| 摘要 |
PROBLEM TO BE SOLVED: To provide a water soluble thickener having temperature sensitivity which can control the temperature sensing point LCST at a high salt concentration and in a wide pH range and has a stable thickening effect, high salt-water resistance, high acid resistance, and high alkali resistance.SOLUTION: The water soluble thickener can be obtained by blending, in an aqueous medium, a water-soluble polymer containing acryloyl morpholine, N, N-dimethylacrylamide, and vinyl pyrrolidone as constitutional units and a metal salt having a metal cation which is a Lewis acid, and it has allowed the LCST to be optionally controlled. |
