Bleaching and dyeing; fluid treatment and chemical modification – Dye or potential dye composition – additive – treatment,... – Polymeric dye – e.g. – a chromophore pendant from an addition...
Patent
1988-01-11
1989-11-14
Clingman, A. Lionel
Bleaching and dyeing; fluid treatment and chemical modification
Dye or potential dye composition, additive, treatment,...
Polymeric dye, e.g., a chromophore pendant from an addition...
8509, 8513, 8514, 8662, 8675, 8678, 8679, 430115, C09B 6910
Patent
active
048804320
ABSTRACT:
Disclosed is a process for preparing particles colored with a dye which comprises: (a) forming, by a free radical dispersion polymerization process in a nonaqueous solution, polymeric particles having attached thereto stabilizing copolymers with at least one functional group capable of undergoing a chemical reaction with a dye, the particles having an average diameter of from about 0.1 to about 20 microns; (b) adding a dye to the polymeric particles having attached thereto stabilizing copolymers; and (c) effecting a chemical reaction between the dye and the stabilizing copolymers that results in the dye becoming covalently bound to the polymeric particles. Also disclosed is a liquid electrophotographic developer composition comprising a liquid medium, a charge control agent, and colored polymeric toner particles prepared as stated above and having an average diameter of from about 0.5 to about 5 microns.
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Egan Luke S.
Winnik Francoise M.
Winnik Mitchell A.
Byotick Judith L.
Clingman A. Lionel
Xerox Corporation
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