| US 7,354,959 B2 | ||
| Water-based inks for hydrogel lenses | ||
| Robert C. Tucker, Suwanee, Ga. (US); Sandra Corti, Suwanee, Ga. (US); and Joshua Wallach, Portsmouth, Va. (US) | ||
| Assigned to Novartis AG, Basel (Switzerland) | ||
| Filed on Oct. 12, 2005, as Appl. No. 11/248,548. | ||
| Application 11/248548 is a continuation of application No. PCT/EP2005/008159, filed on Jul. 27, 2005. | ||
| Claims priority of provisional application 60/591704, filed on Jul. 30, 2004. | ||
| Prior Publication US 2007/0027228 A1, Feb. 01, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C08F 2/46 (2006.01) | ||
| U.S. Cl. 522—84 [522/86; 522/90; 522/96; 522/71; 522/74; 522/150; 522/151; 522/152; 523/160; 523/105; 523/106; 351/160] | 18 Claims |
| 1. An ink for making colored contact lenses, comprising:
water;
at least one colorant; and
a water-soluble and actinically-curable binder polymer which is a vinyl group-terminated polyurethane polymer, a vinyl group-terminated
polyurea binder polymer, or a mixture thereof,
wherein the vinyl group-terminated polyurethane polymer is a reaction product of:
an isocyanate-capped polyurethane with an ethylenically unsaturated amine (primary or secondary amine) or an ethylenically
unsaturated monohydroxy compound, or
a hydroxy-capped polyurethane with an isocyanate-containing acrylate or methacrylate,
wherein the isocyanate-capped or hydroxy-capped polyurethane is a copolymerization product of a reactive mixture comprising
at least one polyalkyleneglycol and at least one diisocyanate,
wherein the vinyl group-terminated polyurea polymer is obtained
by reacting an acryloylchloride or an isocyanate group-containing acrylate or methacrylate with an amine-capped polyurea,
or
by reacting an ethylenically unsaturated amine (primary or secondary) or an ethylenically unsaturated monohydroxy organic
compound with an isocyanate-capped polyurea,
wherein the amine- or isocyanate-capped polyurea is a copolymerization product of a reactive mixture comprising at least one
poly(oxyalkylene)diamine and at least one diisocyanate, and
wherein the ink is characterized by having a viscosity greater than 50 centipoise (cps), a prolonged stability of at least
8 hours, and a good adhesion to a HEMA-based hydrogel contact lens.
|