Patent ID: 9133422
Filing Date: 2015-09-15
Classification: C08J,C08L,C11D

Abstract:
1. A water-soluble copolymer aqueous solution, comprising a water-soluble copolymer and hydrogen peroxide as essential components, wherein: the water-soluble copolymer at least compromises, as its structure, maleic acid, maleate, maleic anhydride or mixtures thereof (a) at 30 to 70 mol %, a acrylic acid, acrylate, methacrylic acid methacrylate or mixtures thereof (b) at 30 to 70 mol %, and a structural unit originating from 3-allyloxy-2-hydroxy-1-propanesulfonic acid (c) at 2 to 16 mol %, a structural unit originating from another monomer (d) at 0 to 5 mol % and the total mol % of (a) to (d) is 100 mol %; the water-soluble copolymer has a weight average molecular weight of 1,000 to 50,000; the water-soluble copolymer aqueous solution has a weight ratio of the hydrogen peroxide of 10 ppm to 50,000 ppm with respect to a solid content of the water-soluble copolymer aqueous solution; and the water-soluble copolymer aqueous solution has a weight ratio of water of 33% to 99%.