Evonik Degussa Gmbh

Evonik Operations Gmbh

Degussa Aktiengesellschaft

Degussa-huels Aktiengesellschaft

Holger Loesch

Emmanouil Spyrou

Susanne Kreischer

Andrea Diesveld

Thomas Weihrauch

Werner Grenda

Klaus Behrendt

Christoph Lammers

Andrea Thesing

Manfred Kreczinski

Friedrich Georg Schmidt

Andreas Wenning

Eike Langkabel

Sandra Reemers

Elke Gollan

Sabine Naumann

Tobias Unkelhaeusser

Stephan Kohlstruk

Martina Ortelt

Rainer Lomoelder

Dirk Fuchsmann

Dirk Hoppe

Guenter Schmitt

Pedro Cavaleiro

Jörg-Joachim Nitz

Britta Kohlstruk

Günter Schmitt

Iris Brückner

Lars Hellkuhl

Marina Grammenos

Ralph Aldridge

Marion Ebbing-Ewald

Alina Meier

Uwe Korek

Marion Ewald

Katharina Cielaszyk

Tobias Unkelhäusser

Birte Olland

Michael Spittler

Zuhal Tuncay

Lisa-Maria Elmer

The invention relates to a process for preparing a diisocyanate of the formula (A)

Process for preparing diisocyanates based on lysine

The present invention provides compositions consisting of a) at least one metal salt, ammonium salt or phosphonium salt of a strong Br&#xf8;nsted acid and b) at least one primary aliphatic monoamine, processes for preparation thereof and use thereof.

Compositions consisting of Br&#xd8;nsted acids and monoamines

The present invention relates to a composition comprising a) at least one epoxy resin, b) at least one amine having at least two secondary amino groups which are both part of an organic ring system, and c) at least one salt of a very strong Br&#xf8;nsted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and ammonium ions, and to processes for production thereof and use thereof.

Fast-curing epoxy systems

The present invention provides a composition comprising a) at least one epoxy resin, b) at least one cyclic amine of the formula (I) in which 

Provided is a storage-stable polyurethane prepegs and mouldings produced therefrom composed of polyurethane compositions with liquid resin components, preferably liquid polyols. A prepeg contains(A)a fibrous support and (B)a matrix material containing a reactive polyurethane composition. The polyurethane composition contains a mixture of a liquid resin component(b)having a functional group reactive towards an isocyanate and having a glass transition temperature(Tg)or melting point below 25&#xb0; C., with a hydroxyl number of 50 to 2000 mg KOH/gram, and a curing agent(a)comprising a di- or polyisocyanate internally blocked or blocked with a blocking agent. In addition, the polyurethane composition contains 0.6 to NCO equivalents or 0.3 to 1 uretdione group in (a) for each functional group of (b).

Storage-stable polyurethane prepregs and mouldings produced therefrom composed of a polyurethane composition with liquid resin components

The invention relates to storage-stable one-component (1K) polyurethane prepregs and to shaped bodies produced therefrom.

Storage-stable one-component polyurethane prepregs and shaped bodies composed of polyurethane composition that have been produced therefrom

A coating composition that includes an allophanate-containing compound can offer improved scratch resistance. The coating composition includes A) at least one allophanate-containing compound having the formula (1): wherein R, R-Rare each independently identical or different hydrocarbyl radicals having 1-8 carbon atoms, which may be branched or cyclic, or else may be integrated together to form a cyclic system, and m and n are each independently 0-2, B) a binder, C) optionally, an aliphatic or cycloaliphatic polyisocyanate having an NCO functionality of at least 2, D) optionally, a catalyst, E) optionally, an auxiliary and/or additive, and, F) optionally, a solvent.

Coating compositions comprising monoallophanates based on alkoxysilane alkyl isocyanates

A monoallophanate can be used in paint or adhesive compositions. The monoallophanate has the formula 1: where R, R-Rare each independently identical or different hydrocarbyl radicals having 1-8 carbon atoms, which may be branched or cyclic, or else may be integrated together to form a cyclic system, and m and n are each independently 0-2.

Monoallophanates based on alkoxysilane alkyl isocyanates

The invention relates to a process for producing storage-stable polyurethane prepregs and to moldings (composite components) produced therefrom. The prepregs and, respectively, components are produced by mixing (meth)acrylate monomers, (meth)acrylate polymers, hydroxy-functionalized (meth)acrylate monomers and/or hydroxy-functionalized (meth)acrylate polymers with uretdione materials. Photoinitiators can also optionally be added. This mixture or solution is applied by known processes to fiber material, e.g. carbon fibers, glass fibers or polymer fibers, and is polymerized with the aid of radiation or of plasma methods. Polymerization, e.g. at room temperature or at up to 80&#xb0; C., gives thermoplastics or thermoplastic prepregs, and these can subsequently also be subjected to forming processes. The hydroxy-functionalized (meth)acrylate constituents can then be crosslinked with the uretdiones already present within the system, by use of elevated temperature. It is thus possible to produce dimensionally stable thermosets or dimensionally stable crosslinked composite components.

Composite semifinished products and mouldings produced therefrom and directly produced mouldings based on hydroxy-functionalized (meth)acrylates and uretdiones which are crosslinked by means of radiation to give thermosets

The invention relates to a method for producing storage-stable polyurethane prepregs and molding bodies produced therefrom (composite components), which can be obtained by a method using a polyurethane composition in solution and by impregnation of fiber-reinforced materials such as of woven fabrics and laid scrim using reactive polyurethane compositions.

Process for the production of storage-stable polyurethane prepregs and mouldings produced therefrom from dissolved polyurethane composition

The present invention relates to a composition comprising (A) an isocyanate of formula (I) OCN-A-SiRRR(I), wherein A is straight-chain, branched, substituted and/or unsubstituted aliphatic hydrocarbyl of 1 to 12 carbon atoms or substituted or unsubstituted cycloaliphatic hydrocarbyl of 4 to 18 carbon atoms, wherein Ris selected from the group comprising &#x2014;O&#x2014;R, wherein Rand Rare each independently selected from the group of substituents comprising &#x2014;Rand &#x2014;O&#x2014;R, and wherein &#x2014;Ris hydrocarbyl of 1 to 6 carbon atoms, and B) a Bronstedt or Lewis acid or a compound which releases a Bronstedt or Lewis acid at room temperature; and also to a process for producing a stabilized alkoxysilane-containing isocyanate comprising the step of adding a Lewis or Bronstedt acid or a compound which releases a Bronstedt or Lewis acid at room temperature to an alkoxysilane-containing isocyanate.

Compositions comprising alkoxysilane-containing isocyanates and acid stabilisers

A process for the production of storage-stable epoxy prepregs is provided. In addition, composites produced from the prepregs based on epoxides and acids having groups reactive to free-radical polymerization is provided.

Process for the production of storage-stable epoxy prepregs, and composites produced therefrom, based on epoxides and acids amenable to free-radical polymerisation

The invention relates to heat-curing powder-lacquer compositions exhibiting a matte surface after curing of the coating, as well as to a simple method for production of the same.

Heat-curing powder-lacquer compositions yielding a matte surface after curing of the coating, as well as a simple method for production of same

The invention relates to new &#x3b2;-hydroxyalkylamides, to a method for production of same and to the use of same.

&#x3b2;-hydroxyalkylamides, a method for production of same and use of same

The invention relates to novel &#x3b2;-hydroxyalkylamides, to a method for their production and to the use thereof.

Growing community of inventors

Herne, Germany

Holger Loesch