Patent ID: 9365723
Filing Date: 2016-06-14
CPC Classification: C01P,C09C,D21H

Claim Text:
1. A process for preparing self-binding pigment particles comprising the following steps: a) providing an aqueous mineral pigment material suspension, wherein the mineral pigment comprises calcium carbonate; b) providing at least one polymeric binder, wherein the binder comprises at least one carboxymethylcellulose having a degree of carboxylation in the range of 0.4 to 2.0 and having an intrinsic viscosity in the range of 3 to 300 ml/g; c) mixing the binder of step b) with the aqueous mineral pigment material suspension of step a) so that binder is present in the suspension in an amount from 0.1 to 10.0 wt.-% and the resulting suspension has a solids content of from 45 to 80 wt.-%, based on the total weight of the suspension; and d) grinding the resulting suspension of step c) to obtain a suspension of self-binding pigment particles.