Oxygen permeable hard contact lens

Details Oxygen permeable hard contact lens Oxygen permeable hard contact lens

G - Physics

02

C

88/40, 402/9

G02C 7/04 (2006.01) B29D 11/00 (2006.01) C08F 230/08 (2006.01) C08G 77/20 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1184341

Abstract of the Disclosure An oxygen permeable hard contact lens having an improved oxygen permeability and an improved fragility as well as excellent hardness and rigidity, made of a copolymer comprising an organosilane or organosiloxane having in one molecule at least one group of the general formula (I): Image (I) wherein R1 is hydrogen atom or methyl group, k is 0 or 1, and ? is 1 or 3, and having at most 16 silicon atoms, and a fluoroalkyl acrylate or methacrylate of the general formula (II): Image (II) wherein R1 is as defined above, m is 0 or 1, n is 0 or an integer of 1 to 3, and Rf is a straight or branched fluoroalkyl group having 2 to 21 fluorine atoms.

420023

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