Dendritic and highly branched polyurethanes

US6376637B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Bernd Bruchmann · Ludwigshafen, DE
• Ulrike Ehe · Lambsheim, DE
• Frank Wingerter · Ludwigshafen, DE
• Konrad Stiefenhöfer · Ebertsheim, DE
• Ulrich Treuling · Bensheim, DE

Key dates

• Filing date: Jan 26, 2000
• Grant date: Apr 23, 2002
• Expiry date: Jan 26, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G83/002
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for preparing dendritic or highly branched polyurethanes by reacting diisocyanates and/or polyisocyanates with compounds containing at least two groups which are reactive toward isocyanates, at least one of the reactants contains functional groups having a different reactivity compared to the other reactant and the reaction conditions are selected so that only certain reactive groups react with one another in each reaction step.