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• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F17/00—Metallocenes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
  • C08F110/02—Ethene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/65908—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/65916—Component covered by group C08F4/64 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond

Definitions

• the present invention relates to a transition metal compound and a process for its preparation and its use as a catalyst component in the production of polyolefins.
• Metallocenes and half-sandwich compounds are of great interest not only with regard to the polymerization or oligomerization of olefins. They can also be used as hydrogenation, epoxidation, isomerization and C-C coupling catalysts (Chem. Rev. 1992, 92, 965-994). From WO 96/23004 certain boron-containing transition metal compounds are known.
• transition metal compounds which have sufficient activity with regard to the fields of application described above.
• the object of the present invention is to provide a transition metal compound and an economical and environmentally friendly process for its production.
• radicals R are the same or different and represent a hydrogen atom, a C, -C 20 , preferably C, -C 10 carbon-containing group such as a C r C 10 alkyl or a C 6 -C 10 aryl group and two adjacent radicals R with the atoms connecting them can form a ring system
• Y is a hydrogen atom, a C.
• -C 20 - preferably C ⁇ C ⁇ carbon-containing group such as a C r C 10 alkyl or a C 6 -C 10 aryl group, a halogen atom, an OR 2 -, SR 2 -, NR 2 2 - or - PR 2 2 radical means, wherein R 2 is a halogen atom, a CJ-CJO -carbon-containing group such as a C.-C 10 -, preferably C 2 -C 8 - alkyl group or a C 6 -C 10 aryl group and two Radicals R 2 can form a ring system,
• A is a ⁇ ligand such as cyclopentadienyl, which can be both substituted and unsubstituted and adjacent substituents of the cyclopentadienyl ligand can form a ring
• M is a metal from Group IVb of the Periodic Table of the Elements and X is the same or different and a hydrogen atom, a C.
• .-C ⁇ - carbon-containing group such as a C, -C 20 alkyl, a C ⁇ -C ⁇ alkoxy, a C 6 -C 20 aryl, a C 2 -C 1 2 alkenyl, is a C 7 -C 40 arylalkyl, a C 7 -C 40 alkylaryl, an OH group, a halogen atom or NR 2 2 , n is an integer 1 or 2, m is an integer 0 or 1 and k is an integer from 1 to 3, the sum of n + m + k being 3 or 4.
• L and A can be connected by a bridge. If n is 2, L can be the same or different.
• R X and R y are the same or different and a ⁇ > WWaasssseerrssttooffffaattoomm , is a halogen atom or a C- j -C ⁇ carbon-containing group such as a C r C 20 alkyl, a C 1 -C 10 -Fluoroalkyl-, a C r C 10 alkoxy-, a C 6 -C 14 aryl-, a C 6 -C 10 fluoroaryl-, a C 6 -C ⁇ 0 aryloxy-, a C 2 - C 10 alkenyl,
• bridges are groups (M 2 R x R y ) in which M 2 is carbon, silicon, germanium or tin and R x and R y are identical or different to a C r C 20 hydrocarbon group such as C 1 -C 4 -alkyl or C 6 Are -C 14 aryl and y is 1 or 2, for example CH 2 , CH 2 CH 2 , CH (CH 3 ) CH 2 , C (CH 3 ) (C 6 H 5 ), C (C 6 H 5 ) 2 , CH (C 4 H 9 ) C (CH 3 ) 2 , C (CH 3 ) 2 , C (CH 3 ) (C 6 H 5 ), C (C 6 H 5 ) 2 , (CH 3 ) 2 Si , (CH 3 ) 2 Ge, (CH 3 ) 2 Sn, (C 6 H 5 ) 2 Si, (C 6 H 5 ) (CH 3 ) Si, (C 6 H 5 ) 2 Ge, (C 6 H 5 ) 2 Sn, (CH 6
• the present invention thus relates to a transition metal compound which has at least one substituted or unsubstituted boratabenzene group as the ligand and is described by the formula I.
