Abstract: The optically clear compositions comprising(A) an organopolysiloxane which contains at least one monovalent SiC-bonded radical with primary, secondary and/or tertiary amino groups,(B) 0.01 to 1 part by weight per 100 parts by weight of organopolysiloxane (A) of a group of compounds consisting of water, methanol and ethanol and(C) 0.05 to 20 parts by weight of a solubilizing agent per 100 parts by weight of organopolysiloxane (A), chosen from a group consisting of(C1) C.sub.1 - to C.sub.19 -carboxylic acid C.sub.1 - to C.sub.12 -alkyl esters and -glycol esters,(C2) C.sub.3 - to C.sub.20 -alkanols and C.sub.3 - to C.sub.20 -alkanol-C.sub.1 - to C.sub.12 -alkoxylates and(C3) organosilicon compounds containing glycoside radicals.

Abstract: The present invention provides novel phosphorus-containing organosilicon compounds which can be prepared in a simple manner using readily obtainable starting materials, which are hydrophilic to water-soluble and whose hydrophilicity or water-solubility can be specifically controlled by modification of the phosphorus-containing organosilicon compounds.

Abstract: A process for preparing dimethyldichlorosilane by reacting chloromethane with silicon in the presence of a catalyst combination comprising the metals or compounds of the metals copper, zinc and tin and/or antimony, and chlorosilanes or chlorodisilanes as activators. The activators are fed into the reactor as a gas containing at most 15% by volume of hydrogen.

Abstract: Plaster is rendered water-repellent by impregnation with organosiloxanes containing Si-bonded hydrogen atoms and with alkali metal silicate. In particular, the water-repellent action is improved in the case of shaped plaster articles treated at high drying temperatures.

Abstract: The invention relates to storage-stable compositions comprising(A) organopolysiloxane resin having hydroxyl and/or alkoxy groups bonded to silicon atoms, and(B) stabilizers selected from among(B1) aliphatic polycarboxylic acids having at least 2 carboxyl groups and(B2) carboxylic anhydrides of aliphatic polycarboxylic acids having at least 2 carboxyl groups.

Abstract: The invention relates to a process for stabilizing organopolysiloxanes which contain phosphazenes and/or their reaction products which promote the condensation and/or equilibration of organopolysiloxanes. To stabilize any previously known organopolysiloxanes which contain phosphazenes and/or their reaction products against re-arrangements and also molecular weight changes and viscosity changes resulting therefrom, it is proposed that the said phosphorus compounds be brought into contact with at least one non-basic, solid adsorbent.

Abstract: Alkenyl ether-siloxane compositions comprising(A) an oligomeric or polymeric organosilicon compound having on average more than one alkenyloxy group of the formulaR.sup.2 --CH.dbd.CH--O-- (VI)(B) a monomeric maleic and/or fumaric acid compound of the formula ##STR1## in which R.sup.2 is a hydrogen atom or the methyl radical,R.sup.3 is identical or different and is a hydrogen atom, a hydrocarbon radical having 1 to 16 carbon atoms, which can be interrupted by oxygen, sulfur or oxygen- or silicon-containing units, a substituted hydrocarbon radical having 1 to 6 carbon atoms, a silyl radical or a siloxanyl radical,R.sup.4 is identical or different and is a hydrogen atom, chlorine, bromine, fluorine or an optionally substituted alkyl radical andZ is an oxygen atom or a radical --NR.sup.5 --, where R.sup.5 has one of the meanings given for R.sup.3,optionally(C) initiators which form free radicals and optionally(D) inhibitors for regulating the pot life.

Abstract: Engineered DNA encoding 3-phosphoglycerate dehydrogenate (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 invention relates to a process for preparing alkyl- or aryldichlorosilanes by comproportionation of alkyl- or aryltrichlorosilanes with at least one silane containing Si-bonded methyl groups, hydrogen and/or chlorine atoms in the presence of a catalyst, and also a catalyst.

Abstract: The invention relates to coating compositions for producing watertight, vapor-permeable and flame-retardant coatings, comprising a vinyl chloride copolymer or vinyl acetate/ethylene dispersion, flameproofing agents, foam stabilizer and optionally crosslinkers. The invention further relates to a process for producing watertight, vapor-permeable and flame-retardant coatings by mechanically foaming the coating composition to produce a stable foam, applying the foam to a woven, knitted or nonwoven support material on one or both of the sides and drying it at a temperature of from 60.degree. to 180.degree. C. and optionally, after drying, compressing the foam layer. The textile support materials coated with the coating composition are suitable for use in building protection and in the geotextile sector.

