Abstract: Disilazanes having sulphur atoms attached to the silicon atoms through divalent aliphatic hydrocarbon radicals having from 2 to 6 carbon atoms. They are prepared by reacting a disilazane having olefinically unsaturated hydrocarbon radicals attached to the silicon atoms with a thiol, in the presence of a free radical generator. The disilazanes are useful as intermediates and for the treatment of particulate solids.

Abstract: A catalyst carrier substance which can be obtained by reacting an inorganic particulate solid having surface hydroxyl groups with an organosilicon compound containing sulphur. The carrier may be converted to a supported catalyst by reaction with a compound or complex of platinum or rhodium. The catalysts can be recovered and recycled and are useful in hydrogenation, hydroformylation and oligomerization reactions. They are of particular interest with respect to hydrosilylation reactions.

Abstract: Process for preparing an organosilicon product by the reaction of a silicon compound having SiH groups with an organic or organosilicon compound having aliphatic unsaturation in the molecule. The process is carried out in the presence of, as catalyst, a compound or complex of platinum or rhodium and also in the presence of a cobalt salt of a monocarboxylic acid. The cobalt salt improves the catalytic performance of the compound or complex of platinum or rhodium.

Abstract: Method for imparting resilience and crease resistance to synthetic fibers, particularly knitted fabrics, by applying to the fibers a composition obtained by mixing a hydroxylated polydiorganosiloxane, an organosilane having amino and alkoxy or alkoxyalkoxy groups in the molecule and an organosilane having alkoxy or alkoxyalkoxy groups and hydrogen atoms, monovalent hydrocarbon or halogenated hydrocarbon groups in the molecule. Partial hydrolysates of the silanes may optionally be used. The applied composition is then cured at normal or elevated temperatures.

Abstract: Process for coating a surface with an organosiloxane composition to render it non-adherent. The organosiloxane composition is substantialy solvent-free, has a viscosity not exceeding 4,000 cS at 25.degree.C and comprises (1) a polydiorganosiloxane having silicon-bonded vinyl radicals (2) an organohydrogenpolysiloxane and (3) a catalyst which isRhX.sub.3 (SR.sub.2).sub.3orRh.sub.2 (CO).sub.4 X.sub.2in which X is halogen, preferably chlorine, and each R is alkyl, aryl, aralkyl, alkaryl or R'.sub.3 SiQ wherein Q is a divalent aliphatic hydrocarbon radical and R' is alkyl, aryl, aralkyl or alkaryl or (CH.sub.3).sub.3 Si-. After application the composition is cured.

Abstract: Method for bonding a room temperature vulcanisable silicone rubber to a porous substrate of masonry or wood. The method involves applying to the porous substrate a primer composition comprising a cyclised rubber resin, an organic solvent and a film-forming polyester resin in a proportion of from 0 to 40% by weight based on the weight of cyclised rubber resin. The primed surface is dried and a room temperature vulcanisable silicone rubber composition of specified type then applied.