Perfluoroalkylether macromer having two polymerizable groups

US5962611A · kind A · utility

Assignees

• Novartis AG · CH
• COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION · AU

Inventors

• Gordon Francis Meijs · Melbourne, AU
• Bronwyn Glenice Laycock · Melbourne, AU
• Madeleine Clare Griffiths · Hornsby, AU
• Edith Cheong · Merang, MY

Key dates

• Filing date: Jan 26, 1998
• Grant date: Oct 5, 1999
• Expiry date: Jan 26, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/8116
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A macromer of formula (I) is described: Q-(PFPE-L).sub.n-1 -PFPE-Q, wherein n>1.0; PFPE may be the same or different and is a perfluorinated polyether of formula (II): --OCH.sub.2 CF.sub.2 O(CF.sub.2 CF.sub.2 O).sub.x (CF.sub.2 O).sub.y CF.sub.2 CH.sub.2 O--, wherein the CF.sub.2 CF.sub.2 O and CF.sub.2 O units may be randomly distributed or distributed as blocks throughout the chain and wherein x and y may be the same or different such that the molecular weight of the PFPE is in the range of from 242 to 4,000; L is a difunctional linking group; and Q may be the same or different and is a polymerizable group. The macromer may be used preferably in the production of contact lenses.