| 摘要 |
<p>The invention aims at providing a polymeric hydrogel which is more resistant to water washing. The aim is attained by a polymeric hydrogel comprising a polymeric matrix formed by copolymerizing a nonionic monomer with a crosslinking monomer, a wetting agent, and water, characterized in that at least 50 wt% of the wetting agent is constituted of a polymer prepared by polymerizing a polyhydric alcohol monomer component containing a trihydric or higher alcohol monomer and the polymer is a water-soluble one which has an average molecular weight of 150 to 4000 and satisfies the relationship: {(number of ether groups present in the polymer + number of hydroxyl groups present in the polymer)/ number of carbon atoms present in the polymer} ≥ 1/3.</p> |
