Abstract: Disclosed is a process for preparing a supported metallocene catalyst by introducing, in a first stage, a gas stream comprising an organoaluminum compound, an inert support material and water, into a first gas phase reactor; allowing the mixture to react under conditions effective to form an aluminoxane supported on said inert support material; metering a second gas stream comprising a metallocene into said gas phase reactor; allowing said mixture to react under conditions effective to form a supported metallocene catalyst; and drying, in a second stage, said supported metallocene catalyst, wherein said drying is carried out in a gas phase reactor.

Abstract: The invention relates to binders for antifouling coating compositions, which can be prepared by copolymerizing polymerizable monomers, wherein, as polymerizable monomers, mixtures ofA) at least one of the compounds of the general formula I ##STR1## and B) at least one ethylenically unsaturated compound having the general formula II ##STR2## with or without C) at least one ethylenically unsaturated compound are polymerized.

Abstract: The invention relates to an improved process which, starting from 2-cyclopenten-1-ones substituted in the 3-position, gives a high yields of 1,3-dialkylcyclopentadienes which can be directly metallated and reacted to give the corresponding 1,3-dialkylcyclopentadienyl-transition metal complexes.

Abstract: The invention relates to binders for antifouling coating compositions, which are prepared by copolymerizing a mixture of polymerizable monomers comprisingA) at least one of the compounds of the general formula I ##STR1## and B) at least one ethylenically unsaturated compound having the general formula II ##STR2## with optionally C) at least one ethylenically unsaturated compound, where the molar ratio of (A+B) to C is from 1:0 to 1:10, are polymers in the presence of a free-radical initiator and inert solvent.

Abstract: Disclosed are monovinyltin trihalides of he general formula (I):(x)(x.sup.1)(x.sup.2)Sn--C(R).dbd.C(R.sup.1)--C(O)--R.sup.2(I)and a process for their preparation from 1,3-diketones, tin(II) halides and halogen acids.

Abstract: The present invention is directed to a gas phase process of preparing a supported metallocene catalyst wherein an alkylaluminum compound, water, a metallocene and, optionally, an olefin are metered into a fluidized bed reactor containing a fluidized bed of an inert support material in the presence of a gas stream.

Abstract: Stabilization of alkyltin compounds that are liquid at room temperature, especially alkyltin trihalides, is achieved by addition of 0.1 to 10 wt. % of one or more compounds that are soluble in the alkyltin compounds and that are reactive with water.

Abstract: Disclosed are homogeneous formulations consisting essentially of one or more oxidation-sensitive organometallic compounds in a hydrocarbon, such as paraffins having a boiling point of at least 150.degree. C. and a viscosity of at least 1 Pa.s at 25.degree. C. Also disclosed is a process for the preparation of these formulations.

Abstract: Novel bimetallic organometallic compounds, their synthesis and application in polymerization catalyst system based on combination of such novel bimetallic organometallic compounds with transition metal complexes is provided.

Abstract: A process for preparing transition metal complexes containing disubstituted cyclopentadienyl ligands of the general formula (1) ##STR1## in which a monomeric, monosubstituted cyclopentadiene is reacted using a mixture of an alkali metal oxide or hydroxide and an alkaline earth metal oxide or hydroxide as a metallating agent in polyoxyalkylene polyethers as the reaction medium with organic halides or pseudohalides to give the intermediate disubstituted cyclopentadiene which is, in situ, metallated and reacted with a transition metal halide to give the end product.

Abstract: The invention relates to a process for the preparation of cyclopentadienyltrialkoxy derivatives of the general formulaLTi(OR).sub.3by reaction of cyclopentadienyltrialkoxy trihalide with alcohol in an inert solvent, which is characterized in that the reaction is performed in the presence of alkoxide.

Abstract: The invention relates to compounds of the general formula (1)(R.sup.1 R.sup.2 X.sup.1 Si((R.sup.3).sub.a Cp))((R.sup.4).sub.a Cp)M(X.sup.2).sub.n (1)in whichR.sup.1 and R.sup.2 =independently of one another an alkyl or aryl radical,X.sup.1 =F, Cl, Br, I, p-tolylSO.sub.3 --, F.sub.3 CSO.sub.3 --, F.sub.3 CCO.sub.2 -- or H.sub.3 CCO.sub.2 --,R.sup.3 and R.sup.4 =identical or different alkyl, alkyl ether, aryl or aryl ether groups where 0.ltoreq.a.ltoreq.4,Cp=a cyclopentadienyl, indenyl, tetrahydroindenyl or fluorenyl radical,M=a transistion metal from groups 3-6 (IUPAC notation), in particular Ti, Zr or Hf,X.sup.2 =F, Cl, Br or I,the oxidation number of the transition metal minus 2.Also disclosed is a process of making compounds of formula (1) by reacting the metallocene counterpart thereof with acid HX.sup.1.

Abstract: The invention relates to a new improved process for preparing bridged stereorigid metallocenes via organomagnesium and organotin compounds.

Abstract: The invention relates to a process for preparing biscyclopentadienyl compounds of the general formula(CpR.sub.a).sub.2 --Qby reaction of CpR.sub.a, in a first step, in accordance with the general equation2CpR.sub.a +(R.sup.3 R.sup.4).sub.c Mg.fwdarw.(CpR.sub.a).sub.2 Mg+cR.sup.3 H+cR.sup.4 Hand further reaction in accordance with the general equation(CpR.sub.a).sub.2 Mg+XQX.sup.1 .fwdarw.(CpR.sub.a).sub.2 Q+MgXX.sup.

Abstract: The invention relates to new bridged organotin compounds useful in preparing bridged stereorigid metallocenes via organomagnesium and organotin compounds.

Abstract: The invention relates to a process for preparing alkylaluminoxanes immobilized on inert support materials from alkylaluminum compounds and water, which is characterized in that the reactants are metered with the gas stream into a fluidized-bed reactor and the reaction product is fixed on the support directly from the gas phase.

Abstract: Disclosed is a process for preparing methyltransition metal compounds in which the halide metallocene precursor to be alkylated is initially charged in a hydrocarbon desired for the subsequent application, admixed with an aluminum alkyl and subsequently converted by addition of an inorganic salt into the end product: ##STR1## The reaction solution thus obtained can be freed of precipitated salts by simple filtration and directly used for polymerization, since the dialkylmetallocene is obtained in high purity and yield. If desired, it can also be isolated without problems.

Abstract: Disclosed are processes for the preparation of new bridged cyclopentadienylmagnesium compounds of the general formula Q(CpR.sub.a)(Cp'R'.sub.a ')Mg, and the use thereof for preparing bridged metallocenes.

Abstract: Disclosed are new bridged cyclopentadienylmagnesium compounds of the general formula Q(CpR.sub.a) (Cp'R'.sub.a')Mg, processes for the preparation thereof, and the use thereof for preparing bridged metallocenes.

Abstract: The invention relates to a process for the preparation of alkylaluminoxanes immobilized on inert support materials, characterized in that alkylaluminoxanes present in the form of dispersions are fixed on inert support materials.