Heat-sensitive recording material

Details Heat-sensitive recording material Heat-sensitive recording material

1997-02-18

1998-06-30

Chu, John S.

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

430157, 430162, 430171, 430178, G03C 154

Patent

active

057731861

ABSTRACT:
A heat-sensitive recording material comprises a substrate and a heat-sensitive recording layer provided on the substrate, and the heat-sensitive layer contains a diazo compound and a coupler compound which produces color, reacting with the diazo compound. The heat-sensitive recording material contains a diazo compound represented by the following general formula (I) or (II) ##STR1## wherein R.sup.1 to R.sup.4 each independently represents a hydrogen atom, an alkyl group, --OR.sup.5, --SR.sup.6, --NR.sup.7 R.sup.8, --COR.sup.10, a halogen atom, --SO.sub.2 R.sup.10, --CN, --NO.sub.2, or the like, in which R.sup.7 and R.sup.8 are coupled together to form an alkylene group which may contain --O--, --S--, --SO.sub.2 -- or --NR.sup.9 ; A represents --CO-- or --S0.sub.2 --; B represents --SO.sub.2 R.sup.11 or --POR.sup.12 R.sup.13, in which R.sup.11 represents an alkyl group, --NR.sup.7 R.sup.8 or the like and R.sup.12 and R.sup.13 each independently represents an alkyl group, an aryl group or the like, R.sup.21 to R.sup.24 each independently represents a hydrogen atom, an alkyl group, an aryl group, --OR.sup.25, --SR.sup.26, --NR.sup.27 R.sup.28, --COR.sup.30, or the like, and at least one of R.sup.21 to R.sup.24 represents any one of an aryloxy group, an arylthio group and --NR.sup.27 R.sup.28, in which R.sup.27 and R.sup.28 are coupled together to form an alkylene group which may contain --O--, --S--, --SO.sub.2 -- or --NR.sup.29 ; C represents --CO-- or --SO.sub.2 --; D represents a hydrogen atom, a hydroxyl group, --COR.sup.31, --CR.sup.32 NR.sup.33 R.sup.34 or the in which R.sup.31 represents an alkyl group or the like, R.sup.32 represents .dbd.O or .dbd.S, and R.sup.33 and R.sup.34 each independently represents a hydrogen atom, an alkyl group or the like.

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