Crosslinkable or polymerizable prepolymers

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 290/04 (2006.01) C08F 8/00 (2006.01) C08F 8/30 (2006.01) C08F 255/00 (2006.01) C08F 257/02 (2006.01) C08F 265/04 (2006.01) C08F 265/10 (2006.01) C08F 271/00 (2006.01) C08F 283/12 (2006.01) C08F 291/00 (2006.01) C08J 3/24 (2006.01) C08L 51/00 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2401865

The invention relates to novel crosslinkable copolymers which are obtainable by (a) copolymerizing at least one hydrophilic monomer having one ethylenically unsaturated double bond and at least one crosslinker comprising two ore more ethylenically unsaturated double bonds in the presence of a chain transfer agent having a functional group; and (b) reacting one or more functional group of the resulting copolymer with an organic compound having an ethylenically unsaturated group. The crosslinkable copolymers of the invent are especially useful for the manufacture of biomedical mouldings, for example ophthalmic mouldings such as in particular contact lenses.

L'invention se rapporte à de nouveaux polymères réticulables qu'il est possible d'obtenir (a) en copolymérisant au moins un monomère hydrophile ayant une double liaison éthyléniquement insaturée et au moins un agent de réticulation comportant au moins deux doubles liaisons éthyléniquement insaturées, en présence d'un agent de transfert de chaîne ayant un groupe fonctionnel; et (b) en faisant réagir un ou plusieurs groupes fonctionnels du copolymère résultant avec un composé organique ayant un groupe éthyléniquement insaturé. Les copolymères réticulables de la présente invention s'avèrent particulièrement utiles à la fabrication de moulages biomédicaux, par exemple de moulages ophtalmiques tels que, en particulier, des lentilles de contact.

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