Bayer Aktiengesellschaft

Hans Joachim Lucking

Gunther Maass

Hans Sattlegger

Karl-Heinz Rudolph

Werner Buchner

Hans-Heinrich Moretto

Bruno Degen

Karl Brandle

Klaus Seyfried

The present invention relates to a process for the preparation of trioganosilyl-terminated polydiorganosiloxanes by basic polymerization of cyclic diorganopolysiloxanes and triorganosilyl-terminated siloxanes, wherein, before the polymerization, a part of the cyclic diorganosiloxane is distilled off in the presence of the polymerization catalyst at a temperature which is at least 10.degree. C. below the polymerization temperature.

Preparation of polydiorganosiloxanes having terminal triorganosilyl

In a plastic organosiloxane molding composition which in the absence of water is capable of being stored and in the presence of moisture is cross-linked to a rubber, the composition comprising a hydroxypolydiorganosiloxane, a nitrogen base and heavy metal compound as cross-linking catalyst, and a cross-linking agent, the improvement which comprises employing as the cross-linking agent a compound of the formula ##STR1## or a partial hydrolysis product thereof, wherein R is an optionally substituted alkyl, alkenyl or aryl group,

Storable crosslinkable organopolysiloxane molding compositions

In the preparation of cyclic and linear organosiloxanes by reacting an organohalogenosilane with a compound of the formula

Preparation of organosiloxanes

A polysiloxane composition which can be cross-linked under atmospheric conditions and which consists essentially of: A. 100 parts by weight of an .alpha.,.omega.-dihydroxymethylphenylpolysiloxane with about 7-15 mole % of diphenylsiloxy units or about 14-28 mole % of methylphenylsiloxy units, and having a viscosity of between about 1,000 and 500,000 cSt (at 20.degree. C), b. about 1 to 40 parts by weight of an uncoated reinforcing filler consisting essentially of SiO.sub.2 having a specific surface area of about 40 to 500 m.sup.2 /g by the BET method, and C. about 1 to 10 parts by weight of a cross-linking agent of the formula

Transparent storage-stable polysiloxanes which cross-link under

A process for the preparation of an organopolysiloxanol comprising contacting at least one organochlorosilane of the formula

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Bergisch-Neukirchen, undefined

Hans Joachim Lucking