 2, 3, 4 or 5, the groups represented by R.sup.5 may be different from each other.

REFERENCES:
patent: 4011352 (1977-03-01), Janssens et al.
patent: 4025089 (1977-05-01), Garner et al.

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