Wacker-chemie Gmbh

Hechtl, Wolfgang

Wolfgang Hechtl

Ernst Wohlfarth

Paul Hittmair

Norman Dorsch

Eckhart Louis

Stefan Oberneder

Richard Schmidlkofer

Friedrich Hockemeyer

Oswin Sommer

Heinrich Marwitz

Arnold Garhammer

Rudolf Heinrich

Frank Achenbach

Wolfgang Ziche

Armin Fehn

Michael Stepp

Peter August

Alois Strasser

Erich Pilzweger

Susanne Straussberger

Heinz Hefner

Alfred Heinrich

Klaus Matejcek

Christian Finger

Ernst Wohlfahrt

Christian Baumgartner

Adolf Kleinschwarzer

Doris Filusch

Ernst Aigner

Margot Kinne

The invention relates to a preparation for producing a polymer crosslinkable by condensation reaction, which comprises at least one aminopropyltriethoxysilane and at least one polydialkylsiloxane having two terminal hydroxyl groups, wherein the polydialkylsiloxane is represented by the following formula (1):HO—[—SiRR—O—]—OH   formula ()wherein in formula (1) Rand Rmay be the same or different and may be selected from the group consisting of alkyl groups having 1 to 8 carbon atoms and wherein x is an integer from 30 to 2500.

Preparation for producing a polymer crosslinkable by condensation reaction, polymer composition crosslinkable by condensation reaction, process for producing a silicone elastomer and silicone elastomer

The invention relates to a method for producing organopolysiloxane terminated with alkoxy groups, wherein A) organopolysiloxane terminated with HO is reacted with B) alkoxysilane having at least three alkoxy groups and/or whose partial hydrolysate is made to react in the presence of C) acid phosphoric acid ester of general formula (I): (HO) OP(&mdash;O&mdash;&lsqb;(CR ) &mdash;O&rsqb; &lsqb;(CR ) &rsqb; &mdash;L&mdash;M) , wherein a&equals;1 or 2; R and R &equals;a hydrogen, methyl or hydroxyl radical; b and d&equals;2 or 3; c&equals;integral values from 2 to 15; e&equals;0 or 1; L&equals;a radical from the group &mdash;O&mdash;, &mdash;COO&mdash;, &mdash;OOC&mdash;, &mdash;CONR &mdash;, &mdash;NR CO&mdash; and &mdash;CO&mdash;; R and R &equals;a hydrogen or a C -C -alkyl radical and M&equals;a monovalent, optionally a hydroxyl, fluorine, chlorine, bromine, C -C -alkoxylalkyl or cyano group substituted C - to C -hydrocarbon radical, provided that the radicals R and R can only be at one given time a hydroxyl radical in each hydrocarbon atom. The invention further relates to RTV-1-alkoxy masses comprising the reaction product containing organopolysiloxane terminated with alkoxy groups as the essential constituent.

Organopolysiloxane materials which can be cross-linked by cleaving alcohols into elastomers

Storage-stable organopolysiloxane compositions which can be crosslinked to give elastomers with elimination of alcohols

Cross-linkable organopolysiloxane materials formed into elastomers by separating alcohols

Organopolysilozane compositions crosslinkable with elimination of alcohols to give elastomer

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

In silicone release coatings obtained by crosslinking compositions whose constituents comprise (A) alkenyl-functional polyorganosiloxane and an SiH-functional organosiloxane,

Regulating the release force of silicone coatings which repel tacky

A paste composition which is used in the preparation of dental impression compositions containing:

Paste composition containing an organopolysiloxane, platinum and filler

Hydroxyl terminated diorganopolysiloxanes may be crosslinked with a mixture containing (1) a product obtained from the reaction of (a) silicic acid esters with (b) an organic tin compound of the formula

Reaction products of silicic acid esters and organic tin compounds

This invention relates to adhesive compositions which may be used for bonding laminated glass and for glueing silicon semiconductor elements onto substrates in manufacturing solar cells. These adhesive compositions contain organopolysiloxanes having SiC-bonded vinyl groups and Si-bonded hydrogen as well as catalysts which promote the addition of Si-bonded hydrogen to vinyl groups. All of the organopolysiloxanes in these compositions are free of Si-bonded hydroxylk or alkoxy groups and contain on the average 2 to 1,000 silicon atoms per molecule in which at least 99.5 percent and preferably 99.9 percent of the number of Si-bonded hydrogen atoms are present in organopolysiloxanes containing one Si-bonded hydrogen atom per molecule and one SiC-bonded vinyl group per molecule or containing 2 Si-bonded hydrogen atoms per molecule and at least 99.5 percent and preferably 99.9 percent of the number of SiC-bonded vinyl groups are present in organopolysiloxanes containing one Si-bonded hydrogen atom per molecule and one SiC-bonded vinyl group per molecule or containing 2 SiC-bonded vinyl groups per molecule.

Adhesive compositions and method employing same

Impression compositions containing (a) an organopolysiloxane having at least two alkenyl groups and containing at least 20 mol percent of monoorganosiloxane units, (b) an organopolysiloxane having at least 3 Si-bonded hydrogen atoms per molecule, (c) a catalyst which promotes the addition of Si-bonded hydrogen atoms to alkenyl groups and (d) 30 to 90 percent by weight of a filler, based on the total weight of the composition. Impressions are obtained by applying a composition containing components (a), (b), (c) and (d) to a surface of which an impression is to be made, crosslinking said composition and thereafter removing the formed structure from the contacted surface.

Impression compositions and process for preparing impressions

Coating compositions which impart adhesive repellent or non-adherent properties to substrates coated therewith comprising (1) vinyl endblocked diorganopolysiloxanes having an average viscosity in excess of 10.sup.6 cP at 25.degree. C. in which from 3 to 30 mole percent of the nonterminal siloxane units are diphenylsiloxane units and at least 50 mole percent of the remaining organic radicals on the siloxane units are methyl radicals, (2) organopolysiloxanes having at least 3 Si-bonded hydrogen atoms per molecule, (3) catalysts which promote the addition of Si-bonded hydrogen atoms to the vinyl groups and (4) an inert organic solvent. These coating compositions may be applied to cellulosic materials and other substrates to impart varying degrees of adhesive repellency thereto.

Adhesive repellent coatings and substrates coated therewith

Coating compositions which impart adhesive repellent or non-adherent properties to substrates coated therewith comprising (1) vinyl endblocked diorganopolysiloxanes having an average viscosity in excess of 10.sup.6 cP at 25.degree. C. in which from 3 to 39 mole percent of the nonterminal siloxane units are diphenylsiloxane units and at least 50 mole percent of the remaining organic radicals on the siloxane units are methyl radicals, (2) organopolysiloxanes having at least 3 Si-bonded hydrogen atoms per molecule, (3) catalysts which promote the addition of Si-bonded hydrogen atoms to the vinyl groups and (4) an inert organic solvent. These coating compositions may be applied to cellulosic materials and other substrates to impart varying degrees of adhesive repellency thereto.

Process for preparing silicon-tin compounds

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Burghausen, Germany

Wolfgang Hechtl