Pressure-sensitive or heat-sensitive recording material

Details Pressure-sensitive or heat-sensitive recording material Pressure-sensitive or heat-sensitive recording material

1983-05-13

1987-12-29

Herbert, Thomas J.

Record receiver having plural interactive leaves or a colorless

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

Heavy metal reactant

503212, 503216, 503217, 503225, 427150, 427151, B41M 516, B41M 518, B41M 522

Patent

active

047164247

ABSTRACT:
A pressure- or heat-sensitive recording material which, in its color reactant system, contains as a color developer for the color former, at least one substituted resorcinol compound of the formula ##STR1## or a corresponding zinc or aluminium salt, in which R is a carboxyl- or aroyl-free substituent which has a positive Hammett para-sigma value and which is capable of forming, together with the adjacent hydroxyl group, an intramolecular hydrogen bond in the form of a six-membered ring.

REFERENCES:
patent: 3244548 (1966-04-01), Sullivan
patent: 3244549 (1966-04-01), Farnham et al.
patent: 3244550 (1966-04-01), Farnham et al.
patent: 3560229 (1971-02-01), Farnham et al.
patent: 4379721 (1983-04-01), Qualitz et al.

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