| abstract |
A compound of formula (1) and salts thereof, wherein: M is a metal or hydrogen; Pc is phthalocyanine nucleus; R?1, R2, W1 and W2¿ are each independently H or optionally substituted alkyl, aryl or aralkyl; R3 is an aminoalkyl group; L is a divalent organic linking group; x, y and t are each independently 0.5 to 2.5; and (x + y + t) is from 3 to 4. A process for making the compounds of formula (1). The compounds of formula (1) are useful as colorants for inks which are used in for example ink jet printing of substrates such as paper, plastics, textile materials, metal or glass. |