• a preferred embodiment of the invention is a compound in which M is an element from Group IVb of the Periodic Table of the Elements, in particular zirconium.
• a preferred embodiment of the invention is a compound in which the radicals R are identical and are a hydrogen atom, a C 1 -C 4 alkyl group or a C 6 -C 10 aryl group and Y is a C 1 -C 4 alkyl group or NR 2 2 is in which R 2 is a C r C 4 , preferably C 2 -C 4 alkyl group.
• a preferred embodiment of the invention is a compound in which A is a substituted cyclopentadienyl ligand.
• a preferred embodiment of the invention is a compound in which X is C r C 10 alkyl or NR 2 2 , in which R 2 is a C r C 4 alkyl group, a C 6 -C 10 aryl group or a halogen atom, in particular chlorine .
• A is preferably a ⁇ ligand such as cyclopentadienyl, indenyl or fluorenyl, which can both be substituted or unsubstituted.
• ⁇ ligands are preferably an unsubstituted cyclopentadienyl group or substituted cyclopentadienyl groups which preferably carry one or more C 1 -C 30 -hydrocarbon radicals as residues, for example 2-methylcyclopentadienyl, methyl-tert.-butylcyclopentadienyl, tert.-butylcyclopentadienyl, isopropyl-cyclopentadienyl, dimethyl-cyclopentadienyl , Trimethylethylcyclopentadienyl, 5-phenylcyclopentadienyl, diphenylcyclopentadienyl, indenyl, 2-methylindenyl, 2-ethylindenyl, 3-methylindenyl, 3-tert-butylindenyl, 2-methyl-4-phenylindenyl, 2-ethyl-4-phenylindenyl, 2-methyl- 4-naphth
• L is a boratabenzene ligand of the general formula II and the radicals R are preferably identical and denote a hydrogen atom and Y is preferably a C.-C 4 -alkyl group such as methyl, ethyl, propyl, isopropyl or butyl , or NR 2 2 , in which R 2 is a C. -C ⁇ alkyl group such as methyl, ethyl, propyl, isopropyl or butyl.
• A preferably denotes a cyclopentadienyl ligand such as cyclopentadienyl, methylcyclopentadienyl, pentamethylcyclopentadienyl or indenyl.
• X is identical and a C., -C 4 - Alkyl group, in particular methyl, or a C 7 -C 40 -alkylaryl group, in particular benzyl, or a halogen atom, in particular chlorine and n is 1 or 2, and in the case of n is 1, m is 0 or 1, and at n is 2, m is defined by 0 and the sum of n + m + k can be 3 or 4.
• transition metal compounds according to the invention are:
• the preparation of the transition metal compounds according to the invention with the formula (I) is provided.
• the process is explained in more detail by the synthesis schemes below using compounds of the formulas IV, V and VI.
• R, Y, M and X are as defined in formula I and II.
• A is the same as a ligand such as cyclopentadienyl, indenyl or fluorenyl, which can both be substituted or unsubstituted.
• M 1 is a metal of main group la of the periodic table of the elements.
• a process for preparing a compound of formula (I) is by reacting a compound of general formula (III) with MX, where I is an integer from 3 to 5.
• An alternative method of preparing a compound of formula (I) is by reacting a compound of general formula (V) with A " M 1 + .
• Another alternative method for producing a compound with the general formula (I) is carried out by reacting a compound with the general formula (III) with AMX ⁇ . ⁇
• An alternative method of preparing a compound of general formula (I) is by reacting a compound of general formula (VII) with MX, where I is an integer from 3 to 5 and Z is an element of group IVa of the periodic table of the elements and R 3 are identical or different and is a hydrogen atom, a C 1 -C 20 -group such as a C 1 - C 20 hydrocarbon radical such as a C r C 20 alkyl or a C 6 -C 20 - Aryl group or two adjacent radicals R 3 can form a ring system with the atoms connecting them.
