Abstract: A highly efficient method is provided for preparing secondary aminoisobutylalkoxysilanes by reacting hydridoalkoxysilanes with secondary methallylamines in the presence of a hydrosilation catalyst.

Abstract: A method is provided for preparing high purity organofunctional alkyldialkoxysilanes by reacting hydroalkyldialkoxysilanes with olefins wherein formation of undesired close-boiling by-products by an alkyl/alkoxy group exchange reaction is minimized.

Abstract: Aminosiloxanes bearing 4-amino-3,3-dialkylbutyl substituents are prepared by a multistep process including addition of 2,2-dialkylacetonitrile to vinylic siloxanes, hydrogenation of the nitrile adducts so formed to yield 4-amino-3,3-dialkylbutyl siloxanes, and optional equilibration of the latter with other siloxane sources, to form aminosiloxanes, which are useful for the treatment of textiles and fabrics and for the preparation of siloxane-containing block copolymers.

Abstract: Aminopolysiloxanes of the following structure Q.sub.2 RSiO-- (SiR.sub.2 O).sub.x -(SiRR.sup.1 O).sub.y -SiRQ.sub.2 wherein R is a monovalent hydrocarbon group having 1 to 10 carbon atoms including alkyl, aryl and aralkyl groups; R.sup.1 is CH.sub.2 --CH.sub.2 --C--(CH.sub.3).sub.2 --CH.sub.2 --NHR.sup.2, R.sup.2 is hydrogen, an alkyl of C.sub.1 -C.sub.6, an alkyl amine of C.sub.1 -C.sub.6, or an alkanolamine of C.sub.1 -C.sub.6 ; Q is R, R.sup.1, hydroxyl, or an alkoxy of C.sub.1 -C.sub.4. x can be zero or integer; y is an integer, with x+y being less than 1,100, for use in various applications, including softening textiles.

Abstract: A method for preparing chloroalkylalkoxysilanes by reacting an allylic chloride with a small molar excess of a hydromethoxysilane in the presence of a ruthenium catalyst and preferably in the substantial absence of an inert solvent.

Abstract: Sulfur-containing organosilicon compounds useful as coupling agents in vulcanizable rubbers to enhance various properties, including low rolling resistance for automobile tires, are prepared. Preferred compounds include .OMEGA.,.OMEGA.'-bis (trialkoxysilylalkyl) polysulfides. The compounds are prepared by reacting sodium ethoxylate with hydrogen sulfide gas to yield a sodium sulfide solution, and then reacting this product with a slurried mixture of elemental sulfur and chloropropyltriethoxysilane to form the compound 3,3'-bis (triethoxysilylpropyl) tetrasulfide. The use of hydrogen sulfide gas and sodium metal alcoholates provides an efficient and economical process.

Abstract: This invention provides a class of cyclic silylureas and a process of preparing them, which process comprises reacting a cyclosilazane with an isocyanate containing moiety; a class of cyclosilazanes and process for making them, which process comprises heating an aminoalkylalkoxysilane in the presence of a basic catalyst at a temperature less than 100.degree. C. at subatmospheric pressure; and aminoalkylalkoxysilanes and a process for making them, which process comprises reacting a nitrile and a vinylsilane while heating in the presence of a base selected from the group consisting (a) an alkali metal, (b) alkali metal alkoxide, (c) an alkali metal amide, (d) an alkali metal hydride and (e) mixtures thereof to form a reaction product which is subsequently hydrogenated.

Abstract: Novel tert-alkyl carbamate silicon compounds are provided which are useful as coupling agents. The compounds have the formulas: ##STR1## wherein the R groups can represent various hydrocarbon and other groups, n has a value of 1 to 10, b has a value of from 2 to 5 and a has a value of 1, 2 or 3.Processes are also provided for the preparation of the carbamate compounds and their use as coupling agents.

Abstract: Polysiloxanes containing both alkylhydrosiloxane units and alkylvinylsiloxane units which polysiloxanes are siloxy-endblocked that are useful as starting materials in the preparation of silicon oxycarbide ceramic compositions, a process for their preparation, a process for preparing silicon oxycarbide ceramic compositions therefrom, and novel silicon oxycarbide ceramic compositions are described.

Abstract: Novel tert-alkyl carbamate silicon compounds are provided which are useful as coupling agents. The compounds have the formulas: ##STR1## wherein the R groups can represent various hydrocarbon and other groups, n has a value of 1 to 10, b has a valueof from 2 to 5 and a has a value of 1, 2 or 3.Processes are also provided for the preparation of the carbamate compounds and their use as coupling agents.

