C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 3/02 (2006.01) C08J 3/03 (2006.01) C08L 97/02 (2006.01) D21H 17/29 (2006.01) D21H 21/16 (2006.01) D21H 21/18 (2006.01)
Patent
CA 2704379
The invention is directed to coating compositions comprising a pigment and starch dispersion of discrete crosslinked starch particles in an aqueous liquid. The dispersion may be used as coating color for paper. A preferred process of preparing said dispersion of starch particles comprises (a) obtaining a mixture of starch and an aqueous liquid; (b) processing the mixture using shear forces in the presence of a crosslinker in an extruder; and (c) injecting a hydroxylic liquid into the extruder and dispersing the mixture inside the extruder or outside the extruder or both inside and outside the extruder to obtain the dispersion.
Annen Thomas Martin Stephan
Helbling Andre Marcel
Hills Michael Robert
Stollmaier Friederike Theresia
Ecosynthetix Inc.
Mccarthy Tetrault Llp
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