Phthalide compound and recording material using the compound

Details Phthalide compound and recording material using the compound Phthalide compound and recording material using the compound

1992-04-24

1994-02-15

Ivy, C. Warren

Record receiver having plural interactive leaves or a colorless

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

Identified color-former

549304, 546187, 546196, 548518, 548525, B41M 5145, B41M 530, C07D30779

Patent

active

052867021

ABSTRACT:
The present invention provides a novel phthalide compound represented by the following formula, which rapidly forms blue-blue black color with a developer when it is used as a recording material and, since a color image formed therewith has an intense absorption at 700.about.50 nm, it is usable for optical character reader; ##STR1## where R.sup.1 and R.sup.2 represent, independently, alkyl group having 6 or less carbon atoms; cycloalkyl group having 5 or 6 carbon atoms; aryl group; or heterocyclic ring connecting R.sup.1, R.sup.2 and N, R.sup.3 and R.sup.4 represent, independently, alkyl group having 6 or less carbon atoms; cycloalkyl group having 5 or 6 carbon atoms; aryl group; a heterocyclic ring connecting R.sup.3, R.sup.4 and N, X.sup.1 .about.X.sup.3 represent, independently, hydrogen atom, alkyl group having 6 or less carbon atoms, alkoxy group having 6 or less carbon atom or halogen atom, X.sup.4 represents hydrogen atom, alkyl group having 6 or less carbon atoms, alkoxy group having 6 or less carbon atom, halogen atom or ##STR2##

REFERENCES:
patent: 4808567 (1989-02-01), Kawai et al.
patent: 4814320 (1989-03-01), Kawai et al.
patent: 4835291 (1989-05-01), Kawai et al.
Japanese Patent Publication No. 58-5940 Feb. 1983.
Japanese Application Laid-Open (Kokai) 59-199757 Nov. 1984.
Japanese Application Laid-Open (Kokai) 62-243653 Oct. 1987.
Japanese Application Laid-Open (Kokai) 2-138368 (May 1990).

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