Modified silicone rubber and its use as a material for optical lenses and optical lenses made from this material

US4853453A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

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

Key dates

• Filing date: Dec 18, 1987
• Grant date: Aug 1, 1989
• Expiry date: Dec 18, 2007

Classification

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

Abstract

A modified silicone rubber with dimethylsiloxane and urethane units in the main chains, which are cross linked through methyl groups. This material is hydrophilic and suitable as a contact lens material.