Covestro Deutschland Ag

Bayer Materialscience Ag

Bayer Intellectual Property Gmbh

Bayer Cropscience Ag

Polytex Sportbelage Produktions Gmbh

Bayer Aktiengesellschaft

Jens Krause

Hartmut Nefzger

Manfred Schmidt

Hans-Josef Laas

Dorota Greszta-Franz

James-Michael Barnes

Stephan Reiter

Klaus Jurkschat

Friedhelm Faehling

Markus Schürmann

Gerrit Bradtmöller

Christian Wamprecht

Stefan Wershofen

Frank Richter

Dennis Hönel

Stefan Lindner

Dieter Mager

Wieland Hovestadt

Dirk Wegener

Gerhard Klein

Joachim Wagner

Norbert Eisen

Erika Bauer

Hans-Peter Krause

Raul Pires

Florian Hupka

Joachim Krüger

Hubert Ehbing

Christian Steffens

Ernst Felske

Roland Deckwer

Axel Schmidt

Andreas Röchling

Marc Seekamp

Zdenka Finder

Lutz Liebegott

Arno Ratschinski

Ralf Hambrock

Jörg Laue

Werner Kilian

Matthias Ruhland

Ljuba Iovkova

Steffen Zanter

Hans Josef Laas

Ikebe Mitsuaki

Mikami Tadayoshi

The present invention relates to aqueous capsule suspension concentrates based on 2-[(2,4 -dichlorophenyl)methyl]-4,4'-dimethyl-3-isoxazolidinone, to the production thereof and to mixtures thereof with suspension concentrates, and to the use thereof as an agrochemical formulation.

Aqueous capsule suspension concentrates based on 2-[(2,4-dichlorophenyl)methyl]-4,4'-dimethyl-3-isoxazolidinone

The present invention relates to a composition comprising 10 to less than 50 wt.-% of at least one oligomeric polyisocyanate a-1) based on hexamethylene diisocyanate and more than 50 to 90 wt.-% of at least one polyisocyanate a-2) based on isophorone diisocyanate, comprising monomeric isophorone diisocyanate and at least one oligomeric isophorone diisocyanate, and an isocyanate-reactive component selected from the group consisting of polyester polyol, polyether polyol and mixtures thereof. It has been shown that the above mentioned mixture of the specific isocyanate group containing components improves the thermal and mechanical properties of a cured composition. Thus prepared molded articles are particularly suitable for the preparation of spectacle lenses, inter alia due to these properties.

Method for preparing optical lenses

The present invention relates to a composition comprising 10 to 50 wt.-% of at least one polyisocyanate a-1) based on hexamethylene diisocyanate, comprising at least one oligomeric polyisocyanate based on hexamethylene diisocyanate and optionally monomeric hexamethylene diisocyanate and 50 to 90 wt.-% of at least one polyisocyanate a-2) based on isophorone diisocyanate, comprising at least one oligomeric polyisocyanate based on isophorone diisocyanate and optionally monomeric isophorone diisocyanate, with the proviso that at least one of the components a-1) and a-2) additionally comprises monomeric isocyanate of the named kind, as well as at least one sulfur-containing component. It has been shown that the above mentioned mixture of the specific isocyanate group containing components improves the thermal and mechanical properties of a cured composition. Thus prepared molded articles are particularly suitable for the preparation of spectacle lenses, inter alia due to these properties.

Lightfast polyurethane compositions

The present invention relates to a process for producing a dielectric polyurethane film, in which at least the following steps are performed continuously: I) a mixture comprising: a) a compound containing isocyanate groups and having a content of isocyanate groups of &#x3e;10% by weight and &#x2266;50% by weight, b) a compound containing isocyanate-reactive groups and having an OH number of &#x2267;20 and &#x2266;150, at least one solvent having a vapor pressure at 20&#xb0; C. of &#x3e;0.1 mbar and &#x3c;200 mbar, at least one wetting additive, is produced, where the sum of the number-average functionalities of isocyanate groups and of isocyanate-reactive groups in the compounds a) and b) is &#x2267;2.6 and &#x2266;6, II) immediately after production thereof, the mixture is applied to a carrier in the form of a wet film, III) the wet film is cured to form the polyurethane film and IV) the polyurethane film is separated from the carrier. The invention further provides a dielectric polyurethane film obtainable by the process according to the invention, a process for producing an electromechanical transducer, and an electromechanical transducer obtainable by this process.

Dielectric polyurethane film

The invention relates to the use of polyurethane sealing compounds for the production of light-fast compact or foamed polyurethane bodies or polyurethane urea bodies which have excellent mechanical and optical properties and especially a very high thermostability.

