Process for rendering silicone rubber contact lenses hydrophilic

US4332922A · kind A · utility

Assignee

• Titmus Eurocon · DE

Inventors

• Gerhard Kossmehl · Berlin, DE
• Dietrich Quast · Berlin, DE
• Horst Schafer · Aschaffenburg, DE

Key dates

• Filing date: Jul 18, 1980
• Grant date: Jun 1, 1982
• Expiry date: Jul 18, 2000

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/043
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for rendering silicone rubber contact lenses hydrophilic by first reacting the silicone rubber with an oligomeric siloxane containing SiH groups in the presence of a catalyst and then subjecting the resulting equilibrated silicone rubber to a reaction with an aqueous base; or a silane addition reaction with a reactant containing C.dbd.C double bonds.