• Z is preferably silicon, germanium, tin or lead and R 3 is the same and particularly preferably a C r C 10 alkyl such as methyl, ethyl, isopropyl or butyl or a C 6 -C 10 aryl group such as phenyl.
• An alternative method of making a compound of formula (I) is by reacting a compound of general formula (VII) with AMX M.
• the compounds of the formulas III and VII can be prepared by methods known from the literature (Organometallics 1995, 14, 471).
• the reaction of the compounds of the formula III to the desired transition metal complexes is known in principle.
• the monoanion of formula III in an inert solvent with the corresponding metal halide such as. B. implemented zirconium tetrachloride.
• A is the same as a ligand such as cyclopentadienyl, indenyl or fluorenyl, which can both be substituted or unsubstituted.
• Suitable solvents for the reaction are aliphatic or aromatic solvents such as hexane or toluene, ethereal solvents such as tetrahydrofuran or diethyl ether or halogenated hydrocarbons such as methylene chloride or halogenated aromatic hydrocarbons such as o-dichlorobenzene.
• the use of the compound of the formula I is provided as a catalyst component in the polymerization of olefins.
• the present invention therefore relates to a process for the preparation of a polyolefin by polymerizing one or more olefins in the presence of a transition metal compound of the formula I.
• polymerization means a homopolymerization and also a copolymerization.
• olefins examples include 1-olefins having 1 to 20 carbon atoms, such as ethylene, propene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene or 1-octene, styrene, cyclic or acyclic Dienes such as 1, 3-butadiene, isoprene, 1, 4-hexadiene, norbornadiene, vinyl norbornene, 5-ethylidene norbornene or cyclic monoolefins such as norbornene or tetracyclododecene.
• 1-olefins having 1 to 20 carbon atoms such as ethylene, propene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene or 1-octene, styrene, cyclic or acyclic Dienes such as 1, 3-butadiene, isoprene, 1, 4-hexadiene, norbornad
• the polymerization is preferably carried out at a temperature of -60 to 250 ° C, preferably 20 to 70 ° C, particularly preferably 50 to 20 ° C.
• the pressure is preferably 0.5 to 2000 bar, particularly preferably 4 to 64 bar, particularly preferably 5 to 64 bar.
• the polymerization can be carried out in solution, in bulk, in suspension or in the gas phase, continuously or batchwise, in one or more stages.
• the catalyst used in the process according to the invention preferably contains a transition metal compound.
• Mixtures of two or more transition metal compounds or mixtures with metallocenes can also be used, e.g. for the production of polyolefins with a broad or multimodal molecular weight distribution.
• any compound is suitable as a cocatalyst in the process according to the invention which, because of its Lewis acidity, can convert the neutral transition metal compound into a cation and stabilize it ("unstable coordination").
• the cocatalyst or the anion formed from it should not undergo any further reactions with the cation formed (EP-A-427 697).
• An aluminum compound and / or a boron compound is preferably used as the cocatalyst.
• the boron compound preferably has the formula R 5 X NH 4.X BR 6 4 , R 5 X PH 4.X BR 6 4 , R 5 3 CBR 6 4 or BR 6 3 , where x is a number from 1 to 4, preferably 3 , means the radicals R 5 are the same or different, preferably the same, and are C 1 -C 10 alkyl or C 6 -C 18 aryl, or two radicals R 5 form a ring together with the atoms connecting them, and the radicals R 6, the same or different, are preferred are the same, and are C 6 -C 18 aryl, which can be substituted by alkyl, haloalkyl or fluorine.
• R 5 represents ethyl, propyl, butyl or phenyl and R 6 represents phenyl, pentafluorophenyl, 3,5-bisstrifluoromethylphenyl, mesityl , Xylyl or tolyl (EP-A-277 003, EP-A-277 004 and EP-A-426638)
• An aluminum compound such as aluminoxane and / or an aluminum alkyl is preferably used as cocatalyst.