Polyurethane sealing compounds

The present invention relates to new catalysts and production thereof as well as the preferred use thereof in the production of polyisocyanate polyaddition products. The described catalysts are tetravalent tin compounds with at least one ligand bonded via at least one oxygen atom or sulfur atom and containing at least one nitrogen atom.

Catalysts and use thereof in the production of polyurethanes

The invention relates to polyisocyanate polyaddition products, to a process for preparation thereof and to the use thereof.

Polyisocyanate polyaddition products, a process for preparation thereof and use thereof

Lightfast polyurethane composition

The present invention relates to a composition comprising 10 to 50 wt.-% of at least one polyisocyanate a-1) based on hexamethylene diisocyanat, comprising at least one oligomeric polyisocyanate based on hexamethylene diisocyanate and optionally monomeric hexamethylene diisocyanate and 50 to 90 wt.-% of at least one polyisocyanate a-2) based on isophorone diisocyanate, comprising at least one oligomeric polyisocyanate based on isophorone diisocyanate and optionally monomeric isophorone diisocyanate, with the proviso that at least one of the components a-1) and a-2) additionally comprises monomeric isocyanate of the named kind, as well as at least one sulfur-containing component. It has been shown that the above mentioned mixture of the specific isocyanate group containing components improves the thermal and mechanical properties of a cured composition. Thus prepared molded articles are particularly suitable for the preparation of spectacle lenses, inter alia due to these properties.

The invention relates to a method for producing organic diisocyanates by reacting the corresponding diamines with phosgene in inert solvents. High-melting diamines from the series of 1,5-naphthalenediamine, tetralindiamine, 1,4-phenylenediamine, durenediamine, and o-tolidinediamine are used as diamines. According to the invention, a suspension of the diamines in inert solvents is produced, wherein dynamic mixing units, selected from dispersion disks and rotor-stator systems, are used, and the obtained suspension is phosgenated.

Method for producing diisocyanates by phosgenating diamine suspensions

The present invention relates to high-value polyurethane (PUR) and polyurethaneurea elastomers, which can be processed in a particularly simple manner by use of low-viscosity prepolymers based on naphthalene 1,5-diisocyanate, and to a process for production thereof.

High-value polyurethane elastomers and production thereof

The present invention relates to the use of specific inorganic Sn(IV) for the production of polyisocyanate polyaddition products from a) at least one aliphatic, cycloaliphatic, araliphatic and/or aromatic polyisocyanate, b) at least one NCO-reactive compound, c) at least one thermolatent inorganic tin-containing catalyst, d) optionally further catalysts and/or activators other than c), e) optionally fillers, pigments, additives, thickeners, antifoams and/or other auxiliary substances and additives, wherein the ratio of the weight of the tin from component c) and the weight of component a) is less than 3000 ppm when component a) is an aliphatic polyisocyanate and less than 95 ppm when component a) is an aromatic polyisocyanate, wherein as thermolatent catalysts cyclic tin compounds of formula I, II or III:  wherein n&#x3e;1, are used.

Use of tin catalysts for the production of polyurethane coatings

The present invention relates to high-quality polyurethane and polyurethane urea elastomers which exhibit unique combinations of processing characteristics, oxidation resistance, mechanical and mechanical/dynamic properties in particularly demanding applications. These polyurethane elastomers and polyurethane urea elastomers are based on novel polycarbonate polyols.

Polyurethane and polyurethane urea elastomers based on polycarbonate polyols

Polyurethane prepolymers are described which are prepared from 2,4'-diiso-cyanate diphenylmethane (2,4&#x2032;-MDI), a polyol component and an aliphatic diisocyanate. These prepolymers can be cured with aliphatic, cycloaliphatic and/or aromatic amines to form a cured urethane elastomer. In comparison to cured urethane elastomers based on monomeric 2,4&#x2032;-MDI, these prepolymers provide elastomers with extended pour life, i.e. they exhibit a slower rate of viscosity buildup after curative and prepolymer are mixed which results in a reduced propensity to crack during the curing process and gives the opportunity to cast larger parts. In comparison to polyurea/urethanes prepared from cured TDI-prepolymers and which optionally include H12-MDI, the prepolymers of the invention have better health and safety aspects.

Polyurethanes cured with amines and their preparation

Isocyanate mixtures comprising: (a) NCO prepolymers having an NCO content of 1.5 to 18 wt. %; and (b) 1 to 40 wt. % of monomeric 2,2'-diisocyanatodiphenylmethane, based on the isocyanate mixture; wherein the isocyanate mixture has a total NCO content of from 2 to 22 wt. %; polyisocyanate polyaddition products prepared therefrom; and methods of making the same.

2,2'-MDI-based isocyanate mixtures, polyisocyanate polyaddition products prepared therefrom, processes for making the same and methods for their use

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Leverkusen, Germany

Jens Krause