Abstract: This invention relates to a process for working up the alcohol-containing wastewater which is obtained in the hydrolysis of silanes of the general formula IR.sup.1.sub.a SiCl.sub.b (OR.sup.2).sub.4-a-b (I),whereR.sup.1 are hydrogen atoms or identical or different monovalent, unsubstituted or halogen-substituted, SiC-bonded C.sub.1 -C.sub.18 -hydrocarbon radicals,R.sup.2 are identical or different monovalent C.sub.1 -C.sub.10 -hydrocarbon radicals,a is 0, 1, 2 or 3, on average from 0.3 to 1.9, andb is 0, 1, 2, 3 or 4, on average from 0.0 to 3.0,with the proviso that the sum a+b is on average at most 3.5, for the preparation of silicone resins, wherein, in the first step, the wastewater is made alkaline by addition of alkali and, in the second step, the alcohol is removed from the resulting alkaline solution or suspension by injection of steam.

Abstract: A method and device for heating silicon carrier bodies in a deposition reactor are by means of radiated heat. In this method, the carrier bodies are irradiated by means of a heat radiation device which emits radiation having a color temperature of at least 2000.degree. C.

Abstract: The invention relates to polyorganosiloxane rubber compositions which vulcanize to elastomers under the influence of heat and compriseA) 100 parts by weight of organopolysiloxane,B) 10 to 200 parts by weight of filler,C) 0.1 to 10 parts by weight of crosslinking agent which forms free radicals andD) 0.05 to 10 parts by weight of aliphatic alcohol with C.sub.8 - to C.sub.30 -alkyl radicals.The aliphatic alcohol (D) acts as an internal mold release agent.

Abstract: Fusible vinyl acetate copolymer fibers based on vinyl acetate copolymers are provided and contain (a) at least 40.0% by weight of vinyl acetate units; (b) 15.0 to 50.0% by weight of monomer units that consist of one or several chlorine-free, ethylenically unsaturated monomer units that consist of one or several ethylenically unsaturated monomers whose homopolymers have a glass transition temperature Tg from -100.degree. to 0.degree. C.

Abstract: An effect coating material and an effect coating, especially for vehicle bodies, containing interference pigments, in which the interference pigments are composed of three-dimensionally crosslinked, liquid-crystalline, main-chain polymers, which include main-chain mesogens having an at least approximately chiral nematic arrangement, and which are formed from at least one esterified cellulose ether.

Abstract: Alkylchlorosilanes are prepared continuously from the residue of direct synthesis of alkylchlorosilanes containing liquid constituents with a boiling point of at least 70.degree. C. at 1013 hPa and solid constituents, by heating the residue with hydrogen chloride at temperatures of from 300.degree. C. to 800.degree. C. in a tubular reactor with internals which can be rotated.

Abstract: A novel process for preparing organosilicon compounds containing (meth)acxyloxy groups is described, in which alkoxylated alk-2-yne 1,4-di(meth)acrylates (1) of the formula ##STR1## where R.sup.2 is a hydrogen atom or a methyl radical,R.sup.3 is a linear or branched alkylene radical having from 1 to 6 carbon atoms per radical andR.sub.4 is a linear or branched alkylene radical having from 1 to 6 carbon atoms per radical, andz is an integer from 1 to 12,are reacted with organosilicon compounds (2) comprising units of the formula ##STR2## where R is an identical or different monovalent, optionally halogenated hydrocarbon radical having from 1 to 18 carbon atoms per radical, ande is 0 or 1, on average from 0.01 to 1.0,f is 0, 1, 2 or 3, on average from 0.0 to 3.

Abstract: A process for preparing organosilicon compounds having Si-bonded hydrogen atoms comprises,in a first step,reacting silanes of the general formula R.sup.1 R.sub.a SiX.sub.3-a, where R. is a monovalent hydrocarbon radical free from aliphatic multiple bonds, R.sup.1 is a monovalent terminal unsaturated hydrocarbon radical, X is a halogen atom or a radical of the formula --OR.sup.2, and a is 0 or 1; with organosilicon compounds having at least two Si-bonded hydrogen atoms per molecule; in the presence of catalysts which promote the addition of Si-bonded hydrogen to an aliphatic multiple bond; and removing excess silanes by distillation, where the ratio employed of aliphatic double bond in the silane to Si-bonded hydrogen in the organosilicon compound is from 1.0 to 2.0; andin a second step,reacting the resultant compounds having hydrolyzable groups with silanes of the general formula H.sub.b R.sub.3-b SiZ or siloxanes of the general formula H.sub.b R.sub.3-b SiOSiR.sub.3-b H.sub.

Abstract: The present invention relates to siloxane copolymers containing vinyloxy groups and a method of preparing the siloxane copolymers. The copolymers of the present invention are useful for the production of coatings which can be crosslinked by light and radiation-curable printing inks.

Abstract: The invention relates to a process for the preparation of microcapsulated flakes or powders by drying aqueous mixtures containing (a) one or more water-emulsifiable, non-thermoplastic compounds which have a higher boiling point than waterand (b) at least one water-soluble, film-forming polymer, in which the content of component (a) is up to about 95% by weight, based on the dry weight of components (a) and (b), with the proviso that the water-soluble, film-forming polymer has a flocculation point of from 20.degree. to 98.degree. C. or the flocculation point is adjusted to from 20.degree. to 98.degree. C. with the aid of additives, and drying is carried out by thin-layer drying in a temperature range above the flocculation point.

