Abstract: An apparatus for continuously preparing substantially halogen-free, in particular chlorine-free, trialkoxysilanes of the general formula I

Abstract: An organosiloxane which has at least one triamino group of formula I: [NHx(CH2)aNHy(CH2)bNHz]—  (I) which is bonded to at least one silicon atom via at least one N-bonded alkylene group having 1 to 4 C atoms, a and b are identical or different and are each an integer ranging from 1 to 6, x is 0 or 1 or 2, y is 0 or 1, z is 0 or 1 or 2, with the proviso that (x+y+z)≦4, and at least one Si—C-bonded fluoroalkyl group of formula II: F3C(CF2)r(CH2)s—  (II)  wherein r is 0 or an integer ranging from 1 to 18 and s is 0 or 2.

Abstract: A process for modifying the functionality of organofunctional substrate surfaces by first reacting the organofunctional group of a silicon compound A with the surface of a substrate, where the silicon compound A bears at least one organofunctional group and, as other groups, bears at least one chloro, alkoxy, carboxy or hydroxyl group, then applying to the pretreated substrate an organofunctional silicon compound B, where the silicon compounds A and B are identical or different and the silicon compound B bears at least one chloro, alkoxy, carboxy or hydroxyl group. The process produces surface-modified substrates for other applications.

Abstract: An oligomer mixture of n-propylethoxysiloxanes, containing from 80 to 100% by weight of n-propylethoxysiloxanes having a degree of oligomerization ranging from 2 to 6.

Abstract: A mixture of organoalkoxysiloxanes of formula I: 1

Abstract: The invention relates to the use of (1) a liquid functional organylorganyloxysilane bound to a carrier, or of a liquid (co)condensate derived from a functional organylorganyloxysilane and bound to a carrier for preparing cable compounds which comprise (2) a thermoplastic base polymer having polar functional groups and (3) a reinforcing or extending mineral filler.

Abstract: A process for the purification of crude N,N′-diphenyl-p-phenylenediamine (DPPD), which comprises extracting crude DPPD with a hydrocarbon or hydrocarbon mixtures thereby forming an extract solution containing DPPD, passing the extract solution over an adsorption layer, and recovering purified DPPD from the solution.

Abstract: An apparatus for the purification of crude N,N′-diphenyl-p-phenylenediamine (DPPD) in which there is an extraction unit containing a liquid permeable container and an adsorption layer downstream of the container, a solvent evaporator downstream of the adsorption layer, a filter unit, a line for returning the filtrate to the solvent evaporator, and a condenser for returning solvent to the extraction unit.

Abstract: The present invention relates to mixtures of catenate and cyclic siloxane oligomers of the formulae I and II where the substituents R consist of (i) aminopropyl-functional groups of the formula —(CH2)3—NH2 or —(CH2)3—NHR′ or —(CH2)3—NH(CH2)2—NH2 or —(CH2)3—NH(CH2)2—NH(CH2)2—NH2,in which R′ is a linear, branched or cyclic alkyl group of 1 to 18 carbon atoms or an aryl group of 6 to 12 carbon atoms, and (ii) methoxy, ethoxy, 2-methoxyethoxy and/or propoxy groups, and (iii) if desired, alkyl, alkenyl, isoalkyl or cycloalkyl groups of 1 to 18 carbon atoms and/or aryl groups of 6 to 12 carbon atoms, and where not more than one aminopropyl-functional group is attached to one silicon atom and the degree of oligomerization of compounds of the formula I is within the range 2<m<30 and that of compounds of the formula II is 3≦n≦30 and the quotient of the molar proportion of Si/alkoxy group is ≧0.5.

Abstract: The present invention relates to a process for producing an ink, paint, pollutant, bioorganism, oil, water and/or dirt repellent coat on an inorganic substrate, comprising:

Abstract: A composition comprising at least one organofluorine-functional silane and/or siloxane, at least one mineral acid and at least one metal salt of aluminum(III), tin(II), tin(IV), iron(III) or titanium(III); a process for preparing said composition and to its use; and surface-modified substrates obtainable by coating with said composition.