• An aluminoxane in particular of the formula VIIa for the linear type and / or of the formula VIIb for the cyclic type, is particularly preferably used as the cocatalyst,
• radicals R 4 are identical or different and are hydrogen or a C 1 -C 20 -hydrocarbon group such as a C, -C 18 -alkyl group, a C 6 -C 18 -aryl group or benzyl and p is a is an integer from 2 to 50, preferably 10 to 35
• R 4 radicals are preferably the same and are hydrogen, methyl, isobutyl, phenyl or benzyl, particularly preferably methyl
• R 4 radicals are different, they are preferably methyl and hydrogen or, alternatively, methyl and isobutyl, hydrogen or isobutyl preferably being present in a proportion of from 0.01 to 40% (of the R 4 radicals)
• the processes for producing the aluminoxanes are known.
• the exact spatial structure of the aluminoxanes is not known (J. Am. Chem. Soc. (1993) 115, 4971). For example, it is conceivable that chains and rings combine to form larger two-dimensional or three-dimensional structures.
• the preactivation of the transition metal compound is preferably carried out in solution.
• the transition metal compound is preferably dissolved in a solution of the aluminoxane in an inert hydrocarbon.
• An aliphatic or aromatic hydrocarbon is suitable as the inert hydrocarbon.
• Toluene is preferably used.
• the concentration of the aluminoxane in the solution is in the range from about 1% by weight to the saturation limit, preferably from 5 to 30% by weight, based in each case on the total amount of solution.
• the transition metal compound can be used in the same concentration, but it is preferably used in an amount of 10 "4 to 1 mol per mol of aluminoxane.
• the preactivation time is from 5 minutes to 60 hours, preferably 5 to 60 minutes.
• the reaction is carried out at a temperature of -78 to 100 ° C, preferably 0 to 70 ° C.
• the transition metal compound is preferably used in a concentration, based on the transition metal, of 10 -3 to 10 "8 , preferably 10 " 4 to 10 "7 mol transition metal per dm 3 solvent or per dm 3 reactor volume.
• the aluminoxane is preferably used in a concentration of 10 "6 to 10 " 1 mol, preferably 10 "5 to 10 " 2 mol per dm 3 solvent or per dm 3 reactor volume.
• the other cocatalysts mentioned are approximately equimolar Amounts used for the transition metal compound. In principle, however, higher concentrations are also possible.
• an aluminum compound preferably an aluminum alkyl, such as trimethyl aluminum or triethyl aluminum
• This cleaning can take place both in the polymerization system itself, or the olefin is brought into contact with the aluminum compound before being added to the polymerization system and then separated off again.
• Hydrogen can be added in the process according to the invention as a molecular weight regulator and / or to increase the catalyst activity.
• low molecular weight polyolefins such as waxes can be obtained.
• the transition metal compound is preferably reacted with the cocatalyst outside the polymerization reactor in a separate step using a suitable solvent. Carrying can be carried out.
• prepolymerization can be carried out using the transition metal compound.
• the (or one of the) olefin (s) used in the polymerization is preferably used.
• the catalyst used in the process according to the invention can be supported.
• the support allows, for example, the grain morphology of the polyolefin produced to be controlled.
• the transition metal compound can be reacted first with the support and then with the cocatalyst.
• the cocatalyst can also first be supported and then reacted with the transition metal compound. It is also possible to slow the reaction product of transition metal compound and cocatalyst.
• Suitable carrier materials are, for example, silica gels, Aluminum oxides, solid aluminoxane or other inorganic carrier materials such as magnesium chloride.
• a suitable carrier material is also a polyolefin powder in finely divided form.
• the supported cocatalyst can be prepared, for example, as described in EP-A-567 952.
• Suitable carrier materials are, for example, silica gels, aluminum oxides, solid aluminoxane or other inorganic carrier materials such as magnesium chloride.
• a suitable carrier material is also a polyolefin powder in finely divided form.
