High refractive index aromatic-based prepolymers
View Patent ↗Relatively high refractive index polymeric compositions and ophthalmic devices such as for example intraocular lenses and corneal inlays made therefrom are described herein. The preferred polymeric compositions are produced through the copolymerization of one or more aromatic-substituted polysiloxane prepolymers with one or more aromatic monomers, alkylated monomers or hydrophilic monomers.
1. A method of producing an ophthalmic device using a polymeric composition, said method comprising:
casting said polymeric composition in the form of a rod;
lathing or machining said rod into disks; and
lathing or machining said disks into an ophthalmic device;
wherein said polymeric composition comprises a copolymer of: (a) one or more aromatic monomers, alkyl monomers, hydrophilic monomers, or a combination thereof; and (b) a prepotymer having a formula of
wherein the V groups are the same or different unsaturated photo or thermal polymerizable substituents of the general structure R 3 CH═C(R 4 )(CH 2 ) p (W) q (Z) q (Ar) q R 5 ; the R groups are the same or different saturated C 1-10 hydrocarbon substituents; the R 1 groups are the same or different C 1-10 alkyl substituents; the R 2 groups are the same or different selected from the group consisting of C 1-10 alkyl substituents, C 1-10 fluoroalkyl substituents, C 2-20 alkyl-fluoroalkyl substituents and C 6-30 aromatic substituents the L groups, which are absent or present, where present are the same or different urethane, urea, carbonate or ester linkages; y is a natural number greater than 4 representing the sum of siloxane moieties with randomly differing R 2 groups as defined above so as to have a molar ratio of aromatic substltuents to alkyl substituents no less than 1:4; x is a natural number such that the prepolymer molecular weight is at least approximately 1000 and refractive index is at least approximately 1.45; R 3 is selected from the group consisting of hydrogen, C 1-10 alkyl and —CO—U; R 4 is selected from the group consisting of hydrogen and methyl; R 5 is a C 1-10 divalent alkylene radical; the W group is selected from the group consisting of —CO— and —OCO—; the Z group is selected from the group consisting of —O— and —NH—; the Ar groups are the same or different C 6-30 aromatic radicals; p is a non-negative integer less than 7; q is either 0 or 1; and U is selected from the group consisting of —OC 1-12 alkyl radical, —SC 1-12 alkyl radical and —NHC 1-12 alkyl radical.
2. A method of producing an ophthalmic device using a polymeric composition, said method comprising:
pouring said polymeric composition prior to curing into a mold;
curing said polymeric composition; and
removing said polymeric composition from said mold following curing thereof;
wherein said polymeric composition comprises a material having a formula of
wherein the V groups are the same or different unsaturated photo or thermal polymerizable substituents of the general structure R 3 CH═C(R 4 )(CH 2 ) p (W) q (Z) q (Ar) q R 5 ; the R 1 groups are the same or different saturated C 1-10 a hydrocarbon substituents; the R 1 groups are the same or different C 1-10 alkyl substituents; the R 2 groups are the same or different selected from the group consisting of C 1-10 alkyl substituents, C 1-10 fluoroalkyl substituents, C 2-20 alkyl-fluoroalkyl substituents and C 6-30 aromatic substituents; the L groups, which are absent or present, where present are the same or different urethane, urea, carbonate or ester linkages; y is a natural number greater than 4 representing the sum of siloxane moieties with randomly differing R 2 groups as defined above so as to have a molar ratio of aromatic substituents to alkyl substituents no less than 1:4; x is a natural number such that the prepolymer molecular weight is at least approximately 1000 and refractive index is at least approximately 1.45; R 3 is selected from the group consisting of hydrogen, C 1-10 alkyl and —CO—U; R 4 is selected from the group consisting of hydrogen and methyl; R 5 is a C 1-10 divalent alkylene radical; the W group is selected from the group consisting of —CO— and —OCO—; the Z group is selected from the group consisting of —O— and —NH—; the Ar groups are the same or different C 6-30 aromatic radicals; p is a non-negative integer less than 7; q is either 0 or 1; and U is selected from the group consisting of —OC 1-12 alkyl radical, —SC 1-12 alkyl radical and —NHC 1-12 alkyl radical.