| 摘要 |
A process for making composite colorant particles comprising, in order:I) suspending in an aqueous medium, under agitation, finely divided colorant particles to form an aqueous colorant mixture;II) adding to the aqueous colorant mixture an addition polymerization initiator; andIII) causing the addition polymerization initiator to form a free radical while continuously introducing continuously to the aqueous colorant mixture a monomer mixture comprising:a) an addition polymerization initiator, andb) at least one ethylenically-unsaturated monomer;thereby forming the composite colorant particles having a colorant phase and a polymer phase.
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