Hydrogels based on fluorine-containing and saccharide monomers

US5214452A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Gerhard Kossmehl · Berlin, DE
• Horst Schafer · Aschaffenburg, DE
• Norbert Klaus · Berlin, DE
• Jurgen Volkheimer · Hanau, DE
• Madjid Rezaii-Djafari · Berlin, DE

Key dates

• Filing date: Jul 17, 1992
• Grant date: May 25, 1993
• Expiry date: Jul 17, 2012

Classification

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

Abstract

The invention relates to a hydrogel which is a copolymer of a polymerizable monomer mixture which contains PA0 a) 2-85 mol-% of a hydrophobic vinyl monomer with at least three fluorine atoms, PA0 b) 2-80 mol-% of a hydrophobic polyhydroxy vinyl monomer whose hydroxyl groups are in protected form, PA0 c) 2-70 mol-% of a hydrophilic vinyl monomer and, PA0 d) based on the total amount of monomers a)-c), 0-5 mol-% of a crosslinker, in which hydrogel the hydroxyl groups of the segments formed by the monomers b) are in protected or in free form. These hydrogels can be used, for example, as contact lenses, intraocular lenses or in other areas of application where biologically tolerated materials are required.