Wacker-chemie Gmbh

Wilhelm Marsch

Dietrich Wolfer

Karl-Heinrich Wegehaupt

Manfred Leiser

Willi Primas

Peter Gerhardinger

Max Proschkowitz

The invention relates to compositions which can be prepared from at least one polyorganosiloxane, boric acid and water, and which may serve as a pelletizing additive for crosslinkable silicone rubber formulations. A small proportion of the pelletizing additive, when added to a ore component crosslinkable silicone rubber, or to individual components of a two or more component silicone rubber formulation, allow production of free flowing pellets which retain storage stability for extended periods of time.

Silicone rubber

A composition which is useful for producing profiles and cable insulation which retain their function in the event of fire, comprise peroxidically crosslinking or condensation-crosslinking silicone rubber, metal oxides selected from magnesium oxide, aluminum oxide, tin oxide, calcium oxide and barium oxide and metal compounds of this class which produce oxides on heating, boric acid, zinc borate, and a platinum complex having at least one unsaturated group.

Silicone rubber compositions for producing cables or profiles with retention of function in the event of fire

Compositions which can be crosslinked to form flame retardant and/or tracking resistant and arc resistant organopolysiloxane elastomers which comprises adding to a cross-linkable organopolysiloxane an additive which is obtained by mixing

Compositions which can be crosslinked to form flame retardant and/or

Organopolysiloxane compositions which can be cured to form elastomers and contain:

Adhesive organopolysiloxane composition which can be cured to form an

A process for preparing moldings or coatings by compression molding, transfer molding or injection molding from materials which contain free-radical generators and an organopolysiloxane which can be crosslinked to form organopolysiloxane elastomers, in which the free-radical generators comprise at least one free-radical generator having a half-life in benzene of 1 minute at 60.degree. C. to 149.degree. C. and at least one free-radical generator having a half-life in benzene of 1 minute at 150.degree. C. to 200.degree. C. Other materials which may be molded are those which can be crosslinked by the addition reaction of Si-bonded hydrogen with SiC-bonded vinyl groups and also contain at least one free-radical generator.

Process for preparing moldings or coatings

An electrically conductive composition containing a cross-linked organopolysiloxane and an electrically conductive lamp black in which the electrically conductive lamp black comprises from 15 to 60 percent by weight based on the weight of the organopolysiloxane of furnace black having a surface area of from 40 to 100 m.sup.2 /g and from 5 to 25 percent by weight of acetylene black based on the weight of the organopolysiloxane.

Electrically conductive organopolysiloxane elastomers

The invention relates to adhesive compositions comprising vinyl containing organopolysiloxanes, organopolysiloxanes having Si-bonded hydrogen atoms and catalysts which promote the addition of the Si-bonded hydrogen atoms to the vinyl groups. These adhesives may be combined with other electrically conductive materials and used in connecting flexible heating resistors to electrodes.

Growing community of inventors

Haiming, Germany

Wilhelm Marsch