Abstract: The invention relates to a process for preparing 3-glycidyloxypropyltrialkoxysilanes of the general formulaCH.sub.2 (O)CHCH.sub.2 --O--(CH.sub.2).sub.3 Si(OR).sub.3 (I),in which R is an alkyl radical, by reacting allyl glycidyl etherCH.sub.2 (O)CHCH.sub.2 --O--CH.sub.2 CH.dbd.CH.sub.2 (II),with a trialkoxysilane of the general formulaHSi(OR).sub.3 (III),in which R is again an alkyl radical, in a heterogeneous, platinum-catalyzed hydrosilylation reaction, where the catalyst employed is a platinum(0) catalyst on a nonmetallic support.

Abstract: Acetoxysilanes are prepared by a process comprising:(i) reacting at least one chlorosilane with acetic acid in a medium containing acetyl chloride and a catalyst, and removing the hydrogen chloride which is formed during the reaction;(ii) reacting the reaction mixture from step (i) with acetic anhydride; and(iii) separating and obtaining the product acetoxysilane.

Abstract: Organopolysiloxane containing compositions are prepared by mixing an organopolysiloxane containing an aminoalkyl group, an organopolysiloxane containing a fluoroalkyl group, and optionally, organopolysiloxanes containing alkyl groups, together with water, or a water/acid mixture, or a water/acid/alcohol mixture, where the mixture is adjusted to have a pH in the range of 1-8, then removing the alcohol already present or formed during reaction.

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: N-[.omega.-(methyl),.omega.-(silyl)]alkyl-N-organocarboxamides, oligomeric and polycondensed Si-containing compounds thereof, or mixtures of the corresponding monomeric, oligomeric and polycondensed Si-containing compounds. These materials are useful as, for example, adhesion promoters and for coating surfaces.

Abstract: A process for the stabilizing of an organosilane with an effective, stabilizing amount of purified N,N'-diphenyl-p-phenylenediamine (DPPD). The purification of crude DPPD involves extracting crude DPPD with hexane thereby forming an extract solution containing DPPD, passing the extract solution over an adsorption layer comprising silica gel as the adsorbent to form a solution containing purified DPPD and recovering the purified DPPD from the solution.

Abstract: Acyloxysilanes are prepared by a process of reacting an organochlorosilane with an excess of monocarboxylic anhydride at elevated temperature, thereby forming product acyloxysilane and by-product acyl chloride transferring the reaction mixture to the middle inlet of a separation tower having a still pot at its base, removing excess carboxylic anhydride by distillation at the tower top under reduced pressure, removing acyl chloride by-product from the separation tower, uniformly removing acyloxysilane from the tower still pot, and reacting virtually quantitatively the residual acid chloride present in the acyloxysilane removed from the still pot by adding a metal carboxylate to the acyloxysilane and separating the metal chlorides formed from the product.

Abstract: A mixture of oligomers of alkylalkoxysilanes condensed in the chain and/or cyclic form, said mixture of oligomers containing less than 2% by weight of free alcohols and the condensed alkoxysilanes satisfying formula I: ##STR1## wherein R is an alkyl group having 3 to 18 carbon atoms, and each R' is a member (i) selected from the group consisting of methyl, ethyl or hydrogen, or is (ii) methyl or hydrogen, or is (iii) ethyl or hydrogen, the degree of oligomerization being in the range 2.ltoreq.x.ltoreq.20 and the quotient of the molar ratio ?Si/alkoxy group!.gtoreq.1; and/orsatisfying formula II: ##STR2## in which R is an alkyl group having 3 to 18 carbon atoms, and each R' is a member (i) selected from the group consisting of methyl, ethyl or hydrogen, or is (ii) methyl or hydrogen or is (iii) ethyl or hydrogen, the degree of oligomerization being x.gtoreq.3 and the quotient of the molar ratio ?Si/alkoxy group!.gtoreq.1.

Abstract: Organopolysiloxane-containing, water-based compositions which are essentially free from organic solvents, have a flash point of above 70.degree. C. and liberate essentially no alcohols through hydrolysis on dilution with water, and which contain, as functional groups, glycidyl ether alkyl, acryloxyalkyl and/or methacryloxyalkyl groups, where each silicon in the organopolysiloxane carries one functional group, as well to a process for the preparation of such organopolysiloxane-containing compositions and to their 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 aqueous alcoholic fluoroalkyl functional group containing organopolysiloxane-composition, comprising:organopolysiloxanes of formula I:RO?Si(A)(CH.sub.3).sub.z (OR).sub.1-z O!.sub.a ?Si(B)(R.sup.2).sub.y (OR).sub.1-y O!.sub.b ?Si(C)(CH.sub.3)O!.sub.c ?Si(D)(OR)O!.sub.d R.multidot.(HX) (I)wherein A is an aminoalkyl radical derived from the compound of formula II:H.sub.2 N(CH.sub.2).sub.f (NH).sub.g (CH.sub.2).sub.h Si(OR).sub.3-z (CH.sub.3).sub.z (II)wherein 0.ltoreq.f.ltoreq.6, 9=0 if f=0 and g=1 if f>0, 0.ltoreq.h.ltoreq.6 and 0.ltoreq.z.ltoreq.1, and B is a fluoroalkyl radical derived from the compound of formula III:R.sup.1 --Y--(CH.sub.2).sub.2 Si(R.sup.2).sub.y (OR).sub.3-y (III)wherein R.sup.1 is a mono-, oligo- or perfluorinated alkyl group having 1-9 C atoms or a mono-, oligo- or perfluorinated aryl group, Y is a CH.sub.2, O or S group, R.sub.2 is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group and 0.ltoreq.y.ltoreq.