Abstract: Process for the stiffening of textile or leather materials, includes (a) applying an aqueous polymer dispersion to a textile structure on the basis of a woven or nonwoven fabric, or a leather material; (b) drying the textile structure or leather material; and (c) the stiffening material thus produced is deformed and glued with the textile and leather material to be stiffened, in which an aqueous dispersion of a two-phase, sealable emulsion graft copolymer having a soft phase and a hard phase is applied. The hard phase has a glass transition temperature of Tg of at least 50.degree. C. and includes monomer units such as methyl methacrylate, styrene, diisopropyl fumarate and vinyl chloride. The soft phase has a glass transition temperature Tg of at least 30.degree. C.

Abstract: Organopolysiloxane compositions which are stabilized to heat and can be crosslinked to give elastomers, which as stabilizer combination contain (D) a copper compound in an amount from 1 to 180 ppm by weight calculated as elemental copper and (E) a zinc compound in an amount of from 1 to 180 ppm by weight calculated as elemental zinc, in each case based on the total weight of the organopolysiloxane composition which is stabilized to heat and can be crosslinked to give elastomers, and (F) optionally, organic fatty acid.

Abstract: The invention relates to water-dispersible or water-soluble polymer powder compositions which can be crosslinked or condensed by acid and comprisesI) one or more pulverulent water-dispersible or water-soluble copolymers which can be crosslinked or condensed by acid,II) one or more pulverulent water-dispersible or water-soluble compounds from the group consisting of alkali metal or ammonium peroxo acid salts, andIII) one or more pulverulent water-dispersible or water-soluble reducing agents.

Abstract: Graft and core-shell copolymers are provided which are useful as binders and are prepared from a peroxy-containing copolymer phase a) wherein the copolymer phase contains 0.01 to 20% by weight of residues of an olefinically di-unsaturated peroxy compound and from 80 to 99.99% by weight of residues of at least one comonomer and a polymer phase b) grafted thereon which is obtained by grafting one or more monomers. A process for preparing the copolymers is also provided.

Abstract: The invention relates to partially crosslinked organopolysiloxanes which contain a radical forming group, a base-catalyzed process for their preparation, graft copolymers produced from these organopolysiloxanes and a process for the preparation of the graft copolymers. The present invention avoids problems related to known methods wherein a considerable portion of the organopolymer chains do not graft to the organopolysiloxane graft back-bone but remain as an unattached homopolymers.

Abstract: The compositions proposed contain, as their main constituents,(a) a diorganopolysiloxane with triorganosiloxy groups as terminal groups, the organic groups being hydrocarbon groups which may be halogenated,(b) the reaction product of a diacylated diorganotin compound with a disilaalkane containing, per molecule, at least two monovalent hydrocarbon groups which are bonded to silicon via oxygen and may optionally be substituted by an alkoxy group, or with an oligomer of such a disilaalkane,(c) an organosilicon compound containing, per molecule, at least one amino or amino group bonded to silicon via carbon,(d) optionally, a filler and(e) optionally, a disilaalkane and/or silane containing, per molecule, at least three monovalent hydrocarbon groups which are bonded to silicon via oxygen and may optionally be substituted by an alkoxy group, or an oligomer of such a disilaalkane and/or silane.

Abstract: The present invention relates to organosilicon compounds containing (meth)acryloxy groups which can be prepared in a simple manner with high selectivity using readily accessible starting substances. The organopolysiloxanes containing (meth)acryloxy groups rapidly crosslink in the presence of a photoinitiator and light. The compounds of the present invention may be employed in the production of coatings.

Abstract: Mounting for carrier bodies in an apparatus for the deposition of semiconductor material on heated carrier bodies, having a fixed current leadthrough passed through the base plate of the deposition apparatus, an electrode holder, and a graphite electrode. There is also at least one spring element which is disposed between the current leadthrough and the electrode holder, which permits a movement of the electrode holder relative to the current leadthrough and which cushions this movement.

Abstract: The transition metal-containing hydrophobic silica has a BET specific surface area of 40 to 450 m.sup.2 /g, a carbon content, obtained by the imparting of hydrophobic properties, of at least 0.5% by weight and a transition metal content of 10 to 10,000 ppm by weight. The hydrophobic silica is used as a heat stabilizer in addition-crosslinking 2-component silicone rubber materials.

Abstract: The present invention relates to storage-stable polysiloxane compositions which give permanently water-wettable elastomers. The polysiloxane compositions of the present invention which vulcanize to yield elastomers are useful as dental impression compositions.