Abstract: A process for the preparation of organopolysiloxane resins, wherein a silane

Abstract: Organopolysiloxanes bearing quaternary ammonium groups and containing units of the general formula —[R2—(SiR2—O)b—SiR2—R2—N+R12]n—·nX−  (I′) where R are identical or different monovalent, SiC-bonded, optionally substituted C1-12 hydrocarbon radicals, R1 are identical or different monovalent, optionally substituted C1-12 hydrocarbon radicals or are a bridging alkylene radical, X is an organic or inorganic anion, R2 is a divalent hydrocarbon radical having at least 4 carbon atoms which contains at least one hydroxyl group and is optionally interrupted by one or more oxygens, b is an integer from 1 to 200 and n is an integer from 1 to 50. and processes for the preparation thereof.

Abstract: The invention provides cross-linkable polymer powder compositions containing a) at least one water-soluble polyhydroxy compound; b) at least one boric acid complex compound which is of limited solubility in water that is, it has a water solubility of less than 10 g per liter at normal conditions; and optionally c) a water-soluble film-forming polymer consisting of one or more free-radical polymerizable, ethylenically unsaturated monomers. The compositions are useful as a constituent in adhesives, plaster, jointing mortars, paints and binders for coating compositions, textiles, paper and the like.

Abstract: The invention relates to a process for the chlorination of methylsilanes, which comprises reacting methylsilanes with chlorine in the presence of at least 0.1% by weight of hydrogen chloride, based on the weight of methylsilane of the formula (II), under the action of electromagnetic radiation which induces chlorination, chlorine being used in a substoichiometric amount based on the methylsilane of the formula (II), and the reaction being carried out at temperatures below the boiling point of the methylsilane of the formula (II). The invention further relates to an apparatus suitable for carrying out the chlorination of an industrial scale.

Abstract: Pastes comprise (1) siloxane copolymers which contain at least two groups of the general formula

Abstract: The invention relates to a paper composite material with repulp-resistant adhesive coating, consisting of a paper carrier and an adhesive layer, characterized in that an intermediate coat of a dispersion polymer film containing a protective colloid and/or an emulsifying agent and with a glass transition temperature Tg of −20° to 40° is applied between the paper carrier and the adhesive coating. The invention also relates to a method for the production of paper composite material with repulp-resistant adhesive coating.

Abstract: An aqueous 1-component composition which forms a resilient silicone network on drying and is obtained by reaction, at a temperature of at least 40° C., of I) a surfactant-stabilized dispersion of a highly crosslinked silicone compound which carries reactive groups which are selected from silanol, hydrocarbon-oxy and silanolate groups with II) a surfactant-stabilized emulsion of optionally precrosslinked silicone oil which carries reactive groups which are selected from silanol, hydrocarbon-oxy and silanolate groups.

Abstract: Extremely high solids content silica dispersions are useful for forming green bodies of near net shape as compared to the shape of the bodies after sintering. The green bodies are particularly useful for sintering to form low impurity-containing crucibles for single crystal silicon production.

Abstract: Shaped bodies comprise addition-crosslinked silicone elastomers crosslinked in the presence of at least one rhodium or iridium catalyst or mixtures of both catalyst types. The shaped bodies may be made transparent and colorless and are well suited for use as food and baking molds in the food industry. The catalyzed addition-crosslinkable components display excellent pot life as well as good high temperature cure.

Abstract: Peroxide-functional organopolysiloxanes (P) have at least one unit of the formula (I)

Abstract: A process for the continuous preparation of addition-crosslinking silicone rubbers from a base composition containing at least one polyvinyl polysiloxane and at least 10% by weight, based on the liquid silicone rubber, of hydrophobicized filler, by removing the base composition from a container whose volume reduces proportionally with the amount removed, and conveying the composition by way of a pump with a positive pressure difference to two further pumps (4) which convey the base composition onward, so a component A is prepared continuously by admixing at least one metal catalyst with one stream of the base composition, and a component B is prepared continuously and simultaneously by admixing the crosslinker and inhibitor with a second stream of the base composition, where the metal catalyst, crosslinker, and inhibitor are fed by way of a feed unit which meters in each of the substances.

