Wacker Chemie Ag

Wacker-chemie Gmbh

Siegfried Dormeier

Christian Herzig

Ernst Selbertinger

Torsten Gottschalk-Gaudig

Frank Achenbach

Anton Heller

Werner Brennenstuhl

Klaus Eller

In an additive 3D printing method for production of shaped articles from silicone elastomers, an elastomeric shaped body is built up step by step, by repeatedly precisely positioning portions of the crosslinkable silicone material and crosslinking by means of electromagnetic radiation. Charges that occur on the surface of the print material or on the article are neutralized by means of an ionization system.

Method for producing silicone elastomer articles with elevated print quality

A generative process for the manufacture of three-dimensional mouldings is characterized by constructing the moulding stepwise by site-specific delivery of a structure-forming material in liquid form, where a second material is additionally delivered as a supportive material into regions which are intended to remain free from the structure-forming material, and is removed once the structure-forming material has been solidified. The supportive material exhibits low shrinkage upon cooling and is particularly stable in the cooled state and further exhibits low surface roughness.

Method for producing shaped bodies

3D printing of curable silicone cam positions is made possible by employing a mixture of Si&#x2014;H-functional silicon compounds and silicon compounds bearing aliphatically unsaturated groups, a hydrosilylation catalyst, and a combination of a reinforcing filler and a rheological agent containing polar groups, exhibiting shear thinning behavior.

Silicone compositions for producing elastomeric molded parts by means of ballistic methods

Polysiloxanes containing both epoxy groups and quaternary ammonium groups bonded to the polysiloxane through ring-opened epoxy groups provide a soft hand and wash fastness to fibrous substrates.

Organopolysiloxanes containing quaternary ammonium groups, the production and use thereof

Organosilicon compounds containing &#x3b2;-ketoamide groups and organic polymer groups bound via enamine bonds are prepared by reaction of compounds bearing at least one &#x3b2;-ketocarbonyl functionality with organosilicon compounds bearing aminoalkylaminoalkyl groups. The products have the same uses as siloxanes containing polyether and acetoacetate groups.

Organosilicon compounds that contain &#x3b2;-ketoamide groups and organic polymers bound via enamine bonds, and method for producing them

Emulsions of highly viscous organopolysiloxanes are prepared by reacting organopolysiloxanes having at least one Si&#x2014;OH group with alkoxysilanes bearing a group BRSi(OR)wherein R is a hydrocarbon radical and B is a radical &#x2014;CR&#x2014;Y where Y is halogen, monosubstituted O or S or substituted N or P, the reaction taking place as a dispersion in water, optionally in the presence of an emulsifier.

Method for the production of emulsions of highly-viscous organopolysiloxanes

Easily emulsified hydrophilic copolysiloxanes may be prepared by hydrosilylation employing an Si&#x2014;H-functional organosiloxane with a compound containing both a hydrosilylatable group and an active hydrogen, and reacting the intermediate thus formed with a di- or polyisocyanate, wherein the reactants employed to produce the intermediate contain less than 2000 ppm water.

Hydrophilic copolysiloxanes and method for the production thereof

Process for preparing highly viscous organopolysiloxanes by reacting siloxanes (1) composed of units of the general formula where wherec+d is &#x2266;3 and one Rradical is hydrogen is present,with silanes (3)BRSi(OR)&#x2003;&#x2003;(III)whereB is a radical &#x2014;CR&#x2014;Y,Ris hydrogen or Calkyl,Y is halogen, a monosubstituted O and S atom, or a substituted N or P atom,Ris Calkyl, ande is 0, 1 or 2.

Process for preparing highly viscous organopolysiloxanes

Pastes comprise (1) siloxane copolymers which contain at least two groups of the general formula&#x2014;C(O)NR&#x2014;in covalently bonded form on average per molecule, where Ris a hydrogen atom or an alkyl radical having 1 to 18 carbon atoms and (2) organic compound(s) with a melting point greater than 0&#xb0; C. which are dispersed in the siloxane copolymers (1) and contain at least one group which participates in the formation of hydrogen bridges with the &#x2014;C(O)NRgroups in (1). The pastes are useful for numerous purposes, for example as hydrophobicizing compositions.

Growing community of inventors

Stubenberg, Germany

Siegfried Dormeier