Preparation of polyisocyanate polyaddition products

US6329440A · kind A · utility

Assignee

• BASF SE

Inventors

• Dietrich Scherzer · Neustadt, DE
• Ulrich Treuling · Bensheim, DE
• Martin Kreyenschmidt · Löhne, DE
• Anton Kappes · Olching, DE
• Klaus Pittrich · Herrsching am Ammersee, DE

Key dates

• Filing date: May 6, 1999
• Grant date: Dec 11, 2001
• Expiry date: May 6, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for preparing polyisocyanate polyaddition products by reacting isocyanates with compounds which are reactive toward isocyanates, in the presence or absence of blowing agents, catalysts, auxiliaries and/or additives, the reaction is carried out in the presence of (i) particles which have a size of <200 .mu.m and a melting point in a range from 50 to 300.degree. C., or in the presence of thermoset particles (ii) or in the presence of particles (i) and (ii).