Graft copolymer, solution containing the graft copolymer for treating contact lens, and method of treating contact lens with the solution and making hydrophilic lens surface
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United States of America Patent
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Apr 27, 1993
Grant Date -
N/A
app pub date -
Dec 14, 1990
filing date -
Dec 19, 1989
priority date (Note) -
Expired
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Abstract
A graft copolymer produced by polymerizing 2-hydroxyethyl methacrylate, or monomer mixture containing the monomer, by using initiator produced by copolymerizing (A) N-vinyllactam or styrene and (B) peroxy-fumarate or combination of the peroxy-fumarate and diester of fumaric acid, the peroxy-fumarate being represented by the formula (I): ##STR1## wherein R1 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 18 carbon atoms, or an aromatic hydrocarbon group containing 6 to carbon atoms; and R2 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 13 carbon atoms, or a phenyl group. A solution for treating a contact lens, including the above graft copolymer and a solvent dissolving the copolymer. A method of treating a contact lens, comprising the step of wetting a surface of the contact lens with the above solution, and the step of contacting the wetted surface with a poor solvent, thereby modifying the hydrophobic contact lens surface into a hydrophilic surface.
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