Process for making composite colorant particles
AssigneeEastman Kodak Company
InventorsXiaoru Wang, Yongcai Wang, Edward Schofield
Life of this patent
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Abstract
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; and III) 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, and b) at least one ethylenically-unsaturated monomer; thereby forming the composite colorant particles having a colorant phase and a polymer phase.
Claims14
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 said aqueous colorant mixture an addition polymerization initiator;
- and
- III) causing said addition polymerization initiator to form a free radical while continuously introducing to said aqueous colorant mixture a monomer mixture comprising:
- a) an addition polymerization initiator, and
- b) at least one ethylenically-unsaturated monomer;
- thereby forming said composite colorant particles having a colorant phase and a polymer phase.
Dependencies are inferred from the claim text.