Abstract: A process for preparing vinyl-tri-t-oxysilanes by reacting a tri-t-alkoxysilane with an alkyne in the presence of a platinum hydrosilation catalyst at a reaction temperature greater than 150.degree. C. forms a vinyl-tri-t-alkoxysilane in high yields and of high quality.

Abstract: Alkene oxide can be made in a simple, closed process that uses electrolysis to make bromine and hydroxide from bromide and water. The alkene reacts with bromine and then water to form an alkene bromohydrin, which is dehydrobrominated by hydroxide, regenerating bromide, to give alkene oxide.The main by-product in propylene oxide production is 1,2-dibromopropane, made by propylene reacting with bromine and then bromide. Since formation of 1,2-dibromopropane consumes propylene, electrical power, and bromide, which must be recovered, it is desirable to minimize its formation.It has been discovered that adding carbonate and/or bicarbonate to the bromide electrolyte reduces the formation of 1,2-dibromopropane independently of any pH effect.Carbonate/bicarbonate can be used to reduce formation of dibromo-compounds produced in epoxidation of other alkenes using the electrobromohydrin process.

Abstract: A process for preparing vinylaminosilanes in which an aminosilane of the formula HSi(NRR').sub.x (R").sub.3-x is reacted with an alkyne of the formula R"'C.tbd.CH in which R and R" are each saturated or unsaturated aliphatic hydrocarbon radicals or an aromatic hydrocarbon radical, R' and R"' are the same or different and are each hydrogen or R and x is an integer from 1 to 3, in the presence of a platinum hydrosilation catalyst at reaction temperatures above about 180.degree. C.

Abstract: Triacetoxysilanes are prepared by adding a tris(amino)silane to acetic anhydride and maintaining the reaction mix at a temperature no greater than about 50.degree. C.

Abstract: Method for producing decamethylcyclopentasiloxane (cyclic pentamer) from octamethylcyclotetrasiloxane (cyclic tetramer) by heating said cyclic tetramer in the presence of an aqueous hydrochloric acid solution and a salt of a protonated amine having at least one nitrogen-bonded monovalent hydrocarbon group having 5 to 14 carbon atoms.

Abstract: Novel coupling compositions for improving adhesion between an organic elastomer and an inorganic substrate comprise (A) an ethylenically unsaturated silane, having bonded to silicon, at least one hydroxy group and/or alkoxy group reactive with the inorganic substrate and at least one ethylenically unsaturated group polymerizable with the organic elastomeric matrix; (B) an organosiloxane oligomer, having bonded to silicon, at least one hydroxy and/or alkoxy group reactive with said inorganic substrate; and (C) optionally, an ethylenically unsaturated organosiloxane oligomer, having bonded to silicon, at least one ethylenically unsaturated group polymerizable with said organic elastomeric matrix.The novel curable compositions contain the novel coupling compositions, an organic elastomer, an inorganic filler, and a peroxide crosslinking agent.

Abstract: Combinations of oxirane compounds and acylamino or cyano silanes which are stable at room temperature when incorporated, either by integrally blending or pre-treatment onto fillers, into filled condensation polymer systems produce superior composites exhibiting hydrolytic stability. These combinations make excellent one-component additives for inorganic fillers employed in filled condensation polymer systems.

Abstract: Half-ester adducts and improved polymer-polyols, both useful in the production of polyurethane foams and other synthetic materials are provided, as well as synthetic end products. The half-ester adducts are produced by reaction between polyols and polycarboxylic compounds including dibasic carboxylic acids and dibasic carboxylic anhydrides.

Abstract: N-substituted aminoalkylsilanes are obtained via a selective process which comprises reacting a cyanoalkylsilane with a primary or secondary amine in the presence of a heterogeneous hydrogenation catalyst selected from the group consisting of rhodium, platinum and palladium.

