Title (en)

N-ALKYL- OR N-ARYL-AMINOPYRAZOLONE MEROCYANINE DYE-DONOR ELEMENT USED IN THERMAL DYE TRANSFER

Publication

EP 0257577 B1 19911023 (EN)

Application

EP 87112145 A 19870821

Priority

• US 5944387 A 19870608
• US 89927386 A 19860822
• US 91545186 A 19861006

Abstract (en)

[origin: EP0257577A2] A dye-donor element for thermal dye transfer comprises a support having thereon a 3-(N-alkyl- or N-aryl-amino)-2-pyrazolin-5-one merocyanine dye dispersed in a polymeric binder, the merocyanine dye being capable of transfer by diffusion to a dye-receiving element upon the application of heat and being incapable of substantial photolysis, the merocyanine dye being substituted or unsubstituted on the bridging methine carbon atoms. In a preferred embodiment, the merocyanine dye has the formula: <CHEM> wherein: R represents a substituted or unsubstituted alkyl group of from 1 to 6 carbon atoms or a substituted or unsubstituted aryl group of from 6 to 10 carbon atoms; R<1> and R<2> each independently represents hydrogen, with the proviso that only one of R<1> and R<2> may be hydrogen at the same time; a substituted or unsubstituted alkyl group of from 1 to 6 carbon atoms or a substituted or unsubstituted aryl group of from 6 to 10 carbon atoms; or R<1> and R<2> may be combined together with the nitrogen to which they are attached to form a heterocyclic ring system; R<3> is R; n represents 0 or 1; and Z represents the atoms necessary to complete a 5- or 6-membered substituted or unsubstituted heterocyclic ring.

IPC 1-7

B41M 5/26

IPC 8 full level

B41M 5/26 (2006.01); B41M 5/385 (2006.01); B41M 5/52 (2006.01)

CPC (source: EP)

B41M 5/3854 (2013.01); B41M 5/5227 (2013.01)

Designated contracting state (EPC)

BE CH DE FR GB LI NL

DOCDB simple family (publication)

EP 0257577 A2 19880302; EP 0257577 A3 19890726; EP 0257577 B1 19911023; CA 1283535 C 19910430; DE 3774038 D1 19911128

DOCDB simple family (application)

EP 87112145 A 19870821; CA 543132 A 19870728; DE 3774038 T 19870821