Wacker-Chemie Gmbh

Siemens Aktiengesellschaft

Dietrich Wolfer

Wilhelm Marsch

Jorg Patzke

Carlos Weise

Erhard Bosch

August Schiller

Hanns-Heinz Peltz

Peter Gerhardinger

Reinhard Maier

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

Organopolysiloxane compositions prepared from an organopolysiloxane and a crosslinking agent comprising bis-4-methylbenzoyl peroxide (PMBP) and at least one compound from the group consisting of benzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-hexane-2,5-di-tert-butyl peroxide (DHBP) and di-tert-butyl peroxide exhibit less tendency to yellow upon vulcanization, and can produce tear resistant, substantially odor free vulcanizates.

Combination crosslinking agent for vulcanization of silicone rubber under normal pressure

Compositions for coating the surface of electrical high-voltage insulators, which are stable on storage in the absence of water and can be crosslinked to form elastomers at room temperature when exposed to water comprising

Compositions suitable for coating the surface of electrical high-voltage

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

An electrically conductive adhesive having elasticity over a wide temperature range of approximately -60.degree. C. to about 180.degree. C. for securing sensitive electronic components to a foundation is provided.

Electrically conductive adhesive for a broad range of temperatures

Flame-resistant molding compositions are prepared by adding at least one substance selected from the class consisting of (a) oxides or hydroxides of the rare earth metals, (b) graphite, or (c) precious metals or their compounds or complexes and mixtures of (a), (b) or (c) to a composition containing mixtures of organic polymers other than diorganopolysiloxanes and diorganopolysiloxanes. Although it is not essential, silicon dioxide having a surface area of at least 50 m.sup.2 /g and crosslinking agents may be incorporated in these molding compositions.

Flame-resistant molding compositions containing oxides or hydroxides of

Flame-retardant elastomers are prepared by adding a metal hydroxide and/or a hydrate of a metal oxide and graphite to an organopolysiloxane composition which is capable of being crosslinked to form an elastomer.

Flame-retardant polysiloxane elastomers

Flame-resistant molding compositions

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.

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Oberndorf, Austria

Dietrich Wolfer