EP 0159874 B1 19910724 - PREVENTION OF SPOTTING IN THERMAL IMAGING COMPOSITIONS
Title (en)
PREVENTION OF SPOTTING IN THERMAL IMAGING COMPOSITIONS
Publication
Application
Priority
US 60047484 A 19840416
Abstract (en)
[origin: EP0159874A2] Thermally imageable composition comprising (a) at least one leuco dye, (b) a nitrate salt, (c) at least one base having a conjugate acid with pKa equal to or greater than zero. The base serves to prevent spotting or backgrounding of transparency films bearing said thermally imageable composition during the manufacturing process used in preparing the films.
IPC 1-7
IPC 8 full level
B41M 5/337 (2006.01); B41M 5/30 (2006.01)
CPC (source: EP)
B41M 5/30 (2013.01)
Citation (examination)
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 190 (M-159) [1068], 29th September 1982; & JP - A - 57 98 392 (TOPPAN INSATSU K.K.) 10-12-1980
Designated contracting state (EPC)
CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0159874 A2 19851030; EP 0159874 A3 19860604; EP 0159874 B1 19910724; AU 3980085 A 19851024; AU 580034 B2 19881222; BR 8501734 A 19851210; CA 1236299 A 19880510; DE 3583524 D1 19910829; JP H0671823 B2 19940914; JP S60234885 A 19851121
DOCDB simple family (application)
EP 85302573 A 19850412; AU 3980085 A 19850313; BR 8501734 A 19850412; CA 475897 A 19850307; DE 3583524 T 19850412; JP 8004485 A 19850415