| abstract |
Sulfonated graft copolymers are obtained by radical graft copolymerization of one or more synthetic monomers in the presence of hydroxyl-containing naturally derived materials. The graft copolymer includes 0.1 to 100% by weight based on the total synthetic monomers weight, of at least one monoethylenically unsaturated monomer with a sulfonic acid group, monoethylenically unsaturated sulfuric acid ester or a salt thereof, wherein the monomer and hydroxyl-containing naturally derived materials are present. in a weight ratio of 5:95 to 95: 5. |