Biomedical molding materials from semi-solid precursors

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 101/00 (2006.01) B29D 11/00 (2006.01) C08J 5/00 (2006.01) C08J 5/24 (2006.01) C08L 33/10 (2006.01) C08L 39/06 (2006.01) C08L 83/00 (2006.01) G02B 1/04 (2006.01) G02C 7/02 (2006.01)

Patent

CA 2451113

The present invention relates to a process for the production of polymeric moldings, such as medical device moldings and optical and ophthalmic lenses, preferably contact lenses and intraocular lenses. The invention also relates to a polymeric precursor mixture useful in polymeric moldings and to methods of making and using the polymeric precursor mixture. The semi-solid polymerizable precursor mixture comprises (i) a polymer blend, wherein the polymer blend consists of at least two dissimilar prepolymers or at least one prepolymer and a dead polymer; (ii) at least one non-reactive diluent; and (iii) optionally, at least one reactive plactisizer.

L'invention se rapporte à un procédé de production de corps moulés polymères, tels que des corps moulés servant de dispositifs médicaux et de lentilles optiques et ophtalmiques, de préférence des lentilles de contact et des lentilles intraoculaires. L'invention se rapporte également à un mélange précurseur polymère utilisé dans les corps moulés polymères ainsi qu'à des procédés de production et d'utilisation du mélange précurseur polymère. Le mélange précurseur polymérisable semi-solide comprend : (i) un mélange polymère, consistant en au moins deux pré-polymères dissemblables ou au moins un pré-polymère et un polymère inerte; (ii) au moins un diluant non-réactif; et (iii) facultativement, au moins un plastifiant réactif.

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