Cationic starch graft copolymers and novel process for the preparation of cationic starch graft copolymers
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United States of America Patent
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Aug 31, 2010
Grant Date -
Sep 2, 2004
app pub date -
Feb 26, 2004
filing date -
Feb 28, 2003
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Abstract
Cationic starch graft copolymer composed of the monomers a) to d) a) 20-80% by weight of acrylamide, methacrylamide or mixtures thereof, b) 3-20% by weight of at least one basic or cationic vinyl monomer, c) 0.005-1.5% by weight of at least one bifunctional or higher-functional crosslinking agent, d) 0-10% by weight of at least one nonionic or anionic vinyl monomer which differs from the monomers mentioned under a) to c) and a grafting base e) e) 15-70% by weight of at least one starch or one starch derivative, the sum of a) to e) being 100% by weight.
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