| 摘要 |
PURPOSE:To obtain the titled polymer freed from surface dissolution or sliminess, by holding an aqueous solution of a water-soluble vinyl monomer in the form a thin film on a solid support, coating the surface of the thin film with a specified compound when the solution ceases to flow freely, and continuing its polymerization. CONSTITUTION:An aqueous solution containing a polymerization initiator and a water-soluble vinyl monomer (e.g., acrylamide) at a concentration of 20-85wt% is held in the form of a film for thickness of 3-30mm. on a solid support and polymerized in an inert gas atmosphere until the aqueous monomer solution ceases to flow freely, while the heat of polymerization is controlled by supplying warm or cool water to the bottom of the support. The surface of the polymer gel is coated by spraying it with an aqueous dispersion of a compound obtained by an addition reaction between an alcohol and a difficultly water-soluble or water-insoluble alkylene oxide (e.g., lauryl alcohol/propylene oxide adduct) at a concentration of 0.01-5wt%, and then the gel is completely polymerized.
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