Covestro Intellectual Property Gmbh & Co. Kg

Covestro Deutschland Ag

Recticel Engineered Foams Belgium

Sascha Froebel

Jörg Hofmann

Klaus Lorenz

Joerg Hofmann

Torsten Heinemann

Marina Reithmeier

Philipp Sander

Elisabeth Vogelsang

Dirk Bruening

Benedikt Kilian

Isabel Verlent

Franz Siegl

Robert Grimm

Katharina Ander

Joke De Geeter

Bolko Raffel

Jan Willems

The invention relates to a method for producing a polyoxyalkylene polyester polyol by reacting a polyoxyalkylene polyol with a lactone in the presence of a Brønsted acid catalyst, wherein the catalyst has a pKa value of 1 or less; the number-average molar mass of the polyoxyalkylene polyol is ≥1000 g/mol, preferably ≥1500 g/mol, particularly preferably ≥2000 g/mol; and in the lactone a CH2 group is bonded to the ring oxygen. The invention further relates to polyoxyalkylene polyester polyols obtainable using the method according to the invention, and to a method for producing polyurethanes by reacting the polyoxyalkylene polyester polyols according to the invention with polyisocyanates.

Method for producing a polyoxyalkylene polyester polyol

The invention relates to a method for separating waste polyurethane foams, wherein for each polyurethane sample () of a supply stream () comprising polyurethane samples () from waste at least one respective spectrum () is recorded, wherein the at least one respective spectrum () is recorded by near-infrared spectroscopy, wherein each polyurethane sample () of the supply stream () is classified by a classification algorithm (), which classification algorithm () is based on machine learning, based on the respective at least one spectrum () into a respective class (-) of at least two classes (-), wherein the supply stream () comprising polyurethane samples () is separated into at least two streams (-) according to the classification into the respective class (-) and wherein each class (-) corresponds to a type of polyurethane. The invention also relates to a system for separating waste polyurethane foams.

Method and system for separating waste polyurethane foams

The invention relates to a pultrusion method for producing fiber-reinforced plastics, to carrying said method out by computer-assisted simulation and to a suitable underlying thermodynamic model.

Method for producing fiber-reinforced plastics

Growing community of inventors

Düsseldorf, Germany

Sascha Froebel