Ophthalmic devices
An ophthalmic device which is a polymerization product of a monomeric mixture includes (a) one or more cationic initiators comprising one or more polymerizable groups; and (b) one or more alkyl-substituted oxazolines.
1 . An ophthalmic device which is a polymerization product of a monomeric mixture comprising:
(a) one or more cationic initiators comprising one or more polymerizable groups; and
(b) one or more alkyl-substituted oxazolines.
2 . The ophthalmic device according to claim 1 , wherein the one or more cationic initiators comprising one or more polymerizable groups comprise one or more sulfonate cationic initiators comprising one or more polymerizable groups.
3 . The ophthalmic device according to claim 1 , wherein the one or more cationic initiators comprising one or more polymerizable groups comprise one or more of a substituted or unsubstituted alkyl- and aryl-containing sulfonate cationic initiator comprising one or more polymerizable groups or a fluorinated substituted or unsubstituted alkyl- and aryl-containing sulfonate cationic initiator comprising one or more polymerizable groups.
4 . The ophthalmic device according to claim 1 , wherein the one or more cationic initiators comprising one or more polymerizable groups comprise one or more sulfonate cationic initiators selected from the group consisting of tosylate, nosylate, mesylate, and triflate, each comprising one or more polymerizable groups.
5 . The ophthalmic device according to claim 1 , wherein the one or more polymerizable groups of the one or more cationic initiators comprise one or more of a (meth)acrylate end group, a vinyl end group, and an acrylamide end group.
6 . The ophthalmic device according to claim 1 , wherein the one or more cationic initiators comprising one or more polymerizable groups are derived from a reaction product of a hydroxyl-containing (meth)acrylate and a compound of the formula R—SO 2 —X where R is a hydrocarbon radical or moiety and X is a halogen.
7 . The ophthalmic device according to claim 1 , wherein the polymerization product comprises a brush polymeric network comprising poly(2-alkyloxazoline) repeating units in the polymer backbone represented by the formula:
where R is an alkyl group of 1 to 12 carbon atoms.
8 . The ophthalmic device according to claim 7 , wherein the brush polymeric network comprises from about 3 to about 150 repeating units of the poly(2-alkyloxazoline) in the polymer backbone.
9 . The ophthalmic device according to claim 1 , wherein the monomeric mixture comprises:
about 0.1 wt. % to about 30 wt. %, based on the total weight of the monomeric mixture, of the one or more cationic initiators; and
about 10 wt. % to about 80 wt. %, based on the total weight of the monomeric mixture, of the one or more alkyl-substituted oxazolines.
10 . The ophthalmic device according to claim 1 , wherein the monomeric mixture further comprises one or more crosslinking agents.
11 . The ophthalmic device according to claim 10 , wherein the one or more crosslinking agents comprise an ethylenically unsaturated polymerizable alkoxylated polymer.
12 . The ophthalmic device according to claim 11 , wherein the one or more ethylenically unsaturated polymerizable alkoxylated polymers comprise one or more polymerizable polyethylene glycols having a number average molecular weight of 100 to about 1000.
13 . The ophthalmic device according to claim 10 , wherein the one or more crosslinking agents comprise one or more end functionalized poloxamers.
14 . The ophthalmic device according to claim 10 , wherein the monomeric mixture comprises about 0.5 wt. % to about 30 wt. %, based on the total weight of the monomeric mixture, of the one or more crosslinking agents.
15 . The ophthalmic device according to claim 1 , wherein the monomeric mixture further comprises one or more hydrophilic monomers selected from the group consisting of an acrylamide and a vinyl lactam.
16 . The ophthalmic device according to claim 15 , wherein the monomeric mixture comprises about 10 wt. % to about 80 wt. %, based on the total weight of the monomeric mixture, of the one or more hydrophilic monomers.
17 . The ophthalmic device according to claim 1 , wherein the monomeric mixture further comprises one or more protected hydrophilic monomers selected from the group consisting of a protected (meth)acrylic acid and a protected hydroxyl-containing-(meth)acrylate.
18 . The ophthalmic device according to claim 1 , wherein the monomeric mixture further comprises one or more ultraviolet blockers.
19 . The ophthalmic device according to claim 1 , which is one or more of a contact lens, an intraocular lens and a corneal implant.
20 . A method for making an ophthalmic device, comprising:
(a) providing an ophthalmic device-forming monomeric mixture comprising:
(i) one or more cationic initiators comprising one or more polymerizable groups; and
(ii) one or more alkyl-substituted oxazolines;
(b) subjecting the mixture to polymerization conditions to provide a polymerized ophthalmic device; and
(c) hydrating the polymerized ophthalmic device.