Polymerizable surfactants and their use as device forming comonomers
View Patent ↗This invention describes the use of polymerizable surfactants as comonomers in forming ophthalmic devices such as contact lenses, intraocular lenses, corneal implants, etc.
1. An ophthalmic device comprising:
a polymerized comonomer mixture comprising at least one polymerizable surfactant selected from the group consisting of a poloxamer di(meth)acrylate, a reverse poloxamer di(meth)acrylate, a poloxamine di(meth)acrylate, a reverse poloxamine di(meth)acrylate and mixtures thereof, wherein the at least one polymerizable surfactant is present in the comonomer mixture prior to polymerization in an amount of about 0.1 to about 4.9% weight percent, and further wherein the ophthalmic device is a contact lens, an intraocular lens or a corneal implant.
2. The ophthalmic device of claim 1 , wherein the contact lens is a rigid gas permeable contact lens.
3. The ophthalmic device of claim 1 , wherein the contact lens is a soft contact lens.
4. The ophthalmic device of claim 1 , wherein the contact lens is a hydrogel contact lens.
5. The ophthalmic device of claim 1 , wherein the intraocular lens is a phakic intraocular lens.
6. The ophthalmic device of claim 1 , wherein intraocular the lens is an aphakic intraocular lens.
7. The ophthalmic device of claim 1 , wherein the device is a corneal implant.
8. The ophthalmic device of claim 1 , further comprising as part of the comonomer mixture an organo silicon compound.
9. The ophthalmic device of claim 8 , wherein the organo silicon compound is selected from the group consisting of siloxanyl (meth)acrylate, siloxanyl (meth)acrylamide, siloxynyl vinyl carbamate, polymerizable siloxane oligomers and macromonomers and mixtures thereof.
10. The ophthalmic device of claim 8 , further comprising as part of the comonomer mixture at least one member selected from the group consisting of crosslinking agents, internal wetting agents, hydrophilic monomers and toughening agents.
11. The ophthalmic device of claim 10 , wherein the hydrophilic monomers are selected from the group consisting of hydrophilic acrylic-, methacrylic-, itaconic-, styrenyl-, acrylamido-, methacrylamido- and vinyl-containing monomers and mixtures thereof.
12. The ophthalmic device of claim 11 , wherein the hydrophilic monomers are selected from the group consisting of monomers containing the acrylic group represented by the formula:
wherein X is hydrogen or methyl and Y is OH, OQ, NH, NQ and NH(Q), and Q is an alkyl or substituted alkyl group; and mixtures thereof.
13. The ophthalmic device of claim 11 , wherein the vinyl-containing hydrophilic monomers are selected from the group consisting of N-vinyllactams, N-vinylpyrrolidone, N-vinyl-N-methylacetamide, N-vinyl-N-ethylacetamide, N-vinyl-N-ethylformamide, N-vinylformamide, and mixtures thereof.
14. The ophthalmic device of claim 11 , wherein the hydrophilic monomers are selected from the group consisting of as N,N-dimethylacrylamide, 2-hydroxyethyl methacrylate, glycerol methacrylate, 2-hydroxyethyl methacrylamide, methacrylic acid, acrylic acid and mixtures thereof.
15. The ophthalmic device of claim 1 , further comprising as part of the comonomer mixture an ethylenically unsaturated hydrophilic monomer selected from the group consisting of ethylenically unsaturated polyoxyalkylenes, ethylenically unsaturated polyacrylamides, ethylenically unsaturated polyvinylpyrrolidones, ethylenically unsaturated polyvinyl alcohols, ethylenically unsaturated poly (hydroxyethyl methacrylate), ethylenically unsaturated N-alkyl-N-vinyl acetamides and mixtures thereof.
16. The ophthalmic device of claim 15 , wherein the ethylenic unsaturation is provided by a group selected from (meth)acrylate, (meth)acrylamide, styrenyl, alkenyl, vinyl carbonate, vinyl carbamate groups and mixtures thereof.
17. The ophthalmic device of claim 1 , wherein the comonomer mixture further comprises hydrophobic monomers.
18. The ophthalmic device of claim 17 , wherein the hydrophobic monomer is selected from the group consisting of alkyl (meth)acrylates, N-alkyl (meth)acrylamides, alkyl vinylcarbonates, alkyl vinylcarbamates, fluoroalkyl (meth)acrylates, N-fluoroalkyl (meth)acrylamides, N-fluoroalkyl vinylcarbonates, N-fluoroalkyl vinylcarbamates, silicone-containing (meth)acrylates, (meth)acrylamides, vinyl carbonates, vinyl carbamates, styrenic monomers, polyoxypropylene (meth)acrylates, methyl methacrylate, dodecyl methacrylate, octafluoropentyl methacrylate, perfluorooctyl methacrylate, methacryoyl oxypropyl tris(trimethylsiloxy)silane (TRIS) and mixtures thereof.
19. The ophthalmic device of claim 1 , wherein the comonomer mixture further comprises a free radical thermal polymerization initiator selected from the group consisting of acetyl peroxide, lauroyl peroxide, decanoyl peroxide, stearoyl peroxide, benzoyl peroxide, t-butyl peroxypivalate, peroxydicarbonate and mixtures thereof.
20. The ophthalmic device of claim 1 , wherein the comonomer mixture further comprises a UV initiator.
21. A method of forming an ophthalmic device comprising:
(a) providing a polymerizable mixture comprising a comonomer mixture comprising at least one polymerizable surfactant selected from the group consisting of poloxamer di(meth)acrylate, a reverse poloxamer di(meth)acrylate, a poloxamine di(meth)acrylate, a reverse poloxamine di(meth)acrylate and mixtures thereof, wherein the at least one polymerizable surfactant is present in the comonomer mixture in an amount of about 0.1 to about 4.9% weight percent;
(b) subjecting the polymerizable mixture to polymerizing conditions; and,
(c) shaping the polymerizable mixture into the desired shape of the ophthalmic device, and further wherein the ophthalmic device is a contact lens, an intraocular lens or a corneal implant.
22. The method of claim 21 , wherein the step of shaping occurs after subjecting the polymerizable mixture to polymerization conditions.
23. The method of claim 21 , wherein the step of shaping comprises cutting, lathing, polishing and combinations thereof.
24. The method of claim 21 , further comprising the step of placing the polymerizable mixture comprising a comonomer mixture comprising at least one polymerizable surfactant selected from the group consisting of poloxamer di(meth)acrylate, a reverse poloxamer di(meth)acrylate, a poloxamine di(meth)acrylate, a reverse poloxamine di(meth)acrylate and mixtures thereof in a mold prior to the step of subjecting the polymerizable mixture to polymerization conditions.
25. The method of claim 24 , wherein the step of polymerizing is conducted in a mold selected from the group consisting of spinning molds and stationary molds.
26. The method of claim 21 , wherein the step of polymerizing is conducted in an appropriate mold or vessel to form buttons, plates or rods.
27. The method of claim 21 , further comprising the step of hydrating the polymerized mixture.
28. The ophthalmic device of claim 1 , wherein the at least one ethylenically unsaturated end group polymerizable surfactant is a poloxamer di(meth)acrylate.
29. A hydrogel contact lens comprising:
a polymerized comonomer mixture comprising (a) N-vinylpyrollidone; (b) 2-hydroxyethyl methacrylate; (c) 4-t-butyl-2-hydroxycyclohexyl methacrylate; and (d) a poloxamer dimethacrylate, wherein the poloxamer dimethacrylate is present in the comonomer mixture prior to polymerization in an amount of about 0.1 to about 4.9% weight percent.