Abstract: A method for the rapid coating of a wire in a batch coating installation, wherein the wire is wound onto a product carrier and is then passed through a coating installation in batch mode in the manner which is customary for the coating of a wire.

Abstract: Crosslinkable organopolysiloxane compositions, comprising; (1) an organopolysiloxane which contains SiC-bonded radicals with aliphatic carbon—carbon multiple bonds, and (2) an organopolysiloxane with Si-bonded hydrogen atoms or, instead of (1) and (2), or (3) an organopolysiloxane which contains SiC-bonded radicals with aliphatic carbon—carbon multiple bonds and Si-bonded hydrogen atoms, (4) a catalyst which promotes the addition of Si-bonded hydrogen onto an aliphatic multiple bond, (5) a reinforcing filler (6) a non-reinforcing filler having an average particle diameter of less than 30 &mgr;m and a BET surface area of less than 30 m2/g and, optionally, further substances.

Abstract: Addition-crosslinking silicone compositions comprise

Abstract: A process for preparing polyvinyl-alcohol-stabilized polymers based on vinyl ester, ethylene, and optionally other comonomers, in the form of aqueous polymer dispersions or water-redispersible polymer powders, by means of free radical initiated continuous emulsion polymerization and optionally drying the resultant polymer dispersion, comprising carrying out the emulsion polymerization in minimally two pressurized reactors arranged in series at a temperature of from 40° C. to 100° C. and at a pressure of from 5 to 100 bar, to a residual monomer content less than 3% by weight, and continuing the polymerization in minimally one unpressurized reactor at a temperature of from 20° C. to 60° C. and at a pressure of less than 1.0 bar, wherein the polymerization is initiated using a redox system made from an oxidizing component and a reducing component, at least a portion of the reducing component introduced within the first pressurized reactor.

Abstract: Polydiorganosiloxanes of the general formula

Abstract: The invention provides mixed aromatic vinyl-1,3-diene polymers stabilized by a protective colloid and present in the form of aqueous polymer dispersions or polymer powders redispersible in water as adhesives for porous substrates. The polymer dispersions and the polymer powders are obtained by emulsion polymerization of a mixture containing: a) 20 to 80 percent by weight of one or more vinylaromatics; b) 19.9 to 79.9 percent by weight of one or more 1,3-dienes; c) 0.1 to 15 percent by weight of one or more comonomers from the group consisting of N-methylolacrylamide, N-methylolmethacrylamide and the N-(alkoxymethyl)-acrylamides and N-(alkoxymethyl)-methacrylamides with a C1 to C6-alkyl radical. The sum of the above percentages adds up to 100% by weight. Emulsion polymerization is carried out in the presence of one or more protective colloids and without emulsifiers, optionally followed by drying of the resulting aqueous polymer dispersion.

Abstract: A ceramic evaporation boat for the evaporation of metal comprising an electrically conductive component and an electrically non conductive component, wherein the electrically conductive component of the ceramic material is concentrated at the surface of the evaporation boat from which the evaporation of the metal occurs. The evaporation boats have an improved initial wetting performance.

Abstract: O/W emulsions, contain at least one organosilicon compound bearing a glycoside radical and at least one metal oxide are present. The emulsions are stable with respect to pH and exhibit a high degree of dispersion of the metal oxide. The emulsions are particularly useful as cosmetic formulations, in particular as sun screen lotions and creams.

Abstract: A device is provided for depositing semiconductor material on a heated substrate body, having a stationary current leadthrough, which is guided through the baseplate of the deposition device. This is an electrode mount with an underside, which is arranged above the current leadthrough, and an upper side, which is connected to a carbon electrode into which a substrate body can be fitted. The carbon electrode has a thermal conductivity of >145 W/m*K and a coefficient of thermal expansion which is matched to the coefficient of thermal expansion of silicon.