| 摘要 |
A process for preparing a coated water-absorbing composition comprises coating a super-absorbent polymer with a coating medium which contains water and at least one polyhydric alcohol having hydroxy substituents on non-adjacent carbon atoms, wherein the medium is substantially free of organic solvents. The at least one polyhydric alcohol may be 2-methyl-1,3-propanediol, 1,3-propanediol, 1,4-butanediol, or a low molecular weight polyethylene glycol. The super-absorbent polymer may be a part-neutralised water-insoluble hydrogel-forming resin derived from cross-linked polyacrylic acid. Alternatively, the super-absorbent polymer may be selected from a hydrolysate of a starch-acrylonitrile graft polymer, a neutralisation product of a starch-acrylic acid graft polymer, a saponification product of a vinyl acetate-acrylic ester copolymer, a hydrolysate of an acrylonitrile copolymer, and a hydrolysate of an acrylamide copolymer. The coated water-absorbing composition may be used in personal hygiene products. |
