Patent ID: 9005700
Filing Date: 2015-04-14
Classification: B05D,B29D,G02B

Abstract:
1. A method for producing UV-absorbing contact lenses, comprising the steps of: obtaining an ophthalmic lens; dipping the ophthalmic lens in a coating solution, which comprises a first organic solvent and a UV-absorbing polymer dissolved in the first organic solvent, for a period of time sufficient to form a UV-absorbing coating on the ophthalmic lens, wherein the UV-absorbing polymer comprises UV-absorbing monomeric units and at least 50% by mole of carboxyl-containing monomeric units, wherein the UV-absorbing polymer is obtained by reacting a UV-absorbing compound with a precursor polymer having at least 50% by mole of carboxyl-containing monomeric units in a coupling reaction, wherein the UV-absorbing compound is represented by formula I, II, III, or IV in which R a divalent radical of —(R a O) n — in which R a is a linear or branched C 1 -C 12 -alkylene and n is from 1 to 10, in which R″ is H or C 1 -C 8 alkyl, E 1 and E 2 independently of each other are a covalent bond, a divalent radical of —(R a O) n — in which R a and n are defined above, in which R″ is H or C 1 -C 8 alkyl, a C 1 to C 12 linear or branched alkylene divalent radical, a cycloalkyl divalent radical with up to 40 carbon atoms, an alkylcycloalkyl divalent radical with up to 40 carbon atoms, an alkylaryl divalent radical with up to 40 carbon atoms, an arylalkylene divalent radical with up to 40 carbon atoms, or a dicarbonyl group having the formula —C(O)L 2 C(O)— in which L 2 is a C 1 to C 12 linear or branched alkylene divalent radical or —(R e1 —O) w1 —(R e2 —O) w2 —(R e3 —O) w3 —, wherein R e1 , R e2 , and R e3 independently of one another are a linear or branched C 1 -C 4 -alkylene and w1, w2 and w3 independently of one another are a number from 0 to 20 provided that the sum of (w1+w2+w3) is 1 to 60, and X b and X c independently of each other are a covalent bond, carbonyl, in which R″ is defined above; and Y and Y