| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hydrophilic soft polymer compsn. which is excellent in mechanical strengths in spite of its being supersoft and excellent also in hydrophilicity and water absorption properties by homogeneously dispersing a supersoft polymer material in an org. polymer material. SOLUTION: This compsn. is produced by thermally melt mixing 100 pts. thermoplastic styrenic elastomer having an average mol.wt. of 150,000 or higher with 500-4,000 pts. mineral oil softener, 200-1,000 pts. cross-linked water-absorbing polymer, and 1-600 pts. hydrophilic polymer or oligomer as the surfactant at a specified temp. for a specified time. The production process comprises the step of predrying the elastomer and the water-absorbing polymer, the step of adding specified amts. of the softener and the hydrophilic polymer or oligomer in a temp.-controllable mixer, and the step of thermally melt mixing under stirring in an inert gas atmosphere. |
