Covestro Intellectual Property Gmbh & Co. Kg

Covestro Deutschland Ag

Marina Reithmeier

Andreas Seidel

Jörg Hofmann

Klaus Lorenz

Reinhard Albers

Marcel Schornstein

Jan Heijl

Joerg Hofmann

Peter Nordmann

Christian Hahn

Sascha Froebel

Philipp Sander

Elisabeth Vogelsang

Volker Altstädt

Tobias Bubmann

The present invention relates to a composition for producing a thermoplastic moulding compound containing: A) an aromatic polycarbonate and/or aromatic polyester carbonate containing carboxy groups, wherein the polycarbonate has an acid value ranging from 0.5 to 10 mg of potassium hydroxide/g, determined in dichloromethane/ethanol as the solvent by means of potentiometric titration in accordance with DIN EN ISO 2114, method A in version 2002-06 with ethanolic potassium hydroxide solution at ambient temperature, and a weight-average molecular mass (M), determined by gel permeation chromatography at ambient temperature in dichloromethane as the solvent using a BPA polycarbonate standard, ranging from 15,000 to 40,000 g/mol, and B) a polymethyl methacrylate copolymer containing structural units derived from glycidyl methacrylate, wherein the copolymer has an epoxide equivalent weight, determined in dichloromethane as the solvent at ambient temperature in accordance with DIN EN 1877-1 in version 2000-12, of 0.05 to 3 wt % and a weight-average molecular mass (M), determined by gel permeation chromatography at ambient temperature in tetrahydrofuran as the solvent using a polystyrene standard, of 20,000 to 200,000 g/mol, wherein the weight ratio of component A and component B ranges from 95:5 to 35:65, and a method for producing a moulding compound from the composition, a moulding compound obtained according to the method, the use of the moulding compound to produce moulds, the moulds per se and a method for producing the moulds.

Composition and method for producing a transparent thermoplastic polycarbonate/polymethyl methacrylate moulding compound

The present invention relates to an insulation body based a hard, fine-cell and open-cell polyurethane/polyisocyanurate foam with a barrier film, and a method for producing same.

Polyurethane-based insulation body and method for producing same

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 present invention relates to open- and fine-celled rigid polyurethane foams which contain not only urethane groups (PUR) but also isocyanurate groups (PIR) and carbodiimide groups (CD) and to the use thereof in vacuum insulation panels.

Open-cell rigid polyurethane foam and the use thereof

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Cologne, Germany

Marina Reithmeier