Oxidation method for preph. of polyuron, and its use as strengthening agent in paper making

Application Number  00128607 Application Date  2000.08.16
Publication Number  1298885 Publication Date  2001.06.13
Priority Information   1999/8/17 US 09/375931; 2000/8/10 US 09/636069  
Applicant(s) Name  National Starch and Chemical Investment Holding Corp.  
Inventor(s) Name  A.L. Chimichioglu;J.S. Tomeds  
Patent Agency Code  72001 Patent Agent  wang jingchao
AbstractPolysaccharide aldehydes are prepared using selective oxidation involving the use of nitroxyl radical mediated aqueous oxidation with a limited amount of oxidant and defined reaction conditions. These polysaccharide aldehyde derivatives having maximum effective aldehyde and minimal carboxylic acid levels making them especially useful as wet, temporary wet and dry strength additives for paper.