Crosslinked tinted polymers

US5871675A · kind A · utility

Assignee

• Novartis AG · CH

Inventors

• Achim Müller · Aschaffenburg, DE
• Thomas Pohlmann · Niedernberg, DE
• Bernhard Seiferling · Goldbach, DE

Key dates

• Filing date: Sep 18, 1997
• Grant date: Feb 16, 1999
• Expiry date: Sep 18, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2810/50
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a novel process for the production of tinted mouldings, in particular tinted contact lenses, in which a crosslinkable tinted polymer comprising units containing a crosslinkable group and units containing a reactive dye radical is crosslinked in solution, and to tinted mouldings, in particular tinted contact lenses, obtainable by this process. The present invention likewise relates to novel crosslinkable tinted polymers comprising units containing a crosslinkable group and units containing a reactive dye radical which can be employed in the novel process, in particular derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000, to crosslinked tinted polymers, either homopolymers or copolymers, made from these novel crosslinkable tinted polymers containing a reactive dye radical, a process for the preparation of the novel crosslinkable tinted polymers comprising units containing a crosslinkable group and units containing a reactive dye radical and the homopolymers and copolymers obtainable therefrom, to tinted mouldings made from said homopolymers or copolymers, in particular tinted contact lenses made from these homopolymers or copol…