Abstract: The present invention relates to organopolysiloxane resin solutions which contain 1-alkenes and are free from aromatic hydrocarbons, processes for their preparation and their use in organopolysiloxane compositions from which it is possible to produce coatings which repel tacky substances.

Abstract: Engineered DNA encoding 3-phosphoglycerate dehydrogenase (PGD) has reduced sensitivity to inhibition by serine in comparison to wild-type PGD. The DNA encodes PGD which has at least some level of enzymatic activity useful for biosynthesis, and which retains that activity at higher serine levels than does the (unmodified) wild-type PGD. The PGD has the amino acid sequence of this above-described engineered DNA. Expression vectors contain this engineered DNA and regulatory DNA positioned and oriented for expression of the engineered DNA in a host expression system. Cells contain these expression vectors, and a method for producing serine or a serine-derived product includes culturing such cells.

Abstract: The organopolysiloxane compositions are prepared by(1) organopolysiloxanes, and(2) prehydrophobicized oxidic stiffening fillers being blended and kneaded in a kneading machine 1 having at least two kneading chambers 2 which are arranged in series next to one another, each contain two axially parallel kneading tools 3 drivable so as to corotate or counterrotate, and communicate with one another via openings 5 through which passage is possible transversely to the axes 4 of the kneading tools 3, the first kneading chamber 2 having a charging port 6 and the final kneading chamber 2 having a discharge port 7.

Abstract: The organopolysiloxane particles consist of a single molecule, are crosslinked and have an average diameter of 5 to 200 nm. At least 80% of the particles have a diameter which deviates from the average diameter by not more than 30%. The particles are soluble in a solvent to the extent of at least 5% by weight.

Abstract: The invention relates to a process for the silylation of very finely divided inorganic oxides, in which the very finely divided inorganic oxides are treated with at least one silylating agent which is relatively nonvolatile in the temperature range of the overall process, with the proviso that the relatively nonvolatile silylating agent is admixed with the very finely divided inorganic oxides as a liquid, in the form of a very finely atomized aerosol. Furthermore, the invention relates to a highly apolar, pyrogenic silica prepared by this process.

Abstract: The invention relates to cosmetic or pharmaceutical preparations comprising pigments whose coloring depends on the viewing angle and comprising additives which are customary for cosmetic or pharmaceutical preparations, wherein the pigments comprise at least one oriented crosslinked substance having a liquid-crystalline structure with a chiral phase, are plateletlike in form and have a thickness of 1-20 .mu.m.

Abstract: Organosilicon compounds containing amino groups, their preparation and their useOrganosilicon compounds containing amino groups and comprisinga) siloxane units of the formulaR.sub.a Si(OR.sup.1).sub.b O.sub.(4-a-b)/2 (I)andb) at least one unit per molecule selected from the group consisting of units of the formulaeAR.sub.C SiO.sub.(4-c-1)/2 (II),O.sub.(4-c-1)/2 R.sub.C Si--A.sup.1 --R.sub.C SiO.sub.(4-c-1)/2 (III)or ##STR1## where R is an identical or different hydrocarbon radical which has from 1 to 18 carbon atoms, optionally substituted by halogen atoms, alkoxy groups or hydroxy groups where the hydrocarbon radical is optionally interrupted by oxygen atoms,R.sup.1 is an identical or different alkyl radical which is optionally interrupted by oxygen atoms,a is 0, 1, 2 or 3 andb is 0, 1, 2 or 3, with the proviso that the sum a+b is not greater than 3, andc is 0, 1 or 2,A is a radical of the formula--R.sup.2 R.sup.3.sub.z N(--CR.sup.4.sub.2 --R.sup.5).sub.(2-z) (V),A.sup.

Abstract: The present invention relates to organosilicon compounds containing glycoside radicals, having units of the formula ##STR1## in which R is identical or different and represents a hydrogen atom or an organic radical,a is 0, 1, 2 or 3,b is 0, 1, 2 or 3 andR.sup.1 can be identical or different and represents a radical of the formulaZ--(R.sup.2 O).sub.c --R.sup.3 -- (II)in whichZ represents a glycoside radical which is built up from 1 to 10 monosaccharide units,R.sup.2 can be identical or different and represents an alkylene radical,c is 0 or a number from 1 to 20, andR.sup.3 represents an alkylene radical, with the proviso that the sum of a and b is less than or equal to 3 and the organosilicon compound comprising units of the formula (I) contains at least one radical R.sup.1 per molecule.

Abstract: The proposed aqueous coating product for the production of coatings whose perceived color changes with the angle from which they are viewed contains: one or more water-diluable binders; one or more scale-type pigments, the hue of which depends on the angle from which they are viewed, these pigments consisting of oriented, three-dimensionally cross-linked substances of chiral phase, liquid crystalline structure; optionally one or more cross-linking agents; optionally one or more coloring absorption pigments and/or fillers; and optionally additives usually used in coatings of this type.

Abstract: A method for the treatment of semiconductor material in a liquid bath has the treatment based upon the occurrence of cavitation being brought about in the liquid bath. The semiconductor material is contacted with a cavitating liquid in order to clean fragments of the semiconductor material and to round fracture edges of the fragments.