Bayer Materialscience Ag

Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Markus Broich

Henricus Peerlings

Hartmut Nefzger

Wolfgang Kaufhold

Wolfgang Brauer

Erika Bauer

Faisal Shafiq

Govert Woeste

The invention relates to water-vapor permeable, flat composite parts consisting of at least two layers, at least one layer being made of a polyester and polyether-based thermoplastic polyurethane. The invention also related to the use thereof.

Water-vapour permeable composite parts

Light-stable, sinterable, thermoplastic polyurethanes with improved blooming behavior and good thermal stability as well as good technical processability are produced from an aliphatic diisocyanate using one or more chain extenders corresponding to a specified formula. These polyurethanes are particularly useful in the production of molded articles, particularly molded articles for automotive interiors.

Aliphatic, sinterable, thermoplastic polyurethane molding compositions with improved blooming behavior

Light-stable, thermoplastic polyurethanes with good processability and having an ASTM D-1003 haze value of less than 10%, the polyurethane prepared by a process comprising: reacting: (a) a diisocyanate component comprising 1,6-hexamethylene diisocyanate; (b) a chain extension component consisting of (b1) 1,4-di(&#x3b2;-hydroxyethyl)hydroquinone and (b2) at least one chain extender selected from the group consisting of diols having a 2 or 3 carbon atom chain length between the two OH groups, in a molar ratio of chain extender (b1) to chain extender (b2) of 10:1 to 1:4; and (c) at least one polyol component having a number average molecular weight of 450 to 10000 g/mol, and an average number of Zerewitinoff-active hydrogen atoms of at least 1.8 to at most 3.0; wherein the ratio of isocyanate groups in component (a) to isocyanate-reactive groups in components (b) and (c) is 0.9:1 to 1.1:1.

Transparent thermoplastic polyurethanes having low haze and good processability, methods of making the same, and uses therefor

The present invention relates to a process for the preparation of self-extinguishing thermoplastic polyurethanes which optionally contain conventional additives and/or auxiliary substance.

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Hückelhoven, Germany

Markus Broich