Covestro Deutschland Ag

Bayer Materialscience Ag

Covestro Intellectual Property Gmbh & Co. Kg

Recticel Engineered Foams Belgium

Torsten Heinemann

Reinhard Albers

Hartmut Nefzger

Erika Bauer

Rolf William Albach

Ulrich Liman

Torsten Hagen

Hans-Detlef Arntz

Jens Langanke

Rolf Roers

Stephan Schleiermacher

Michael Loof

Johannes Van De Braak

Stephanie Vogel

Frank Otto

Nicole Welsch

Jürgen Schloβmacher

Sascha Froebel

Stephan Moers

Dirk Steinmeister

Patrick Klasen

Matthias Leven

Joke De Geeter

Jan Willems

Isabel Verlent

Dieter Seidel

Zhihong Gu

Maria Dolors Mateu

Atsushi Urano

Walter Klän

Suk Sangjo

Franz Siegl

Robert Grimm

Zhao Shihu

Katharina Ander

Thomas Heidelmann

Norah Heinz

Rolf Albach

Atsushi Uranu

Urano Atsushi

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 flame-proofed polyurethane hard foam material or polyurethane/polyisocyanurate hard foam material (designated below individually or jointly also as 'PUR/PIR hard foam material') comprising phosphinates (also hypophosphite), and to a method for producing PUR/PIR hard foam materials through the implementation of a reaction mixture containing A1 an isocyanate-reactive component, A2 propellant, A3 catalyst, A4 optionally additive, A5 flame-proofing agent, B an isocyanate component, characterised in that the flame-proofing agent A5 contains a phosphine according to the formula (I)M[(R)PO], where R=in each case stands for H, C1- to C4-(hydroxy-)alkyl group or benzyl group, M=an element of the main groups 1 to 3, wherein hydrogen is excepted, and n=the number of the main group of M, and the proportion of the phosphine according to the formula (I) is 0.1 to 15 wt %, based on the total mass of components A1 to A5.

Phosphinate as flame-proofing additive for PUR/PIR hard foam material

The present invention is related to a method for the production of polyurethane foam, comprising the steps of:

Vacuum-supported method for the production of polyurethane foam

The present invention relates to a process for producing a rigid polyurethane-polyisocyanurate foam C, comprising the step of reacting (i) an isocyanate-terminated prepolymer B with (ii) an activator component A comprising at least one trimerization catalyst A1 and at least one blowing agent A3 in a reaction mixture to form a foam, characterized in that&#x2014;there is used an isocyanate-terminated prepolymer B obtained from a reaction of an isocyanate B1 having a mean isocyanate functionality of from &#x2267;2.3 to &#x2266;2.9 with a polyol component B2, and&#x2014;the activator component A comprises water as the blowing agent A3 in an amount of from &#x2267;5 wt. % to &#x2266;50 wt. %,&#x2014;the isocyanate index in the reaction mixture is in a range of from &#x2267;400 to &#x2267;500, and&#x2014;the isocyanate content of the prepolymer B is in a range of from &#x2267;21 wt. % to &#x2266;30 wt. %, based on the total mass of the prepolymer B, and&#x2014;wherein in the reaction of the prepolymer B and the activator component A a conversion contribution to polyisocyanurate of &#x2266;75% is achieved. Rigid foams C so produced have good flame retarding properties while at the same time having good insulating properties and stability properties. The present invention relates further to a rigid polyisocyanurate foam C produced by the process according to the invention, to the use of such a rigid polyisocyanurate foam C in the production of heat-insulating structural components, and to a heat-insulating structural component comprising such a rigid polyurethane-polyisocyanurate foam.

Method for producing a hard polyurethane-polyisocyanurate foamed material

A polyurethane/polyisocyanurate foam is obtainable from the reaction of A) a polyol component comprising A1) an aromatic polyester polyol, A2) a polyether polyol started on a carbohydrate polyol and A3) a polyether polyol started on ethylene glycol, wherein the total hydroxyl number of the polyol component A) is from &#x2267;150 mg KOH/g to &#x2266;300 mg KOH/g; with B) a polyisocyanate component, wherein the equivalent ratio of NCO groups to the sum of the hydrogen atoms reactive towards NCO groups is from &#x2267;110:100 to &#x2266;200:100. This foam has improved adhesion properties to facings and is suitable for the production of composite elements without requiring the use of an additional adhesion promoter.

Polyurethane/polyisocyanurate foam having improved adhesion properties

Polyester polyols are produced from at least one carboxylic acid hydride and diethylene glycol by a process in which the formation of 1,4-dioxane is suppressed. These polyester polyols are useful for producing polyurethane (PUR) and polyisocyanurate (PIR) foams and metal composite elements containing these PUR or PIR foams.

Method for producing polyester polyols having low amounts of dioxane waste

The invention relates to a process for the production of water-blown, finely cellular rigid foams containing urethane groups and/or isocyanurate groups by the reaction of polyisocyanates with a polyol component in the form of an emulsion. The invention also relates to open-cell polyurethane foams which are foamable in the mould.

Fine cell, water-blown rigid polyurethane foams

Growing community of inventors

Leichlingen, Germany

Torsten Heinemann