Abstract: An improved process for preparing 1,3-dialkyl-1,1,3,3-tetraryldisiloxanes and 1,3,5-trialkyl-1,1,3,5,5-pentaaryltrisiloxanes is disclosed. The process utilizes an aryl Grignard reagent to affect displacement of alkoxy, preferably methoxy, groups in the corresponding alkyl-alkoxy substituted di-, and trisiloxanes. Alternatively, partial replacement of the alkoxy groups in an alkyltrialkoxysilane with aryl groups in a Grignard reaction, and subsequent hydrolyis of the remaining alkoxy groups yield the above-noted desired compounds.

Abstract: Addition to organosilicon compounds having at least one alkyl group attached to a silicon atom, at least one hydrogen atom being attached to the carbon atom adjacent the silicon atom, of a fluorocompound, which may be a fluoroolefin, a perfluoroketone, or a perfluoroether having a carbon-carbon double bond in .alpha.-position to the ether oxygen atom, give fluorine-containing organosilicon compounds. These adducts may be liquid or solid and are useful as (1) lubricants and sealants for automotive and aerospace industries (2) fire-resistant hydraulic fluids, and (3) siloxane elastomers having good oil and lubricant resistance.

Abstract: Expansion of a ring structure and extension of a noncyclic structure containing a ketosulfone grouping in the ring by reaction with a 2-X-alkyl-3-allyl-trialkylsilane intermediate in which X is a leaving group and conversion to an expanded ring.

Abstract: Alkoxysilylacrylamides, alkoxysilylacrylates and alkoxysilylbenzylidene malonates are provided and a method for making such materials. These alkoxysilanes have been found useful as UV stabilizers and as adhesion promoters when incorporated into silicone compositions useful as top coats for thermoplastic organic polymers.

Abstract: A process for recovering and recycling elementary silicon from a direct process organohalosilane reactor system is provided, comprising the steps of analyzing a portion of effluent contact mass, such as the silicon fines from a secondary cyclone with a particle size distribution analyzer, determing the fines fractions containing the relatively greatest amounts of impurities and segregating a relatively impure fine fraction from a purer coarse fraction with the aid of an aerodynamic centrifugal classifier.

Abstract: This invention relates to an improvement in the vapor phase catalytic production of an amine by the reaction of a mixture comprising an olefin having from 2 to 8 carbon atoms and ammonia or ammonia type compound. The improvement which provides for high selectivity to the amine resides in the use of an alumino silicate as the catalyst.

Abstract: The Si-modified bis-phthalic acid derivatives according to the invention are monomeric, oligomeric or polymeric compounds. An example of a monomeric compound of the invention is the amidoacid of the formula ##STR1## which is formed by reacting 4,4'-diaminodiphenylmethane and 4-N,N'-bis-[3-tri-n-propoxy)-silyl-propyl]-aminophthalic anhydride in solution, in a molar ratio of 1:2. To produce oligomeric or polymeric compounds, the reaction has to be carried out with a 3rd component, for example pyromellitic dianhydride.The products are used as adhesion promoters, for example between inorganic solids and organic resins.

Abstract: A process for the preparation of ortho-methyldiphenylmethane, a compound useful as an intermediate in the synthesis of anthraquinone, using liquid hydrogen fluoride to catalyze the alkylation of benzene with .alpha.-chloro-o-xylene at temperatures from about -10.degree. C. to 10.degree. C.

Abstract: In processes in which liquid sorbents that are solutions in an aromatic hydrocarbon or halogenated aromatic hydrocarbon of a bimetallic salt complex having the generic formula M.sub.I M.sub.II X.sub.n.Aromatic, wherein M.sub.I is a Group I-B metal, M.sub.II is a Group III-A metal, X is halogen, n is the sum of the valences of M.sub.I and M.sub.II, and Aromatic is an aromatic hydrocarbon or halogenated aromatic hydrocarbon are used to separate complexible ligand from a gas feedstream that comprises an olefin having 2 or 3 carbon atoms, alkylation of the aromatic hydrocarbon or halogenated aromatic hydrocarbon is inhibited by incorporating in the liquid sorbent a small amount of triphenylboron.

Abstract: The invention provides a novel class or organosilane compounds having a methacryloxy group and one or more of alkenyloxy groups bonded to the silicon atom as represented by the general formula ##STR1## in which R.sup.1 is a monovalent hydrocarbon group having from 1 to 8 carbon atoms, R.sup.2, R.sup.3 and R.sup.4 are each a hydrogen atom or a monovalent hydrocarbon group having from 1 to 8 carbon atoms, m is an integer of 3, 4 or 5 and n is a number of zero, 1 or 2. The organosilane compound, e.g. 3-methacryloxypropyl-containing alkenyloxysilanes can be readily prepared by the addition reaction of allyl methacrylate and a corresponding alkenyloxysilane having a hydrogen atom directly bonded to the silicon atom in the presence of a platinum catalyst. The organosilane compounds are useful as a coupling agent to increase adhesive bonding strength between inorganic and organic materials.

