C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 33/14 (2006.01) C08L 33/10 (2006.01) C08L 39/06 (2006.01) G02B 1/04 (2006.01)
Patent
CA 2212324
A method for producing moisture-containing soft contact lenses by polymerizing monomers for contact lenses in the presence of a diluent for monomers and substituting the diluent contained in the resulting polymer with an aqueous solution, wherein the diluent is composed of one or more compounds selected from the group consisting of triethylene glycol, diethylene glycol monomethyl ether and triethylene glycol monomethyl ether and a moisture-containing contact lens composed of a copolymer of the following main components, (1) two or more kinds of hydrophilic monomers selected from the group consisting of 2-hydroxyethyl methacrylate, N-vinyl-2-pyrrolidone and N,N-dimethylacrylamide, (2) an alkyl methacrylate and (3) a crosslinkable monomer, and an aqueous solution, which has a moisture content of 50-70% and exhibits a penetration strength of 1100 gf/mm or more. The contact lens of the present invention is optically transparent and exhibit excellent mechanical strength.
Imafuku Suguru
Iwamoto Hidetoshi
Motono Soichiro
Dennison Associates
Hoya Corporation
Hoya Healthcare Corporation
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