Contact lens and process for preparing the same

Details Contact lens and process for preparing the same Contact lens and process for preparing the same

C - Chemistry, Metallurgy

08

G

18/106, 402/247,

C08G 2/00 (2006.01) B29D 11/00 (2006.01) C08F 8/12 (2006.01) C08G 16/00 (2006.01) C08G 59/00 (2006.01) C08G 65/00 (2006.01) C08J 7/12 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1187645

Abstract of the Disclosure A water-absorptive contact lens made of a copolymer comprising units of an ester of acrylic or methacrylic acid and at least one saccharide selected from D-galactose, D-glucose and D-mannose and units of at least one member selected from a hydrophilic monomer and a hydrophobic monomer, which has excellent oxygen permeability and affinity for the eye and can be worn continuously for a long period of time. The contact lens is prepared by polymerizing a monomer mixture containing an ester of acrylic or methacrylic acid with a ketalized saccharide and a hydrophilic monomer and/or a hydrophobic monomer, and after forming the resulting copolymer into a contact lens, if necessary, treating the copolymer having a shape of contact lens with an acid to convert the ketal groups into hydroxyl groups.

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