Abstract: Peroxidically crosslinkable silicone rubber compositions containing a filler which has covalently bound Si—H-containing groups exhibit lower tendency toward yellowing while maintaining or increasing other elastomer physical properties and processing properties.

Abstract: The invention concerns a dispersion powder composition which is redispersible in water and is made from water-insoluble organic polymers, the composition being characterized in that it contains 0.1 to 30% by wt., relative to the weight of the organic polymers, of one ormore silicon compounds which are dispersible in water and which have a boiling point at normal pressure of 160° C., selected from the group comprising the silanes, polysilanes, oligosiloxanes, carbosilanes, polycarbosilanes, carbosiloxanes, polycarbosiloxanes and polysilylenedisiloxanes. The invention also concerns methods for manufacturing such compositions and their use.

Abstract: Curable organopolysiloxane compositions comprising a platinum catalyst selected from the group consisting of (PR23)2Pt(—C≡C—R3)2  (III), (R22P—R4—PR22)Pt(—C≡C—R3)2  (IV) and H—C≡C—R5—C≡C—[—Pt(PR23)2—C≡C—R5—C≡C—]e—H  (V) where R2, R3, R4, R5 and e are as defined in claim 1.

Abstract: The present invention relates to linear polyether-polysiloxane copolymers of the general formula A(BC)nBA, in which linear polyether and linear polysiloxane units are linked via Si—C bonds, and to a process for their preparation.

Abstract: A process is provided for preparing crosslinkable binders in the form of the aqueous dispersions by polymerizing vinyl ester-olefin copolymers in the presence of protective colloid, which comprises polymerizing vinyl ester-olefin copolymers having a Tg of less than −10° C. by emulsion polymerization in the presence of a protective colloid based on (meth)acrylate polymers comprising from 80 to 95% by weight, based on the overall weight of the polymer, of acrylates or methacrylates of aliphatic alcohols of 1 to 12 carbon atoms and from 5 to 20% by weight, based on the overall weight of the copolymer, of ethylenically unsaturated monocarboxylic or dicarboxylic acids, the latter copolymer having a glass transition temperature Tg of from 60 to 120° C., and, after the end of polymerization, introducing the crosslinkable groups by reacting the carboxyl groups of the (meth)acrylate polymers with ethylenically unsaturated compounds comprising functions suitable for esterifying the carboxyl group.

Abstract: The invention relates to jointing compounds which are based on vinyl ester-ethylene copolymers or on acrylate polymers in the form of their aqueous dispersions or of water-redispersible powders with, if desired, other additives, such as fillers, plasticizers, thickeners, dispersants, antifoams, preservatives, pigments and water, wherein the jointing compounds contain from 0.01 to 1.0% by weight, based on the total weight of the jointing compound, of alkylalkoxysilanes of the general formula SiRn(OR′)4−n, where n is from 1 to 3, R′ represents identical or different alkyl radicals or monoalkyl glycol radicals having from 1 to 8 carbon atoms and R represents identical or different alkyl radicals having from 1 to 8 carbon atoms which may, if desired, be substituted with a halogen such as chlorine, or with ether, ester, amide, hydroxyl, amino, carboxyl, epoxy, carboxylic anhydride or carbonyl groups.

Abstract: The invention relates to aqueous emulsions containing (A) organo-hydrogenated polysiloxanes optionally mixed with organopolysiloxanes free of Si linked hydrogen and organyloxy groups, (B) organopolysiloxanes containing organyloxy groups as stabilizers, (C) emulsifiers and (D) water.

Abstract: The invention relates to silicon dioxide which bears partially or fully silylated polysilicic acid chains on its surface, wherein the sum of silanol groups of the silicon dioxide surface (SiOH) and grafted-on silylating agent radicals (SiRa) is greater than the number of silanol groups on the surface of untreated silicon dioxide, where a can be 1, 2 or 3 and R can be identical or different and are each a substituted or unsubstituted hydrocarbon radical.

Abstract: The gas flow in water-containing natural gas wells and natural gas storage wells is improved if a homogeneous phase comprising a water-repellent, solvolysis-resistant active compound is injected into the water-bearing rock.

Abstract: A heat insulating molded body made of inorganic material and inorganic reinforcement fibers is disclosed, as well as a process for producing the same and its use. The molded body is characterized by the following composition: (a) 30-70 wt. % blown vermiculite; (b) 15-40 wt. % inorganic binder; (c) 0-20 wt. % infrared opacifier; (d) 15-50 wt. % microporous material; (e) 0.5-8 wt. % reinforcement fibers which contain maximum 2 wt. % B2O3 and at most 2% alkalimetal oxide, based on the weight of the reinforcing fibers.

Abstract: Novel organopolysiloxane compositions comprising (A) organopolysiloxanes which contain at least one SiC-bonded organic radical containing basic nitrogen, where the basic nitrogen is optionally present in part as a salt of a water-soluble organic acid, water-soluble inorganic acid, or water-insoluble organic acid, (B) anionic, cationic, nonionic or amphoteric surfactants, which are in soluble or soluble in (A) (C) substituted or unsubstituted diacrylates and/or oligoacrylates, and optionally, (C′) substituted or unsubstituted acrylates, and (D) water are described.

