| abstract |
Disclosed are colorant compounds of the formulan nwherein R, R 1 , R 2 , R 3 , and R 4 each, independently of the others, is annalkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, andnwherein R, R 1 , R 2 , R 3 , and R 4 each can be joined to a phenyl moiety tonform a ring, each R' a , R' b , and R' c , independently of the others, is anhalogen atom, an alkyl group, an alkoxy group, a nitrile group, a nitrongroup, an amide group, or a sulfonamide group, z1, z2, and z3 each,nindependently of the others, is an integer of 0, 1, 2, 3, or 4, n is anninteger representing the number of carbon atoms in each repeatnalkylene oxide unit, x is an integer representing the number of repeatnalkylene oxide units, D is an anion, and g is the charge on the anion,nwherein said colorant has no more than one -OH, -SH, or primary ornsecondary amino group per molecule. |