Evonik Degussa Gmbh

Evonik Operations Gmbh

Kerstin Bibbo

Burkhard Standke

Christian Wassmer

Jaroslaw Monkiewicz

Roland Edelmann

Irene Lippert

Bjoern Borup

Christian Waßmer

A process can prepare a colourless, methanolic solution of 3-(N-benzyl-2-aminoethyl)aminopropyltrimethoxysilane hydrochloride. The process includes, in step 1 fractionally distilling the vinylbenzyl chloride reactant component with addition of at least one stabilizer, and in step 2, metering and mixing the distillate (vinylbenzyl chloride) from step 1 into an initial charge of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane and methanol in a molar ratio of the N-(2-aminoethyl)-3-aminopropyltrimethoxysilane to vinylbenzyl chloride of 1.0:0.80 to 1.0:1.15 and at a temperature in the range from 40 to 60&#xb0; C. and leaving them to react further. The colourless, methanolic solution has an APHA colour number of &#x3c;200 mg Pt&#x2014;Co/l.

Process for preparing a colourless solution of 3-(N-benzyl-2-aminoethyl)aminopropyltrimethoxy-silane hydrochloride in methanol

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

Method for producing aqueous hydrolysates from aminoalkyltrialkoxysilanes

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

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Rheinfelden, Germany

Kerstin Bibbo