Polymer particles containing dye

Details Polymer particles containing dye Polymer particles containing dye

2005-01-18

2005-01-18

Wu, David W. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S560000, C524S561000, C524S563000

Reexamination Certificate

active

06844377

ABSTRACT:
Dye-containing polymer particles of at least one dye in a matrix of an essentially water-insoluble polymer and having an average particle size within the range from 5 nm to 5 μm are prepared by a process which comprises precipitating the dye-containing polymer particles from a solution of the polymer and of the dye in a water-miscible organic solvent by addition of an aqueous phase thereto.

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