Silicone resin optical devices

US4198131A · kind A · utility

Assignee

• Dow Corning Corporation · US

Inventors

• Arthur A. Birdsall · Midland, US
• John Fitzgerald · San Jose, US
• David Jones · Midland, US
• Keith E. Polmanteer · Midland, US

Key dates

• Filing date: May 15, 1978
• Grant date: Apr 15, 1980
• Expiry date: May 15, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/043
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Optical devices such as corneal, scleral and interocular lenses are made from phenyl-containing siloxane resins. They combine a high degree of oxygen transmission with ease of fabrication inherent to hard materials, thereby providing increased wearer comfort and ease of fabrication. A typical resin is a copolymer of phenyl, vinyl and methyl siloxanes having at least about 0.2 phenyl groups per silicon.