Abstract: The invention relates to coating mixtures, containing in the anhydrous state at least one polysiloxane, at least one reactive inorganic filler, at least one inorganic material which is film-forming as melt and at least one reactive (oligo)silane, a process for manufacture and their use.

Abstract: Novel liquid organopolysiloxane resins of the average composition[R.sup.1 Si(CH.sub.3).sub.2 O.sub.1/2 ].sub.a [(CH.sub.3).sub.3 SiO.sub.1/2 ].sub.b [R.sup.2 O.sub.1/2 ].sub.c [R.sup.1 Si(CH.sub.3)O].sub.d [(CH.sub.3).sub.2 SiO].sub.e [SiO.sub.2 ],whereinR.sup.1 is a C.sub.2 -C.sub.8 -alkenyl group,R.sup.2 is an optionally substituted, linear or branched C.sub.1 -C.sub.8 -alkyl group or a mixture thereof,a+b+c+d+e is about 1 to 6,d+e is about 0 to 3,the resin has a viscosity of 0.1 to 1000 Pas at 25.degree. C., andthe alkenyl or vinyl content of the resin is in the range of 0.4 to 4 mmol/g,and their preparation by reacting at least one of tetraalkoxysilane and its partial hydrolyzate with at least one organosiloxane and a strong acid as catalyst in the presence of water and optionally an organic solvent at a temperature of about >40.degree. C. They are formulated into novel low viscosity polydiorganosiloxane compositions.

Abstract: An organopolysiloxane composition that can be crosslinked by addition, comprisinga) a branched organopolysiloxane having unsaturated hydrocarbon groups, and triorganosiloxy end unitswherein at least 90% of the organo groups are methyl groups,the number average molecular weight of which is on average from 9,000 to 60,000,wherein the ratio of the number of diorganosiloxy units (D-units) to the number of branch points is on average between 15 and 40, andwherein at least one triorganosiloxy unit (M-unit) and at maximum half of all the M-units are free of unsaturated radicals, the remaining M-units each have only one unsaturated radical and the content of unsaturated radicals is from 0.

Abstract: Process for preparing non-aqueous dispersions, wherein a liquid prepolymer is emulsified in a non-aqueous liquid, the droplet size of the emulsion is adjusted to 0.1 to 30 .mu.m and the droplet size distribution U.sub.90 is adjusted to less than 2 by means of a jet disperser, and the droplets are cured by a chemical reaction.

Abstract: Novel liquid organopolysiloxane resins of the average composition ?R.sup.1 Si(CH.sub.3).sub.2 O.sub.1/2 !.sub.a ?(CH.sub.3).sub.3 SiO.sub.1/2 !.sub.b ?R.sup.2 O.sub.1/2 !.sub.c ?R.sup.1 Si(CH.sub.3)O!.sub.d ?(CH.sub.3).sub.2 SiO!.sub.e ?SiO.sub.2 !,whereinR.sup.1 is a C.sub.2 -C.sub.8 -alkenyl group,R.sup.2 is an optionally substituted, linear or branched C.sub.1 -C.sub.8 -alkyl group or a mixture thereof,a+b+c+d+e is about 1 to 6,d+e is about 0 to 3,the resin has a viscosity of 0.1 to 1000 Pas at 25.degree. C., andthe alkenyl or vinyl content of the resin is in the range of 0.4 to 4 mmol/g,and their preparation by reacting at least one of tetraalkoxysilane and its partial hydrolyzate with at least one organosiloxane and a strong acid as catalyst in the presence of water and optionally an organic solvent at a temperature of about >40.degree. C. They are formulated into novel low viscosity polydiorganosiloxane compositions.

Abstract: In the chain extension of a low molecular weight .alpha.,.omega.-dihydroxypoly(diorganosiloxane) wherein the siloxane is contacted with a chain extension catalyst, the improvement wherein said catalyst comprises at least one phosphoric acid ester, orthophosphoric acid, or a salt thereof. The reaction proceeds rapidly and, when complete, the catalyst can easily be deactivated to prevent degradation and/or rearrangement.

Abstract: The present invention relates to a process for preparing alkyl halosilanes by reacting a contact material which comprises, in addition to silicon, at least one copper-containing compound as catalyst and at least one promoter, with an alkyl halide.