Basf Aktiengesellschaft

Badische Anilin- & Soda-fabrik Aktiengesellschaft

Basf Aktiengellschaft

Matthias Marx

Peter Horn

Wolfgang Straehle

Dietmar Nissen

Hans U Schmidt

Ingolf Buethe

Jenoe Kovacs

Rolf Wurmb

Anton Hesse

Wolfgang Jarre

Heinrich Horacek

Robert Gehm

Walter Heckmann

Herbert Spoor

Frank Werner

Wolfram Frank

Hans Jung

Edwin Baumann

Peter Weyland

Joachim Streu

Joachim Jaehme

Reinhard Peters

Uwe Schuett

Gerhard Storck

Hellmut Bunsch

Klaus Hahn

Rainer Blum

Werner Ostertag

Erich Gulbins

Heinz Weber

Wolfram Weiss

Otto Wittmann

Job-Werner Hartmann

Georg Falkenstein

Rainer Ohlinger

Ulrich Lebert

Ernst Schoen

Manfred Barl

Gerhard Mueller

Gisbert Schleier

Johann Mayer

Walter Decker

Artur Roeber

Alfred Guthmann

Dietrich Scherzer

Klaus Eisentraeger

Dietmar Hobein

Walter Mann

Gerard DeBeuckelaer

Helmut Ganss

Raymond Denni

Peter Gerarts

Willibald Schonleben

Wilfried Roschke

Guenther Immel

Hans Reinhard

A process for the preparation of polyester polyols having an acid number of less than 1, a hydroxyl number of approximately 20 to about 400, and having a functionality of efficaciously 2 to 3, wherein polycarboxylic acids and/or their anhydrides and multivalent alcohols are polycondensed, preferably in the absence of common esterification catalysts, at temperatures of from about 150.degree. to 250.degree. C., optionally under reduced pressure, up to an acid number of from 20 to 5. The resulting polycondensate is then oxyalkylated per carboxyl group using from 1 to 5 moles of an alkylene oxide, for example 1,2-propylene oxide and/or preferably ethylene oxide, in the presence of at least one tertiary amine catalyst from the group consisting of N-methylimidazole, diazabicyclo[2,2,2]octane, diazabicyclo[5,4,0]undec-7-ene and pentamethyldiethylenetriamine and mixtures thereof, in a quantity of from about 0.001 to 1.0 weight percent based on the weight of the polycondensate, at temperatures from about 100.degree. to 170.degree. C. and under a pressure of about 1 to 10 bar.

Process for the preparation of polyester polyols

Disclosed are polyester polyols liquid at 25.degree. C., having an average functionality of from 2 to 3, a hydroxyl number of from 25 to 400, an acid number smaller than 10 and a viscosity at 25.degree. C. of from 200 to 10,000 mPas, which contain in bonded form units having at least one of the structures

Polyester polyols liquid at room temperature and their preparation and

Nylon moldings which may or may not be cellular and have improved performance characteristics are obtained by activated alkaline polymerization of caprolactam in the presence of an amorphous or partially crystalline polycondensate which has a solubility of not less than 5% by weight in caprolactam at 120.degree. C.

Nylon moldings and their production

The invention relates to a process for preparing high temperature-resistant dense or cellular polyurethane elastomers by reacting the following, preferably using low-pressure processing techniques:

Process for the preparation of high-temperature-resistant dense or

The invention relates to a process for the preparation of cellular or non-cellular polyurethane-polyurea molded articles. The new process involves the use of urethane and isocyanurate group modified 2,4- and/or 2,6-toluene diisocyanate mixtures as the polyisocyanate component to improve the flowability of the reaction mixture without adversely affecting the mechanical properties of the resulting molded articles.

Process for the preparation of optionally cellular polyurethane-polyurea

The invention is a process for the preparation of elastic polyurethane flexible foams having densities from approximately 25 to 60 kg/m.sup.3, and producing molded articles in closed molds at temperatures from 25.degree. to 80.degree. C., comprising reacting

Process for the preparation of elastic polyurethane flexible foams

The invention relates to s-triazine radical-containing polyether polyol mixtures having functionalities of from 2 to 6 and hydroxyl numbers of from 210 to 640, prepared by the oxyalkylation of a mixture of one or more polyamino-1,3,5-triazines, preferably melamine, and an alkanol having a hydroxyl functionality of from 2 to 6 and having 2 to 18 carbon atoms, water, or their mixtures, in the absence of catalysts and conventional inert polar solvents. The resulting polyether polyol mixtures are suitable for the preparation of rigid polyurethane, polyisocyanurate, and urethane group-containing polyisocyanuate foams produced by means of the polyisocyanate polyaddition process.

s-Triazine-radical-containing polyether polyol mixtures, process for

Sheet-like reinforced materials consisting of

Sheet-like reinforced material

The invention relates to urea group-containing polyisocyanate mixtures which are liquid at room temperature and have an isocyanate group content of from 15 to 30 weight percent and a diphenylmethane diisocyanate content of from 55 to 90 weight percent, obtained through the reaction of

Liquid, urea group-containing polyisocyanate mixtures

Impact-resistant nylon molding materials are prepared by activated alkaline lactam polymerization by a process in which the polymerization is carried out in the presence of a graft polymer in which

Preparation of impact-resistant nylon molding materials by alkaline

The invention relates to a one-shot process for the preparation of cellular or noncellular polyurethane polyurea parts having a modulus of flexural elasticity greater than 600 N/mm.sup.2 and densities of from 0.8 to 1.2 g/cm.sup.3 using the reaction injection molding technique, by reacting organic polyisocyanates, a polyol component, aromatic diamines, additional chain extenders and/or cross-linking agents in the presence of catalysts and optionally blowing agents, auxiliaries and/or additives, wherein the polyol component is a mixture containing

Process for the preparation of optionally cellular polyurethane polyurea

The invention relates to a process for the preparation of elastomeric molded parts having urethane or urethane and urea linkages which comprises reacting

Process for the preparation of elastomeric molded parts having urethane

Low-shrinkage nylon moldings are produced by activated alkaline lactam polymerization, preferably using the reactive injection molding technique, by a process wherein the polymerization is carried out in the presence of from 5 to 80% by weight of a polymer P which

Production of low-shrinkage nylon moldings

In order to prepare polyester or polyetherpolyester polyols, polyols, preferably di- to hexafunctional polyether polyols having hydroxyl numbers from 15 to 250 are esterified with at least one carboxylic acid anhydride, preferably phthalic acid anhydride, in the presence of N-methylimidazole, triethylenediamine, and/or triphenylphosphine as catalysts to form a carboxylic acid half-ester, and said half-ester is then oxyalkylated with at least one alkylene oxide, preferably ethylene oxide, in the presence of N-methylimidazole, triethylenediamine, triphenylphosphine, thiodialkylene glycol, employing a mixture of at least two of the compounds cited as catalysts.

Process for the preparation of polyester or polyether-polyester polyol

The invention relates to a process for the preparation of cellular, microcellular, and noncellular polyurethane polyurea molded parts with improved demolding characteristics through the reaction injection molding technique wherein unique internal mold release agents are used which are esters and/or amides prepared by reacting a mixture of montanic acid and a carboxylic acid having ten or more carbon atoms with a polyol, alkanolamine, or polyamine.

Internal release agents for polyisocyanate addition polymerization,

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Bad Durkheim, Germany

Matthias Marx