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AssigneeJohnson & Johnson Vision Care, Inc.
InventorsBrian Aitken, Charles Scales, Scott Joslin, Yong Zhang, Dola Sinha, Shivkumar Mahadevan, Patricia Martin, Fang Lu, Donnie Duis, Stephen C. Arnold
Estimating the term…
Provided are polymer compositions made by a process comprising: (a) providing a first reactive composition containing: (i) a polymerization initiator that is capable, upon a first activation, of forming two or more free radical groups, at least one of which is further activatable by subsequent activation; (ii) one or more ethylenically unsaturated compounds; and (iii) a crosslinker; (b) subjecting the first reactive composition to a first activation step such that the first reactive composition polymerizes therein to form a crosslinked substrate network containing a covalently bound activatable free radical initiator, (c) combining the crosslinked substrate network with a second reactive composition containing one or more ethylenically unsaturated compounds; and (d) activating the covalently bound activatable free radical initiator of the crosslinked substrate network such that the second reactive composition polymerizes therein with the crosslinked substrate network to form a grafted polymeric network and a byproduct polymer. Also provided are precursors to the polymer compositions, processes for preparation of the polymer compositions, and methods of using the polymer compositions, for instance in medical devices.
A polymer composition formed by a process comprising:
A contact lens comprised of a crosslinked substrate network, wherein the crosslinked substrate network contains containing a covalently bound activatable free radical initiator, wherein the crosslinked substrate network is formed by a process comprising:
A process for making a polymer composition, the process comprising:
Dependencies are inferred from the claim text.