Fluorine containing soft contact lens hydrogels
OwnerJoseph C. Salamoneinventor
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Abstract
An improved soft contact lens material, existing as a hydrogel, is formed by a polymer containing a fluorinated monomer, a hydroxyalkyl ester of acrylic or methacrylic acid, and an N-vinyl lactam. The polymer may also contain other hydrophilic and/or hard hydrophobic monomers, crosslinking agents, and uv-absorbing agents. Contact lenses made of these combinations have high water of hydrations, are highly wettable, have extremely high oxygen permeabilities and are resistant to protein deposits and other forms of attached debris.
Claims28
A clear hydrogel lens polymeric material having good surface resistance, high tensile and tear strength, high oxygen permeability, good optical clarity and consisting essentially of the free radical polymerization product of (a) about 7 to about 25.0 parts by weight of a fluorine-containing monomer, (b) about 2.5 to about 81.0 parts by weight of a material selected from the group consisting of mono- or di-hydroxyalkyl or alkylene oxide acrylates or methacrylates, (c) about 10 to about 50.0 parts by weight of an N-vinyl lactam, and (d) about 5 to about 35.4 percent by weight of added unsaturated sulfonic acid monomers or salts thereof,
- said product having a Dk value of from at least 35 at 35.degree. C. and a wet water of hydration of at least 30 percent.
An optically clear hydrophilic lens having good surface resistance, high tensile and tear strength, high oxygen permeability, good optical clarity and consisting essentially of the free radical polymerization product of (a) about 7 to about 25.0 parts by weight of a fluorine-containing monomer, (b) about 2.5 to about 81.0 parts by weight of a material selected from the group consisting of mono- or di-hydroxyalkyl or alkylene oxide, acrylates or methacrylates, (c) about 10 to about 50 parts by weight of an N-vinyl lactam, and (d) about 5 to about 35.4 percent by weight of added unsaturated sulfonic acid or salts thereof,
- said product having a Dk value of at least 35 at 35.degree. C. and a wet water of hydration of at least 30 percent.
Dependencies are inferred from the claim text.