Claims
- 1. A high refractive index, curable polyorganosiloxane composition useful for fabricating intraocular lenses, said composition comprising:
- about 30 wt. % to about 55 wt. % of a first vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said first vinyl terminated copolymer resin having about 80 mole % to about 95 mole % dimethylsiloxane and about 5 mole % to about 20 mole % diphenylsiloxane, said first vinyl terminated copolymer resin having a molecular weight sufficient to provide a first vinyl terminated copolymer resin viscosity of about 400 cps to about 2500 cps;
- about 45 wt. % to about 70 wt. % of a second vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said second vinyl terminated copolymer resin having about 80 mole % to about 95 mole % dimethylsiloxane and about 5 mole % to about 20 mole % diphenylsiloxane, said second vinyl terminated copolymer resin having a molecular weight sufficient to provide a second vinyl terminated copolymer resin viscosity of about 2500 cps to about 9500 cps;
- about 8 to about 25 parts of fumed silica filler per hundred parts resin;
- tetrakis(dimethylsiloxy) silane crosslinking reagent; and
- 2-[5-chloro-2H-benzotriazol-2-yl]-6-[1,1-dimethylethyl]-4-[2-propenyloxypropyl]phenol hydrosilylated with tetrakis(dimethylsiloxy)silane.
- 2. The high refractive index, curable polyorganosiloxane composition of claim 1 wherein said first vinyl terminated copolymer resin has the formula: ##STR3## where R is a monovalent organic radical selected from the group consisting of CH.sub.3 and CH.dbd.CH.sub.2 and n+m is an integer sufficient to provide said first vinyl terminated copolymer viscosity of from about 400 cps to about 2500 cps.
- 3. The high refractive index, curable polyorganosiloxane composition of claim 1 wherein said second vinyl terminated copolymer resin has the formula: ##STR4## where R is a monovalent organic radical selected from the group consisting of CH.sub.3 and CH.dbd.CH.sub.2 and n+m is an integer sufficient to provide said second vinyl terminated copolymer viscosity of from about 2500 cps to about 9500 cps.
- 4. The high refractive index, curable polyorganosiloxane composition of claim 1 wherein said fumed silica filler has an average particle diameter of from about 7 nanometers to about 11 nanometers.
- 5. The high refractive index, curable polyorganosiloxane composition of claim 1 wherein said fumed silica is surface treated with a member selected from the group consisting of hexamethyldisilazane and 1,3-divinyltetramethyldisilazane.
- 6. An elastomeric, optically clear, high refractive index lens having superior post-folding optical resolution recovery, said lens comprising a polyorganosiloxane obtained by curing the curable, high refractive index, polyorganosiloxane composition of claim 1.
- 7. A high refractive index, curable polyorganosiloxane composition useful for fabricating intraocular lenses, said composition comprising:
- about 30 wt. % to about 55 wt. % of a first vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said first vinyl terminated copolymer resin having about 80 mole % to about 95 mole % dimethylsiloxane and about 5 mole % to about 20 mole % diphenylsiloxane, said first vinyl terminated copolymer resin having a molecular weight sufficient to provide a first vinyl terminated copolymer resin viscosity of about 400 cps to about 2500 cps;
- about 45 wt. % to about 70 wt. % of a second vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said second vinyl terminated copolymer resin having about 80 mole % to about 95 mole % dimethylsiloxane and about 5 mole % to about 20 mole % diphenylsiloxane, said second vinyl terminated copolymer resin having a molecular weight sufficient to provide a second vinyl terminated copolymer resin viscosity of about 2500 cps to about 9500 cps;
- about 8 to about 25 parts of fumed silica filler per hundred parts resin;
- tetrakis(dimethylsiloxy) silane crosslinking reagent; and
- 2-[5-chloro-2H-benzotriazol-2-yl]-6-[1,1-dimethylethyl]-4-[2-propenyloxypropyl]phenol hydrosilylated with a terpolymer of dimethylsiloxane, diphenylsiloxane, and methylhydrosiloxane.
