Bayer Aktiengesellschaft

Bayer Materialscience Ag

Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Henricus Peerlings

Hans-Georg Hoppe

Wolfgang Kaufhold

Michael Wagner

Markus Broich

Wolfgang Podszun

Herbert Heidingsfeld

Hartmut Nefzger

Harald Kraus

Bernhard Schulte

Rolf Gertzmann

Wolfgang Bräuer

Thorsten Rische

Hans-Georg Wussow

Wolfgang Brauer

Erika Bauer

Ludwig Trabert

Hanns-Peter M&uuml;ller

Gerald Kurek

Evgeny Avtomonov

Bernd Willenberg

Horst Gruttmann

Juergen Winkler

J&uuml;rgen Winkler

Alfred Zastrow

Faisal Shafiq

Ralf Werner

Reiner Witkowski

Robert John Carswell

Govert Woeste

Alyn James Parry

Yi Shen

Joan Miquel Garcia Martinez

Carsten Cohrs

Peter Naumann

Peter Klug

Alastair Richard Sanderson

Andrew Wynne

Maria Almato Guiteras

Wolfgang Rohrig

Bruce Lawrey

Charles S Gracik

The invention relates to a method for producing aqueous polyurethane-polyurea dispersions, aqueous polyurethane-polyurea dispersions produced by this method and their use to produce coating agents and adhesives.

Aqueous polyurethane-polyurea dispersions

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.

Process for the preparation of self-extinguishing thermoplastic polyurethanes

The present invention relates to thermoplastically processable polyurethane elastomers (TPU) with tensile strengths of &#x3e;35 MPa (measured in accordance with EN ISO 527-3), with shrinkages of &#x3c;3% and with self-extinguishing properties based on the use of at least one flameproofing agent which can be built in, a process for their preparation and their use.

Thermoplastically processable polyurethanes (TPU) with self-extinguishing properties, a process for their preparation and their use

The present invention relates to a multi-stage process for the continuous preparation of thermoplastically processable polyurethanes with improved processing properties based on various polyols.

Continuous preparation of thermoplastically processable polyurethanes

A method for preparing encapsulated red phosphorus is disclosed. The method entails obtaining a material system that contains dispersed particulate red phosphorus having a mean particle size of 0.1 to 100 &#x3bc;m in an aqueous phase that comprise urea, formaldehyde and a water-soluble silicon dioxide precursor, adding to the material system a sufficient amount of acid to lower the pH to 0 to 5 and maintaining the resulting acidic system at a temperature of 80 to 120&#xb0; C. for a period longer than one hour. The encapsulated red phosphorus of the invention is suitable for using as a flame retarding agent for plastics molding compositions.

Microencapsulated red phosphorus

A method for microencapsulating red phosphorus in polymerized urea resorcinol formaldehyde resin is disclosed. The method entails (i) preparing an aqueous mixture containing urea, resorcinol and formaldehyde, (ii) adding hexamethylene tetramine and optionally water to the mixture to yield a stabilized mixture (iii) dispersing red phosphorus in the to the stabilized mixture (iv) adding acid to the reaction mixture, and (v) collecting the resulting encapsulated red phosphorus. The product is suitable as flame retarding agent in molding compositions.

Microencapsulation of red phosphorus

Movable transparent composite systems and a process for preparing the same

A thermoplastic moulding composition that contains an aliphatic thermoplastic polyurethane (TPU) resin is disclosed. The TPU is the product of a reaction of A) a diisocyanate reactant that contains predominantly hexamethylene diisocyanate, and B) a polyol reactant that contains polytetramethylene glycol and C) a chain extending reactant that contains primarily 1,6-hexanediol. The TPU that is further characterized in the equivalence ratio of A to B and NCO index exhibits improved properties.

Aliphatic thermoplastic polyurethanes and use thereof

A flame-proof polyester molding compositions is disclosed. The composition that exhibits good flame-resistance, particularly in thin-walled moldings, contains red phosphorus, nitrogen-containing compounds and a small amount of a hydrotalcite. The composition is particularly suitable for the preparation of moldings, sheeting and fibers.

Flame-proof polyester molding compositions comprising hydrotalcite, red phosphorus and melamine cyanurate

A thermoplastic molding composition that contains an aliphatic thermoplastic polyurethane (TPU) resin is disclosed. The TPU is the product of a reaction of A) a diisocyanate reactant that contains predominantly hexamethylene diisocyanate, and B) a polyol reactant that contains polytetramethylene glycol and C) a chain extending reactant that contains primarily 1,6-hexanediol. The TPU that is further characterized in the equivalence ratio of A to B and NCO index exhibits improved properties.

A thermoplastic molding composition that contains a light-resistant aliphatic thermoplastic polyurethane elastomer is disclosed. The composition which largely contains of thermoplastic polyurethanes with high molecular weights and small amounts of thermoplastic polyurethanes with low molecular weights is useful for the preparation of a variety of articles and for use as sinterable composition in powder form.

Light-resistant thermoplastic polyurethanes, a process for their preparation and their use

A thermoplastic composition comprising aliphatic polyurethane is disclosed. The composition is charactrized in having a post weathering yellow value lower than 20 and good hardness and softening temperature values both before and after weatering for 504 hours in accordance with ISO 4892.

Aliphatic thermoplastic polyurethanes, processes for their preparation and their use

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Solingen, Germany

Henricus Peerlings