Wacker-chemie Gmbh

Wacker Chemie Ag

Erich Pilzweger

Michael Stepp

Stefan Oberneder

Ulrich Demlehner

Bernward Deubzer

Herbert Eck

Wolfgang Hechtl

Hans Mayer

Norman Dorsch

Heinrich Hopf

Arvid Kuhn

Andreas Köllnberger

Doris Filusch

Otto Zeller

Michael Bauer

A primer composition for silicone rubbers, in particular for addition-crosslinking silicone rubbers, comprises a tetraalkoxysilane and/or partial hydrolysate thereof, a metal salt, alkoxide, or chelate and/or partial hydrolysate thereof, a silicone resin, and from 50-95% by weight of solvent. The primer provides excellent adhesion between silicone rubber and numerous substrates.

Primer for heat-curable silicone elastomers

The invention relates to organosilicon compounds with at least three silicon atoms, consisting of units of the formula (I) R,Si(NR,C&boxH;ONR,),(NR,C&boxH;ONR,),Y,O,&lsqb;(CR,),&rsqb;,, where Y represents units of the formula (II) &mdash;SiR,(NR,C&boxH;ONR,),(NR,C&boxH;ONR,),, where R, R,, R,, R,, R,, R,and R,independently of each other can be either identical or different and represent a hydrogen atom or possibly substituted monovalent hydrocarbon radicals with between 1 and 20 carbon atoms; and where a, k, t, n, m, r, s, p and q have the meaning assigned to them in claim,, under the provision that the sum of p&plus;q is &lE;3, the sum of a&plus;k&plus;l&plus;m&plus;n&plus;r equals 4, the sum of m&plus;r equals 0 or 1, and the organosilicon compound of the invention contains at least one unit of formula (I) where t is not equal to 0.

Organosilicon compounds having urea groups, method for producing same and their utilization

Organopolysiloxane compounds cross-linkable by cleaving of alcohols to

A process for preparing aqueous emulsions from high-molecular-weight organopolysiloxanes which are solid at room temperature, in the absence of organic solvents, which comprises dissolving the high-molecular-weight organopolysiloxane which is solid at room temperature in a low-molecular-weight organo(poly)siloxane which is liquid at room temperature, and emulsifying this solution with water in the presence of an emulsifier and other additives, if desired.

Process for preparing aqueous emulsions of high-molecular-weight

The present invention relates to gypsum powders containing a hydrophobic agent and to water-repellent articles which are prepared from gypsum containing powered hydrophobic agents, in which the hydropohobic agents are prepared by spray-drying a mixture containing at least water, an organopolysiloxane having Si-bonded hydrogen and a water-soluble, film-forming polymer having a turbidity point of from 35.degree. to 98.degree. C.

Process for preparing water-repellent articles from gypsum powder

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Julbach, Germany

Erich Pilzweger