Bayer Aktiengesellschaft

Metzeler Kautschuk Gmbh

Kuno Wagner

Hanns P Muller

Kurt Findeisen

Walter Schafer

Edgar P Mohring

Artur Reischl

Bernd Quiring

Peter Haas

Jan Mazanek

Johannes Blahak

Walter Uerdingen

Klaus Konig

Ulrich Von Gizycki

Manfred Hajek

Wolfgang Oberkirch

Gottfried Schneider

Hans Scheinpflug

Wulf Von Bonin

Hans-Dieter Block

Manfred Dahm

Dietmar Schapel

Roland Richter

Werner Dietrich

Ingo Stemmler

Rudolf Braden

Christian Wegner

Rudolf Fauss

Manfred Kapps

Gerhard Balle

Peter R Muller

Hans Muller

Erwin Muller

Hans J Kreuder

Peter Seifert

Heinz Muller

Johannes Niggemann

Roland Gipp

Richard Muller

Reinhard Freimuth

Jurgen Ick

Karlheinz Andres

Erich Klauke

Rolf Dhein

Hans Rudolph

Hanns-Peter Muller

Joachim Konig

Holger Meyborg

Michael Sonntag

Walter Schroer

Peter Roessler

Wolfgang Wellner

Peter Schwabe

Heinz Ziemann

Peter Heitkamper

Konrad Nonn

Werner Mormann

Wolfgang Reichmann

Hans-Joachim Meiners

Herbert Salzburg

Peter Vehlewald

Hartmut Hetzel

Hans Hettel

Gerhard Mennicken

James M Barnes

Bernd Riberi

Eckhard De Cleur

Wolfram Mayer

Karl-Arnold Weber

Dimitrios Kerimis

Werner Clarenz

Claus-Dieter Sommerfeld

Hansjurgen Rabe

Klaus Seel

Peter Mummenhoff

Erwin Hoffmann

Hans-Jurgen Muller

Dietrich Liebsch

Hans H Schulz

Kurt Klinkmann

Peter Vogtel

Jurgen Zander

Gunter Oertel

Joachim Zirner

Hans G Schmelzer

Rudolf Helm

Hans J Hennig

Hermann Menk

Willi Eifler

Jurg Frohlich

Heinz Wolfgang Patzelt

Tilo Burkhardt

Gottfried Wallpott

Horst Conrad

Karl-Josef Kraft

Siegfried Klipfel

Hans D Golitz, Deceased

Friedrich Moller

Hanns P Mulller

Johanness Niggemann

Karlheinz Scheuss

A biologically active compound can be solubilized by reaction in different sequences to form a derivative carrying the active moiety, a linking group such as an optionally substituted diisocyanate radical, a polyether moiety such as a polyoxyethylene radical, and a terminal group such as a butyl radical, e.g. ##STR1## n=1 to 400. The active materials can be agricultural chemicals, pharmaceuticals, and the like.

Solubilizing biologically active compounds with reactive hydrogen atoms

The invention relates to a self-hardening material for supporting bandages which is packaged with exclusion of moisture and consists of an air-permeable, flexible carrier material which is impregnated and/or coated with a compound possessing at least 2 NCO groups. The self-hardening material has a greatly improved shelf life by being stored substantially oxygen-free in an air-tight pack.

Moisture-hardenable bandaging materials

The instant invention relates to an improved process for the preparation of low molecular weight polyalcohols by the catalytic hydrogenation of a mixture of different low molecular weight hydroxy aldehydes, hydroxy ketones and optionally also polyhydric alcohols such as is formed from the autocondensation of formaldehyde (such a mixture will hereinafter be referred to as 'formose'). The invention also relates to the use of these polyalcohols for the production of polyurethane resins.

Process for the preparation of low molecular weight polyhydroxyl

The present invention relates to substantially colorless organic polyisocyanates, optionally in solution in an inert solvent, having a Hazen color index according to DIN 53 409 of at most 60 and a yellow value according to DIN 6167 of at most 3.0, characterized by a content of about 0.01 to 1 ppm (by weight), based on polyisocyanate, of an organic dye soluble in the polyisocyanate and having an absorption maximum of about 560 to 590 nm or a mixture of such dyes. The present invention also relates to two processes for preparing the substantially colorless organic polyisocyanates. In the first process, the organic dye is added to the prepared polyisocyanate while in the second process the organic dye is added to the starting materials used to prepare the polyisocyanate. Finally, the present invention is directed to the production of polyisocyanate polyaddition products from the substantially colorless organic polyisocyanates and isocyanate-reactive compounds.

