Contact lens of high water content and high water balance
AssigneeBenz Research and Development Corporation
InventorsPatrick H. Benz, Jose A. Ors
Life of this patent
Estimating the term…
Abstract
A contact lens of high water content and extremely high water balance made of a homopolymer or copolymer of 2,3-dihydroxypropyl methacrylate and methods of making such contact lenses, and polymers and hydrogels useful in such contact lenses.
Claims20
A contact lens formed of a copolymer formed from more than about 80 mole percent of 2,3-dihydroxypropyl methacrylate and from about 0.05 to about 20 mol percent of more or more of a N-alkenyl pyrolidone or alkoxy alkyl methacrylate of formula R1—O—R2-MA, wherein R1 and R2 are independently alkyl groups of 1 to 6 carbon atoms, and MA is methacrylate.
A hydrogel having a water content of at least about 60% by weight of the polymer formed from more than about 80 mole percent of 2,3-dihydroxypropyl methacrylate and from about 0.05 to about 20 mol percent of N-vinyl pyrolidone or alkoxy alkyl methacrylate of formula R1—O-13 R2-MA, wherein R1 and R2 are independently alkyl groups of 1 to 6 carbon atoms and MA is methyacrylate.
A contact lens formed of a polymer formed from more than about 92 mole percent of 2,3-dihydroxypropyl methacrylate, wherein the polymer has a water content of at least about 60% by weight of the polymer.
A method of making a polymer including more than 90 mol percent of units from 2,3-dihydroxypropyl methacrylate, comprising polymerizing 2,3-dihydroxypropyl methacrylate in the presence of a reactive or non-reactive polar aprotic diluent.
A method of making a contact lens, comprising polymerizing 2,3-dihydroxypropyl methacrylate in the presence of a reactive or non-reactive polar aprotic diluent to form a polymer having more than 90 mol percent of units from 2,3-dihydroxypropyl methacrylate, and forming said polymer into a contact lens.
Dependencies are inferred from the claim text.