Evonik Operations Gmbh

Evonik Degussa Gmbh

Evonik Industries Ag

Jotun as

Michael Fiedel

Frank Schubert

Wilfried Knott

Michael Ferenz

Philippe Favresse

Olga Fiedel

Martin Glos

Thomas Günther

Stefan Silber

Horst Dudzik

Frauke Henning

Roland Hubel

Markus Hallack

Berend-Jan De Gans

Sarah Otto

Mona Seyfried

André Brötzmann

Stefanie Redeker

Christian Hartung

Anke Lewin

Thomas Klotzbach

Ute Hesse

Tim-Frederic Sloot

Wolfgang Hojak

Olga Jazkewitsch

Annett Halbhuber

Jana Blüm

Helmut Ritter

Petra Allef

Dagmar Windbiel

Christian Eilbracht

Dirk Kuppert

Alexander Schulz

Dirk Hinzmann

Katrin Roland

Frank Koenig

Thorsten Schierle

Jan Caßens

Sadik Amajjahe

Georg Schick

Stefan Busch

Ingrid Eissmann

Bastian Matthias Brugger

Marit Seim

Sabine Krusenbaum

Kim Öberg Hed

Prasad Vishwa Aitha

Thorsten Marochow

Doreen Engel

Stephan Schulz

Dennis Dittrich

M-Ibrahim Jussofie

Sarah Krauskopf

Andreas Stüttgen

Heike Semmler

A defoamer composition contains a compound based on polybutadiene having at least one repeat unit selected from the divalent radicals:

Defoamer composition based on organofunctionally modified polybutadienes

A process for producing an aqueous polyorganosiloxane hybrid resin dispersion includes emulsifying a polyorganosiloxane hybrid resin solution of a polyorganosiloxane hybrid resin and an organic or semi-organic solvent with an emulsifier solution that includes at least one emulsifier based on a partly hydrolysed polyvinylacetate and removing the organic or semi-organic solvent.

Aqueous polyorganosiloxane hybrid resin dispersion

Compounds are based on polyether-modified polybutadiene, where the polyether-modified polybutadiene contains repeat units selected from the divalent radicals: The radical B has at least one ester group.

Polyester-polyether-modified polybutadienes and processes for preparation thereof

Curable composition for producing coating systems having an anti-adhesive property containing at least one film-forming polymer and at least one organo-modified, branched siloxane of formula (I) or mixtures thereof.

Curable composition for coatings having an anti-adhesive property

A universal adhesion promoter contains a compound based on polybutadiene having at least one repeat unit selected from the following divalent radicals:

Universal adhesion promoter based on organofunctional modified polybutadienes

An aqueous polyorganosiloxane hybrid resin dispersion includes at least one polyorganosiloxane hybrid resin and at least one emulsifier based on partly hydrolysed polyvinylacetates. The dispersion has a solids content of 30.0% by weight-70.0% by weight, preferably 45.0% by weight-55.0% by weight, based on the polyorganosiloxane hybrid resin dispersion, and the residual solvent content is <6.0% by weight, preferably <2.5% by weight, more preferably <1.0% by weight, based on the polyorganosiloxane hybrid resin dispersion.

The invention describes (i) reaction systems for the production of siloxanes bearing acetoxy functions, comprising a) silanes and/or siloxanes bearing alkoxy groups and/or b) silanes and/or siloxanes bearing acetoxy groups, c) silanes and/or siloxanes bearing hydroxy groups, d) optionally simple siloxane cycles and/or DT cycles, e) a reaction medium, comprising acetic anhydride, perfluoroalkanesulfonic acid and preferably acetic acid, (ii) a process for producing linear or branched siloxanes bearing acetoxy functions and also the use of same for producing polyethersiloxanes.