Abstract: The present invention relates to a process for manufacturing magnesium alkoxide by conversion of magnesium with an alcohol, characterized in that magnesium is used in piece form. The invention also relates to the use of magnesium alkoxide obtained according to the present invention as a feedstock for chemical or pharmaceutical processes, or for manufacturing catalysts or as an anhydrous neutralizing agent.

Abstract: Particulate magnesium ethoxide having a high coarse particle content can be obtained in a simple and economical manner by the present invention, which provides a process for preparing particulate magnesium ethoxide having a coarse grain content, and includes reacting metallic, optionally activated, magnesium with liquid ethanol under pressure at a temperature above 78° C.

Abstract: Particulate magnesium ethoxide having a high coarse particle content can be obtained in a simple and economical manner by the present invention, which provides a process for preparing particulate magnesium ethoxide having a coarse grain content, and includes reacting metallic, optionally activated, magnesium with liquid ethanol under pressure at a temperature above 78° C. The present invention also relates to particulate magnesium ethoxide having a coarse grain content, which contains: <40% by weight of a screening fraction ≦500 &mgr;m and ≧60% by weight of a screening fraction >500 &mgr;m.

Abstract: The invention concerns solutions of alkoxides containing titanium and/or zirconium and/or hafnium and magnesium and/or calcium and/or strontium and/or barium of general formula (I): [MII(OR)2-y(OR1)y]n.[MIV(OR1)4-z(OR)2], in which: MII means magnesium and/or calcium and/or strontium and/or barium; MIV titanium and/or zirconium and/or hafnium; R is an alkyl group with 1 to 18 carbon atoms; R1 is an alkyl group with 1 to 18 carbon atoms, y has a value of between 0 to 2; z has a value of 0 and 4; and n is a number between 0.001 and 3, with the exception that n cannot be 1 when y is 2 and z is 0, or when y is 0 and z is 4. The invention further concerns the production of these alkoxides and their use.

Abstract: An aqueous organopolysiloxane-containing composition comprising organopolysiloxanes of formula I: HO [Si(A)(CH3)z(OH)1−zO]a[Si(B)(R2)y(OH)1−yO]b[Si(C)(CH3)O]c[Si(D)(OH)O]dH.

Abstract: The present invention relates to a stable composition of water-soluble organosiloxanes obtained by reacting a) a water-soluble amino-functional alkoxysilane with at least one water-insoluble alkenyl-functional alkoxysilane b) by adding water to form a mixture, and c) removing the alcohol formed during step b) from the mixture, where the amino-functional alkoxysilane and the water are used in the reaction at least in amounts such that substantially all of the alkoxy groups of the water-insoluble silane can react and such that when a resulting composition is diluted with water, essentially no alcohol is liberated by hydrolysis, and the composition, during an/or after the reaction, has a pH of from 2 to 6, the pH being preferably adjusted by adding an organic or inorganic, optionally aqueous, acid. In addition, the present invention discloses a process for the preparation of such a composition and also its use.

Abstract: Fluoroalkyl organosilicon compounds are prepared by reacting fluoroolefins with organosilicon compounds that contain at least one H-Si group, in the presence of a Pt(0) complex catalyst. Further, fluoroalkylalkoxy organosilicon compounds are prepared by esterifying fluoroalkyl organosilicon compounds. The process proceeds uniformly under mild conditions with high yields and selectivities.

Abstract: An oligomerized polyorganosiloxane cocondensate which may be obtained, in part, by mixing an water-soluble amino-functional organosilane represented with at least one of the followoing: a fluoro-functional organosilane, an organosilane, and an organosilane. The cocondensate may be used, for example, in a method of treating surfaces.

Abstract: The present invention relates to surface-modified fillers obtained by mixing a filler with water, adding an water-based organosiloxane composition with very thorough mixing, wherein the organosiloxanes are soluble in water and contain, in addition to OH groups, at least one amino-functional group and optionally a functional group from the series consisting of alkyl, haloalkyl, alkenyl, glycidyl ether alkyl, acryloxyalkyl and methacryloxyalkyl, and wherein a functional group is bonded to each silicon atom of the organosiloxane, and drying the mixture. The present invention also provides a process for the surface modification of fillers, their use and ethylene-vinyl acetate copolymer compositions which include the surface-modified fillers.