Abstract: Bridged monocyclopentadienyl derivatives of a Group 4 metal are prepared by contacting a corresponding bis(cyclopentadienyl) metal complex with an alkali metal derivative or alkaline earth metal derivative of a hydrocarbyl ligand R, which is optionally substituted with one or more amino, phosphino, ether, thioether, or silyl groups. The bis(cyclopentadienyl) Group 4 metal complexes can be prepared by contacting a compound corresponding to one of the formulas (Cp).sub.3 MQ.sub.n X.sub.t, (Cp).sub.2 MQ.sub.n X.sub.t+1, or CpMQ.sub.n X.sub.t+2 and a dianionic salt compound corresponding to the formula: (L.sup.+x).sub.y (Cp*-Z-Y).sup.-2 or ((LX').sup.+x).sub.y (Cp*-Z-Y).sup.-2. An addition polymerization catalyst comprising a bis(cyclopentadienyl) Group 4 metal complex and an activating cocatalyst, and an addition polymerization process using such a catalyst.

Abstract: A silicone composition and process for hydrophobizing zinc oxide, and the resultant hydrophobic zinc oxide are disclosed. The silicone composition is a reactive alkoxy silicone which is applied to the zinc oxide then in a subsequent step the coated zinc oxide is heated to 40.degree. to 100.degree. C for between 1 and 10 hours for the reaction to occur. The resulting zinc oxide is hydrophobic, non-reactive, and not affected by water.

Abstract: An organic-inorganic polycondensate characterized by the fact that it satisfies the following formula:C.sub.v H.sub.w O.sub.x Si.sub.y Me.sub.zwhere:v=4 to 48w=5 to 52x=5 to 48y=2 to 16z=1the ratio v/(y+z) being less than 7;C.sub.v H.sub.w being a carbon-containing chain carried by silicon; andMe being a metal or a mixture of metals chosen from groups IVA, VA, VIA, IIIB, and IVB of the periodic table of elements.

Abstract: This invention provides organosiloxane compounds containing silicon-bonded polyoxometalate (POM) structures that are present as pendant groups. The invention also provides methods for preparing these reaction products.

Abstract: Disclosed are shaped organopolysiloxanes containing sulfonate groups and consisting of units(O.sub.3/2 Si--R.sup.1 --SO.sub.3.sup.-).sub.x M.sup.x+ (I)in which R.sup.1 is an alkylene group, x is a number from 1 to 4 depending on M, and M is hydrogen or a monovalent to tetravalent optionally complex metal ion, and the valencies of the silicon linked oxygen atoms are saturated by silicon atoms of other groups (I) or by crosslinking silicon and aluminum compounds, the ratio of the silicon atoms in (I) to the silicon and aluminum atoms of the crosslinker being from 1:4 to 1:20. The organopolysiloxanes containing sulfonate groups are present in the form of spherical particles with a diameter of 0.01 to 3 mm, a specific surface of 0.1 to 1200 m.sup.2 /g, a specific pore volume of 0.01 to 6 ml/g, and an apparent density of 50 to 1000 g/l. Also disclosed are processes for the production of the shaped sulfonated organopolysiloxanes and to their use as a solid acid catalyst.

Abstract: A silica gel based heat-resistant and weatherproof antimicrobial composition having an aluminosilicate layer on the surfaces of pores in the silica gel as substituted by silver and an optional antimicrobial metal, said composition containing ion-exchangeable metals that are chiefly an alkali metal and that are present in an amount of up to 2.57 mmol per gram of said composition on an anhydrous basis.

Abstract: The invention relates to a new bis(trialkylsilyl) chromate of the formula ##STR1## where n is approximately 1-2. Such a compound can be prepared by causing a corresponding silyl halide to react with silver chromate. The product is especially suitable for the polymerization and copolymerization of ethylene, the formed polymer having a high molar mass and a wide molar mass distribution.

Abstract: The present invention relates to a catalyst preparation produced from a palladium(II) compound and a functional siloxane, in which the functional siloxane contains on average at least one reactive group per molecule.

Abstract: A method is provided for preparing preceramic polymers and silicious ceramic materials which derive therefrom. The preceramic polymers are polysiloxanes which are synthesized by catalytically activating Si-H bonds in a hydridosiloxane starting material and replacing the activated hydrogen atoms with non-hydrogen substituents. These preceramic polysiloxanes are pyrolyzed in a selected atmosphere to give the desired ceramic product. Ceramic products which may be prepared by this technique include silica, silicon oxynitride, silicon carbide, and metal silicates.

Abstract: The invention pertains to rhenium (VII) compounds which are catalysts for metathesis of ordinary olefins (hydrocarbons) and functionalized olefins in a homogeneous phase and to methods of synthesizing these compounds. The rhenium compounds comprise a rhenium (VII) atom centrally linked to an alkylidene ligand, an alkylidyne ligand, and two other ligands of which at least one ligand is sufficiently electron withdrawing to render the rhenium atom significantly active for metathesis.

