| abstract |
(57) [Summary] [Object] To provide a water-soluble polymer which is excellent in biodegradability and also has a chelating action and a dispersing action, and a method for producing the same. Furthermore, it exhibits excellent performance in each application, Moreover, even if it is finally discharged into the environment, it is hard to accumulate, Provided are a detergent composition, a fiber treatment agent, an inorganic pigment dispersant and a water treatment agent. [Structure] Maleic acid and / or its salt 95-1 A vinyl-based polymer unit consisting of a water-soluble ethylenically unsaturated monomer in an amount of 100% by weight and a sugar unit consisting of a monosaccharide, an oligosaccharide and a derivative thereof, and the main chain terminal of the vinyl-based polymer unit. At least one of the carbon atoms of the above is bonded to a carbon atom of the methylol group of the sugar unit, and 40 to 90 mol% of all the acid groups of the vinyl polymer unit are neutralized, biodegradable. A water-soluble polymer having |