Hydrophilic silicone rubber article and process for its preparation

US4920184A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Horst Schafer · Aschaffenburg, DE
• Gerhard Kossmehl · Berlin, DE
• Walter Neumann · Siegen, DE

Key dates

• Filing date: Aug 5, 1988
• Grant date: Apr 24, 1990
• Expiry date: Aug 5, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2383/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Hydrophilic silicone rubber article, the surface of which is hydrophilized partly or completely by reaction (equilibration reaction) with organosiloxanes, the organosiloxanes being synthesized by the reaction of SiH-group-containing siloxanes with allyl compounds which contain protected OH groups. These articles are particularly useful as contact lenses and intraocular lenses.