OPHTHALMIC DEVICES HAVING A HIGH REFRACTIVE INDEX
An ophthalmic device which is a polymerization product of a monomeric mixture including (a) one or more heterocyclic monomers having an ethylenically unsaturated reactive end group, (b) one or more aromatic monomers having an ethylenically unsaturated reactive end group, and (c) one or more crosslinking agents, wherein the ophthalmic device has a refractive index of greater than or equal to about 1.50.
1 . An ophthalmic device which is a polymerization product of a monomeric mixture comprising:
(a) one or more heterocyclic monomers having an ethylenically unsaturated reactive end group;
(b) one or more aromatic monomers having an ethylenically unsaturated reactive end group; and
(c) one or more crosslinking agents;
wherein the ophthalmic device has a refractive index of greater than or equal to about 1.50.
2 . The ophthalmic device according to claim 1 , wherein the one or more heterocyclic monomers having an ethylenically unsaturated reactive end group comprise one or more monocyclic heterocyclic monomers having an ethylenically unsaturated reactive end group.
3 . The ophthalmic device according to claim 2 , wherein the monocyclic heterocyclic monomers having an ethylenically unsaturated reactive end group comprises a C 3 -C 8 heterocyclic monomers having an ethylenically unsaturated reactive end group.
4 . The ophthalmic device according to claim 1 , wherein the one or more heterocyclic monomers having an ethylenically unsaturated reactive end group comprise one or more heterocyclic (meth)acrylic monomers.
5 . The ophthalmic device according to claim 1 , wherein the one or more heterocyclic monomers having an ethylenically unsaturated reactive end group comprise one or more heterocyclic (meth)acrylic monomers represented by a structure of Formula I:
wherein x is an integer from 1 to 6; y is an integer from 0 to 3; R 3 is hydrogen, a hydroxy group, a halogen group, a carboxyl group, a cyano group, a nitro group, an oxo (═O) group, a thio (═S) group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted alkoxy group; X is a heteroatom; D is O, S, or a bond; A is H or CH 3 ; and z is 0 to 4, provided that if D is a bond then at least one of y and z is 0.
6 . The ophthalmic device according to claim 1 , wherein the one or more heterocyclic (meth)acrylic monomers are selected from the group consisting of 3-(2-oxopyrrolidin-1-yl)propyl acrylate, 2-(2-oxopyrrolidin-1-yl)ethyl acrylate, 3-(2-oxopyrrolidin-1-yl)propyl methacrylate, 2-(2-oxopyrrolidin-1-yl)ethyl methacrylate, (2-oxopyrrolidin-1-yl)methyl methacrylate, 4-(2-oxopyrrolidin-1-yl)butyl methacrylate, (2-oxopyrrolidin-1-yl)methyl acrylate, 4-(2-oxopyrrolidin-1-yl)butyl acrylate, 3-(1H-pyrrol-1-yl)propyl acrylate), 3-(1H-pyrrol-1-yl)propyl methacrylate and mixtures thereof.
7 . The ophthalmic device according to claim 1 , wherein the aromatic group of the one or more aromatic monomers having an ethylenically unsaturated reactive end group is a substituted or unsubstituted monoaromatic or polyaromatic radical containing from about 5 to about 25 carbon atoms.
8 . The ophthalmic device according to claim 1 , wherein the aromatic group of the one or more aromatic monomers having an ethylenically unsaturated reactive end group is a substituted or unsubstituted monoaromatic radical containing from 6 to 12 carbon atoms directly bonded to an alkyl group.
9 . The ophthalmic device according to claim 1 , wherein the one or more aromatic monomers having an ethylenically unsaturated reactive end group comprise one or more aromatic (meth)acrylic monomers.
10 . The ophthalmic device according to claim 1 , wherein the one or more aromatic monomers having an ethylenically unsaturated reactive end group are one or more aromatic (meth)acrylic monomers selected from the group consisting of 2-phenylethyl acrylate, 2-phenylethyl methacrylate 2-phenoxyethyl acrylate, 2-phenoxyethyl methacrylate, 3-phenylpropyl acrylate, 3-phenylpropyl methacrylate and mixtures thereof.
11 . The ophthalmic device according to 1, comprising:
(a) about 20 weight percent to about 75 weight percent, based on the total weight of the monomeric mixture, of the one or more heterocyclic monomers having an ethylenically unsaturated reactive end group;
(b) about 30 weight percent to about 80 weight percent, based on the total weight of the monomeric mixture, of the one or more aromatic monomers having an ethylenically unsaturated reactive end group; and
(c) about 1 weight percent to about 10 weight percent, based on the total weight of the monomeric mixture, of the one or more crosslinking agents.
12 . The ophthalmic device according to claim 1 , comprising:
(a) about 20 weight percent to about 50 weight percent, based on the total weight of the monomeric mixture, of the one or more heterocyclic monomers having an ethylenically unsaturated reactive end group;
(b) about 40 weight percent to about 80 weight percent, based on the total weight of the monomeric mixture, of the one or more aromatic monomers having an ethylenically unsaturated reactive end group; and
(c) about 3 weight percent to about 5 weight percent, based on the total weight of the monomeric mixture, of the one or more crosslinking agents.
13 . The ophthalmic device according to claim 1 , wherein the one or more crosslinking agents are selected from the group consisting of 1,4-butanediol diacrylate, 1,4-butanediol dimethacrylate, ethylene glycol dimethacrylate, diethylene glycol) diacrylate, diethylene glycol) dimethacrylate, triethylene glycol diacrylate, triethylene glycol dimethacrylate, tetraethylene glycol diacrylate, tetraethylene glycol dimethacrylate, 1,3-propanediol diacrylate, 1,3-propanediol dimethacrylate, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, poly(ethylene glycol) diacrylate, poly(ethylene glycol) dimethacrylate, and poly(ethylene glycol) dimethacrylate.
14 . The ophthalmic device according to claim 1 , wherein the monomeric mixture further comprises one or more of a reactive ultraviolet absorber and a reactive blue-light absorber.
15 . The ophthalmic device according to claim 1 , having a Tg of less than 30° C. in the dry state.
16 . The ophthalmic device according to claim 1 , having an equilibrium water content (EWC) of greater than about 1% and up to about 10%.
17 . The ophthalmic device according to claim 1 , which is a thermally cured polymerization product.
18 . The ophthalmic device according to claim 1 , which is an intraocular lens.
19 . A method for making an ophthalmic device, comprising:
(a) providing a monomeric mixture comprising:
(i) one or more heterocyclic monomers having an ethylenically unsaturated reactive end group;
(ii) one or more aromatic monomers having an ethylenically unsaturated reactive end group; and
(iii) one or more crosslinking agents; and
(b) subjecting the monomeric mixture to polymerization conditions to provide an ophthalmic device having a refractive index of greater than or equal to about 1.50.
20 . The method according to claim 19 , wherein the monomeric mixture comprises:
(i) about 20 weight percent to about 75 weight percent, based on the total weight of the monomeric mixture, of the one or more heterocyclic monomers having an ethylenically unsaturated reactive end group;
(ii) about 30 weight percent to about 80 weight percent, based on the total weight of the monomeric mixture, of the one or more aromatic monomers having an ethylenically unsaturated reactive end group; and
(iii) about 1 weight percent to about 10 weight percent, based on the total weight of the monomeric mixture, of the one or more crosslinking agents.