Pressure-sensitive recording material

Details Pressure-sensitive recording material Pressure-sensitive recording material

1987-01-08

1988-09-06

Shah, Mukund J.

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

346210, 346211, 346212, 346216, 346225, B41M 518, C03C 172

Patent

active

047693053

ABSTRACT:
A pressure-sensitive recording material is described, comprising an electron-donating color former and an electron-accepting color developer wherein said color developer comprises a mixture of (a) an aromatic carboxylic acid metal salt and (b) a hindered phenol as a combined electron-accepting color developer. The aromatic carboxylic acids should desirably have a hydroxyl group in the ortho or para position to the carboxyl group and preferably is a salicylic acid derivative. The hindered phenols preferably have an alkyl substituent in at least one of the 2 and 6 positions. This pressure-sensitive recording material can provide color images having an excellent fastness to light and solvents.

REFERENCES:
patent: 3934070 (1976-01-01), Kimura et al.
patent: 3983292 (1976-09-01), Saito et al.
patent: 4226962 (1980-10-01), Stolfo
patent: 4262936 (1981-04-01), Miyamoto
patent: 4379721 (1983-04-01), Qualitz et al.
patent: 4461495 (1984-07-01), Nakasato et al.
patent: 4467339 (1984-08-01), Asami et al.
patent: 4507671 (1985-03-01), Koike et al.

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