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1. (WO2017037282) COMPOUND FOR USE IN COLOUR CHANGE COMPOSITIONS

Pub. No.:    WO/2017/037282    International Application No.:    PCT/EP2016/070834
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Sep 06 01:59:59 CEST 2016
IPC: B41M 5/30
C09B 67/02
C09D 11/50
Applicants: THERMOGRAPHIC MEASUREMENTS LTD
Inventors: SHIVKUMAR, Bagavant
MARREC, Philippe
Title: COMPOUND FOR USE IN COLOUR CHANGE COMPOSITIONS
Abstract:
Novel reaction media for electron donating and electron accepting components in colour- change compositions are described. The compound is of formula (I): wherein R1, and R2 are selected from a linear or branched alkyl group, alkenyl group, alkoxy group, aryl group and an alkylene aryl group having from 6 to 22 carbon atoms; X1 and X2 are selected from -OC(O)-, -CO2- and O; R3, R4 and R5 are selected from hydrogen and an linear or branched alkyl group, cycloalkyl group, alkenyl group, alkoxy group, aryl and alkylene aryl group; R6 is selected from hydrogen, R3, -Χ1R1 and aryl and halogen; Y1 Y2 Y3 and Y4 are selected from hydrogen, R3, -OR3 and halogen; a is 0 to 4; b is 0 or 1; x and y are independently is 0 or 1 provided that where x and y are 0, a is 0 and b is 1 and R6 is -C02R1; and wherein when a is 0 and b is 1 and R5 or R6 is phenyl, R6 and R5 respectively are not hydrogen or C1-7 alkyl. The compounds are useful in ink compositions, writing implements containing the compound and medical and industrial applications in which temperature sensitive colour change may be required.