Polysiloxanes, method of synthesis and ophthalmic compositions

Details Polysiloxanes, method of synthesis and ophthalmic compositions Polysiloxanes, method of synthesis and ophthalmic compositions

C - Chemistry, Metallurgy

08

G

C08G 77/18 (2006.01) B29D 11/00 (2006.01) C08G 77/20 (2006.01)

Patent

CA 2589660

A linear polysiloxane copolymer has at least one terminal hydroxyalkyl group. The copolymer is preparable by a process comprising a combination of a base- catalysed polymerisation with an acid-catalysed redistribution, and is suitable for preparing ophthalmic compositions for forming an intraocular lens in situ.

L'invention porte sur un copolymère de polysiloxane linéaire qui comporte au moins un groupement terminal de type hydroxyalkyle. Ledit copolymère peut être synthétisé suivant un procédé comprenant la combinaison d~une polymérisation à catalyse basique et d~une redistribution à catalyse acide, et peut être employé dans l'élaboration de préparations ophtalmiques formant une lentille intra-oculaire in situ.

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