Contact lens made from polymers of polysiloxane and polycyclic esters of acrylic acid or methacrylic acid
First Claim
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1. A soft, flexible, fillerless, hydrolytically stable, biologically inert, transparent contact lens with the capability of transporting oxygen sufficiently to meet the requirements of the human cornea comprising a polysiloxane monomer, α
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terminally bonded through divalent hydrocarbon groups to polymerized, free radical polymerizably activated, unsaturated groups copolymerized with from about 20 percent by weight to about 80 percent by weight, based on the total weight of the solution, of a monomer selected from the group consisting of a polycyclic ester of acrylic acid and a polycyclic ester of methacrylic acid, forming a polymer in a crosslinked network having a tensile modulus of elasticity of at least about 200 g/mm2 with a tear strength of at least about 5.0 g/mm thickness.
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Abstract
Monomeric polysiloxanes end-capped with activated unsaturated groups polymerized with a comonomer comprising a polycyclic ester of acrylic acid or methacrylic acid to form a soft contact lens is disclosed. These instant polysiloxane copolymer contact lenses have unexpectedly high tear strengths and unexpectedly high modulus of elasticity.
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31 Claims
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1. A soft, flexible, fillerless, hydrolytically stable, biologically inert, transparent contact lens with the capability of transporting oxygen sufficiently to meet the requirements of the human cornea comprising a polysiloxane monomer, α
- ,ω
terminally bonded through divalent hydrocarbon groups to polymerized, free radical polymerizably activated, unsaturated groups copolymerized with from about 20 percent by weight to about 80 percent by weight, based on the total weight of the solution, of a monomer selected from the group consisting of a polycyclic ester of acrylic acid and a polycyclic ester of methacrylic acid, forming a polymer in a crosslinked network having a tensile modulus of elasticity of at least about 200 g/mm2 with a tear strength of at least about 5.0 g/mm thickness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification