Patent ID: 8569401
Filing Date: 2013-10-29
Classification: C08B,C08J,C08K,C08L

Abstract:
1. A process for improving the transportability of a water-moist cellulose ether composition in a conveying unit, comprising the steps: a) provision of a starting material comprising a water-moist cellulose ether or a cellulose ether mixture having a moisture content of from 25 to 75% by weight, based on the total mass of the starting material, b) optionally addition and mixing in of water and/or optionally addition and mixing in of further additives, (except for WSAP), to the starting material, provided starch, starch ether, guar, guar ether and xanthan are not added, and are not present in the water-moist cellulose ether composition, characterized by the step c) surface addition of from 0.001 to 2.0% by weight, of a WSAP or of a WSAP mixture, based on the dry mass of the cellulose ether composition to be prepared, to granular particles and/or lumps of the composition obtained in step a) or in steps a) and b), followed by mixing the water-moist cellulose ether composition for a residence time of greater than 8 minutes, provided that the WSAP or WSAP mixture is distributed inhomogeneously in the obtained water-moist cellulose ether composition, namely, in the absence of kneaders or extruders, characterized in that less than 30% of the WSAP present in the obtained water-moist cellulose ether composition is found within the granular particles and/or lumps; so that a water-moist cellulose ether composition is obtained which has a moisture content of from 45 to 85% by weight, based on the total mass of the cellulose ether composition.