Abstract:
A highly purified monomer-dye unit is disclosed. A method for producing a highly purified monomer-dye unit is also disclosed. A hydrophilic monomer is reacted with a dye under conditions that yield highly pure monomer-dye units.
Abstract:
The present invention relates to contact lenses made from polymeric material. Such contact lenses, also known often as "soft" contact lenses, are notably comfortable and permit diffusion of water and oxygen therethrough to the cornea.
Abstract:
Shaped hydrogel articles such as soft contact lenses are prepared by the steps of: (1) molding or casting a polymerization mixture comprising: (a) a monomer mixture comprising a major proportion of one or more hydrophilic monomers such as 2-hydroxyethyl methacrylate, and one or more cross-linking monomers; and (b) an inert, displaceable diluent selected from the group consisting of: (i) ethoxylated alkyl glucoside; (ii) ethoxylated bisphenol A; (iii) polyethylene glycol; (iv) mixture of propoxylated and ethoxylated alkyl glucoside; (v) single phase mixture of ethoxylated or propoxylated alkyl glucoside and C₂₋₁₂ dihydric alcohol; (vi) adduct of ε-caprolactone and C₂₋₆alkanediols and triols; (vii) ethoxylated C₃₋₆alkanetriol; and (viii) mixtures of one or more of (i) through (vii), under conditions to polymerize said monomer mixture to produce a shaped gel of a copolymer of said monomers and said diluent; and (2) thereafter replacing said diluent with water.
Abstract:
The invention provides compositions for forming ocular devices which compositions contain latent UV absorbers. The compositions of the invention may be used to conveniently and efficiently produce ocular devices through UV initiated, free radical polymerization.
Abstract:
An ophthalmic lens, particularly a soft hydrogel contact lens, is disclosed. The lens can be derived from a crosslinked polymer made by reacting a hydrophilic monomer with a crosslinking amount of a polyfunctional compound.
Abstract:
The present invention provides soft contact lenses adopted for placement over the cornea or in the eye which have a high oxygen permeability, a low water content and excellent mechanical properties. Moreover, the lenses of the instant invention have excellent protein and lipid deposition resistance relative to conventional contact lenses. Such lenses having the properties mentioned above comprises a prepolymer which contains an alkoxylate glucoside that is derivatized with at least one polysiloxane compound. The prepolymer is then placed in a suitable mold and polymerized by exposure to ultraviolet light.
Abstract:
A soft hydrogel contact lens, is disclosed. The lens is derived from a crosslinked polymer comprising the reaction product of a monomer mixture comprising: (A) a monounsaturated polyoxyethylene monomer; (B) a diunsaturated polyoxyethylene monomer of relatively high molecular weight; (C) a diunsaturated polyoxyethylene monomer of relatively low molecular weight; and (D) a hydrophilic monomer selected from the group consisting of hydroxyethyl methacrylate, methacrylic acid, N,N -dimethyl-acrylamide, N -vinyl pyrrolidone, glycerol monomethacrylate, itaconic acid, and mixtures thereof.
Abstract:
A highly purified monomer-dye unit is disclosed. A method for producing a highly purified monomer-dye unit is also disclosed. A hydrophilic monomer is reacted with a dye under conditions that yield highly pure monomer-dye units.