Abstract: In the preparation of multi-branched equilibrated mixed acyloxy-containing and chlorine-containing organo polysiloxanes by reacting a chlorosilane of the formulaR.sub.a SiCl.sub.4-awhereina=0 or 1,with at least one organosiloxane containing units of the formulaR.sub.2 R'SiO.sub.1/2, RR'SiO, R'SiO.sub.3/2 and/or SiO.sub.2whereinR is hydrogen or an aliphatic, aromatic, saturated or unsaturated, optionally halogen-substituted or cyano-substituted monovalent hydrocarbon radical with up to 8 C atoms andR' is chlorine, hydroxyl, hydrogen or an aliphatic, aromatic, saturated or unsaturated, optionally halogen-substituted or cyano-substituted monovalent hydrocarbon radical with up to 8 C atoms,in proportions such that the number of all the SiCl groups is always at least 1.5 times greater than the number of SiOH groups, in the presence of (a) fluoroalkanesulphonic acid or salt thereof and (b) relative to the chlorine atoms bonded to silicon, at least 1.

Abstract: Graft polymers having improved low temperature characteristics of optionally partially or completely saponified vinyl ester homopolymers or copolymers as graft substrates and grafted siloxane units.

Abstract: In the addition of an unsaturated compound into a silane of the formulaR.sub.1 R.sub.2 SiXHwhereinX is Cl or Br, andR.sub.1 and R.sub.2 each independently is an alkyl, aryl or aralkyl radical with up to 20 C atoms, or an alkenyl or alkinyl radical with up to 12 C atoms,the improvement which comprises effecting the addition reaction in the presence of at least one of aluminum chloride, aluminum bromide, aluminum oxychloride and aluminum oxybromide.

Abstract: In the preparation of catalytic copper with an average particle size between about 0.1 and 100 microns and a copper-I oxide content of about 3 to 100% by oxidation of a Cu powder, the improvement which comprises carrying out the oxidation with oxygen at a reduced partial pressure compared with that of air, the resulting catalyst being of enhanced catalytic activity especially for the reaction of hydrocarbon chlorides with silicon for the production of organochlorosilanes (Rochow synthesis) wherein the desired material is produced in higher yield and greater selectivity.

Abstract: Polycarbodiimide is present as a solid phase in a liquid polyorganosiloxane, preferably being formed therein by mixing a polyisocyanate with the polysiloxane followed by a carbodiimidization catalyst. If the polyorganosiloxane contains hydroxyl groups it can be chemically bonded to the polycarbodiimide. The composition can be cured to solid plastic masses of superior properties by adding a curing agent for the polysiloxane.

Abstract: A process for the preparation of a perfluoroalkanesulphonic acid ester of the formulaC.sub.n F.sub.2n+1 SO.sub.3 Si R.sup.1 R.sup.2 R.sup.3comprising reacting a silane of the formulaR.sup.1 R.sup.2 R.sup.3 R.sup.4 Siwith a perfluoroalkanesulphonic acid of the formulaC.sub.n F.sub.2n+1 SO.sub.3 HwhereinR.sup.1, R.sup.2 and R.sup.3 each independently is alkyl with 1 to 6 carbon atoms,R.sup.4 is methyl, andn is from 1 to 12.Compounds wherein the total number of carbon atoms in Cn, R.sup.1, R.sup.2 and R.sup.3 is at least 6 are new and especially useful as silylating agents in organic cyntheses.

Abstract: Polyurethane is present as a solid phase in a liquid polyorganosiloxane, preferably being formed therein by mixing a polyhydroxy-containing material with the polysiloxane followed by addition of a polyisocyanate. If the polyorganosiloxane contains hydroxyl groups it can be chemically bonded to the polyurethane. The composition can be cured to solid plastic masses of superior properties by adding a curing agent for the polysiloxane.

Abstract: A process for the preparation of a silane of the formulaR.sub.a SiH.sub.b (OR').sub.4-(a+b)whereinR is optionally substituted alkyl, alkenyl or aryl with up to 7 C atoms,R' is alkyl with 1 to 4 C atoms,a and b each independently is 1, 2 or 3, anda+b is at most 4,comprising reacting an Si-H polysiloxane with a compound of the formulaR.sub.a Si(OR').sub.4-ain the presence of a conventional redox-stable siloxane polymerization catalyst which favors the exchange reaction. Advantageously the catalyst is AlCl.sub.3 and R and R' are methyl, ethyl, vinyl or phenyl.

Abstract: A process for the preparation of an equilibrated acyloxy-containing organopolysiloxane comprising reacting at a temperature of up to 135.degree. C. a chlorosilane of the formulaR.sub.a R'.sub.b SiCl.sub.(4-a-b)whereina=0, 1, 2 or 3b=0, 1, 2 or 3, anda+b is at most 3,or a partial hydrolysis product thereof, with at least one organosiloxane containing the units[R.sub.2 R"--SiO.sub.178 ] [RR"--SiO] [R"--SiO.sub.3/2 ] [SiO.sub.2 ]whereinR and R' each independently is hydrogen or an optionally halogen or cyano-substituted monovalent hydrocarbon radical with up to 18 C atoms, andR" is hydrogen, chlorine, hydroxyl, or an optionally halogen or cyano-substituted monovalent hydrocarbon radical with up to 18 C atoms,in the presence of a proton acid siloxane-equilibration catalyst, and at least about 1.1 times the molar amount of a monobasic carboxylic acid based on the silicon-bonded chlorine atom, the number of all the Si--Cl groups in the reactants exceeding the number of all the Si--OH groups.

Abstract: A chlorosilane or partial hydrolysis product thereof is reacted with a siloxane and stable polymeric products of comparatively high molecular weight or high chlorine content are produced by effecting the reaction in the presence of a siloxane protonic acid equilibration catalyst in combination with a hydrogen halide acid. The hydrogen halide acid may be produced in situ. Representative protic acid equilibration catalysts include sulfuric acid, oleum, polysulfuric acids, sulfonic acids including aromatic, alkyl and perfluoroalkyl sulfonic acids, and polysulfonic acids.

Abstract: This invention relates to a process for the making of cold-hardening foams containing urethane groups by in-mold foaming. The need to use a relatively large number of additives like emulsifiers, stabilizers and activators can be eliminated by using certain silicon compounds of a specific formula. Foamable reaction mixtures using these compounds with polyethers, polyisocyanates, water and/or organic blowing agents, and catalysts will produce foams with properties acceptable for use in upholstery, cars, and furniture.