Substantially colorless organic polyisocyanates, processes for their

The present invention relates to a constructional material which is stable in storage and which is kept under moisture-free conditions and which comprises a substrate and a reactive one-component system which hardens on exposure to air by reaction with moisture. The present invention also relates to a process for the production of a constructional material which is stable in storage.

Constructional material

The present invention relates to a process for the production of foams containing urethane groups by reacting polyether polyols with polyisocyanates in the presence of water and in the presence of an alkaline catalyst, a compound containing a labile halogen atom and, optionally, a tertiary nitrogen containing chain extender. The present invention also relates to the foams obtainable by this process.

Process for the production of highly elastic foams containing urethane

A process for producing an inorganic-organic composition material based on gypsum and polyurethane comprising exposing calcined gypsum or anhydrite to the action of water in the presence of a polyurethane or polyurethane-urea which is dispersible in water and in the presence of up to about 20% by weight (relative to the total mixture) of an alcohol and up to about 20% by weight (relative to the total mixture) of another organic solvent, and allowing the composition to set while permitting any solvents which may be present to evaporate. The calcium sulphate may be on a textile support or the composition may be molded into flexible shaped articles of good mechanical properties.

Inorganic-organic fixed-dressings and a process for their production

The present invention is directed to a new process for the preparation of mixed trimers by at least partly trimerizing the isocyanate groups of at least two organic isocyanates of a reactivity which differs in the sense of the trimerization reaction, in the presence of trimerization catalysts and optionally interrupting the trimerization reaction at the respectively desired degree of trimerization, in which process the less reactive isocyanate component is introduced, polymerization is then commenced in the presence of the catalyst with the trimerization of at least 0.1% of the isocyanate groups and the more reactive isocyanate component is finally metered into the reaction mixture thus obtained; the mixed trimers obtained according to this process; and the use of the mixed trimers having free isocyanate groups obtained by this process, optionally in a form blocked by blocking agents for organic polyisocyanates, as a starting material for the production of polyurethane plastics materials.

Process for the preparation of mixed trimers from organic isocyanates,

The present invention relates to a process for the preparation of polyisocyanates containing isocyanurate groups by the trimerization of a proportion of the isocyanate groups of organic polyisocyanates and termination of the trimerization reaction by the addition of a catalyst poison, characterized in that the trimerization catalysts employed are quaternary ammonium salts based on the reaction product of tertiary amines and esters of acids of phosphorus which have an alkylating action. The invention also relates to the use of the polyisocyanates with isocyanurate groups obtainable by this process, optionally in a form freed from excess starting polyisocyanates and/or optionally in a form in which the isocyanate groups are blocked with blocking agents, as isocyanate components for the preparation of isocyanate-polyaddition products, especially polyurethanes.

Process for the preparation of polyisocyanates containing isocyanurate

The present invention is directed to a process for the production of polyurea-based microcellular moldings comprising reacting

Process for the production of microcellular moldings from diisocyanate

The present invention thus relates to a process for the preparation of polyisocyanates having isocyanurate groups by the trimerization of part of the isocyanate groups of organic polyisocyanates or of mixtures of di- and mono-isocyanates in the presence of basic compounds as trimerization catalysts, with termination of the trimerization reaction by the addition of a catalyst poison, characterized in that the trimerization catalysts used are 1:1-complexes of (i) basic sodium or potassium compounds and (ii) 1,4,7,10,13-pentaoxacylopentadecane or 1,4,7,10,13,16-hexaoxacyclooctadecane. This invention also relates to solutions suitable as catalyst components for this process, comprising 1:1-complexes of (i) basic sodium or potassium compounds and (ii) 1,4,7,10,13-pentaoxacyclopentadecane or 1,4,7,10,13,16-hexaoxacyclooctadecane dissolved in polar lacquer solvents and/or at least one compound within the molecular weight range of about 32 to 250 which has alcoholic hydroxyl groups and is liquid at room temperature. This invention also relates to the use of the products of the process according to the invention, optionally freed from monomeric starting polyisocyanate and/or optionally blocked with blocking agents for isocyanate groups, as an isocyanate component in the production of polyurethanes by the isocyanate polyaddition process.

The instant invention is directed to a process for the production of denatured polyaddition products of biomasses and isocyanates, comprising reacting

Process for the preparation of polyaddition products of isocyanates and

The present invention is related to compositions containing isocyanatosilanes as additives to increase the stability in storage of liquid or pasty, clear or pigmented compositions containing polyurethane prepolymers with free isocyanate groups and optionally containing solvents.

Compositions containing isocyanatosilanes as additives to increase the

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Leverkusen, Germany

Kuno Wagner