Abstract: A textile binder in the form an aqueous copolymer dispersion or of a copolymer powder obtainable by means of free-radical emulsion polymerization of a) one or more monomers from the group consisting of vinyl esters, esters of acrylic acid and methacrylic acid, vinylaromatics, vinyl halides and alpha-olefins and b) from 0.01 to 10% by weight, based on the overall weight of the copolymer, of one or more monomers b1) from the group consisting of the N-(alkoxymethyl)acrylamides and N-(alkoxymethyl)-methacrylamides or one or more monomers b2) from the group consisting of N-methylolacrylamide and N-methylolmethacrylamide, or mixtures b1) and b2), where as emulsifier(s) from 0.01 to 10% by weight, based on the overall weight of the copolymer, of one or more emulsifiers from the group of the monoesters or diesters of sulfosuccinic acid with linear, unbranched or branched, or cycloaliphatic alcohols, are employed or are added to the aqueous copolymer dispersion after the end of the emulsion polymerization.

Abstract: In a process for the direct synthesis of methylchlorosilanes, chloromethane is reacted with a catalyst composition comprising silicon, copper catalyst, zinc promoter and pyrogenic silicic acid.

Abstract: Condensation-crosslinking, room-temperature vulcanizing silicone rubber compositions A which contain additives B selected from the group consisting of sterically hindered phenols, sterically hindered bisphenols, sterically hindered thiobisphenols, zinc dialkyl dithiophosphates, zinc diaryl dithiophosphates, aromatic amines, sterically hindered amines or preparations containing the abovementioned substances, these additives optionally being present in the compositions A either individually or in any mixtures and mixing ratios with respect to one another.

Abstract: A method and apparatus for drying semiconductor fragment material, has at least one vacuum-tight chamber with at least one receiving means for semiconductor fragment material, and there is a means for maintaining a vacuum in the apparatus.

Abstract: A process for the preparation of di- and trialkylsilanes of the general formula (I) RaR1bSiXc  (I), in which mono- or dialkylsilanes of the general formula (II) R1bSiHaXc  (II) are reacted with alkenes A which have at least 3 carbon atoms and are optionally substituted by fluorine, chlorine or bromine atoms or cyano groups, in the presence of a transition metal catalyst and a trihalogenosilane of the general formula (III) R2SiY3  (III) as an activator, wherein, in the above general formulae (I) to (III), R is a branched or cyclic hydrocarbon radical having at least 3 carbon atoms, optionally substituted by fluorine, chlorine, or bromine, or cyano groups, R1 is an alkyl radical optionally substituted by fluorine, chlorine, or bromine, or cyano groups, R2 is a hydrogen atom, or an alkyl radical optionally substituted by fluorine, chlorine, or bromine, or cyano groups, X is fluorine, chlorine, or bromine, or an alkoxy radical having 1 to 18 carbon atoms optionally substi

Abstract: The invention relates to a process for cleavage of chlorohydrocarbons which are present as an impurity in organochlorosilanes, in which the chlorohydrocarbons are brought into contact with steel surfaces which comprise nickel as an alloying constituent, and are cleaved into olefins and hydrogen chloride.

Abstract: The invention relates to a process for drying out rock containing immobile formation water in the intake radius of natural gas wells and gas storage wells which deliver less than 50 l of water per 1000 m.sup.3 (S.T.P.) of natural gas produced, in which a dispersion comprising the componentsA) a water-repellent active compound,B) hydrophilic water-miscible dispersion medium, with or withoutC) a dispersant renders the water-containing rock hydrophobic.

Abstract: Flexible building compositions are provided which are based on mineral binders and vinylester-ethylene mixed polymers which are stabilized by protective colloids and prepared by radical aqueous emulsion polymerization.

Abstract: Organosilicon compounds containing (meth)acrylate groups and oxyalkylene groups and comprising units of the formulaA.sub.a A'.sub.u R.sub.b SiX.sub.c O.sub.(4-a-b-c-u)/2, (I)where R is as defined in claim 1,X are identical or different and are each a radical of the formula --OR.sup.1 where R.sup.1 is a hydrogen atom or an alkyl radical having from 1 to 8 carbon atoms in which ether oxygen atoms may be present, or a radical of the formula--R.sup.2 {[CH(CH.sub.3)CH.sub.2 O].sub.e [CH.sub.2 CH.sub.2 O].sub.f [(CH.sub.2).sub.4 O].sub.g R.sup.3 }.sub.y-1, (II)where R.sup.2, R.sup.3, e, f, g and y are as defined in claim 1, A is a radical of the formula ##STR1## where R.sup.4, R.sup.5 and x are as defined in claim 1, A' is a radical of the formula ##STR2## where R.sup.3, R.sup.5, R.sup.9, R.sup.10, e, f and g are as defined in claim 1,a is 0, 1 or 2, u is 0, 1 or 2, b is 0, 1, 2 or 3 and c is 0, 1, 2 or 3,with the proviso that the sum a+b+c+u.ltoreq.