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US 2010/0063240 A1Published application
Novel Thermoplastic Hydrogel Polymer Compositions For Use In Producing Contact Lenses And Methods Of Producing Said Compositions
AssigneeOcutec Limited
InventorNeil Graham
Life of this patent
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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.
Claims23
A method of producing thermoplastic hydrogels for use in producing contact lenses, comprising the step of reacting one or more from the group of:
- polyethylene oxide,
- polyol, and
- polyamine,
- with a polyisocyanate and a polyfunctional amine or polyalcohol.
1 more element
(canceled)
20-27. (canceled)
29-39. (canceled)
Dependencies are inferred from the claim text.