C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
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.
Hiratani Haruyuki
Ichinohe Shoji
Nakada Kazuhiko
Yamazaki Toshio
Menicon Co. Ltd.
Osler Hoskin & Harcourt Llp
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