Coated articles

G - Physics – 02 – B

Patent

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Details

G02B 1/04 (2006.01) A61L 27/34 (2006.01) C08J 7/16 (2006.01)

Patent

CA 2408938

The invention relates to novel composite materials comprising (a) an inorganic or organic bulk material having attached to its surface at least one polyionic material that comprises covalently bound initiator moieties for radical polymerization; and (b) a hydrophilic surface coating obtainable by applying one or more different ethylenically unsaturated hydrophilic monomers or macromonomers to the bulk material surface provided with the initiator radicals and polymerizing said monomers or macromonomers. The composite materials of the invention have desirable characteristics regarding adherence to the substrate, durability, hydrophilicity, wettability, biocompatibility and permeability and are thus useful for the manufacture of biomedical articles such as ophthalmic devices.

L'invention concerne des matériaux composites renfermant (a) un matériau inorganique ou organique en vrac à la surface duquel est fixé au moins un matériau polyionique à base de fractions d'initiateur à liaisons covalentes pour la polymérisation radicalaire; et (b) un revêtement de surface hydrophile résultant de l'application d'un ou plusieurs monomères ou macromonomères différents non saturés en éthylène, sur la surface du matériau en vrac comportant les radicaux initiateurs, et résultant enfin de la polymérisation de ces monomères ou macromonomères. Ce type de matériau offre les caractéristiques souhaitées dans les domaines suivants: adhérence au substrat, durabilité, hydrophilie, mouillabilité, biocompatibilité et perméabilité. Les matériaux considérés sont donc utiles pour la fabrication d'articles biomédicaux comme les dispositifs ophtalmiques.

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