Urea (thiourea) derivative and thermal recording sheet using the

Details Urea (thiourea) derivative and thermal recording sheet using the Urea (thiourea) derivative and thermal recording sheet using the

1995-08-29

1997-08-26

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

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

Having nonchromogenic liquid spread-control or...

503208, 503216, 503225, B41M 530

Patent

active

056611005

ABSTRACT:
A thermal recording sheet wherein a compound of Formula (I) or (II) is contained in a thermal color developing layer including a basic colorless dye and an organic color developer as main ingredients: ##STR1## (wherein A denotes hydrogen atom, an alkyl group of C.sub.1 to C.sub.4, an alkoxy group of C.sub.1 to C.sub.4, hydroxy group, or nitro group. R.sub.1, R.sub.2, and R.sub.3 are hydrogen atom, an alkyl group of C.sub.1 to C.sub.4, an alkoxy group of C.sub.1 to C.sub.4, hydroxy group, or nitro group. R.sub.1 and R.sub.2 may combine with each other to form an aromatic ring. Y is sulfur or oxygen atom.), ##STR2## (wherein B denotes hydrogen atom, an alkyl group of C.sub.1 to C.sub.4, an alkoxy group of C.sub.1 to C.sub.4, hydroxy group, or nitro group. R.sub.1, R.sub.2, and R.sub.3 are hydrogen atom, an alkyl group of C.sub.1 to C.sub.4, an alkoxy group of C.sub.1 to C.sub.4, hydroxy group, or nitro group. R.sub.1 and R.sub.2 may combine with each other to form an aromatic ring. Y is sulfur or oxygen atom.).
The thermal recording sheet has a high sensitivity and high image stability.

REFERENCES:
patent: 5215570 (1993-06-01), Burckhardt et la.
patent: 5292711 (1994-03-01), Nishimura et al.
Translation of the claim of Japanese Patent Publication No. 43-4160 (Feb. 15, 1968).
Database WPI Section Ch, Week 8713, Derwent Publ., Ltd., Abstract of JP-A-62-039277 (Feb. 20, 1987).
Patent Abstracts of Japan, vol. 8, No. 236 (C-249) (Oct. 30, 1984), Abstract of JP-A-59-116262 (Jul. 5, 1984).
Patent Abstracts of Japan, vol. 11, No. 228 (M-610) (Jul. 24, 1987), Abstract of JP-A-62-42883 (Feb. 24, 1987).
Ivanov, et al. "Production Of 1-Phenyl And 1-Alyl-3-Sulfanylamidothioureas", Comptes Rendus De L'Academie Bulgare Des Sciences, vol. 20, No. 7, 697-8 (1967).
Patent Abstracts of Japan, vol. 8, No. 22 (C-246) (Oct. 9, 1984), Abstract of JP-A-59-106456 (Jun. 20, 1984).

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