| abstract |
Phthalocyanine compounds of Formula (1) have utility as colorants in inks for ink-jet printing, where Formula (1) represents: in which: M represents a metal or H; Pc represents a phthalocyanine nucleus; and R1 represents H or -(CH2)nR3; R2 represents(CH2)nR3; or R1 and R2 together with the nitrogen atom to which they are attached represent a 5 or 6-membered ring; where: n is independently an integer from 1 to 30; and R3 is independently a group selected from hydroxy, sulpho, cyano, -SR4, -CO2R5, -PO3H2 and -NR6R7; where: R4, R5, R6 and R7 independently represent H, C1-30alkyl optionally substituted by one or more groups selected from hydroxy, mercapto, sulpho, carboxy, cyano and -PO3H2; v is the valence of Pc divided by the valence of M; x is from 1.2 to 3.8; y is from 0.1 to 2.7; z is from 0.1 to 2.7; and x, y and z satisfy 2</=x+y+z</=4. |