Wacker-chemie Gmbh

Consortium Fur Elektrochemische Industrie Gmbh

Wacker Chemie Ag

Bernd Pachaly

Volker Frey

Wolfram Schindler

Wilfried Kalchauer

Andreas Bauer

Norbert Zeller

Volker Stanjek

Herbert Straussberger

Oliver Schäfer

Willi Streckel

Oliver Sch&auml;fer

Uwe Scheim

Gilbert Geisberger

Anton Schinabeck

Leonhard Brader

Thomas Kammel

Herbert Barthel

Frank Achenbach

Konrad Mautner

Oliver Schaefer

Peter John

Tassilo Lindner

Ernst Selbertinger

Werner Graf

Mario Heinemann

Rainer Winkler

Norbert Gamon

Ferdinand Pradl

Wolfgang Jacques

Sabine Delica

Gerhard Nagy

Lutz Roesch

Berthold Haefner

Robert Christa

Markus Reindl

Martina Chatzinerantzis

Volker Fey

Wolfgang Kohlmann

Herbert Jekat

Jochen Rauch

Markus Kriegbaum

Silicon elastomer articles are prepared by a 3-D printing process by depositing droplets of high viscosity curable silicone onto a substrate layer by layer from independently spatially controllable nozzles and irradiation with independently spatially controllable electromagnetic energy.

Method for producing silicone elastomer parts

Isocyanate-free foamable mixtures suitable for filling construction voids and for other uses, comprise isocyanate-free, alkoxysilane-terminated prepolymers (A) which have a silane end group of the formula [1], where

Isocyanate-free expandable mixtures exhibiting a fast hardening rate

One-component, moisture curing compositions which exhibit rapid curing, even with exceptionally low levels of catalyst or with no catalyst at all, can be formulated from alkoxysilane-terminated polymers having alkoxysilane groups bonded to an electronegative, free electron-pair-containing heteroatom via a methylene linking group. Polymer blends containing the alkoxysilane-terminated polymers exhibit rapid cure, even at room temperature, and allow the use of nitrogen containing components such as adhesion promoters.

Rapid-cure, one-component mixtures, which contain alkoxysilane-terminated polymers

Alkoxysilane-terminated polymers prepared by reacting an isocyanatoalkoxysilane, preferably an isocyanatodialkyalkoxysilane, with an isocyanate-reactive prepolymer, can provide chain extension even when a monoalkoxy-functional silane, while retaining suitable reactivity profiles. The products are useful in sealants, caulks, coatings, and moldings.

Cross-linkable polymer blends containing alkoxysilane-terminated polymers

Alkoxy-crosslinking one-component moisture curing compositions contain a polymer bearing (alkoxy)(methyl)silylalkyl-terminal groups, and specific silanes as described herein. The compositions exhibit improved shelf life and yet retain other desirable characteristics.

Alcoxy cross-linking, single-component, moisture-hardening materials

Crosslinkable RTV-1 compositions with enhanced physical properties include an alkoxy-functional polydiorganosiloxane having alkoxy-functional silyalkylene groups linked to a polydiorganosiloxane via ureaalkylene groups, prepared by reacting an &#x3b1;,&#x3c9;-dihydroxyorganopolysiloxane with a silazane and with a silane of formulaOCN&#x2014;X-SirR(OR), &#x2003;&#x2003;(6)where R, R, R, and Rare optionally substituted hydrocarbon groups.

RTV-1 silicone elastomer compositions which crosslink by means of alkoxy groups

Curable, silane-terminated polydiorganosiloxane-urethane copolymers exhibit the beneficial properties of isocyanate-terminated polysiloxane-urethane copolymers without the detriments associated with free isocyanate groups.

Silane-terminated polydiorganosiloxane urethane copolymer

The invention relates to moisture cross-linking compositions containing (A) 100 parts per weight of a silane-terminated polydiorganosiloxane-urea/urethane copolymer of general formula (1), and (B) between 0.1 and 20 parts per weight of silane of general formula (3): &#x3a9;-(CH)&#x2014;Si(R)(CH), in which R, X, A, Y, D, B, W, n, a, b, c, d, &#x3a9;, R, e and f are defined as per claim

Moisture crosslinking elastomer composition

Organopolysiloxane/polyurea/polyurethane block copolymer elastomers exhibiting improved physical properties are prepared by reacting diisocyanates with aminoalkyl-functional organopolysiloxanes containing substantially no cyclic siloxanes, prepared by reacting a cyclic silazane with a bis(hydroxy)-organopolysiloxane. Traditional hydroxyl and amino-functional chain extenders may be reacted as well, to produce a wide range of block copolymer elastomers.

Organopolysiloxane/polyurea/polyurethane block copolymers

Surface-modified solids bearing groups of the formula ISiR&#x2014;R&#x2014;NH&#x2003;&#x2003;(I),are prepared by reacting a solid having OH groups on a surface thereof with a cyclic silazane of the general formula IIwhere

Solids surface-modified with amino groups

The invention relates to a method for the production of hydroxyalkyl polysiloxanes of general formula (V) (SiO)(RSiO)(RSiO)(RSiO)[OSiR&#x2014;(CR)&#x2014;OH][OH](V), wherein organosiloxanes of general formula (VI) (SiO)(RSiO)(RSiO)(RSiO)[OH](VI) containing silanol are made to react with compounds having at least one unit of general formula (IV) [O&#x2014;(CR)&#x2014;SiR]&#x2014;(IV).

Method for the production of hydroxyalkyl polysiloxanes

The invention relates to a method for producing isocyanato-organosilane of general formula (I) R R R Si&mdash;R &mdash;N&boxH;C&boxH;O. According to said method, gaseous carbamato-organosilane of general formula (II) R R R Si&mdash;R &mdash;NH&mdash;CO&mdash;OR (II), wherein R represents a monovalent C -C alkyl radical, R represents a bivalent C -C hydrocarbon radical and R , R and R respectively represent a methyl, ethyl, n-propyl, i-propyl, methoxy, ethoxy, n-propoxy or i-propoxy radical, is heated in the presence of a heterogeneous catalyst.

Process for preparing isocyanatoorganosilanes

Preparation of alkylamines

Preparation of amino-functional siloxanes

Cyclic silazanes

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Burghausen, Germany

Bernd Pachaly