Evonik Degussa Gmbh

Evonik Operations Gmbh

Christian Wassmer

Burkhard Standke

Christoph Batz-Sohn

Stefan Scharfe

Heinz Lach

Thomas Schlosser

Regina Krause

Irene Lippert

Roland Edelmann

Andrea Heuschen

Jaroslaw Monkiewicz

Peter Jenkner

Steffen Hasenzahl

Tim Voegtlin

Martin Bartmann

Philipp Albert

Eckhard Just

Manuel Friedel

Holger Militz

Spomenko Ljesic

Kerstin Bibbo

Rene Koschabek

Carsten Mai

Thorsten Brand

Bjoern Borup

Dirk Laur

Steffen Donath

Julian Asal

Susanne Zölitz

Tim Biggs

Björn Borup

Mike Achtzehn

René Koschabek

Tim VÖGTLIN

The present invention relates to a process for preparing aqueous hydrolysates of aminoalkyltrialkoxysilanes by

Method for producing aqueous hydrolysates from aminoalkyltrialkoxysilanes

The invention relates to novel quaternary amino alcohol functional organosilicon compounds, aqueous compositions containing the latter, and a method for their production, in particular in the form of oligomers and polymers which can be present in the partially or fully hydrolyzed form and are in particular water-soluble. The compositions comprise only an extremely small portion of VOCs. The invention further relates to their use, preferably in the production of inkjet photographic papers.

Quaternary amino alcohol functional organosilicon compounds, composition containing the latter and their production and use

The invention relates to a composition and to a process for producing the composition comprising essentially water-soluble (meth)acrylamido-functional siloxanols, and to the use thereof.

Easily synthesizable, spontaneously water-soluble, essentially voc-free, environmentally friendly (meth)acrylamido-functional siloxanol systems, process for preparation thereof and use

The invention relates to a composition and to a process for producing the composition comprising (meth)acrylamido-functional siloxanes, and to the use thereof.

Easily preparable, reduced-VOC, environmentally friendly       (meth)acrylamido-functional siloxane systems, process for preparation thereof and use

Easily synthesizable, spontaneously water-soluble, essentially VOC-free, environmentally friendly (meth)acrylamido-functional siloxanol systems, process for preparation thereof and use

The invention relates to a process for preparing (meth)acrylamido-functional silanes.

Process for preparing (meth)acrylamido-functional silanes by the reaction of aminoalkyl alkoxysilanes with acrylic acid anhydride

The invention relates to a composition and to a method for the production thereof, comprising quaternary amino-functional organosilicon compounds, in particular in the form of oligomers and polymers, which can be present ranging from partially hydrolyzed form to completely hydrolyzed form, and which are in particular soluble in water, have a low VOC content, and to the use thereof.

Composition containing quaternary amino-functional organosilicon compunds and production and use thereof

Process for preparing a dispersion comprising silicon dioxide particles and cationizing agents, by dispersing 50 to 75 parts by weight of water, 25 to 50 parts by weight of silicon dioxide particles having a BET surface area of 30 to 500 m/g and 100 to 300 &#x3bc;g of cationizing agent per square meter of the BET surface area of the silicon dioxide particles, wherein the cationizing agent is obtainable by reacting at least one haloalkyl-functional alkoxysilane, hydrolysis products, condensation products and/or mixtures thereof with at least one aminoalcohol and water; and optionally removing the resulting hydrolysis alcohol from the reaction mixture. Also the process for preparing the dispersion, wherein the cationizing agent comprises one or more quaternary, aminoalcohol-functional, organosilicon compounds of formula III and/or condensation products thereof, wherein Ru and Rv are independently Calkyl group, m is 2-5 and n is 2-5. 

