Contact lenses made with HEMA-compatible polysiloxane macromers

US9574038B2 · 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
• Hong Xue · Sha Tin, CN

Key dates

• Filing date: Feb 25, 2015
• Grant date: Feb 21, 2017
• Expiry date: Feb 25, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/281
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

HEMA-compatible siloxane monomers are described that can be used to manufacture contact lenses that combine the attributes of HEMA-based contact lenses with the high oxygen permeability of silicone hydrogel lenses. Optically clear silicone hydrogel contact lens can be manufactured that comprise a polymeric lens body that is the reaction product of a polymerizable composition comprising: a) at least 25 wt. % of at least one hydroxyalkyl methacrylate; and b) at least 20 wt. % of at least one HEMA-compatible polysiloxane.