Basf Aktiengesellschaft

Basf Se Corporation

Ralf Fritz

Gunther Lukat

Bernd Bruchmann

Andre Kamm

Hans-Juergen Reese

Nils Mohmeyer

Thomas Mathieu

Frank Prissok

Peter Falke

Anna Cristadoro

Hans U Schmidt

Daniel Schoenfelder

Andreas Emge

Michael Harms

Daniel Freidank

Andrea Eisenhardt

Inge Rotermund

Regina Hendreich

Georg Partusch

Marcus Leberfinger

Patrick Bolze

Antje Van Der Net

Daniela Tepe

Imbridt Murrar

Markus Templin

Annika Habicht

Andres Cabrera

Birgit Magg

J&ouml;rg P&ouml;ltl

Michael Fader

Michael Bauer

J&uuml;rgen Schneider

Astrid Weidemann

Disclosed are polyurethane encapsulating compounds for embedding hollow fibers of filter elements, obtainable by mixing a polyol component (A) and an isocyanate component (B), including at least one aromatic isocyanate, to give a reaction mixture and reacting the mixture to completion to give the polyurethane encapsulating compound. The polyol component (A) includes at least one fatty-acid-based polyol (a1) having a hydroxyl number of greater than 50 to less than 500 mg KOH/g and a functionality of from 2-6, and at least one bismuth catalyst (a2), obtainable by mixing a bismuth carboxylate (a2-1) with an amine compound (a2-11) having at least one tertiary nitrogen atom and at least one isocyanate-reactive hydrogen atom. The molar ratio of bismuth to amine compound (a2-11) is 1:0.5-1:50. Also disclosed are methods for producing filter elements using the polyurethane encapsulating compounds and to uses of the polyurethane encapsulating compounds for the embedding of hollow fibers.

Storage-stable polyurethane casting compound for embedding hollow fibres in the production of filter elements

Polyurethane encapsulating compounds for the embedding of hollow fibers of filter elements are provided. These are obtainable by mixing a polyol component (A) and an isocyanate component (B) to give a reaction mixture and reacting the mixture to completion to give the polyurethane encapsulating compound, wherein the polyol component (A) comprises (a1) at least one fatty-acid-based polyol, (a2) at least one amine compound having at least one tertiary nitrogen atom and at least one isocyanate-reactive hydrogen atom and (a3) at least one metal compound that functions as a polyurethane catalyst, wherein the polyurethane catalyst (a3) does not comprise any tin, lead and/or mercury and the isocyanate component (B) comprises at least one aromatic isocyanate having at least two isocyanate groups. Further provided is a method for producing filter elements using the polyurethane encapsulating compounds and the use of the polyurethane encapsulating compounds for the embedding of hollow fibers.

Storage-stable polyurethane potting compound for embedding of hollow fibres in the production of filter elements

The present invention relates to a method for adsorbing and/or absorbing oil, by bringing oil into contact with a polyurethane sponge with excellent mechanical properties.

Oil-absorbent polyurethane sponges with good mechanical properties

The invention relates to a polyol mixture which comprises as components These polyol mixtures can be employed to produce polyurethane-based embedding compositions. The invention additionally relates to embedding compositions based on the polyol mixtures (A) described at the outset and at least one modified isocyanate (B) and to the use of the embedding compositions as potting material. The invention further relates to a process for producing the embedding compositions as described at the outset. The invention additionally relates to dialysis filters which comprise the embedding compositions described at the outset. Finally, the invention relates to the combination of components (A) and (B) which are present separately but are to be used together.

Casting compounds based on polyurethane

The present invention relates to an open-cell polyurethane foam comprising polyester and polyether structures and having a density of 70 to 300 g/L, 1 to 20 cells/cm, a rebound intensity greater than 30%, an elongation at break of greater than 200%, a tear propagation resistance of greater than 1.2 N/mm and a tensile strength of greater than 200 kPa. The present invention further relates to a process for producing inventive open-cell polyurethane sponges and to the use thereof as a pipe cleaning sponge.

Coarse-cell polyurethane elastomers

The invention relates to a process for the preparation of polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), wherein a polyisocyanate a) used is at least one polyisocyanate ai) having an average functionality of greater than 2, a content of diisocyanates of not more than 2% by weight and a content of uretonimines of not more than 4% by weight, based in each case on the weight of the polyisocyanate ai).

Process for preparing polyurethanes

The invention provides composite components constructed of a layer i) comprising short fiber reinforced PU and having a paintable surface, and a layer ii) comprising long fiber reinforced polyurethane, and also provides a process for producing them, and provides for their use as exterior bodywork parts.

Polyurethane composite components and their use in exterior bodywork parts

A process for preparing a homogeneous polyol component which is stable to separation and consists of at least one compound of relatively high molecular weight having at least two reactive hydrogen atoms and low-molecular-weight chain extenders and/or crosslinkers and, if desired, of blowing agents, catalysts and other auxiliaries and/or additives comprises the addition to this component of at least one amine and at least one organic and/or modified organic isocyanate; the invention also provides the corresponding polyol component which is stable to separation. The use of this polyol component for preparing PUR, in particular compact or foamed PUR, is also described.

Preparation of a homogeneous polyol component which is stable to

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Bissendorf-Schledehausen, Germany

Ralf Fritz