Improved process for the production of polysiloxane-based...

C - Chemistry – Metallurgy – 08 – G

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C08G 77/00 (2006.01) A61K 9/00 (2006.01) A61L 27/18 (2006.01) A61L 27/44 (2006.01) C08G 77/04 (2006.01) C08G 77/20 (2006.01) C08G 77/34 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2479239

A process for producing polysiloxane prepolymers of improved homogeneity for use in the production of relatively high refractive index polymeric compositions is described herein. Polymeric compositions so produced are useful in the production of ophthalmic devices such as for example intraocular lenses and corneal inlays. The preferred polymeric compositions are produced through the copolymerization of one or more polysiloxane prepolymers with hydrosilane-containing polysiloxanes.

L'invention concerne une méthode de production de prépolymères de polysiloxane présentant une homogénéité améliorée et destinés à être utilisés pour la production de compositions polymériques d'indice de réfraction relativement élevé. Les compositions polymériques ainsi produites sont utiles pour la production de dispositifs ophtalmiques, tels que, par exemple, des lentilles intraoculaires ou cornéennes. Des compositions polymériques préférées sont produites par copolymérisation d'un ou de plusieurs prépolymères de polysiloxane avec des polysiloxanes contenant hydrosilane.

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