Methods for producing a dispersion containing silicon dioxide particles and cationization agent

Dispersion obtainable by reacting a) in 50 to 75 parts by weight of water b) 25 to 50 parts by weight of silica particles having a BET surface area of 30 to 500 m/g and c) 100 to 300 &#x3bc;g/mBET surface area of the silica particles from b) parts by weight of one or more aminofunctional, organosilicon compounds, the aminofunctional, organosilicon compound being a quaternary, aminofunctional, organosilicon compound which is obtainable by reacting at least one haloalkylfunctional silane as component A with a tertiary amine as component B in the presence of a defined amount of water and at least partly removing the resulting hydrolysis alcohol from the system.

Dispersion containing silica particles surface-modified with quaternary, aminofunctional organosilicon compounds

Composition containing quaternary amino-functional organosilicon compounds and production and use thereof

The present invention provides a composition based on the reaction at least of the following components: (i) a glycidyloxypropylalkoxysilane, (ii) an aqueous silica sol having an SiOcontent of &#x3e;20% by weight, (iii) an organic acid hydrolysis catalyst, and (iv) n-propyl zirconate, butyl titanate or titanium acetylacetonate as crosslinker, a process for its preparation, and the use thereof, particularly as a composition for scratch resistant coatings, and also provides articles thus coated.

Aqueous silane nanocomposites

The present invention relates to a process for performing a controlled hydrolysis and condensation of an epoxy-functional silane of the general formula I R1-SiR'm(OR)3-(I) in which R1 is a (III) or (IV) group and R, R&#x2032; and R&#x2033; groups are the same or different and are each hydrogen (H) or a linear, branched or cyclic, optionally substituted alkyl group having from 1 to 6 carbon atoms, A and A&#x2032; groups are the same or different and are each a bivalent alkyl group having from 1 to 10 carbon atoms, R2 groups are the same or different and R2 is a linear, branched or cyclic, optionally substituted alkyl group having from 1 to 20 carbon atoms, and m is 0 or 1, and optionally of at least one further organofunctional silane of the general formula II R2-SiR&#x2032;n(OR)3-(II) in which R2 is an organofunctional group as already defined above, R&#x2032; is methyl, R groups are each independently hydrogen or a linear, branched or cyclic alkyl group having from 1 to 6 carbon atoms and n is 0 or 1, where from 0.001 to &#x2266;5 mol of water is used per mole of alkoxy function of the silanes used, no further hydrolysis or condensation catalyst is used apart from boric acid as the hydrolysis catalyst and condensation component, and the condensates formed in the reaction are based on Si&#x2014;O&#x2014;B&#x2014; and/or Si&#x2014;O&#x2014;Si bonds.

Process for controlled hydrolysis and condensation of epoxy-functional organosilanes and the cocondensation thereof with further organofunctional alkoxysilanes

The invention relates to an aqueous composition of bis-amino-functional silicon compounds which is essentially free of organic solvents and releases essentially no further alcohol in the course of crosslinking, and to processes for preparing it and to the use thereof, for example for hydrophobization of metal or glass surfaces.

Aqueous silane systems based on bis(trialkoxysilylalkyl)amines

The present invention relates to a preparation comprising at least one specific oligomeric siloxane component and at least one polymer component, to processes for producing it and to its use in formulations, more particularly metal coating formulations.

Inorganically modified polyester binder preparation, process for production and use thereof

The present invention provides a sol-gel composition which is dilutable with water in any proportion and is based on the reaction of at least the following components: (i) a glycidyloxypropylalkoxysilane, (ii) an aqueous silica sol having a solids content of &#x3e;1% by weight, (iii) an organic acid as hydrolysis catalyst, and (iv) n-propyl zirconate, butyl titanate or titanium acetylacetonate as crosslinker, starting from a mass ratio of the solids mass of component (ii) to component (i) 0.75, a process for preparing it and its use, in particular as a sol-gel composition for corrosion control coatings, a corresponding corrosion control coat or primer coat, and articles equipped with such a coating.

Growing community of inventors

Hausen, Germany

Christian Wassmer