Wacker-chemie Gmbh

Stefan Oberneder

Wolfgang Hechtl

Norman Dorsch

Michael Stepp

Karl Braunsperger

Oswin Sommer

Rudolf Braun

Erich Pilzweger

Rudolf Heinrich

Robert Braunsperger

Herbert Sollradl

Herbert Soellradl

Alfred Heinrich

Doris Filusch

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

Cross-linkable organopolysiloxane materials formed into elastomers by separating alcohols

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

Aqueous dispersions of organopolysiloxanes comprising (A) an organopolysiloxane containing groups which are capable of condensation, (B) a condensation catalyst, (C) an organopolysiloxane resin which is at least partly soluble in organopolysiloxane (A) when present in amounts of up to 50% by weight based on the weight of (A), (D) a compound containing basic nitrogen and (E) polyvinyl alcohol. The aqueous dispersions are prepared by dissolving the organopolysiloxane resin (C) in the organopolysiloxane (A) and then emulsifying the solution with polyvinyl alcohol (E) and water. The stable aqueous dispersions of the present invention cure to form transparent films.

Aqueous dispersions of organopolysiloxanes

Organopolysiloxane compounds cross-linkable by cleaving of alcohols to

A process for the preparation of organopolysiloxanes which contain at least one unit of the formula

Process for the preparation of organopolysiloxanes containing organyloxy

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Burghausen, Germany

Stefan Oberneder