MULTIFUNCTIONAL CROSSLINKING AGENTS AND OPHTHALMIC DEVICES FORMED THEREFROM

• Main Authors: Russell, Jade J, Mis, Mark R, Shih, Feng-Yang, Vatankhah Varnosfaderani, Mohammad, DiBella, JR., James Anthony, Awasthi, Alok Kumar
• Format: Patent
• Language: English
• Published: 03.08.2023
• Subjects: CONTACT LENSES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES

A multifunctional crosslinking agent includes one or more repeating units of a siloxanyl group or a silyl-alkyl-siloxanyl group, and at least two ethylenically unsaturated reactive end groups. One of the at least two ethylenically unsaturated reactive end groups is a (meth)acrylate-containing reactive end group or an acrylamide-containing reactive end group and the other one is an allyl-containing reactive end group or a vinyl-containing reactive end group. Ophthalmic devices are formed from a polymerization product of a monomeric mixture containing one or more of the multifunctional crosslinking agents, one or more first ophthalmic device-forming comonomers having at least one reactive group that preferentially reacts with the (meth)acrylate-containing reactive end group or the acrylamide-containing reactive end group of the multifunctional crosslinking agent, and one or more second ophthalmic device-forming comonomers having at least one reactive group that preferentially reacts with the allyl-containing reactive end group or the vinyl-containing reactive end group of the multifunctional crosslinking agent.