Wacker Chemie Ag

Ernst Selbertinger

Frank Achenbach

Mark Robert Sivik

Nicholas David Vetter

Richard Becker

Wolfgang Ziche

Franz X Wimmer

Kristi Lynn Fliter

Markus Merget

Siegfried Dormeier

Patrick Brian Whiting

Harry William Broening

Stefanie Schuster

Bernd Pachaly

Christof Brehm

Juergen Pfeiffer

Werner Brennenstuhl

Gerhard Beer

Markus Grandl

Jürgen Pfeiffer

Klaus Eller

Werner Limmer

Franz Xaver Wimmer

Johannes Zirzlmeier

An aqueous dispersion includes precrosslinked organopolysiloxanes, emulsifiers, and water. The precrosslinked organopolysiloxanes include units of the formula RSiO(I), and on average at least one structural unit of the formula SiRO—Y—SiRO(III) where Y is a divalent radical of the formula —R—[NR—R—]NR—C(O)—C(O)—NR—Z—NR—C(O)—C(O)—NR—[R—NR—]R—.

Aqueous dispersions of amino-functionalized organopolysiloxanes pre-crosslinked with oxalatopolyethers

An aqueous of pre-crosslinked organopolysiloxanes and process for producing the same. The aqueous dispersion is preferably aqueous emulsion, including pre-crosslinked organopolysiloxanes which contains on average at least one structural unit of the general formula SiRO—Y—SiROand units of the formula RSiO. Where Y is a radical of the formula—R—[NR—R—]—NR—OC—[C(Z)(H)]—[C(Z)(H)]—CO—NR—[R—NR]—Rand where R, R, R, R, k1, k2, x, Zand Zhave a definition a set forth within herein. Additionally, the sum of k1+k2 is ≥1, the that at least one radical Zor Zis a hydroxyl or NHRgroup, preferably a hydroxyl group, and so the bridging group Y contains at least one hydroxyl or NHRgroup, preferably at least one hydroxyl group.

Aqueous dispersions of pre-crosslinked organopolysiloxanes

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

Curable silicone rubber compositions of high viscosity can be ballistically printed if the melt flow index is within a defined shear thinning range and the viscosity is also within a defined range.

Highly viscous silicone compositions for producing elastomeric molded parts by means of ballistic generative methods

Complex shaped bodies of silicone are produced by ballistic 3D DOD printing by employing a silicone resin-based composition curable by hydrosilylation, which exhibits a high shear thinning behavior and a rapid viscosity recovery rate alter removal of shear.

Cross-linkable silicone compositions for producing highly transparent molded parts by means of ballistic methods

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

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

Process for making an aminosiloxane polymer nanoemulsion

Amino group-containing organosilicon compounds containing no or only a small fraction of Si-bonded hydroxyl groups are prepared by preparing an organosilicon compound containing amino groups and Si-bonded hydroxyl groups by equilibration in the presence of an equilibration catalyst, and reacting the resultant product with a cyclic silazane. The products are particularly useful as a monomer or macromere for the preparation of high molecular weight organic polymers containing organosilicon blocks.

Method for producing organosilicon compounds having amino groups

The invention relates to moisture-crosslinkable organopolysiloxane-polyurea block copolymers, to a process for preparing the crosslinkable organopolysiloxane-polyurea block copolymers, and to their use; to crosslinkable compositions comprising the crosslinkable organopolysiloxane-polyurea block copolymers, to the preparation of the crosslinkable compositions, to their vulcanization, and to the use of the vulcanizates.

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Burghausen, Germany

Ernst Selbertinger