BIOMEDICAL DEVICES HAVING A SURFACE COATING
A biomedical device having a surface coating includes a bulk material having one or more biomedical device surface reactive functional groups and/or one or more biomedical device surface protected reactive functional groups and a surface coating. The surface coating is derived from a block copolymer including (a) monomeric units derived from an ethylenically unsaturated containing monomer having ring-opening reactive functionalities or nucleofugic functionalities that are complementary to the one or more biomedical device surface reactive functional groups and the one or more biomedical device surface protected reactive functional groups, and (b) monomeric units derived from an ethylenically unsaturated-containing hydrophilic monomer.
1 . A biomedical device having a surface coating, comprising a bulk material having one or more biomedical device surface reactive functional groups and/or one or more biomedical device surface protected reactive functional groups and a surface coating, the surface coating being derived from a block copolymer comprising (a) monomeric units derived from an ethylenically unsaturated containing monomer having ring-opening reactive functionalities or nucleofugic functionalities that are complementary to the one or more biomedical device surface reactive functional groups and the one or more biomedical device surface protected reactive functional groups, and (b) monomeric units derived from an ethylenically unsaturated-containing hydrophilic monomer.
2 . The biomedical device according to claim 1 , wherein the surface coating comprises the block copolymer diffused in the bulk material.
3 . The biomedical device according to claim 1 , wherein the surface coating comprises the block copolymer adsorbed, entangled or covalently attached to the surface of the biomedical device through the one or more biomedical device surface reactive functional groups and/or the one or more biomedical device surface protected reactive functional groups.
4 . The biomedical device according to claim 1 , wherein the one or more biomedical device surface reactive functional groups of the biomedical device are selected from the group consisting of a hydroxy group, a tosylate group, a mesylate group, a triflate group, a nosyloxy group, an amino group, a carboxy group, a carbonyl group, an aldehyde group, a sulfonic acid group, a sulfonyl chloride group, an isocyanato group, a carboxy anhydride group, a lactone group, an azlactone group, an epoxy group, a group capable of undergoing Michael addition-type reaction and mixtures thereof.
5 . The biomedical device according to claim 1 , wherein the one or more biomedical device surface reactive functional groups of the biomedical device are selected from the group consisting of a hydroxy group, an amino group, a carboxy group and mixtures thereof and the ring-opening reactive functionalities that are complementary to the one or more biomedical device surface reactive functional groups are selected from the group consisting of an azlactone group, an epoxy group and mixtures thereof.
6 . The biomedical device according to claim 1 , wherein the ethylenically unsaturated containing monomer having ring-opening reactive functionalities contains 2 to about 18 carbon atoms which is substituted by a reactive group selected from the group consisting of an azlactone group, an epoxy group and mixtures thereof, and the ethylenically unsaturated-containing hydrophilic monomer contains 2 to about 18 carbon atoms which is substituted by a reactive group selected from the group consisting of an amide group, a carboxy anhydride group, a carboxy group, a hydroxy group and mixtures thereof.
7 . The biomedical device according to claim 1 , wherein the ethylenically unsaturated containing monomer having ring-opening reactive functionalities is selected from
wherein R 2 , R 3 and R 4 are each independently hydrogen or C 1 -C 4 alkyl, and (Alk **) is a C 2 -C 12 alkylene.
8 . The biomedical device according to claim 1 , wherein the ethylenically unsaturated-containing hydrophilic monomer is selected from the group consisting of an acrylamide, a formamide, a cyclic lactam, a (meth)acrylated alcohol, an ethylenically unsaturated polymerizable alkoxylated polymer, a methacrylated sulfobetaine, a methacrylated phosphocholine and mixtures thereof.
9 . The biomedical device according to claim 1 , wherein the ethylenically unsaturated containing monomer having ring-opening reactive functionalities are represented by the following structures:
wherein n is from 1 to about 30; and wherein the monomeric units derived from an ethylenically unsaturated-containing hydrophilic monomer are monomeric units derived from an ethylenically unsaturated-containing hydrophilic monomer selected from the group consisting of an acrylamide, a formamide, a cyclic lactam, a (meth)acrylated alcohol, an ethylenically unsaturated polymerizable alkoxylated polymer, a methacrylated sulfobetaine, a methacrylated phosphocholine and mixtures thereof.
10 . The biomedical device according to claim 1 , wherein the block copolymer comprises from about 10 to about 60 monomeric units derived from the ethylenically unsaturated containing monomers having ring-opening reactive functionalities and from about 70 to about 250 monomeric units derived from the ethylenically unsaturated-containing hydrophilic monomer.
11 . The biomedical device according to claim 1 , wherein the block copolymer comprises from about 15 to about 45 monomeric units derived from the ethylenically unsaturated containing monomers having ring-opening reactive functionalities and from about 100 to about 200 monomeric units derived from the ethylenically unsaturated-containing hydrophilic monomer.
12 . The biomedical device according to claim 1 , wherein the block copolymer comprises monomeric units derived from glycidyl methacrylate and monomeric units derived from poly(alkylene glycol).
13 . The biomedical device according to claim 1 , wherein the block copolymer is one of a brush block copolymer or a comb block copolymer.
14 . The biomedical device according to claim 1 , wherein the biomedical device is an ophthalmic lens.
15 . The biomedical device according to claim 14 , wherein the ophthalmic lens is a contact lens or an intraocular lens.
16 . The biomedical device according to claim 1 , wherein the biomedical device is a silicone hydrogel continuous-wear lens.
17 . A method for making a biomedical device having a surface coating, the method comprising forming a surface coating on a biomedical device having one or more biomedical device surface reactive functional groups and/or one or more biomedical device surface protected reactive functional groups, the surface coating being derived from a block copolymer comprising (a) monomeric units derived from an ethylenically unsaturated containing monomer having ring-opening reactive functionalities or nucleofugic functionalities that are complementary to the one or more biomedical device surface reactive functional groups and the one or more biomedical device surface protected reactive functional groups, and (b) monomeric units derived from an ethylenically unsaturated-containing hydrophilic monomer.
18 . The method according to claim 17 , wherein forming the surface coating comprises diffusing the block copolymer in the biomedical device.
19 . The method according to claim 18 , wherein diffusing the block copolymer in the biomedical device comprises (a) soaking the biomedical device in a swelling solution comprising one or more solvents and the block copolymer; and (b) removing the biomedical device from the swelling solution to provide the biomedical device comprising the block copolymer diffused in the biomedical device.
20 . The method according to claim 17 , wherein forming the surface coating comprises one of adsorbing, entangling or covalently attaching the block copolymer to the surface of the biomedical device through the one or more biomedical device surface reactive functional groups and/or the one or more biomedical device surface protected reactive functional groups.