Abstract: Polyorganosiloxanes that are curable to crosslinked solid material, at ambient temperature upon exposure to gaseous oxygen, wherein the polyorganosiloxane contains, per molecule, at least one monovalent olefinically polyunsaturated organic radical containing at least one 1,3-pentadienylene group or 1,4-pentadienylene group bonded to silicon through silicon-to-carbon bond and wherein any remaining valence of silicon is satisfied by a silicon-to-oxygen-to-silicon bond or by a monovalent organic radical free of more than one olefinically unsaturated group per monovalent organic radical, which monovalent organic radical is bonded to silicon by a silicon-to-carbon bond. Compositions are also described containing the novel polyorganosiloxanes, suitable driers either chemically combined in the polyorganosiloxane or physically mixed therewith. The compositions can also contain fillers, plasticizers and/or catalyst activators.

Abstract: Novel coupling compositions for improving adhesion between an organic elastomer and an inorganic substrate comprise (A) an ethylenically unsaturated silane, having bonded to silicon, at least one hydroxy group and/or alkoxy group reactive with the inorganic substrate and at least one ethylenically unsaturated group polymerizable with the organic elastomeric matrix; (B) an organosiloxane oligomer, having bonded to silicon, at least one hydroxy and/or alkoxy group reactive with said inorganic substrate; and (C) optionally, an ethylenically unsaturated organosiloxane oligomer, having bonded to silicon, at least one ethylenically unsaturated group polymerizable with said organic elastomeric matrix.The novel curable compositions contain the novel coupling compositions, an organic elastomer, an inorganic filler, and a peroxide crosslinking agent.

Abstract: Adducts and improved polymer-polyols, both useful in the production of polyurethane foams and other synthetic materials are provided, as well as synthetic end products. The adducts are produced by combining polyols and compounds having carboxylic carbon atoms and/or epoxy groups.

Abstract: An elastomeric silicone finish is prepared from a silicone system comprising a blend of silanols and crosslinable silicone intermediates. The blend is applied to the desired substrate and thereafter catalyzed and cured to obtain an elastomeric finish.

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

Abstract: Silicon based liquid crystal compounds produced by the reaction of an isocyanatosilane with a Schiff base, aromatic ester, azo compound or cholesteryl compound. The liquid crystals are useful in those applications in which liquid crystals are currently used and they also have the capability of being firmly chemically bonded to certain substrates, such as glass, thus avoiding the need for hermetic sealing.

Abstract: Silyl carbamates are produced by the reaction under suitable reaction conditions of silanes bearing at least one silicon-hydrogen bond of the formula: R.sub.4-x SiH.sub.x with an ammonium carbamate of the formula: R'R"NH.sub.2.sup..sym. R'R"NCO.sub.2.sup..crclbar.. This novel route is much simpler and more direct than those previously known and provides a new classes of silyl carbamates.

Abstract: Adducts, improved polymer-polyols and improved polyurethane foams are provided. The adducts are produced by reacting suitable polyol and epoxy co-reactant to essentially eliminate all epoxy groups. The polymer-polyol is produced by polymerizing suitable ethylenically unsaturated monomer in the adduct or in the adduct forming mixture; in the later case the adduct forming reaction and the polymerization reaction occur simultaneously to produce the polymer-polyol. Polyurethane foams are produced by the usual method but employing the novel adduct or polymer-polyol of the present invention.

Abstract: Integrally blended additives, consisting of a ternary mixture of gamma methacryloxypropyl trimethoxysilane, trimethylolpropane triacrylate and a siloxaneoxyalkylene block copolymer, in the absence of dicumyl peroxide do not consistently improve the mechanical properties of mica filled polyolefins. This is especially true under "low shear" melt processing conditions e.g. employing a conventional screw design in a single barrel extruder. However, when the ternary mixture is combined with a small amount of dicumyl peroxide (neat or dissolved in vinyltrialkoxy silane) there is a consistent improvement in composite mechanical properties above that of the composites containing the ternary mixture alone and in comparison to mica filled polyolefin composites without any additive or composites containing the peroxide alone. Furthermore, thermal aging tensile strength retention is improved in mica filled polypropylene composites containing the ternary mixture combined with dicumyl peroxide.

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.

Abstract: Bis-(N,N-dialkylamino)alkyl ethers are produced by reacting a (N,N-dialkylamino) alkanol over a heterogeneous solid acid catalyst. The (N,N-dialkylamino) alkanol can optionally be accompanied by an inert carrier. The resulting bis-ethers are useful as catalysts in the production of polyurethanes, especially cellular polyurethanes.