EP 0086636 B1 19850911 - PRESSURE SENSITIVE RECORD SYSTEMS
Title (en)
PRESSURE SENSITIVE RECORD SYSTEMS
Publication
Application
Priority
JP 2182582 A 19820213
Abstract (en)
[origin: EP0086636A1] A pressure-sensitive record system comprises a donor composition and an acceptor composition which react under pressure to generate a coloured image or print, in which the donor composition comprises microcapsules containing a solution in a high-boiling solvent (preferably an aromatic hydrocarbon solvent) of an electron-donating colouriess dye and the acceptor composition comprises activated clay and an aryl or aralkyl ester of p-hydroxybenzoic acid. Record systems produced using this combination of specific donor and acceptor compositions have a high rate of colour development, a high stability of the coloured images formed, and stability of unprinted background portions, particularly on exposure to sunlight and atmospheric oxidizing gases, and consequently a long shelf life. The record system is preferably of the transfer type in the form of a manifold containing a CB-sheet coated with the donor composition and a CF-sheet coated with the acceptor composition and possibly one or more interposed CFB-sheets coated on opposite sides with the two compositions.
IPC 1-7
IPC 8 full level
B41M 5/155 (2006.01); B41M 5/165 (2006.01)
CPC (source: EP)
B41M 5/155 (2013.01)
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 0086636 A1 19830824; EP 0086636 B1 19850911; DE 3360745 D1 19851017; JP S58138689 A 19830817
DOCDB simple family (application)
EP 83300687 A 19830211; DE 3360745 T 19830211; JP 2182582 A 19820213