Abstract: Novel (2-methyl-3-chloropropyl)-cyclohexyl-dialkoxysilanes are prepared by reacting a (2-methyl-3-chloropropyl)-cyclohexyldichlorosilane with a corresponding alcohol. The novel compounds are useful for the modification of silicones.

Abstract: An aromatic polyamide molding compound, comprising:I. an aromatic polyamide having the basic structure ##STR1## where Ar is an aromatic radical without amine-reactive functional groups n is a number between 5 and 500; X represents --SO.sub.2 -- or --CO--, andY represents --O-- or --S--; andII. an aromatic liquid crystalline thermoplastic.

Abstract: A method for processing chlorosilane distillation residues by hydrolysis with steam, in which the hydrolysis is carried out at escalating temperatures from about 130.degree. C. to at least 170.degree. C.

Abstract: The invention is directed to the preparation of aqueous polymer dispersions with polymer particles having polyol groups. The interfacial hydrophilia can be set in a desired manner. The dispersions contain substantially no dissolved macromolecular substances in the aqueous phase and are very stable. The dispersions are obtained through emulsion polymerization and subsequent modification.

Abstract: A process for waste liquid-free processing of residues of chlorosilane distillations, wherein the residue is allowed to react with liquid hydrochloric acid accompanied by the release of hydrogen chloride, the resulting reaction mixture is allowed to coagulate, the solid phase is separated and dried and heat-treated, and the liquid phase and the condensed gaseous constituents are recycled into the process.

Abstract: 1. A polyamide molding compound, comprised of:(I) an aromatic polyamide having the structure ##STR1## where n is a number between 5 and 500; X represents --SO.sub.2 -- or --CO--, andY represents --O-- or --S--; and (II) an amorphous polyamide.

Abstract: For the production of a shaped body of graphite with a reaction-bound Si/SiC coating it is proposed to bring the shaped body--provided with a slip layer of a homogenized mixture, heated and gassed under vacuum with gaseous silicon or impregnated with liquid silicon--to a form of predetermined dimensions. To this end the shaped body is treated after the coating by cutting or brushing or by electronically controlled laser erosion or by several of these measures.

Abstract: Pyridinium salts of the formula ##STR1## are prepared. The compounds are useful as phase transfer catalysts for the preparation of methacryloyloxyalkylalkoxysilanes and acryloyloxyalkylalkoxysilanes.

Abstract: A method of preparing a compound of the formula ##STR1## in which R.sub.1 is CH.sub.3 or C.sub.2 H.sub.5,n is 0 to 4,m is 1 to 3,R.sub.2 is H, --COOR.sub.1, alkyl or aryl, andR.sub.3 and R.sub.4 each independently is H, alkyl or aryl,which comprises reacting an alkyl ester of a dicarboxylic acid of the formula R.sub.1 OOC--CR.sub.3 R.sub.4 --COOR.sub.1 with a nitrile of the formula N.tbd.C--(CH.sub.2).sub.m R.sub.2 and with hydrogen in the presence of a hydrogenation catalyst.

Abstract: Molding compositions based on unsaturated polyester (UP) resins and containing natural fibers are prepared from which molded parts can be produced by hot pressing. The molded parts have a residual styrene content <0.1 wt. %. The UP resins are comprised of a customary UP and a mixture of styrene and di(meth)acrylic acid ester(s).

Abstract: The present invention is directed to a process for the catalytic hydrogenation of a starting material containing 4,4'-diamino-diphenylmethane (4,4'-MDA) or its mixtures with 2,4'-diamino-diphenylmethane, 2,2'-diamino-diphenylmethane and/or higher ring compounds of the diphenylmethane series to a hydrogenation product having a trans-trans isomer content of 4,4'-diamino-dicyclohexylmethane (4,4'-HMDA) of about 15 to 40 weight percent, based on the diamine content of the hydrogenated product, by continuously hydrogenating in at least one fixed bed reactor at a temperature of about 100.degree. to 190.degree. C. and a pressure of about 50 to 350 bar in the presence of a ruthenium catalyst on a catalyst support having a BET surface area of about 70 to 280 m.sup.2 /g and an average pore diameter d.sub.p of about 10 to 320 .ANG., the catalyst being prepared by impregnating the catalyst support to a penetration depth of at least about 50 .mu.

Abstract: Acyloxysilanes and carboxylic acid chlorides can be prepared simultaneously and continuously from organochlorosilanes and monocarboxylic acid anhydrides. Catalytically active amounts of organic bases soluble in the reaction mixture, their salts or organic acid amides are employed here.

Abstract: Alcohols and acids are esterified by means of liquid-phase equilibrium reactions on ion exchangers in an apparatus comprising a prereactor and a rectifying column with external reactors. The process is characterized by the fact that a portion of one of the starting compounds is fed directly to the external reactors.

Abstract: 3-chloropropylsilanes are prepared from hydrogensilanes and allyl chloride, where a stoichiometric excess of allyl chloride is maintained in the condensate of the vapor emitted by the boiling reactant mixture.

Abstract: Radiation-cured film webs are prepared from copolyesters having terminal hydroxyl groups, not more than 90% of the hydroxyl groups having been replaced by acrylate or methacrylate groups. The copolyesters comprise at least two different dicarboxylic acids and have a copolymer chain which is branched due to the presence of more than bifunctional polyester components, and must have a glass transition temperature of -30.degree. to +30.degree. C. and an average molecular weight between 1,000 and 10,000. The film webs are particularly suitable as a backing carrier coated on one or both sides with pressure-sensitive adhesives in the manufacture of labels or as the backing carrier of adhesive tapes.

Abstract: A catalyst for the metathesis of olefins and functionalized olefins, which contains a compound having the formula B.sub.2 O.sub.3 --Re.sub.2 O.sub.7 /Al.sub.2 O.sub.3 --SiO.sub.2.

Abstract: A process for producing 3-methyl-2-pentylcyclopent-2-en-1-one by cyclodehydration of .gamma.-methyl-.gamma.-decalatone, which comprises heating .gamma.-methyl-.gamma.-decalactone at a temperature effective for said cyclodehydration in the presence of an effective amount of phosphoric acid as a catalyst, and a mineral oil having a boiling point which is higher than that of said starting material and said product, and removing said product from the reaction mixture.

Abstract: Components made from at least two molded materials A and B which are firmly bonded together, and in whicha) the molded material A is composed of a matrix of polyamide or of a polyamide-containing molding composition and of a continuous, fibrous reinforcement embedded therein, andb) the molded material B is the rubber obtained after peroxidic vulcanization of a rubber composition which is applied to A, the rubber composition containing the following components:i) about 100 parts by weight of a rubber having carboxyl or anhydride functional groups;ii) about 10 to 300 parts by weight of fillers; andiii) about 1 to 10 parts by weight of peroxidic vulcanizing agents.

Abstract: A quaternary pyridinium halide is used as the phase transfer catalyst in a process for the preparation of an organosilane containing methacryloyloxy or acryloyloxy groups by reacting an alkali metal methacrylate or alkali metal acrylate with a chloroalkylsilane.

Abstract: Mercaptosilanes are prepared from haloorganylsilyl compounds and an alkali metal hydrogen sulfide in the presence of a polar, aprotic medium.