Hydrogels based on aliphatic NCO prepolymers

US8133509B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Burkhard Kohler · Leverkusen, DE
• Michael Mager · Leverkusen, DE
• Stefanie Eiden · Leverkusen, DE
• Johan Kijlstra · Odenthal, DE

Key dates

• Filing date: Oct 24, 2007
• Grant date: Mar 13, 2012
• Expiry date: Dec 21, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2210/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention concerns novel hydrogels, a process for the preparation of these hydrogels and would contact materials comprising these hydrogels. These polyurethane hydrogels are obtained by the reaction of aliphatic isocyanate prepolymers with polyols comprising tertiary nitrogen in water.