WO2000031091A1 - Verfahren zur herstellung von monoaryloxy-ansa-metallocenen - Google Patents
Verfahren zur herstellung von monoaryloxy-ansa-metallocenen Download PDFInfo
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- WO2000031091A1 WO2000031091A1 PCT/EP1999/008854 EP9908854W WO0031091A1 WO 2000031091 A1 WO2000031091 A1 WO 2000031091A1 EP 9908854 W EP9908854 W EP 9908854W WO 0031091 A1 WO0031091 A1 WO 0031091A1
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- fluorine
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- indenyl
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- 0 *C1CCCC1 Chemical compound *C1CCCC1 0.000 description 1
- PCEBAZIVZVIQEO-UHFFFAOYSA-N IC1CCCC1 Chemical compound IC1CCCC1 PCEBAZIVZVIQEO-UHFFFAOYSA-N 0.000 description 1
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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
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
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- 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
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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
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F10/04—Monomers containing three or four carbon atoms
- C08F10/06—Propene
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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
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/04—Monomers containing three or four carbon atoms
- C08F110/06—Propene
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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
- C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
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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
- C08F4/65916—Component covered by group C08F4/64 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S526/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S526/943—Polymerization with metallocene catalysts
Definitions
- the present invention relates to a stereoselective synthetic process for the preparation of monoaryloxy-asa metallocenes and their use in the polymerization of olefins.
- Metallocenes can be used as a catalyst component for the polymerization and copolymerization of olefins.
- halogen-containing metallocenes are used as catalyst precursors, which can be converted, for example, by an aluminoxane into a polymerization-active cationic metallocene complex (EP-A-129368).
- Metallocenes are not only of great interest with regard to the polymerization of olefins, they can also be used as hydrogenation, epoxidation, isomerization and C-C coupling catalysts (Chem. Rev., 92 (1992), 965-994).
- metallocenes are known per se (US 4,752,597; US 5,017,714; EP-A-320762; EP-A-416815; EP-A-537686; EP-A-669340; HH Brintzinger et al., Angew. Chem., 107 (1995), 1255; HH Brintzinger et al., J. Organomet. Chem. 232 (1982), 233).
- cyclopentadienyl metal compounds can be reacted with halides of transition metals such as titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, cerium and thorium.
- metallocenes can be obtained, for example, by reacting cyclopentadienes with amides of Group 4 of the Periodic Table of the Elements (PSE) (US 5,597,935; R.F. Jordan et al., Organometallics, 15 (1996), 4030).
- PSE Periodic Table of the Elements
- Ansa metallocene halides are generally used in their racemic form for the production of isotactic polypropylene (i-PP).
- the substituted racemic ansa-bis-indexyl-zirconocene dichlorides have proven to be particularly powerful and thus technically relevant (EP 0485823, EP 0549900, EP 0576970, WO 98/40331).
- These technically interesting metallocene dichlorides are predominantly poorly soluble compounds, which, for example, makes it very difficult to purify these racemic metallocenes by recrystallization.
- the desired substituted racemic ansa-bis-indenyl metallocene dichlorides are usually obtained in their preparation together with the meso forms as 1 to 1 rac / meso diastereomer mixtures, which increases the yields of the desired rac metallocenes are very limited based on the valuable ligand starting compounds.
- the crude products formed in the production also contain inorganic by-products (e.g. salts) and organic by-products (e.g. unreacted substituted cyclopentadienyl ligands).
- the present invention thus relates to a process for the preparation of readily soluble and easily purified monoaryloxy metallocenes of the formula (II), a ligand starting compound (III) being reacted with a transition metal compound of the formula (I), Ar * D y
- M is a metal of III., IV., V. or VI.
