Diester monomer, its polymer, water-containing soft contact lens, and processing solution for contact lens

摘要

A diester monomer is represented by the formula (I) wherein R₁, R₂ and R₃ represent a hadrogen atom, an alkoxy, alkenyloxy or hydroxyalkyloxy carbonyl group having 1 to 20 carbon atoms, or a phosphorylcholine derivative group of the formula where Y denotes -(CH₂, -(CH₂CH₂O)_nCH₂CH₂ or- n denotes 1 to 8, m is an integer of 0 or 1, R₄, R₅ and R₆ denote an alkyl or aryl group having 1 to 8 carbon atoms, or a hydroxyalkyl group having 2 to 20 carbon atoms; on the proviso that if R₁ is a hydrogen atom, neither R₂ nor R₃ is a hydrogen atom and at least one of R₂ and R₃ denotes the aforesaid phosphorylcholine derivative group, and that if R₂ is a hydrogen atom, neither R₁ nor R₃ is a hydrogen atom and at least one of R₁ and R₃ denotes the aforesaid phosphorycholine derivative group. A polymer and a water-containing contact lens are obtained by polymerizing a starting component material including the above-mentioned diester monomer of the formula (I). A contact lens processing solution includes the polymer and a solvent for dissolving the polymer.