Wacker-chemie Gmbh

Wacker Chemie Ag

Frank Achenbach

Armin Fehn

Herbert Barthel

Ernst Selbertinger

Andreas Koellnberger

Enno Funk

Georg Eberl

Christof W&ouml;rner

Christof Worner

Bernd Pachaly

Wolfgang Hechtl

Wolfgang Ziche

Michael Stepp

Siegfried Dormeier

Werner Brennenstuhl

Stefan Dietl

Otto Rothenaicher

Manfred Heisler

Norbert Egerter

Jochen Ebenhoch

Philipp M&uuml;ller

Christian Finger

John Young

Norbet Egerter

Andreas Köllnberger

Pius Tosch

Margot Kinne

Sabine Schreyer

Brigitte Ostermeier

Christof Wörner

Jelica Gegic

Birgit Schacherbauer

Hagit Ben-Daat Levin

A defoamer or anti-foam formulation and a process for preparing the same. The process includes in a first step, preparing branched organopolysiloxanes (A) by irradiating organopolysiloxanes (X) of the formula (1)R(RO)Si—[OSiR]—OSi(OR)R  (1).Where with high-energy radiation, the viscosity of the organopolysiloxanes (A) is at least 40% higher than the viscosity of the organopolysiloxanes (X). In a second step, the branched organopolysiloxanes (A) are treated with a filler (B) which is selected from precipitated and/or fumed silicas, and organopolysiloxane resins (C).

Antifoam compositions comprising branched siloxanes formed by treating linear siloxanes with high-energy radiation

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

A device for the dry cleansing of surfaces to remove particulates contains triboelectrically chargeable component(s) of an organic polymer material containing uniformly distributed finely divided silicone polymer particles.

Adsorption of particles on a material containing a silicone polymer

Vulcanizates produced by crosslinking of mixtures including alpha-functional polysiloxanes have high relative permittivities at high electric breakdown strengths which renders them suitable as a dielectric material for applications in actuators, generators or sensors in robotics, orthopedics, electrically controllable 'artificial muscles,' and transducers producing electricity from kinetic energy.

Cross-linkable mixtures having alpha-functional polysiloxanes

A temporary adhesive for reversibly bonding a silicon wafer to a silicon support contains a crosslinkable organopolysiloxanes composition and a fatty acid or salt thereof or fatty acid ester as a release regulator having a density different from the crosslinkable organopolysiloxanes composition of at least 0.1 g/cm, which upon parting of the wafer from the substrate, the adhesive remains substantially adhered to the substrate.

Temporary adhesion of chemically similar substrates

High strength silicone elastomers with enhanced physical properties are prepared from silicone polymers having ionic or organometallic functional groups, crosslinked through coulombic interactions and/or covalent bonds.

Ionically and/or organometallically functionalized silicone polymers crosslinkable to high-strength elastomers

The present invention relates to silicone rubber compositions and long-term-stress-resistant silicone elastomers obtained therefrom, which have excellent resistance to long-term dynamic mechanical stresses, and to their use.

Silicone rubber compositions and long-term-stress-resistant silicone elastomers obtained therefrom

Addition crosslinkable organopolysiloxane compositions which cure to organopolysiloxane elastomers of high elongation at break and high tear resistance contain a high viscosity, alkenyl-terminated, and substantially pendant alkenyl group-free organopolysiloxane, an organopolysiloxane having pendant alkenyl groups and optionally alkenyl-terminal groups, an Si&#x2014;H functional crosslinker, and a hydrosilylation catalyst.

Highly viscous silicone masses comprising alkenyl-terminated polydiorganosiloxanes which may be cross-linked by addition

Self-adhesive addition-crosslinking silicone compositions

Curable organopolysiloxane materials

The invention relates to a method for producing Si&mdash;H containing siliconimides by achieving balanced proportions of organosilicon compounds containing Si&mdash;H groups, in siliconimides. It also relates to siliconimides containing Si&mdash;H groups and their applications as Si&mdash;H comb-crosslinking agents, as a constitutional unit for spread coating paper or electrical components, in adhesive material, moulding material, film material, coating material, laminated material, tough elastomers and composite matrix material.

Siliconimides containing Si-H groups

In a continuous process for producing filler-containing silicone compositions (P), a silicone composition (E) comprising filler (F1) is mixed with filler (F2).

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Simbach, Germany

Frank Achenbach