摘要:
A method of forming an ophthalmic lens suited for extended-wear periods without a clinically significant amount of corneal swelling and without substantial wearer discomfort. The lens has a balance of oxygen permeability and ion or water permeability, with the ion or water permeability being sufficient to provide good on-eye movement, such that a good tear exchange occurs between the lens and the eye. The manufacturing method requires the oxygen concentration of the polymerizable material to be low enough to produce a lens having a high ion permeability. A preferred oxygen concentration in the polymerizable material is a concentration below 200 ppm.
摘要:
The present invention describes a free-radical-polymerizable macromer of the formula (I) based on an unsubstituted or symmetrically substituted perfluoroalkyl ether; a polymer comprising the product of the polymerization of a novel macromer; alone or together with at least one vinylic comonomer; a process for the preparation of a macromer and a polymer; mouldings, contact lenses, corneal implants and biomedical articles made from a polymer; and articles coated with a macromer of the formula (I) or a polymerization product thereof.
摘要:
The present invention relates to coated articles wherein the polymer chains of the coating are obtainable by after-glow plasma-induced polymerization of a monomer under specific plasma conditions. The invention further relates to a method for the production of articles coated with a polymer of said features.
摘要:
The invention relates to novel composite materials comprising (a) an inorganic or organic bulk material having covalently bound to its surface initiator moieties for radical polymerization; and (b) a hydrophilic surface coating obtainable by applying one or more different ethylenically unsaturated hydrophilic macromonomers of formula (1) as outlined in the claims to the bulk material surface provided with the initiator radicals and polymerizing said 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.
摘要:
A method of making an ophthalmic lens comprising the steps of: preparing a polymerizable composition comprising excessive oxygen content; contacting the polymerizable composition with a gas that is inert or substantially inert to the polymerizable composition, and deoxygenating or partially deoxygenating the polymerizable composition; conveying all or part of the polymerizable composition to an ophthalmic lens mold; polymerizing all or part of the polymerizable composition and obtaining a polymeric ophthalmic lens, and the lens produced by such process.
摘要:
The present invention describes a polymer and a precursor thereof; a prepolymer made essentially from a macromer that is cross-linked, for example, via its free hydroxy groups with a polyisocyanate, the macromer being made essentially from a polysiloxane and a polyol component; processes for the production of such prepolymers and polymers; the use of such polymers, for example, as artificial corneas, as moulded articles, especially as contact lens material; also the use of a prepolymer or polymer for coating surfaces, especially functionalised polymer surfaces.
摘要:
The present invention relates to coated articles wherein the polymer chains of the coating are obtainable by after-glow plasma-induced polymerization of a monomer under specific plasma conditions. The invention further relates to a method for the production of articles coated with a polymer of said features.