Abstract: A monocyclopentadienyl or substituted monocyclopentadienyl metal complex containing compound useful as a polymerization catalyst corresponding to the formula:CpMX.sub.n.sup.+ A.sup.-wherein:Cp is a single .eta..sup.5 -cyclopentadienyl or .eta..sup.5 -substituted cyclopentadienyl group optionally covalently bonded to M through a substituent;M is a metal of Group 3-10 or the Lanthanide Series of the Periodic Table bound in the .eta..sup.5 bonding mode to the cyclopentadienyl or substituted cyclopentadienyl group;X each occurrence independently is selected from the group consisting of hydride, halo, alkyl, aryl, silyl, germyl, aryloxy, alkoxy, amide, siloxy, neutral Lewis base ligands and combinations thereof having up to 20 non-hydrogen atoms, and optionally one X together with Cp forms a metallocycle with M;R is alkyl or aryl of up to 10 carbons;n is one or two depending on the valence of M; andA is a noncoordinating, compatible anion of a Bronsted acid salt.

Abstract: Silicon or siloxane diols react with dicyclopentadienyl zirconium compounds to form catalytically active compositions. These compositions can be used to polymerize ethylene when combined with methylaluminoxane.

Abstract: A bisindenyl derivate of the formula I ##STR1## (M.sup.1 =Si or Ge, R.sup.6 and R.sup.7 =unsubstituted or substituted idenyl radical)is obtained in very good yield by reacting a compound of the formula II ##STR2## (X=halogen) with a compound of the formula III or IVR.sup.6 -M.sup.2 (III) R.sup.7 -M.sup.2 (IV)(M.sup.2 =alkali metal)if, in the reaction, compound III or IV is added slowly to compound II.Compound I is suitable as a starting material for the preparation of metallocene catalyst components.

Abstract: The invention relates to compositions for transparent or translucent antiperspirants comprising a polyol, the reaction product of an antiperspirant salt and a silane and an optional gelling agent, but no or substantially no water. When gelled, the composition is suitable for use as a stick antiperspirant. The invention also relates to the process by which compositions of the invention are prepared.

Abstract: Organopolysiloxane products containing acyl thiourea groups and from the units: ##STR1## are disclosed. R.sup.1 stands for an optionally substituted phenyl group or an alky group and R.sup.2 and R.sup.3 forR.sup.4 --SiO.sub.3/2 (2)units. R.sup.4 is alkylene. The free valences of the oxygen atoms are saturated by Si atoms of further R.sup.4 --SiO.sub.3/2 groups and/or by Si atoms of: ##STR2## amine units, wherein R.sup.5 =H; R.sup.2 or R.sup.3 and/or by cross-linking compounds of Si, Ti or Al. The ratio between the Si atoms in (1) and (3) to the Si, Ti, Al cross-linking atoms is 1:0 to 1:10. Various methods of preparing the products are described. These polymers to separate metals from solutions.

Abstract: A colloidal hydrosilylation catalyst is provided by effecting reaction between a silicon hydride or a siloxane hydride and a Pt(O) or Pt(II) catalyst. The colloidal catalyst forms stable mixtures with olefinically unsaturated organopolysiloxanes.

Abstract: The present invention provides chemically stable colloidal antimony oxide which has been treated with a particular organosilicon compound in the ratio of from 0.5 to 25 weight % based on the antimony and whose pH has been regulated to within the range of from 2 to 12.

Abstract: Phenylenesulfonate group-containing organopolysiloxanes are disclosed consisting of units represented by the formula: ##STR1## in which R.sup.1 represents --CH.sub.2 --CH.sub.2 -- or CH.sub.3 --CH<, x is equal to a number from 1 to 4 depending on M, and M represents hydrogen or a 1-4 valent metal ion or NH.sub.4, and the free valences of the oxygen atoms are saturated by silicon atoms of further groups of formula (1) and/or by cross-linking agents and/or by nonsulfonated phenylene units represented by the formula: ##STR2## A method for the preparation of the phenylenesulfonate group containing organopolysiloxanes, as well as the use of said substances as strongly acidic cation exchangers is also disclosed.

Abstract: Platinum and/or palladium containing organopolysiloxane-ammonium compounds containing units represented by the structural formula: ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 represent:R.sup.5 --SiO.sub.3/2 (2)wherein R.sup.5 is an alkylene group and the free valences of oxygen are satisfied by silicon atom and additional groups of the structural formula (2), optionally with the introduction of a crosslinking agent,R.sup.4 can be R.sup.1, R.sup.2, R.sup.3 or hydrogen, alkyl, cycloalkyl or benzyl,Y.sup.x- is MeX.sub.4.sup.2- or MeX.sub.6.sup.2-, wherein Me is platinum or palladium andX is chlorine or bromine, and can further denote a 1 to 3 valent anion of a protonic acid capable of forming a stable salt with an amine, or the hydroxy group, andx is a number from 1 to 3. Methods for the obtaining the polymeric organosiloxane-ammonium-noble metal complexes and as well as the use thereof as catalysts for hydrosilylation and hydrogenation reactions are disclosed.

