Ocular lens material

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 65/48 (2006.01) C08L 71/12 (2006.01) C08L 79/08 (2006.01) C08L 83/16 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2167871

A transparent ocular lens material comprising a silicon-containing polymer having a recurring unit represented by the general formula (I): Image (I) wherein each of R1, R2, R3 and R4 is independently hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or a group represented by the general formula (II): Image (II) in which each of R5, R6 and R7 is independently an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or phenyl group. The ocular lens material has excellent transparency, high oxygen permeability and heat resistance, and excellent ultraviolet-ray absorbing properties and forming and processing properties, and has a relatively high refractive index.

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