Compact, transparent polyisocyanate polyaddition products

US6204325A · kind A · utility

Assignee

• BASF SE

Inventors

• Christian Maletzko · Altrip, DE
• Edwin Baumann · Schifferstadt, DE
• Ilka Beuermann · Pulheim, DE
• Peter Roche · Grafing, DE
• Ulrich Treuling · Bensheim, DE
• Hans Frei · Jona, CH

Key dates

• Filing date: Mar 10, 1999
• Grant date: Mar 20, 2001
• Expiry date: Mar 10, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/755
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Compact, transparent polyisocyanate polyaddition products are produced in a process by reacting (a) isocyanates with (b) compounds reactive to isocyanates, if desired in the presence of (c) catalysts and (d) auxiliaries and/or additives, which comprises using as (b) compounds reactive to isocyanates a mixture (i) which has an average functionality of >3 and an average hydroxyl number of from 300 to 950 mg KOH/g.