Abstract: Functionalized phenylene group-containing organopolysiloxanes, comprising a plurality of identical or different units of the formula: ##STR1## where in each case all three possible isomers in relation to the position of the SiO.sub.3/2 --R.sup.1 substituents on the phenylene group can be present concurrently, in which the bridge groups R.sup.1 represent the groups --CH.sub.2 --CH.sub.2 -- or CH.sub.3 --CH<, X represents Cl, Br, CH.sub.2 Cl, P(C.sub.6 H.sub.5).sub.2, and Ch.sub.2 P(C.sub.6 H.sub.5).sub.2, and the free valences of the oxygen atoms are saturated by silicon atoms of other groups of formula (1) and/or by cross-linking agents. Also disclosed is a process for the preparation of said polysiloxanes.

Abstract: Phenylene group-containing organopolysiloxanes formed of a plurality of identical or different units represented by the structural formula: ##STR1## where in each case all three possible isomers in relation to the position of the SiO.sub.3/2 --R.sup.1 substituents on the phenylene group can be present concurrently, in which R.sup.1 stands for --CH.sub.2 --CH.sub.2 -- or CH.sub.3 --CH< and the free valences of the oxygen atoms are saturated by silicon atoms of other groups of formula (1) and/or by cross-linking bridge groups. A process for the preparation of these polysiloxanes and the use thereof for the synthesis of carriers of active substances is also disclosed.

Abstract: A mixture of an organopolysiloxane fluid, a zirconium-containing organosiloxane compound having at least one zirconium atom and at least one siloxane unit, and a cerium-containing organosiloxane compound having at least one cerium atom and at least one siloxane unit is an organopolysiloxane viscous coupler fluid which can be used in gear systems. These coupler fluids undergo little viscosity increase or decrease and little torque variation at elevated temperature and under high shear over long periods of time.

Abstract: An oleophilic composition comprising a powdery or granular substance having a hydrophilic surface and a surface modifier comprising an aluminum chelate compound of the formula (I): ##STR1## wherein R.sup.1 is selected from hydrogen and C1-6 alkyl, R.sup.2 is selected from methyl and phenyl, R.sup.3 is selected from R.sup.4 --, R.sup.5 O-- and R.sup.6 NH--, A is selected from R.sup.7 O--, R.sup.8 COO--, R.sup.9 SO.sub.3 --, R.sup.10 OSO.sub.3 --, ##STR2## R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, R.sup.10, R.sup.11, R.sup.12 and R.sup.13 are C1-22 alkyl or C3-22 alkenyl, aryl, aralkyl or alkylaryl, R.sup.3 may be the same as or different from R.sup.7, R.sup.8, R.sup.9, R.sup.10, R.sup.11, R.sup.12 and R.sup.13, with the proviso that at least one of R.sup.3, R.sup.7, R.sup.8, R.sup.9, R.sup.10, R.sup.11, R.sup.12, and R.sup.13 is a substituent having at least 8 carbon atoms or a polymerizable alkenyl group, and m=0.5 to 2.7, n=0.3 to 2.5 and m+n=0.8 to 3.

Abstract: Organopolysiloxanes are described with the same or different units of the formula:(O.sub.3/2 Si-R.sup.1 -SO.sub.3.sup.-).sub.x M.sup.x+ (1)in which R.sup.1 is alkyl, x is dependent on M and signifies a number from 1 to 4 and M represents hydrogen or a mono- to tetravalent metal ion and the valences of the oxygen atoms are saturated by silicon atoms of other groups of the formula (1), optionally by inserting cross-linking silicon, titanium or aluminum compounds and/or by di-, tri- and tetrasulfide units of the formula: ##STR1## in which the substituents R.sup.1 have the same meaning as in (1) and can be the same or different, wherein the ratio of the sum of silicon atoms in (1) and (2) to the silicon, titanium and aluminum atoms of the cross-linking agent ranges from 1:0 to 1:10. Furthermore, the method of obtaining the organopolysiloxanes containing sulphonate groups and the use thereof as strongly acidic cation exchangers are described.

Abstract: Zeolite-metal catalysts having a substantial amount of catalytically active metal, e.g. iron, deposited in the cavities of the zeolite in zero-valent, small cluster form, are prepared by vaporizing the metal under low vapor pressure conditions in the vicinity of an organic liquid solvent, e.g. toluene, such that the metal dissolves in the solvent as a labile solvated zero-valent metal complex. This complex is contacted with the zeolite so that the complex diffuses into the cavities of the zeolite. Upon subsequent warming the solvated metal complex decomposes, leaving zero-valent small metal clusters in the zeolite cavities.

Abstract: Catalyst systems for the oligomerization and/or isomerization of olefins which comprise a nickel (II) complex and a co-catalyst. The nickel (II) complex is a square planar species with a trivalent Group V donor ligand, preferably a phosphine or phosphite ligand, a halogen or pseudo-halogen ligand and a bidentate dithio ligand, especially a substituted dithio-.beta.-diketone ligand.