Novel thermoplastic hydrogel polymer cmpositions for use in producing contact lenses and methods of proucing said compositions
AssigneeOcutec Limited
InventorNeil Graham
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Abstract
The present invention relates generally to production of thermoplastic materials which swell in water to produce hydrogels. These materials will hereafter be referred to as “thermoplastic hydrogels”. They are useful as contact lenses or for use in vision correction prosthetics or as cosmetic devices. In particular, the invention relates to thermoplastic hydrogels which show improved flow characteristics.
Claims59
1-40. (canceled)
A thermoplastic hydrogel synthesis method, comprising the step of reacting one or more from the list consisting of polyethylene oxide, polyol, and polyamine, with a polyisocyanate and a mono or polyfunctional amine and/or a mono or polyalcohol, wherein the resulting product is in a non-macrogel state.
A thermoplastic hydrogel synthesis method, comprising the step of reacting one or more from the list consisting of polyethylene oxide, polyol,and polyamine, and a polyisocyanate and a mono or polyfunctional amine and/or a mono or polyalcohol that is prepared using a range of NCO:OH or NCO:NH2 ratios, wherein the resulting product is in a non-macrogel state.
A thermoplastic hydrogel comprising one or more from the list consisting of polyethylene oxide, polyol, polyamine, a polyisocyanate;
- a polyfunctional amine and a polyalcohol, and wherein the thermoplastic hydrogel is in a non-macrogel state.
A thermoplastic hydrogel comprising one or more from the list consisting of polyethylene oxide, polyol, polyamine, a polyisocyanate, a polyfunctional amine and a polyalcohol, wherein the thermoplastic hydrogel comprises a range of NCO:OH or NCO:NH2 ratios, and wherein the thermoplastic hydrogel is in a non-macrogel state.
Dependencies are inferred from the claim text.