Evonik Operations Gmbh

Evonik Goldschmidt Corporation

Evonik Degussa Gmbh

Rüdiger Landers

Wilfried Knott

Dagmar Windbiel

Daniela Hermann

Isabelle Denise Wessely

Philipp Tomuschat

Michael Ferenz

Horst Dudzik

Martin Glos

Jörn Kiwitt

Klaus-Dieter Klein

Roland Hubel

Matthias Naumann

Christian Eilbracht

Annegret Terheiden

Mladen Vidakovic

Jane Garrett Kniss

Kai-Oliver Feldmann

Harald Modro

Rainer Ziegler

Juergen Droese

Klaus Dieter Klein

Eva Emmrich

Robert Borgogelli

Kathie W Hogg

Shaped PU foam articles, preferably mattresses and/or cushions, wherein the polyurethane foam has been obtained by reaction of at least one polyol component and at least one isocyanate component in the presence of at least one compound of formula (1a) and at least one compound of formula (1b) and at least one blowing agent, are described.

Shaped PU foam articles

A method determines machine parameters of a foam production machine is provided. The foam production machine includes a mixing head configured to mix precursor reagents for forming a reactive mixture, a plurality of inclined fall plates, where a first inclined fall plate is configured to receive the reactive mixture, and where each inclined fall plate has vertically adjustable ends, and a conveyor configured to receive the reactive mixture from a last inclined fall plate, the conveyor having an adjustable conveyor speed. The method includes executing software by a computer system, including accessing a database for reading a rise profile for the reactive mixture of the precursor reagents and computing, based on the rise profile, vertical positions for the ends of each inclined fall plate and the conveyor speed resulting in a predefined predicted profile of the reactive mixture on the plurality of inclined fall plates.

System and method for determining parameters for foam production

A method sets machine parameters of a foam production machine. The foam production machine includes an intermediate conveyance unit configured to receive a reactive mixture, a plurality of fall plates having vertically adjustable ends and configured to receive the reactive mixture from the intermediate conveyance unit, and a conveyor configured to receive the reactive mixture from the fall plates. The method includes executing software by a computer system, where executing the software includes importing characteristics of the foam production machine and a rise profile for the reactive mixture, and iteratively determining process and machine parameters, including reactive mixture flow rate, conveyor speed, a dimension of the intermediate conveyance unit, and vertical positions for the ends of each fall plate resulting in a predefined predicted profile of the reactive mixture on the plurality of fall plates.

System and method for automatically setting parameters for foam production

Process for producing PU foams by reacting at least one polyol component with at least one isocyanate component in the presence of one or more catalysts that catalyse the isocyanate-polyol and/or isocyanate-water and/or isocyanate trimerization reactions, and optionally one or more chemical or physical blowing agents, with use of SiOC-linked, linear polydialkylsiloxane-polyoxyalkylene block copolymers having repeat (AB) units, obtainable through the reaction of polyether diols with equilibrated α,ω-diacetoxypolydialkylsiloxanes, wherein a sufficient amount of the SiOC-linked, linear polydialkylsiloxane-polyoxyalkylene block copolymers having repeat (AB) units is added such that the proportion by mass of said component based on the finished PU foam is from 0.0001% to 10% by weight, preferably 0.01% to 6% by weight, especially 0.05% to 5% by weight.

Production of PU foams

What are described are shaped hot-cure flexible PU foam articles, preferably mattresses and/or cushions, wherein the hot-cure flexible polyurethane foam has been obtained by reaction of at least one polyol component and at least one isocyanate component in the presence of at least one compound of formula (1a) and at least one compound of formula (1b) and at least one blowing agent and at least one catalyst.

Compression set

Process for producing cold-cure flexible slabstock PU foams by reaction of at least one polyol component and at least one isocyanate component in the presence of water and at least one catalyst and at least one crosslinker, wherein no nitrogen-containing crosslinkers having an expanded OH number above 1000 mg KOH/g are employed in a total amount >0.5 parts by weight, preferably >0.1 parts by weight, based on 100 parts by weight of polyol.

Nitrogen-free and low-nitrogen crosslinking additives for cold-cure flexible slabstock foam having improved compression and aging properties

The invention relates to a process for the preparation of SiOC-linked, linear polydimethylsiloxane-polyoxyalkylene block copolymers having (AB) repeat units, via reaction by methods known per se of polyetherdiols with a stoichiometric excess of &#x3b1;,&#x3c9;-dihydropolydimethylsiloxanes, in the presence of one or more compounds of elements of main group 13 and/or of transition group 3 as catalyst, which comprises, after completed reaction of the alcohol component, continuing the reaction until no remaining &#x2261;Si(H) groups are detectable by a gas-volumetric method, and also to the compounds thus prepared, and to their use as surfactant additives for the production of polyurethane ether foams.

Process for the preparation of SiOC-linked, linear polydimethylsiloxane-polyoxyalkylene block copolymers and their use

The invention relates to a process for the preparation of SiOC-linked, linear polydimethylsiloxane-polyoxyalkylene block copolymers having (AB) repeat units, via reaction of one or more polyetherdiols with a stoichiometric excess of &#x3b1;,&#x3c9;-dihydropolydimethylsiloxanes and at least one tertiary amine as catalyst, which comprises, after completed reaction of the alcohol component, continuing the reaction in the presence of small amounts of water until no remaining &#x2261;Si(H) groups are detectable by a gas-volumetric method.

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Essen, Germany

Rüdiger Landers