Bayer Aktiengesellschaft

Heinrich Hess

Gerhard Grogler

Richard Kopp

Werner Rasshofer

Andreas Ruckes

Klaus Konig

Manfred Bock

Rudolf Hombach

Helmut Hurnik

Gunter Arend

James M Barnes

Horst Stepanski

Eduard Hansel

Thomas Scholl

Artur Reischl

Walter Schafer

Ernst Grigat

Manfred Dollhausen

Robert Eiben

Holger Casselmann

Werner Clarenz

Hermann Schafer

Lutz Georgias

Werner Drouve

Urs Thiery

Hans Tups

Gerhard Groglerl

Hans D Thomas

The present invention relates to a heat curable, one-component polyurethane reactive compositions containing

Heat curable, one-component polyurethane reactive compositions

The present invention is directed to novel urea group-containing polyisocyanates modified with long chain compounds having molecular weights of 400 to about 10,000. The present invention is also directed to a process for the preparation of modified urea group-containing polyisocyanates by reacting starting polyisocyanates which are free from urea groups with water to form urea groups in an inert reaction medium or in an aqueous mixture containing a dispersion stabilizer, wherein the starting polyisocyanates are mixed or reacted with long chain compounds having molecular weights of 400 to about 10,000 before the reacting the starting polyisocyanates with water and/or the long chain compounds are added to the inert reaction medium and/or to the water.

Urea group-containing polyisocyanates modified with long chain compounds

The present invention relates to a process for the preparation of a modified 1,5-naphthylene diisocyanate containing urea and biuret groups comprising reacting

Process for the preparation of highly elastic plastics

The present invention is directed to a polyurethane reactive adhesive compound comprising:

Polyurethane reactive adhesive compounds containing finely dispersed

The present invention is directed to a reactive polyurethane mixture comprising:

Polyurethane-based one-component reactive adhesives

The present invention is directed to a polyurethane-based reactive adhesive comprising A) at least one polyisocyanate, B) at least one polyol, and C) at least one polyamine C which is a polyether amine containing at least two amino groups, at least one phenyl group and recurring polyoxyalkylene units.

Polyurethane-based reactive adhesives in which the isocyanate is

The invention relates to a process for improving the flowability and preventing the agglomeration of finely divided dimerized 2,4-toluene diisocyanate in which a precipitated silicas and/or pyrogenic silica having a hydrophobic surface is added to the finely divided dimerized 2,4-toluene diisocyanate. The invention also relates to the finely divided dimerized 2,4-toluene diisocyanate prepared by this process.

Process for improving the flowability of dimerized

The present invention relates to heat-curable reaction systems prepared by mixing (a) solid polyisocyanates (optionally deactivated) having melting points above 80.degree. C., (b) OH- and/or NH.sub.2 -terminated polyoxyalkylene polyethers that have molecular weights of 400 to 10,000 and are liquid at room temperature, (c) solid OH- and/or NH.sub.2 -terminated polyesters that have molecular weights of 400 to 20,000 and are solid at room temperature, and which are thoroughly distributed throughout the mixture but are not homogeneously miscible with the polyether, (d) optional low molecular weight chain-extending agents that contain OH and/or NH.sub.2 groups and have a molecular weight of 62 to 399, and (e) optional catalysts and other auxiliaries. The invention further relates to a method for preparing elastomers, coating compounds, sealing compounds, or adhesives by heat-curing the heat-curable systems.

Heat-curing polyether-polyester-polyurethane ureas

The present invention relates to the preparation of powdered heat-curable reaction mixtures in which melt suspension of (a) solid polyisocyanates having melting points above about 60.degree. C., (b) molten high molecular weight isocyanate-reactive compounds having molecular weights of from 400 to 10,000 that have melting or softening points of 50.degree. C. to 150.degree. C., and (c) optionally, solid or liquid low molecular weight chain-extending or crosslinking compounds having molecular weights of from 62 to 399, are added to an inert solvent containing an emulsifier, thereby forming powdered heat-curable reaction mixtures in which components (a), (b), and (c) remain in uncrossedlinked form. The invention further relates to the use of the heat-curing reaction mixtures for the preparation of high-quality polyurethane polyurea plastics.

Heat-curing reactive powders based on polyurethanes

This invention relates to a process for preparing polyurethane urea elastomers by reacting (a) compounds containing at least two isocyanate-reactive groups and having a molecular weight in the range from about 400 to about 10,000; (b) polyisocyanates; and (c) aromatic diamines corresponding to the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen or alkyl.

Process for the preparation of heat-stable polyurethane urea elastomers

Polyurethanes containing uretdione rings are produced by reacting a polyisocyanate containing a uretdione ring with a relatively high molecular weight dihydroxyl compound in the presence of a bismuth salt of an organic carboxylic acid and a low molecular weight aromatic diamine. The low molecular weight aromatic diamine is used in a quantity which is 5 to 10 times the quantity of bismuth salt used. These solid polyurethanes are formed in relatively short reaction times and possess outstanding mechanical properties.

Process for the preparation of polyurethanes containing uretdione rings

The present invention relates to a process for the production of polyurethane urea elastomers from

Process for the production of cold-setting polyurethane urea elastomers

The present invention is directed to a process for the production of a polyurethane urea elastomer which comprises preparing a heterogeneous mixture of

Process for the production of heat-resistant polyurethane urea elastomers

High molecular weight amines having reduced low molecular weight amine contents are obtained by reacting a mixture of (1) a high molecular weight amine and (2) a low molecular weight amine with (3) an isocyanate in quantities such that from 0.5 to 10 equivalents of isocyanate are present for each equivalent of low molecular weight amine. The product of high molecular weight amines is particularly useful in the production of isocyanate addition products such as polyurethane plastics and foams.

Process for producing higher molecular weight amino compounds having

This invention relates to N,N'-bis(5-isocyanatonaphthyl)urea and a process for its preparation by hydrolysis of naphthalene-1,5-diisocyanate. This invention also relates to a method for preparing a polyurethane or polyurea comprising reacting N,N'-bis(5-isocyanatonaphthyl)urea with an NCO-reactive compound.

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Leverkusen, Germany

Heinrich Hess