Basf Aktiengesellschaft

Basfaktiengesellschaft

Basf Se Corporation

Gottfried Knorr

Holger Seifert

Udo Rotermund

Renate Hempel

Stefan Dinsch

Peter Horn

Eva Baum

Werner Hinz

Michael Reichelt

Werner Wiegmann

Bernd Guettes

Georg Knoblauch

Falko Ramsteiner

Peter Von Malotki

J&uuml;rgen Winkler

Gerd H&ouml;ppner

Peter Malotki

Polyetherols based on solid initiator substances and liquid, hydroxyl-containing coinitiators are prepared by a catalyzed addition reaction of alkylene oxides by a process in which the initiator combination contains diols carrying ethoxy structures, the ratio of the average number of hydroxyl groups per mole of initiator combination to the number of ethoxy structures in the polyetherol being from 1:0.2 to 1:1.8 and the ratio of the amounts by weight of the diols carrying ethoxy structures to the average molecular weight of the polyetherol being from 1:2 to 1:15. The polyetherols prepared by this process are used for the preparation of PUR, in particular, rigid PUR foams.

Preparation of polyetherols

Polyurethanes having improved curing are prepared by reacting

Preparation of polyurethanes having improved curing

A process for producing rigid polyurethane foams with reduced density by reacting

Production of rigid polyurethanes foams with reduced density

In a process for producing rigid foams based on isocyanate, the blowing agent used is a mixture of at least one low-boiling hydrocarbon having from 3 to 7 carbon atoms, low molecular weight monohydric alcohols containing primary or secondary hydroxyl groups and having from 1 to 4 carbon atoms, and, if desired, the carbon dioxide formed from water and isocyanate. The rigid foams can be used as insulation material.

Production of rigid foams based on isocyanate

The invention relates to transparent, autoclavable, non-cytotoxic, essentially compact polyurethane embedding compositions which are prepared by reacting

Transparent, autoclavable, non-cytotoxic, essentially compact

Growing community of inventors

Schwarzheide, Germany

Gottfried Knorr