Method for preparing ink concentrates

Details Method for preparing ink concentrates Method for preparing ink concentrates

C - Chemistry, Metallurgy

09

D

C09D 11/00 (2006.01) C09D 11/02 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2189315

Methods for preparing an ink concentrate are disclosed. To prepare the ink concentrate, a varnish that includes at least one dispersing polymer is added to the pigment particles, such as an aqueous slurry or an organic- solvent-treated aqueous slurry of the pigment particles. The blend of varnish and pigment particles then is heated to a temperature effective to melt the dispersing polymer. Upon cooling, the dispersing polymer solidifies at the surface of the pigment particles to thereby physically attach and bond to and preferably encapsulate the pigment particles and form an ink concentrate. The ink concentrate thus formed will have improved color properties as compared to conventional ink concentrates.

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