Reactive siloxanes

A reaction product containing a non-cyclic alkoxy-functional polysiloxane is produced by heating a reaction system, which contains a cyclic polyorganosiloxane of the formula [(RSiO)], where the subscript n is an integer of at least 4 and each Ris an alkyl group or aryl group; a silane of the formula RSi(OR), where the subscript m is an integer from 1 to 4, each Rindependently is an alkyl group or aryl group, a hydrocarbyl group or a halogenated hydrocarbyl group and each Rindependently is an alkyl group; and a catalyst system comprising a metal trifluoromethanesulfonate of the formula [M][CFSO], where M is a metal atom selected from sodium (Na) and potassium (K), and a Br&#xf8;nsted acid, wherein Br&#xf8;nsted acids having a pKa&#x2264;3.0, preferably having a pKa&#x2264;2.0, particularly preferably having a pKa&#x2264;&#x2212;0.0 are used.

Process for producing non-cyclic alkoxy-functional polysiloxanes

Branched SiOC-linked polyethersiloxanes have the following formula (I) where Ris an alkyl radical having 1 to 4 carbon atoms or a phenyl radical, but preferably 90% of the radicals Rare methyl radicals; b has a value of from 1 to 10; a has a value of from 1 to 200, preferably 10 to 100, a value of from 3 to 70 when b is &#x2265;1 and &#x2264;4, or a value of from 3 to 30 when b is &#x3e;4; and Rdenotes identical or different polyether radicals, but at least one radical Ris a structural element radical of formula (II): where p=at least 2, preferably p=2-6, particularly preferably p=3.

SiOC-based polyethersiloxanes

SiOC-based polyethersiloxanes are prepared based on linear &#x3b1;,&#x3c9;-hydroxy group-bearing siloxanes. In a first step, &#x3b1;,&#x3c9;-acetoxy group-bearing linear polysiloxanes are prepared. In a second step, the &#x3b1;,&#x3c9;-acetoxy group-bearing linear polysiloxanes are converted into the desired organosiloxane units, preferably shorter organosiloxane units, wherein the thus converted organosiloxane units have &#x3b1;,&#x3c9;-acetoxy groups. In a third step, the &#x3b1;,&#x3c9;-acetoxy group-bearing linear polysiloxanes from step 2 react with polyetherols to give SiOC-based polyethersiloxanes.

Tailored SiOC-based polyethersiloxanes

SiOC-bonded polyether siloxanes are produced by transesterification of alkoxysiloxanes with polyetherols in the presence of trifluoromethanesulfonate as catalyst. The computational total water content of the reactants including alkoxysiloxanes and polyetherols is &#x2264;5000 ppm by mass, advantageously &#x2264;300 ppm by mass, preferably &#x2264;150 ppm by mass, more preferably &#x2264;100 ppm by mass, in particular &#x2264;50 ppm by mass. The determination of the individual water contents is performed beforehand, preferably by titration according to Karl Fischer.

Production of SiOC-bonded polyether siloxanes

An aqueous polyorganosiloxane hybrid resin dispersion can include at least one polyorganosiloxane hybrid resin, at least one amphiphilic emulsifier, and water.

A binder for a marine coating composition comprising the reaction product of a polysiloxane unit A' and at least one second monomer B&#x2032; that undergoes a polymerisation reaction with said polysiloxane unit A&#x2032; so as to form a copolymer of structure -[ABAB]- wherein the backbone of said copolymer comprises a plurality of hydrolysable ester functional groups that will hydrolyse in the presence of seawater.

Antifouling composition

A curable composition can have a surface with amphiphilic properties which is thus able to counteract biofouling. The curable composition includes: a component A: at least one polysiloxane, a component B: at least one polyether bearing silyl groups and/or a reaction product of a polyether bearing silyl groups with one or more isocyanate-containing compounds, and a component C: at least one catalyst.

Curable composition based on polysiloxanes

The present invention provides for the use of nitrogen compounds of formula (I) and/or of corresponding quaternized and/or protonated compounds for production of polyurethanes, compositions containing these compounds and polyurethane systems, especially polyurethane foams, which have been obtained using the compounds.

Nitrogen-containing compounds suitable for use in the production of polyurethanes

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Essen, Germany

Michael Fiedel