Olefinically unsaturated polyisocyanates

US6111053A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Martin Brahm · Siegen, DE
• Eberhard Arning · Kaarst, DE
• Lutz Schmalstieg · Neunburg vorm Wald, DE
• Harald Mertes · Neunburg vorm Wald, DE
• Jurgen Schwindt · Leverkusen, DE

Key dates

• Filing date: May 8, 1995
• Grant date: Aug 29, 2000
• Expiry date: May 8, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/7837
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to olefinically unsaturated polyisocyanates containing allophanate groups and having an NCO content of 6 to 20% by weight, an iodine value of 15 to 150, a content of hydrocarbon chains containing 12 to 30 carbon atoms of 100 to 700 mg/g and a content of allophanate groups of 10 to 300 mg/g, to a process for their production by reaction of a polyisocyanate component containing urethane groups with excess polyisocyanates, and to a one-component coating composition containing these olefinically unsaturated polyisocyanates as binders.