Silicone hydrogels comprising N-vinyl amides and hydroxyalkyl (meth)acrylates or (meth)acrylamides
First Claim
1. A contact lens formed from a reaction mixture comprising,(a) from about 37 to about 70 wt % of at least one slow reacting monomer selected from the group consisting of N-vinylamide monomer of Formula I, vinyl pyrrolidone of Formula II or IV:
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Abstract
The present invention relates to a process comprising the steps of reacting a reactive mixture comprising at least one silicone-containing component, at least one hydrophilic component, and at least one diluent to form an ophthalmic device having an advancing contact angle of less than about 80°; and contacting the ophthalmic device with an aqueous extraction solution at an elevated extraction temperature, wherein said at least one diluent has a boiling point at least about 10° higher than said extraction temperature.
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Citations
37 Claims
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1. A contact lens formed from a reaction mixture comprising,
(a) from about 37 to about 70 wt % of at least one slow reacting monomer selected from the group consisting of N-vinylamide monomer of Formula I, vinyl pyrrolidone of Formula II or IV:
Specification