Covestro Deutschland Ag

Bayer Materialscience Ag

H.c. Starck Gmbh

Bayer Intellectual Property Gmbh

Covestro Intellectual Property Gmbh & Co. Kg

Lutz Brassat

Hartmut Nefzger

Uwe Kuenzel

Peter Haas

Stephan Kirchmeyer

Reinhard Albers

Erika Bauer

Sven Meyer-Ahrens

Stephanie Vogel

Matthäus Gossner

Jürgen Schloβmacher

Michael Schedler

Dieter Seidel

Jürgen Schlossmacher

Matthaeus Gossner

Marion Frommont

Veronica-Alina Faerber

Sabine Dippe

Matthaus Gossner

Uwe KÜNZEL

The invention relates to a method for producing soft polyurethane foam obtained by reacting a composition containing a component A1 containing at least one filled polyol, a component A2 containing compounds reactive with isocyanates and having a hydroxyl value of ≥20 to <100 mg KOH/g, the component A2 not containing any filled polyol, a component A3 containing water and/or at least one physical blowing agent, a component A4 containing auxiliary agents and additives, and a component B containing di- and/or polyisocyanates, characterized in that the reaction occurs in the presence of 0.5 to 3 parts by weight of an organic urea derivative as component C, which is obtained by reacting urea with a difunctional amine having a number-average molecular weight of 200 to 1000 g/mol. The invention also relates to a soft polyurethane foam obtainable by the method.

Polyurethane foam materials having reduced cold-flow effect and method for producing same

The invention relates to a polyester polyol which contains building units which are derived from ethylene glycol and/or diethylene glycol and which is characterized in that the polyester polyol furthermore comprises building units which are derived from at least one long-chain polyester polyol with a number-average molar mass of 1500 to 8000 Da. The invention further relates to a process for the production thereof and use thereof, in particular for the production of rigid PUR/PIR foams.

Polyester polyols with long-chain polyether polyol building blocks and use thereof in rigid pur/pir foams

Polyester polyols are produced by reacting terephthalic acid with a glycol corresponding to the formula H&#x2014;(OCHCH)&#x2014;OH and an aliphatic dicarboxylic acid. These polyester polyols are particularly useful for the production of polyurethane) (PUR) and polyurethane/polyisocyanurate (PUR/PIR) foams for use in insulation applications.

Polyester polyols from terephthalic acid and oligoalkylene oxides

The invention relates to a process for the purification of thiophenes by means of precipitation. The purified thiophenes are liquid at room temperature, have a purity of at least 99.50 wt. %, and are represented by the following general formula (I), wherein Rand Rindependently of each other are, for example, a linear or branched C-C-alkyl group, or together form a fused C-C-dioxyalylene ring. The process involves: (I) precipitating the thiophene by cooling a solution of the thiophene and at least one solvent; or (II) precipitating the thiophene by adding the thiophene to a cooled solution of solvent and optionally the thiophene. The solutions are cooled to a temperature below the melting point of the thiophene.

Process for the purification of thiophenes

Growing community of inventors

Leverkusen, Germany

Lutz Brassat