- Subgroup of the periodic table of the elements in particular Ti, Zr or Hf, particularly preferably zirconium,
- X is a halogen atom, in particular chlorine,
- Ar is a C 6 -C 4 o-aromatic group, preferably Cg-C 24 aryl, C 5 -C 24 heteroaryl such as pyridyl, furyl or quinolyl, C -C 3 o-alkylaryl, fluorine-containing C6 "" C 24 ⁇ aryl or fluorine-containing C _C 3 o-alkylaryl, particularly preferably a C6 ⁇ Ci 4 aryl group substituted with Ci -C 6 alkyl and / or C ⁇ -Cio aryl residues,
- D is a neutral Lewis base ligand, preferably a linear, cyclic or branched hydrocarbon containing oxygen, sulfur, nitrogen or phosphorus, particularly preferably an ether, polyether, amine or polyamine,
- M2 is Li, Na, K, MgCl, MgBr, Mg or Ca,
- R l are the same or different and Si (R 12 ) 3 , in which R 12 is the same or different is a hydrogenator or a C 1 -C 4 o -carbon-containing group, preferably C 1 -C 2 o -kyl, C 1 -C 8: fluoroalkyl , -C-C 10 alkoxy, C 6 -C 2 o-aryl, C 6 -C ⁇ 0 -fluoroaryl, C ß -Cio-aryloxy, C 2 -C ⁇ 0 -alkenyl, C -C 4 o-arylalkyl, C 7 -C 4 o ⁇ alkylaryl or C 8 -C 4 o-arylalkenyl,
- R 1 is a C ⁇ -C 30 - carbon-containing group, preferably C ⁇ -C 25 alkyl such as methyl, ethyl, tert-butyl, cyclohexyl or octyl, C 2 -C 25 alkenyl, C 3 -C ⁇ 5 -Alkylalkenyl, C 6 -C 24 aryl, C 5 -C 24 heteroaryl, C 7 -C 30 arylalkyl, Is C 7 -C 3 o-alkylaryl, fluorine-containing -C 25 alkyl, fluorine-containing C 6 -C 24 aryl, fluorine-containing C 7 -C 30 arylalkyl or fluorine-containing CC o-alkylaryl,
- radicals R 1 can be connected to one another in such a way that the radicals R 1 and the atoms of the cyclopentadienyl ring which connect them form a C 4 -C 24 ring system which in turn can be substituted,
- R 2 are the same or different and Si (R 12 ) 3 , in which R 12 is the same or different is a hydrogen atom or a C ⁇ C 4 o-carbon-containing group, preferably C 1 -C 2 o ⁇ l yl, C ⁇ -C ⁇ rj-fluoroalkyl , C ⁇ -C ⁇ 0 alkoxy, C 6 -C 14 aryl, C 6 -C ⁇ 0 -Fluo- raryl, C ⁇ -Cio-aryloxy, C 2 -C ⁇ o alkenyl, C 7 -C 40 arylalkyl, C 7 - C 0 alkylaryl or C 8 -C 40 arylalkenyl,
- R 2 is a C ⁇ -C 30 - protean carbon group, preferably C ⁇ -C 2 H 5 alkyl, such as methyl, ethyl, tert-butyl, cyclohexyl or octyl, C 2 -C 25 alkenyl, C 3 -C ⁇ 5 - Alkylalkenyl, C 6 -C 24 aryl, C 5 -C 24 heteroaryl, C 7 -C 30 arylalkyl,
- C 7 -C 30 alkylaryl fluorine-containing -C 5 alkyl, fluorine-containing C6-C 2 4-aryl, fluorine-containing C 7 -C 3 o-arylalkyl or fluorine-containing C 7 _C 3 o-alkylaryl,
- radicals R 2 can be bonded to one another in such a way that the radicals R 2 and the atoms of the cyclopentadienyl ring connecting them form a C 4 -C 24 ring system, which in turn can be substituted,
- x is the oxidation number of M minus 1
- p 1 for metal ions with double positive charge or 2 for metal ions or metal ion fragments with single positive charge
- y is a number between 0 and 2
- B denotes a bridging structural element between the two cyclopentadienyl rings.
- Examples of B are groups M 3 R 13 R 14 , in which M 3 is carbon, silicon, germanium or tin and R 13 and R 14, the same or different, are a C 1 -C 8 -hydrocarbon-containing group such as C 1 -C 1 -alkyl, C 6 -Ci 4 aryl or trimethylsilyl.
