Wacker Chemie Ag

Daniel Schildbach

Christian Herzig

Uwe Scheim

Michael Stepp

Detlev Ostendorf

Gilbert Geisberger

Karl-Heinz Felix

Dominik Auer

Volker Stanjek

Marko Prasse

Georg Loessel

Johann Bindl

Steffen Doerrich

Herbert Koller

Pedro Marani

Steffen DÖRRICH

Georg Lössel

Alkylsilicone resins containing at least 20 mol percent of siloxy units bearing a >Calkyl group and having from 5-20 weight percent of alkoxy groups may be prepared directly by hydrolysis of chlorosilanes, and are highly effective as bulk hydrophobing agents in the preparation of fibrocement.

Alkyl silicone resin as additive for hyrophobising fibre cement

Pulverulent alkali metal alkyl siliconates having lesser hydroscopicity and improved hydrophobicity in construction materials are produced by spray drying an aqueous solution of an alkali metal alkylsiliconate having a defined range of alkali metal content, a low alcohol content, and a low chlorine content.

Method for producing pulverulent solids from alkali salts of silanols

Artificial stone having excellent mechanical and weatherability properties is prepared from a highly filled crosslinkable organosilicon composition where the filler comprises at least 20 weight percent of coarse fillers, the organosilicon component contains silicon-bonded alkoxy and or hydroxyl groups, with a catalyst containing a metal compound and an amidine or guanidine.

Curable organopolysiloxane compositions

Artificial stone which exhibits minimal visual change when exposed to weathering, UV light, and heat, is prepared by shaping and curing a crosslinkable composition based on crosslinkable organopolysiloxanes as a binder, at least 85% by weight of a filler component, the filler component containing at least 20% by weight of coarse grain mineral filler having grain sizes of 0.2 mm to 10 mm.

Cross-linkable compositions based on organosilicon compounds and thus produced molded bodies

An artificial stone can be prepared by binding a suitable stone filler with a binder which contains a silicon bonded, hydroxyl-functional silicone resin also optionally bearing silicon bonded alkoxy groups, and an organosilicon compound which is a silane or siloxane bearing silicon bonded alkoxy groups. The artificial stone is resistant to the effects of UV light as well as heat.

Solid alkali metal salts of organosilanols and/or their hydrolysis/condensation products are prepared by hydrolysis of organosilanes in water and in the presence of a basic alkali metal salt. The products contain predominately methyl and ethyl organic groups, and Cor higher hydrocarbon groups as well. The solid salts effectively hydrophobe building materials, while being easily mixed with water.

Organosiliconate powders, method for the production thereof and use thereof for hydrophobizing mineral building materials

Organosilanolate powders having a low cation to silicon ratio provide superior hydrophobing ability. The powders may be prepared on an industrial scale by hydrolysis of a silane with a basic salt solution, adding an inert organic solvent, and removing gaseous or alcoholic hydrolysis products by evaporation or distillation, precipitating the organosilanolate as a fine powder.

Water-soluble organosiliconate powder

Organopolysiloxanes having aminoalkyl groups are prepared by

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Altoetting, Germany

Daniel Schildbach