Abstract: The gully closure for preventing the pollution of bodies of water in accident situations consists of a flexible mat (1) which covers the gulley surface and is coated with a highly viscous, free-flowing moulding composition (2). A plastically deformable silicone gel has proved particularly successful as a free-flowing moulding composition (2).

Abstract: In a polysiloxane rubber composition which vulcanizes under heat to form an elastomer and comprising(a) a polyorganosiloxane containing unsaturated radicals,(b) a compound containing Si-H groups,(c) a platinum-containing addition catalyst, and(d) an organic peroxide, the improvement which comprises(e) a compound capable of forming a complex ligand with platinum, whereby the storability of the composition is improved.

Abstract: A process for the production of polymeric organosiloxanes comprising reacting diorganosiloxanes with substances regulating the chain length in the presence of alkaline and/or acid reaction catalysts and wherein the polymerization takes place in a reactor consisting of several zones and is provided with stirring or conveying elements, the arrangement of the stirring or conveying elements being such that the flow of material produced by the stirring or conveying element in each zone is the opposite of that in the adjacent zone or zones.

Abstract: 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, andC. about 1 to 10 parts by weight of a cross-linking agent of the formulaRSiX.sub.3whereinR is an alkyl, halogenoalkyl, aryl, or arylalkyl radical, andX is an alkoxy, acyloxy, oximato or alkylamino radical.A curing catalyst may also be present. The composition is clear as are the silicone rubbers produced upon curing.

Abstract: A process for the preparation of an organopolysiloxanol comprising contacting at least one organochlorosilane of the formula(CH.sub.3).sub.a (C.sub.2 H.sub.5).sub.b (CH.sub.2 = CH --).sub.c SiCl.sub.4-a-b-cWhereina, b and c is 0, 1, 2 or 3And wherein2 .ltoreq. a+b+c .ltoreq. 3At a temperature of about -10.degree. to 90.degree.C with water containing NH.sub.4 Cl in an amount from 1 to 100 percent of its saturation concentration, the pH value of the aqueous solution being adjusted to between about 7.5 and 11.6 by introduction of NH.sub.3, separating the hydrolyzate from the aqueous solution immediately after hydrolysis, and flushing the hydrolyzate with an inert gas, to remove NH.sub.3 therefrom.