Cross-linked polymer composition for use in soft contact lenses

Details Cross-linked polymer composition for use in soft contact lenses Cross-linked polymer composition for use in soft contact lenses

C - Chemistry, Metallurgy

08

L

88/40, 400/9047,

C08L 39/04 (2006.01) B29D 11/00 (2006.01) C08F 220/12 (2006.01) C08F 226/06 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1090937

CROSS-LINKED POLYMER COMPOSITION FOR USE IN SOFT CONTACT LENSES ABSTRACT OF THE DISCLOSURE Provided is a cross-linked polymer composition which can be in a transparent polymeric gel form having an equilibrium water content of at least 60 wt.% for use in soft contact lenses. The cross-linked polymer composition is prepared by polymerizing, using a bulk polymerization procedure, a monomer mixture comprising an alkyl methacrylate and an N-vinyllactam in the presence of a cross-linking agent comprising at least one compound selected from vinyl acrylate, vinyl methacrylate, triallyl isocyanurate and vinyl carboxylates expressed by the formula: R?COOCH = CH2)n where R is a hydrocarbon radical having 1 to 10 carbon atoms and n is an integer of 2, 3 or 4. - 1 -

289905

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