• an inert solvent customary for the Ziegler low-pressure process is used.
• an aliphatic or cycloaliphatic hydrocarbon such as propane, butane, hexane, heptane, isooctane, cyclohexane, methylcyclohexane.
• a gasoline or hydrogenated diesel oil fraction can also be used.
• Toluene can also be used.
• Polymerization is preferably carried out in the liquid monomer.
• Transition metal compound and a supported cocatalyst another aluminum alkyl compound such as trimethyl aluminum, triethyl aluminum, triisobutyl aluminum, trioctyl aluminum or isoprenyl aluminum can be added to the reactor to render the polymerization system inert (for example to separate off existing catalyst poisons in the olefin).
• This is added to the polymerization system in a concentration of 100 to 0.01 mmol AI per kg reactor content.
• Triisobutylaluminum and triethylaluminum are preferred in a concentration of 10 to 0.1 mmol AI per kg reactor content.
• the molar Al / M 1 ratio can be chosen to be small in the synthesis of a supported catalyst system.
• the monomers are preferred added in gaseous or liquid form.
• the special transition metal compounds described in the present invention are suitable for the production of polyolefins. These are particularly suitable for the production of moldings such as foils, sheets or large hollow bodies (e.g. pipes) and can also be used as plasticizer and lubricant formulations, hot melt adhesive applications, coatings, seals, insulation, pouring compounds or sound insulation materials.
• polyolefins of low molecular weight such as waxes
• the hardness or melting point of which can be varied by the comonomer content By choosing the polymerization process and the type of comonomer, as well as the amount of comonomer (s), olefin copolymers with elastomeric properties, e.g. Produce Ethylene / Propylene / 1,4-Hexadiene Terpolymers.
• organometallic compounds were produced and handled with the exclusion of air and moisture under an argon protective gas (Schlenk technique). All required solvents were absolute before use by boiling for several hours over a suitable desiccant and then distilling under argon.
• the AI / CH 3 ratio in the aluminoxane was determined by decomposing the sample with H 2 SO 4 and determining the volume of the hydrolysis gases formed under normal conditions and by complexometric titration of the aluminum in the then completely dissolved sample according to Schwarzenbach.
• the compounds were characterized by 1 H-NMR, 13 C-NMR and IR spectroscopy. Examples
• cyclopentadienyltitanium trichloride 0.57 g are dissolved in 5 ml of tetrahydrofuran and a solution of 0.65 g of 1-methyl-6- (trimethylstannyl) -2,4-boracyclohexanediene in 2 ml of tetrahydrofuran is added at -60 ° C. After the solution was warmed to room temperature, the precipitated dark green crystals were filtered off, yield: 60% (0.4 g).
• cyclopentadienylzirconium trichloride 0.3 g are suspended in 5 ml of toluene and a solution of 0.38 g of 1-methyl-6- (trimethylsilyl) -2,4-boracyclohexanediene in 2 ml of toluene is added at room temperature. After the solution has been heated to 60 ° C. for 3 h, the solution is cooled to -30 ° C. and stored at this temperature for 12 hours. 0.26 g of the yellow compound (70%) is obtained.
• 0.32 g of hafnium tetrachloride are suspended in 5 ml of toluene and a solution of 0.33 g of 1-methyl-6- (trimethylsilyl) -2,4-boracyclohexanediene in 2 ml of toluene is added at room temperature. After the solution has been heated to 70 ° C. for 2 h, the solution is cooled to -30 ° C. and stored at this temperature for 1 2 hours. 0.37 g of the yellow compound (88%) is obtained.
• Catalyst I is bis (1-methylboratabenzodirconium dichloride.
• Catalyst II is d -methylboratabenzod (pentamethylcyclopentadienyl) - zirconium dichloride.
• Catalyst III is
• Examples 9 to 1 3 were carried out as example 8. The deviations from Example 8 are shown in Table 1 below.
• TEDA 1-dimethylaminoboratabenzolithium

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