Wacker-chemie Gmbh

Wacker Chemie Ag

Enno Funk

Frank Achenbach

Bernward Deubzer

Herbert Barthel

Michael Geck

Gerhard Preiner

Frank Sandmeyer

Georg Loessel

Norbert Egerter

Petra Stinglhammer

Martin Lex

Sabine Schreyer

Christine Kuermeier

Georg Lössel

Addition-crosslinkable silicone resin compositions containing a branched organopolysiloxane bearing each of Si&#x2014;H groups, alkenyl groups, and aryl groups, and also containing blocks of linear organopolysiloxane free of Si&#x2014;H and alkenyl groups with a chain length of at least three siloxy groups, and further bearing at least one aryl group, serve as excellent potting compositions for electronic devices, particularly LEDs, with high refractive index and optical transmittance, and wide processing latitude.

Silicone resin composition for optical semiconductors

Polyorganosiloxane compositions which are crosslinkable by means of hydrosilylation have improved compression set due to the incorporation of 3-amino-1,2,4-triazole-5-thiol bonded to silica.

Addition-crosslinking silicone composition with low compression set

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 invention relates to aqueous emulsions containing (A) organo-hydrogenated polysiloxanes optionally mixed with organopolysiloxanes free of Si linked hydrogen and organyloxy groups, (B) organopolysiloxanes containing organyloxy groups as stabilizers, (C) emulsifiers and (D) water.

Aqueous emulsions containing organohydropolysiloxanes

Aqueous organopolysiloxane emulsions, especially those which can be crosslinked by addition of Si-bonded hydrogen onto aliphatic multiple bond, their preparation with an emulsifier combination comprising alkylphenyl polyglycol ether and polyvinyl alcohol with a low degree of hydrolysis, and their use for preparing anti-adhesive coatings.

Aqueous organopolysiloxane emulsions and emulsifiers for their

Organopolysiloxane compositions which are stabilized to heat and can be crosslinked to give elastomers, which as stabilizer combination contain (D) a copper compound in an amount from 1 to 180 ppm by weight calculated as elemental copper and (E) a zinc compound in an amount of from 1 to 180 ppm by weight calculated as elemental zinc, in each case based on the total weight of the organopolysiloxane composition which is stabilized to heat and can be crosslinked to give elastomers, and (F) optionally, organic fatty acid.

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Mehring, Germany

Enno Funk