Reactive dyes and lenses utilizing the same
AssigneeHoya Corporation
InventorsSuguru Imafuku, Soichiro Motono, Hidetoshi Iwamoto
Life of this patent
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Abstract
A compound represented by the following formula 1: ##STR1## wherein R.sub.1 is an unsubstituted or substituted benzyl group or unsubstituted or substituted phenyl group, method for producing a copolymer comprising copolymerizing a monomer mixture containing the compound, copolymer for lenses containing a copolymerized component represented by the following formula 2 ##STR2## and a lens consisting of the copolymer. The compound of the formula 1 is a reactive dye exhibiting excellent hydrolysis resistance, good copolymerizability with other comonomers, excellent dyeing property and proper solubility in comonomers.
Claims8
A soft contact lens comprising a copolymer produced by copolymerizing a monomer mixture comprising a compound of formula 1:
- ##STR11## wherein R.sub.1 is an unsubstituted or substituted benzyl group or unsubstituted or substituted phenyl group;
- wherein the substituent(s) of the substituted benzyl group are one or more groups selected from the group consisting of a vinyl group, a C1-C6 alkyl group, a C1-C6 alkoxy group, hydroxyl group and a halogen atom;
- and wherein the substituent(s) of the substituted phenyl group are on or more groups selected from the group consisting of a C1-C6 alkyl group, an C1-C6 alkoxy group, a hydroxyl group and a halogen atom.
A lens comprising a copolymer produced by copolymerizing a monomer mixture comprising
- (a) a compound of formula 1:
- ##STR12## wherein R.sub.1 is a 4-monosubstituted benzyl group or 4-monosubstituted phenyl group;
- wherein the substituent(s) of the substituted benzyl group are one or more groups selected from the group consisting of a vinyl group, a C1-C6 alkyl group, a C1-C6 alkoxy group, hydroxyl group and a halogen atom;
- and wherein the substituent(s) of the substituted phenyl group are on or more groups selected from the group consisting of a C1-C6 alkyl group, an C1-C6 alkoxy group, a hydroxyl group and a halogen atom;
- and
- (b) one or more monomers selected from the group consisting of alkyl (meth)acrylates, hydrophilic monomers, silicon-containing monomers and fluorine-containing monomers.
Dependencies are inferred from the claim text.