Contact lenses made with HEMA-compatible polysiloxane macromers

US9322959B2 · kind B2 · utility

Assignee

• COOPERVISION INTERNATIONAL LIMITED · GB

Inventors

• Hiroyuki Ueyama · Nobeoka, JP
• Charlie Chen · San Ramon, US
• Yuan Xu · Fremont, US
• Yuwen Liu · Dublin, US
• Ying Zheng · Suwanee, US
• Paul Richardson · San Ramon, US
• Prasad Dande · Oakland, US

Key dates

• Filing date: Aug 27, 2013
• Grant date: Apr 26, 2016
• Expiry date: Aug 27, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/442
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Optically clear silicone hydrogel contact lenses are described that comprise a polymeric lens body that is the reaction product of a polymerizable composition comprising at least 25 wt. % of at least one hydroxyalkyl methacrylate; and at least 20 wt. % of at least one HEMA-compatible bifunctional polysiloxane comprising at least 6 siloxane groups and having an HLB value of at least 5 and/or a hydroxyl group content of at least 1 wt. %.