Ultraviolet absorbing polymers comprising 2-(2'-hydroxy-5'-acryloyloxyalkoxyphenyl)-2H-benzotriazole
AssigneeIolab Corporation
InventorsGary B. Dunks, Akira Yamada, Charles D. Beard, Namassivaya Doddi
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Abstract
Ultraviolet light absorbing compositions comprising 2-(2'-hydroxy-5'-acryloyloxyalkoxyphenyl(-2H-benzotrizoles, and copolymers thereof with one or more other monomers copolyermizable therewith, particularly acrylic monomers, are useful in the manufacture of ocular devices, particularly intraocular lenses and contact lenses.
Claims9
A compound of the formula ##STR12## wherein R.sub.1 is H, halogen or alkoxy of 1 to 3 carbon atoms, R.sub.2 is selected from the group consisting of H, CH.sub.3, and t-alkyl of 4 to 6 carbon atoms, and R.sub.3 is ##STR13## wherein R' is C.sub.2-10 alkylene which may be straight chain or branched, and R" is H, CH.sub.3 or CH.sub.2 X where X is halogen.
The compound 2-[2'-hydroxy-5'-(.beta.-methacryloyloxyethoxy)-3'-tert-butylphenyl]-5-met hoxy-2H-benzotriazole.
The compound 2-[2'-hydroxy-5'-(.gamma.-methacryloyloxypropoxy)-3'-tert-butylphenyl]-5-m ethoxy-2H-benzotriazole.
Dependencies are inferred from the claim text.