Cationic and Nonionic Starch Graft Polymers for Filler Retention

Abstract

Graft co‐ and terpolymers were prepared by free radical polymerizations of vinyl monomers onto ω‐irradiated starch by a prototype commercial process. Products with graft contents of up to 46%, by weight, were obtained by grafting acrylamide and quaternary amine‐containing esters of methacrylic acid to starch. The graft polymers were evaluated on a pilot fourdrinier paper machine as filler retention aids and compared with several commercial flocculants. Drainage rate increased markedly with one of the starch graft terpolymers that was cationic. Since the number of starch graft polymers prepared was limited, the results reported, although excellent, are not necessarily optimal. Further studies are needed to establish the relationships of graft content and terpolymer compositions to retention and drainage.

Cationisation of Starch Granules by Graft Copolymerisation

“…A few papers present a good survey about these works [3][4][5]. In some examinations TMAEMA and MAPTAC were used too, while mainly graft yield, graft chain molecular weight, flocculation and adsorption characteristic of the products were analysed [6][7][8][9].…”

Adhesion of starch‐g‐poly(2‐acryloyloxyethyl trimethyl ammonium chloride) to cotton and polyester fibers

“…It is considered that starch graft copolymer is a representative of the modified starch sizes through chemical method . The copolymers found widespread uses in textile , paper making , and wastewater treatment . In recent years, many efforts have been devoted to the graft copolymerization of starch with acrylic acid , methyl acrylate , acrylamide , etc.…”