Abstract: Polysiloxanes containing both alkylhydrosiloxane units and alkylvinylsiloxane units which polysiloxanes are siloxy-endblocked that are useful as starting materials in the preparation of silicon oxycarbide ceramic compositions, a process for their preparation, a process for preparing silicon oxycarbide ceramic compositions therefrom, and novel silicon oxycarbide ceramic compositions are described.

Abstract: Novel silanes having sterically hindered aminohydrocarbyl groups of the formula X.sub.3 SiRCR'.sub.2 NR".sub.2 and having utility as coupling agents and a process for their preparation are described.

Abstract: Novel silanes having sterically hindered aminohydrocarbyl groups of the formula X.sub.3 SiRCR'.sub.2 NR".sub.2 and having utility as coupling agents and a process for their preparation are described.

Abstract: Linear silicone-urethane copolymers which contain tertiary amine or quaternary ammonium groups on the polymer backbone of the general formula:{R'NR"SiMe.sub.2 (OSiMe.sub.2).sub.b OSiMe.sub.2 R"NR'CONHR"NHCO.sub.2 (Y)O.sub.2 CNHR"NHCO}wherein Me represents a methyl group; R' represents a hydrogen atom or a lower alkyl group having one to three carbon atoms; R" represents a divalent hydrocarbon group having at least three carbon atoms such as (CH.sub.2).sub.3-12 ; and Y represents (C.sub.z H.sub.2Z+1 N) where Z.gtoreq.5 and .ltoreq.22 and may be quaternized by use of a quaternizing agent R'X wherein X is selected from the group consisting of a halide atom, an acetate or higher carboxylate group, and an alkylsulfate group where the alkyl moiety has 1 to 12 carbon atoms and where R', R" and b may vary within each copolymer are described.

Abstract: This invention is concerned with novel polysilanes containing olefinic groups which are prepared by reactions of halogen-containing organosilane monomers or mixtures thereof with sodium metal in an appropriate solvent or mixture of solvents. Such polysilane polymers are soluble and thermoplastic, and can be directly converted to silicon carbide compositions by pyrolysis at atmospheric pressure.

Abstract: A method of preparing silazane polymers, with 3 or more repeating units, of the general formula--((CH.sub.3).sub.2 N).sub.e Si(R).sub.a (R'HN).sub.f H.sub.c (NR').sub.g --and a (CH.sub.3).sub.2 NH byproduct group where R is hydrogen, an alkyl group having 1-6 carbon atoms or an aryl group having 6-12 carbon atoms, a=0, or 1, b=2-4, C=0-2, d=0 or 1, e=0-2, f=0-2, g=1-3 and a+c+e+f+g=4 for the polymer units; and R' is hydrogen or methyl, whereby the silazane polymer is substantially free of halide impurities, and wherein this method comprises:transaminating an aminosilane of the general formula (R).sub.a ((CH.sub.3).sub.2 N).sub.b H.sub.c S; where R is defined as above and a+b+c=4 with an amine of the general formula (CH.sub.3).sub.d NH.sub.3-d whereby d is defined as above and the amine has a molecular weight lower than 45 all in the presence of an acid catalyst or the ammonium salt of the acid and thereafter condensing to form the polymer.

Abstract: In the process of preparing compounds containing silicon-carbon bonds by the hydrosilation reaction of a hydrosilyl reactant with an olefinic reactant in the presence of a soluble platinum catalyst, the improvement which comprises operating the process at a temperature below 150.degree. C. and employing, as a reaction promoter, a hydrosilyl compound whereby said hydrosilyl reactant has a composition different from the composition of said promoter and whereby said promoter provides (i) a 20% increase in the amount of silicon-carbon compounds, or (ii) a 20% increase in reaction rate relative to an unpromoted reaction.

Abstract: A novel branched hydrosilyl-modified polycarbosilane which can be pyrolized to obtain improved yields of silicon carbide. This novel branched hydrosilyl-modified polycarbosilane can be prepared in a one-step reaction from mixtures of silane monomers containing vinyl or halomethyl moieties with silane monomers containing hydrosilyl groups.

Abstract: Silicon carbide can be produced by the pyrolysis of branched polycarbosilanes which in turn are produced directly from selected monomer systems.

Abstract: A platinum catalyzed addition of allylamine and N-substituted allyl amines to trialkoxysilanes or alkylalkoxysilanes is improved by running the reaction under pressure at 110.degree.-210.degree. C. and in the presence of a reaction promoter. As a result, the time and the amount of platinum catalyst required for the reaction are significantly reduced and conversion and yield of the product increased.