- B is preferably CH 2 , CH 2 CH 2 , CH (CH 3 ) CH 2 , CH (C4H9) C (CH 3 ) 2 , C (CH 3 ) 2 , (CH 3 ) 2 Si, (CH 3 ) 5 Ge, (CH 3 ) 2 Sn, (C 6 H 5 ) 2 Si, (C 6 H 5 ) (CH 3 ) Si, Si (CH 3 ) (SiR 20 R 21 R 22 ), (C 6 H 5 ) 2 Ge, (C 6 H 5 ) 2 Sn, (CH 2 ) 4 Si, CH 2 Si (CH 3 ) 2 , oC 6 H 4 or 2, 2 '- (C 6 H 4 ) 2 .
- R 20 R 21 R 22 mean a group containing C 2 -C 10 -hydrocarbon, such as C 10 -C 10 alkyl or C 6 -C: aryl.
- B can also form a mono- or polycyclic ring system with one or more radicals R 1 and / or R 2 .
- Bridged metallocene compounds of the formula (II) are preferably prepared by the process according to the invention in which k is 1 and one or both cyclopentadienyl rings are substituted such that they represent an indenyl ring.
- the indexyl ring is preferably substituted, especially in 2-, 4-,
- the invention further provides a process for the preparation, in particular a process for the stereoselective production, of readily soluble ansa-monoaryloxy-bisindenyl-metallocenes of the formula (VI), a ligand starting compound (V) having a transition metal compound of the formula (Ia) is implemented
- M is Ti, Zr or Hf, particularly preferably zirconium
- Ar is a Cg-C 4 o-carbon-containing aromatic group, preferably Cg-C 24 aryl, C 5 -C 24 heteroaryl such as pyridyl, furyl or quinolyl, C 7 -C 30 alkylaryl, fluorine-containing C 6 -C 24- aryl, or fluorine-containing C 7 -C 3 o -alkylaryl, particularly preferably a C 6 -C 14 -aryl group substituted with C 1 -C 6 -alkyl and / or C 6 -C -o-aryl radicals,
- D is a neutral Lewis-based ligand, preferably a linear, cyclic or branched hydrocarbon material containing oxygen, sulfur, nitrogen or phosphorus, particularly preferably an ether, polyether, amine or polyamine,
- M2 is Li, Na, K, MgCl, MgBr, Mg or Ca,
- R 4 , R 6 are the same or different and a hydrogen atom or a C 1 -C 20 carbon-containing group, preferably Ci-Cis-alkyl, such as methyl, ethyl, isopropyl, n-butyl, isobutyl, cyclohexyl or octyl , C 2 -C 0 -alkenyl, C 3 -C 5 -alkylalkenyl, C 6 -C 8 -aryl, C 5 -C 8 -heteroaryl such as pyridyl, furyl or quinolyl, C 7 -C 2 o-arylalkyl, C 7 -C 2 o-alkylaryl, fluorinated C ⁇ -C ⁇ 2 -alkyl, fluorinated C 6 -C ⁇ 8 -aryl, fluorinated C 7 -C o-arylalkyl or fluorinated C 7 _C 2 is o-alky
- R 5 , R 7 are the same or different and one hydrogen atom or one
- C ⁇ -C 2 o- carbon-containing group preferably Ci-Cis-alkyl, such as methyl, ethyl, n-butyl, cyclohexyl or octyl, C 2 -C ⁇ o-alkenyl, C 3 -C ⁇ 5 alkylalkenyl, C 6 -C ⁇ 8 - Aryl, C 5 -C ⁇ 8 heteroaryl such as pyridyl, furyl or quinolyl, C 7 -C 2 o-arylalkyl, C 7 -C 2 o-alkylaryl, fluorine-containing C 1 -C 12 alkyl, fluorine-containing C 6 -C 8 aryl are fluorine-containing C 7 -C 2 o-arylalkyl or fluorine-containing C _C 2 o ⁇ alkylaryl,
- R 8 and R 9 are the same or different and are a hydrogen atom, halogen atom or a C 1 -C 2 carbon group, preferably a linear or branched C 1 -C 8 alkyl group, such as methyl, ethyl, tert-butyl, cyclohexyl or octyl, C 2 -C 10 alkenyl, C 3 -Ci 5 alkylalkenyl, a C 5 -C 8 aryl group which may optionally be substituted, in particular phenyl, tolyl, xylyl, tert-butylphenyl, ethylphenyl, Di-tert.