Abstract: A process for removing residual acidic chlorine from acyloxysilanes, comprises virtually quantitatively reacting metal carboxylates with the acidic chlorine present in the acyloxysilane, and the metal chlorides formed being separated off.

Abstract: An aqueous alcoholic fluoroalkyl functional group containing organopolysiloxane- composition, comprising:organopolysiloxanes of formula I:RO?Si(A)(CH.sub.3).sub.z (OR).sub.1-z O!.sub.a ?Si(B)(R.sup.2).sub.y (OR).sub.1-y O!.sub.b?Si(C)(CH.sub.3)O!.sub.c ?Si(D)(OR)O!.sub.d R.multidot.(HX)(I)wherein A is an aminoalkyl radical derived from the compound of formula II:H.sub.2 N(CH.sub.2).sub.f (NH).sub.g (CH.sub.2).sub.h Si(OR).sub.3-z (CH.sub.3).sub.z (II)wherein 0.ltoreq.f.ltoreq.6, 9=0 if f=0 and g=1 if f>0, 0.ltoreq.h.ltoreq.6 and 0.ltoreq.z.ltoreq.1, and B is a fluoroalkyl radical derived from the compound of formula III:R.sup.1 --Y--(CH.sub.2).sub.2 Si(R.sup.2)y(OR).sub.3-y (III)wherein R.sup.1 is a mono-, oligo- or perfluorinated alkyl group having 1-9 C atoms or a mono-, oligo- or perfluorinated aryl group, Y is a CH.sub.2, O or S group, R.sub.2 is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group and 0.ltoreq.y.ltoreq.

Abstract: Organocarbonoyloxysilanes are prepared by reacting an organochlorosilane with a carboxylic acid in a first step which liberates HCl, removing the HCl which is formed, reacting the reaction mixture from the first step with a carboxylic acid anhydride in a second reaction step, the first and/or second reaction steps being conducted in the presence of a catalyst, and isolating the resulting organocarbonoyloxysilane product from the reaction mixture.

Abstract: An aqueous organopolysiloxane-containing composition comprising organopolysiloxanes of formula I:HO?Si(A) (CH.sub.3).sub.z (OH).sub.1-z O!.sub.a ?Si(B) (R.sup.2).sub.y (OH).sub.1-y O!.sub.b ?Si(C) (CH.sub.3)O!.sub.c ?Si(D) (OH)O!.sub.d H.multidot.(HX).sub.e (I),wherein A is an aminoalkyl group of formula II:H.sub.2 N(CH.sub.2).sub.f (NH).sub.g (CH.sub.2).sub.h Si(OR).sub.3-z (CH.sub.3).sub.z (II),in which 0.ltorsim.f.ltorsim.6, g=0 if f=0 and g=1 if f>0, 0.ltorsim.h.ltorsim.6 and 0.ltorsim.z.ltorsim.1;B is a fluoroalkyl group of formula III:R.sup.1 --Y--(CH.sub.2).sub.2 Si(R.sup.2)y(OR).sub.3-y (III),wherein R.sup.1 is a mono-, oligo- or perfluorinated alkyl group having 1-9 C atoms, or a mono-, oligo- or perfluorinated aryl group, Y is a CH.sub.2, O or S group, R.sup.2 is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group and 0.ltorsim.y.ltorsim.1;C is an alkyl group of formula IV:R.sup.3 --Si(CH.sub.3) (OR).sub.2 (IV),and D is an alkyl group of formula V:R.sup.3 --Si(OR).sub.

Abstract: Cyclic silane esters and solvolysis products thereof and processes for making these materials. The cyclic silanes and their solvolysis products are useful as adhesives, crosslinking agents and reagents for modifying polymers containing ester groups.

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: The process of the invention, using a plurality of passes, divides the crude product of each pass into a part which contains tetramers and higher oligomers and represents the desired product of a pass and at least one further part which contains the major part of the monomers, dimers and trimers and which serves at least in part as part of the starting materials in a subsequent reaction pass. At the same time, the catalyst concentration is increased. In all reaction passes, only a moderate starting material conversion is sought.

Abstract: Water-based organopolysiloxane-containing compositions which are essentially free from organic solvents, have a flashpoint above 80.degree. C., and essentially liberate no alcohols by hydrolysis on dilution with water are obtainable by mixing water-soluble aminoalkylalkoxysilanes with alkyltrialkoxysilanes and/or dialkyldialkoxysilanes and/or mixtures of alkyltrialkoxysilanes and dialkyldialkoxysilanes which are not water-soluble, adding water to the mixture, adjusting the pH of the reaction mixture to a value of between 1 and 8 and removing any alcohol already present and/or formed during the reaction. Such compositions are especially useful for hydrophobicizing the surface of building materials such as brick, concrete, lime sand brick, and mortar.

Abstract: Alkylhydrogenchlorosilanes of formula I:R.sub.x HSiCl.sub.y (I)wherein R are identical or different alkyl radicals, x is 1 or 2 and y is 1 or 2 and the sum of x and y is equal to 3, are prepared by comproportionating alkylchlorosilanes of formula II:R.sub.a SiCl.sub.n (II)wherein R denotes identical or different alkyl radicals, a is 1 or 2 and n is 2 or 3 and the sum of a and n is equal to 4 with hydrogenchlorosilanes of formula III:R.sub.b H.sub.c SiCl.sub.4-b-c (III)wherein R denotes identical or different alkyl radicals, b is 0, 1, 2 or 3 and c is 1, 2, 3 or 4 and the sum of b and c is equal to or smaller than 4, in the presence of a catalyst saturated with a hydrogen halide.