cationic starch for papermaking

Description

 Cationic starch is produced by treating the slurry  of partially swollen granules of starch with a reactive compound. This reagent contains quaternary nitrogen, yielding a positive charge that is independent of PH. The reagent usually attaches to the starch at the C6 position, the most accessible of the –OH groups. the typical level of derivatizationis one to two charged groups per hundred glucose units. Because the reaction is usually carried out in slurry, it is expected that the distribution of charged groups will be highly non- uniform.