Abstract: A novel compound, 2-(N,N-dimethyamino) indan-1,3-dione, is useful as an ultraviolet absorbent and is produced from salicylaldehyde, betaine and acetic anhydride.

Abstract: This invention describes a novel process whereby meta-substituted anilides are nitrated in the para position in high yields.

Abstract: The present invention relates to a process for obtaining dilane derivatives of sepiolite by reaction with alkoxy-silanes to improve their reinforcing capacity in polymers, the reaction being carried out by placing the finely divided sepiolite and the alkoxy-silane in close contact, either by vaporization of the latter by the action of heat or by the spraying thereof with nitrogen, the contact taking place in countercurrent in a column of suitable dimensions, the reaction temperature ranging between room temperature and the vaporization temperature of the alkoxy-silane, further characterized in that the silane derivative of the sepiolite is subsequently dried to 110.degree. C. to remove the reaction byproducts.

Abstract: Dyestuffs of the formula ##STR1## wherein R, T.sub.1, R.sub.1, R.sub.2, NR.sub.1 R.sub.2, T.sub.2, Z, B and. . . have the meaning given in the description,and their use for dyeing and printing materials containing hydroxyl groups or amide groups, such as textile fibers, filaments and fabrics of wool, silk, synthetic polyamide fibers and polyurethane fibers, and for the wash-fast dyeing and printing of natural or regenerated cellulose.

Abstract: Compositions for protecting materials from growth of pestiferous organisms, and particularly for protecting marine surfaces from fouling organisms, are formed from precursors having the formula ##STR1## where m is from 1 to about 10, where each X is independently selected from the group consisting of alkyl and alkoxyalkyl radicals containing less than about 6 carbon atoms and Y, where Y has the formula ##STR2## where R.sub.1 R.sub.2 and R.sub.3 are independently selected from the group consisting of alkyl, cycloalkyl, and aryl radicals, where R.sub.1, R.sub.2 and R.sub.3 contain in combination up to about 18 carbon atoms. The ratio of the tin atoms to silicon atoms in the precursors is at least about 1:50.The precursors can be directly used as an additive for coatings. The precursors can also be used by subjecting them to hydrolysis and polycondensation to form an organotin substituted polysiloxane for use as an additive and a binder for coatings.

Abstract: A continuous process for preparing silanes and siloxanes having SiOC groups which comprises (a) introducing in a liquid phase a chlorosilane and a hydroxyl-containing aliphatic compound in parallel flow into a first stage of a first reactor in an amount such that from 0.5 to 0.

Abstract: Through condensation ortho- and para-isomers of methylene dianiline (MDA) as well as PMPPA are produced as condensation products from arylamines, especially from aniline, and formaldehyde in the presence of acid catalysts, in which at least one component is a perfluoro-carbonic acid. From this mixture of the condensation products, 4,4'-MDA (p-isomer) of high purity is obtained by crystallization while the homogeneous aqueous solution obtained is being cooled down. It has been discovered that the 4,4'-MDA salts of the perfluoro-carbonic acids are less soluble in water than the corresponding salts of the o-isomers and the PMPPA.

Abstract: A process for converting the low-boiling constituents formed in the preparation of methylchlorosilane to the Muller-Rochow process and which consist essentially of tetramethylsilane, dimethylmonochlorosilane and 2-methylbut-2-ene into a product mixture consisting essentially of trimethylchlorosilane, dimethylchlorosilane and C.sub.2 -.sub.20 alkyldimethylchlorosilanes or C.sub.6-10 -aryldimethylchlorosilanes, comprising contacting the low-boiling product mixture with AlCl.sub.3, AlOCl and/or AlBr.sub.3, together with hydrogen chloride, in the liquid phase at about 40.degree. to +25.degree. C. The mixture prior to conversion may be contacted with HCl and either ZnCl.sub.2 or active charcoal and/or an olefin may be added thereto.

Abstract: Novel disubstituted dichlorosilane compounds which have two different specified substituents and are necessary as monomers for preparing special silicone resin are provided and a method for producing same without accompaniment of by-product production is also provided.

Abstract: The final products are compounds of the formula ##STR1## wherein (a) each of R.sup.1, R.sup.2 and R.sup.3 alkyl having from 1 to 22 carbon atoms; or(b) one or more is a phenyl or alkylphenyl type, n is from 3 to 20; andR is of an aralkyl-, phenyl-tryptophanyl- or benzocycloalkyl-type, eg D,L-5,5-dimethyl-5-sila-pentadecanoyl-1'-phenyl-2'-p-tolyl-ethylamide, are useful as antiatherosclerotic agents, and are prepared from corresponding carboxylic acids (or their derivatives).