| abstract |
(57) [Abstract] [PROBLEMS] To provide a hydrogel having antibacterial properties, and a soft contact lens having the antibacterial properties. [Structure] A hydrocarbon group-containing (meth) acrylate containing at least one hydroxyl group and optionally having an in-chain ether bond, and a monomer having a quaternary ammonium salt in its side chain, A hydrogel and a soft contact lens containing a copolymer obtained by copolymerizing at least a monomer mixture contained therein. |