Grinding process for high viscosity cellulose ethers

Details Grinding process for high viscosity cellulose ethers Grinding process for high viscosity cellulose ethers

C - Chemistry, Metallurgy

08

B

241/138

C08B 11/20 (2006.01) C08J 3/12 (2006.01) C08L 1/26 (2006.01)

Patent

CA 1315759

ABSTRACT High viscosity cellulose ether products are produced by grinding a substantially dry high molecular weight cellulose ether under conditions of mild mechanical impact, such as those encountered in a high speed air swept impact mill, and where prior to grinding the cellulose ether has a viscosity greater than about 100,000 cps at 20°C. It has been found that such cellulose ether products have several times the intrinsic viscosity of a product of substantially equivalent particle size by ball mill or hammer mill grinding. 34,545A-F

591519

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