Polysiloxane/acrylic acid/polcyclic esters of methacrylic acid polymer contact lens
First Claim
1. A soft, hydrophilic, water absorbing, flexible, fillerless, hydrolytically stable, biologically inert contact lens with the capability of transporting oxygen sufficiently to meet the requirements of the human cornea made from a polymer comprising polymerizing a polysiloxane monomer α
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terminally bonded through divalent hydrocarbon groups to polymerizable, free radical polymerizably activated, unsaturated groups with from 1.0 weight percent to about 30.0 weight percent based on the total weight of the polymer of acrylic acid and 5.0 weight percent of about 50.0 weight percent based on the total weight of the polymer of a material selected from the group of a polycyclic ester of acrylic acid and a polycyclic ester of methacrylic acid forming a polymer in a crosslinked network, said polymer capable upon saturation with water of retaining from about 1 percent by weight to about 99 percent by weight, based on the total weight of the dry polymer, of water.
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Abstract
Monomeric polysiloxanes end-capped with activated unsaturated groups polymerized with acrylic acid and a comonomer comprising a polycyclic ester of acrylic acid or methacrylic acid to form a hydrophilic, water absorbing contact lens is disclosed. These polysiloxane polymer contact lenses are unexpectedly capable upon hydration of retaining from 1 percent to about 99 percent by weight of water, based upon the total weight of the dry, i.e., unhydrated polymer.
249 Citations
31 Claims
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1. A soft, hydrophilic, water absorbing, flexible, fillerless, hydrolytically stable, biologically inert contact lens with the capability of transporting oxygen sufficiently to meet the requirements of the human cornea made from a polymer comprising polymerizing a polysiloxane monomer α
- ,ω
terminally bonded through divalent hydrocarbon groups to polymerizable, free radical polymerizably activated, unsaturated groups with from 1.0 weight percent to about 30.0 weight percent based on the total weight of the polymer of acrylic acid and 5.0 weight percent of about 50.0 weight percent based on the total weight of the polymer of a material selected from the group of a polycyclic ester of acrylic acid and a polycyclic ester of methacrylic acid forming a polymer in a crosslinked network, said polymer capable upon saturation with water of retaining from about 1 percent by weight to about 99 percent by weight, based on the total weight of the dry polymer, of water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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16. The contact lens according to claim 16 wherein the alkylene radical has from about 3 to about 4 carbon atoms.
Specification