- 8. The high refractive index, curable polyorganosiloxane composition of claim 7 wherein said fumed silica has an average particle size of about 7 nanometers to about 11 nanometers.
- 9. An elastomeric, optically clear, high refractive index lens having superior postfolding optical resolution recovery, said lens comprising a polyorganosiloxane obtained by curing the curable, high refractive index, polyorganosiloxane composition of claim 7.
- 10. The high refractive index, curable polyorganosiloxane composition of claim 7 wherein said fumed silica is surface treated with a member selected from the group consisting of hexamethyldisilazane and 1,3-divinyltetramethyldisilazane.
- 11. A high refractive index, curable polyorganosiloxane composition useful for fabricating intraocular lenses, said composition comprising:
- about 42 wt. % to about 48 wt. % of a first vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said first vinyl terminated copolymer resin having about 82 mole % to about 88 mole % dimethylsiloxane and about 12 mole % to about 18 mole % diphenylsiloxane, said first vinyl terminated copolymer resin having a molecular weight sufficient to provide a first vinyl terminated copolymer resin viscosity of about 400 cps to about 1000 cps, and
- about 52 wt. % to about 58 wt. % of a second vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said second vinyl terminated copolymer resin having about 82 mole % to about 88 mole % dimethylsiloxane and about 12 mole % to about 18 mole % diphenylsiloxane, said second vinyl terminated copolymer resin having a molecular weight sufficient to provide a second vinyl terminated copolymer resin viscosity of about 4400 cps to about 5400 cps;
- about 8 to about 25 parts of fumed silica filler per hundred parts resin;
- tetrakis(dimethylsiloxy) silane crosslinking reagent; and
- 2-[5-chloro-2H-benzotriazol-2-yl]-611,1-dimethylethyl]-4-[2-propenyloxypropyl]phenol hydrosilylated with tetrakis(dimethylsiloxy)silane.
- 12. An elastomeric, optically clear, high refractive index lens having superior postfolding optical resolution recovery, said lens comprising a polyorganosiloxane obtained by curing the curable, high refractive index, polyorganosiloxane composition of claim 11.
- 13. The high refractive index, curable polyorganosiloxane composition of claim 11 wherein said fumed silica filler has an average particle diameter of from about 7 nanometers to about 11 nanometers.
- 14. The high refractive index, curable polyorganosiloxane composition of claim 11 wherein said fumed silica is surface treated with a member selected from the group consisting of hexamethyldisilazane and 1,3-divinyltetramethyldisilazane.
- 15. A high refractive index, curable polyorganosiloxane composition useful for fabricating intraocular lenses, said composition comprising:
- about 42 wt. % to about 48 wt. % of a first vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said first vinyl terminated copolymer resin having about 82 mole % to about 88 mole % dimethylsiloxane and about 12 mole % to about 18 mole % diphenylsiloxane, said first vinyl terminated copolymer resin having a molecular weight sufficient to provide a first vinyl terminated copolymer resin viscosity of about 400 cps to about 1000 cps, and
- about 52 wt. % to about 58 wt. % of a second vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said second vinyl terminated copolymer resin having about 82 mole % to about 88 mole % dimethylsiloxane and about 12 mole % to about 18 mole % diphenylsiloxane, said second vinyl terminated copolymer resin having a molecular weight sufficient to provide a second vinyl terminated copolymer resin viscosity of about 4400 cps to about 5400 cps;
- about 8 to about 25 parts of fumed silica filler per hundred parts resin;
- tetrakis(dimethylsiloxy) silane crosslinking reagent; and
- 2-[5-chloro-2H-benzotriazol-2-yl]-6[1,1-dimethylethyl]-4-[2-propenyloxypropyl]phenol hydrosilylated with a terpolymer of dimethylsiloxane, diphenylsiloxane, and methylhydrosiloxane.
- 16. An elastomeric, optically clear, high refractive index lens having superior postfolding optical resolution recovery, said lens comprising a polyorganosiloxane obtained by curing the curable, high refractive index, polyorganosiloxane composition of claim 15.
- 17. The high refractive index, curable polyorganosiloxane composition of claim 15 wherein said fumed silica filler has an average particle diameter of from about 7 nanometers to about 11 nanometers.
- 18. The high refractive index, curable polyorganosiloxane composition of claim 15 wherein said fumed silica is surface treated with a member selected from the group consisting of hexamethyldisilazane and 1,3-divinyltetramethyldisilazane.
- 19. A high refractive index, curable polyorganosiloxane composition useful for fabricating intraocular lenses, said composition consisting essentially of:
- about 42 wt. % to about 48 wt. % of a first vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said first vinyl terminated copolymer resin having about 82 mole % to about 88 mole % dimethylsiloxane and about 12 mole % to about 18 mole % diphenylsiloxane, said first vinyl terminated copolymer resin having a molecular weight sufficient to provide a first vinyl terminated copolymer resin viscosity of about 400 cps to about 1000 cps, and
- about 52 wt. % to about 58 wt. % of a second vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said second vinyl terminated copolymer resin having about 82 mole % to about 88 mole % dimethylsiloxane and about 12 mole % to about 18 mole % diphenylsiloxane, said second vinyl terminated copolymer resin having a molecular weight sufficient to provide a second vinyl terminated copolymer resin viscosity of about 4400 cps to about 5400 cps;
- about 11 to about 14 parts of fumed silica filler per hundred parts resin;
- about 5 to about 50 parts of platinum containing catalyst per million parts resin;
- about 1.5 to about 5 parts of tetrakis(dimethylsiloxy) silane crosslinking reagent per hundred parts resin; and
- about 0.1 to about 2 parts of 2-[5-chloro-2H-benzotriazol-2-yl]-6-[1,1-dimethylethyl]-4-[2-propenyloxypropyl]phenol ultraviolet absorbing compound hydrosilylated with tetrakis(dimethylsiloxy) silane.
- 20. An elastomeric, optically clear, high refractive index lens having superior postfolding optical resolution recovery, said lens comprising a polyorganosiloxane obtained
- by curing the curable, high refractive index, polyorganosiloxane composition of claim 19.
- 21. A high refractive index, curable polyorganosiloxane composition useful for fabricating intraocular lenses, said composition consisting essentially of:
- about 42 wt. % to about 48 wt. % of a first vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said first vinyl terminated copolymer resin having about 82 mole % to about 88 mole % dimethylsiloxane and about 12 mole % to about 18 mole % diphenylsiloxane, said first vinyl terminated copolymer resin having a molecular weight sufficient to provide a first vinyl terminated copolymer resin viscosity of about 400 cps to about 1000 cps, and
- about 52 wt. % to about 58 wt. % of a second vinyl terminated copolymer resin based on the total amount of the first and second vinyl terminated copolymer resins, said second vinyl terminated copolymer resin having about 82 mole % to about 88 mole % dimethylsiloxane and about 12 mole % to about 18 mole % diphenylsiloxane, said second vinyl terminated copolymer resin having a molecular weight sufficient to provide a second vinyl terminated copolymer resin viscosity of about 4400 cps to about 5400 cps;
- about 11 to about 14 parts of fumed silica filler per hundred parts resin;
- about 5 to about 50 parts of platinum containing catalyst per million parts resin;
- about 1.5 to about 5 parts of tetrakis(dimethylsiloxy)silane crosslinking reagent per hundred parts resin; and
- about 0.1 to about 2 parts of 2-[5-chloro-2H-benzotriazol-2-yl]-6-[1,1-dimethylethyl]-4-[2-propenyloxypropyl]phenol ultraviolet absorbing compound hydrosilylated with a terpolymer of dimethylsiloxane, diphenylsiloxane, and methylhydrosiloxane.
- 22. An elastomeric, optically clear, high refractive index lens having superior postfolding optical resolution recovery, said lens comprising a polyorganosiloxane
- obtained by curing the curable, high refractive index, polyorganosiloxane composition of claim 21.
Parent Case Info
This is a continuation in part of application Ser. No. 07/871,335, filed Apr. 21, 1992, now abandoned.
US Referenced Citations (17)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0293560 |
Dec 1988 |
EPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
871335 |
Apr 1992 |
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