Composition for forming a contact lens

US8618187B2 · kind B2 · utility

Assignee

• Novartis AG · CH

Inventors

• Bernhard Seiferling · Goldbach, DE
• Thomas Schmidt · Thierhaupten, DE
• Jurgen Vogt · Fribourg, CH

Key dates

• Filing date: Mar 29, 2012
• Grant date: Dec 31, 2013
• Expiry date: Mar 29, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F20/56
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

There is described a composition for forming an contact lens, in particular for forming a silicone hydrogel contact lens, comprising at least one first vinylic monomer or macromer having one first ethylenically unsaturated group and at least one second vinylic monomer or macromer having one second ethylenically unsaturated group, wherein the first and second ethylenically unsaturated groups are different from each other and wherein the composition further comprises a crosslinker with at least two ethylenically unsaturated (polymerizable) groups with a selected kinetic copolymerization parameter r1 of less than 1.0 relative to one of the first and second ethylenically unsaturated (polymerizable) groups as defined above.