US 6,747,170 B2 · Thermosensitive recording material and color developer compound therefor

Abstract

A thermosensitive recording material has a support and a thermosensitive coloring layer formed thereon containing a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, with the color developer including at least one compound (A) having in a molecule thereof at least two aromatic ring moieties with specific structures, selected from the group consisting of an aromatic ring moiety having at least one carboxyl group and electron-attracting functional group, an aromatic ring moiety having at least one carboxyl group and electron-donating functional group, and an aromatic ring moiety having at least one carboxyl group, free of the electron-attracting and electron-donating functional groups. An aromatic carboxylic acid compound serving as the above-mentioned compound (A) and the producing method thereof are also disclosed.

Claims1

Dependent claims

An aromatic carboxylic acid compound of formula (I):

wherein R1 and R2 optionally are the same or different and are each independently a hydrogen atom, nitro group, hydroxyl group, an alkoxyl group, sulfonyloxy group, an alkyl group, an aralkyl group, an aryl group, an alkyloxycarbonyl group, an aralkyloxycarbonyl group or an aryloxycarbonyl group;
and X is —NHYHN— group or —OZO— group.
in which Y is an alkylene group having 2 to 12 carbon atoms, a xylylene group,
Z is a xylylene group,
provided that when R1 and R2 are each hydrogen atom, X is not —NHYHN— group in which Y represents an alkylene having 2 to 12 carbon atoms, a xylylene group,
and further provided that when R1 and R2 are nitro groups, X is not —OZO— in which Z is a xylylene group.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/154,587Filed 23 May 2002 · division

Priority

JP 9-23338114 Aug 1997

Published

US 2004/0071187 A115 Apr 2004

Granted

8 Jun 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C07C 69/92
Of monocyclic hydroxy carboxylic acids, the hydroxy groups and the carboxyl groups of which are bound to carbon atoms of a six-membered aromatic…
B41M 5/3335
Non-macromolecular compounds: compounds containing phenolic or carboxylic acid groups or metal salts thereof
B41M 5/44
Intermediate, backcoat, or covering layers: characterised by the macromolecular compounds
C07C 69/017
Esters of carboxylic acids; Esters of carbonic or haloformic acids: esters of hydroxy compounds having the esterified hydroxy group bound to a…

Family

Application09/134,689Parent of this division · filed 14 Aug 1998

Application09/689,523Parent of this division · filed 12 Oct 2000

US 2004/0071187 A1Pre-grant publication · published 15 Apr 2004

US 6,180,560 B2Parent of this division

US 6,747,170 B2This patent

From the US filing history. Foreign family members aren’t listed.

Thermosensitive recording material and color developer compound therefor

Life of this patent

Thermosensitive recording material and color developer compound therefor

Life of this patent

Abstract

Claims1