Amphoteric starches and process for their preparation

Details Amphoteric starches and process for their preparation Amphoteric starches and process for their preparation

C - Chemistry, Metallurgy

08

B

9/43, 260/221.1

C08B 31/16 (2006.01) D21H 13/30 (2006.01) D21H 17/29 (2006.01)

Patent

CA 1284639

ABSTRACT OF THE DISCLOSURE Improved amphoteric starch derivatives containing tertiary amino or quaternary ammonium groups and anionic phosphate groups are disclosed. The derivatives which are defined by a minimum bound phosphorus content, a minimum viscosity and other criteria have use as wet-end additives and provide improved drainage properties in the manufacture of paper.

544469

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