- 1, 1 ' identical or different, are an integer between zero and 4, preferably 1 or 2, particularly preferably equal to 1,
- p 1 for metal ions with double positive charge or 2 for metal ions or metal ion fragments with single positive charge
- y is a number between 0 and 2
- B denotes a bridging structural element between the two indenyl residues.
- Examples of B are groups M 3 R 13 R 14 , in which M 3 is carbon, silicon, germanium or tin, preferably carbon and silicon, and R 13 and R 14 are identical or different hydrogen, a C 1 -C 2 -hydrocarbon-containing group such as Ci-Cio-alkyl, c 6 ⁇ Ci 4 aryl or trimethylsilyl mean.
- B is preferably CH 2 , CH 2 CH 2 , CH (CH 3 ) CH 2 , CH (C4H9) C (CH 3 ) 2 , C (CH 3 ) 2 , (CH 3 ) 2 Si, (CH 3 ) 2 Ge, (CH 3 ) 2 Sn, (C 6 H 5 ) 2 C, (C 6 H 5 ) 2 Si, (C 6 H 5 ) (CH 3 ) Si, Si (CH 3 ) (SiR 0 R 1 R 22 ), (C 6 H 5 ) 2 Ge, (C 6 H 5 ) 2 Sn, (CK 2 ) 4 Si, CH 2 Si (CH 3 ) 2 , oC 6 H 4 or 2, 2 '- (C 6 H) 2 • where R 20 R 21 R 22, identical or different C ⁇ -C 2 _ o hydrocarbon-containing group such as Ci-Cio-alkyl or C 6 -C i 4 ⁇ aryl.
- R 20 R 21 R 22 identical or different C ⁇ -C 2 _ o
- Preferred is a process for the production, in particular for the stereoselective production, of readily soluble Ansa-monoaryloxy-bisindenyl-metallocenes of the formula (VI), a ligand starting compound (V) being reacted with a transition metal compound of the formula (Ia),
- M zirconium
- X is chlorine
- Ar is a C 6 -C 3 o-protean carbon aromatic group, preferably one having Ci -C ⁇ alkyl and / or C 6 -C ⁇ 0 aryl substituted C 6 -C ⁇ aryl group, C 5 -C 13 -heteroaryl such as pyridyl , Furyl or quinolyl or fluorine-containing C ß- Cio-aryl, particularly preferably a C ⁇ -Cio-aryl group which in at least one of the two ortho positions to oxygen with a Ci -C ⁇ 0 ⁇ carbon-containing group, such as a Ci -C ⁇ - Alkyl and / or C 6 -C o-aryl group is substituted,
- D is a neutral Lewis base ligand, preferably a
- Ethers polyethers, amines or polyamines, such as, for example, diethyl ether, dibutyl ether, 1, 2-dimethoxyethane, tetrahydrofuran or N, N, N ', N' -tetramethylethylenediamine,
- M2 is Li, Na, K, MgCl, MgBr, Mg or Ca, preferably Li, Na, Mg
- R 4 , R 6 are the same or different and a hydrogen atom or a -CC 2 alkyl group, preferably an alkyl group such as
- R 5 , R 7 are hydrogen atoms
- R 8 and R 9 are identical or different and are a hydrogen atom
- Halogen atom or a C 1 -C 20 carbon-containing group preferably a linear or branched Ci-Cs-alkyl group, such as methyl, ethyl, tert-butyl, cyclohexyl or octyl, C 2 -C 6 alkenyl, C 3 -C 6 -Alkylalkenyl, a C ⁇ -Cig-aryl group which may optionally be substituted, in particular phenyl, tolyl, xylyl, tert-butylphenyl, ethylphenyl, di-tert.
- Ci-Cs-alkyl group such as methyl, ethyl, tert-butyl, cyclohexyl or octyl, C 2 -C 6 alkenyl, C 3 -C 6 -Alkylalkenyl, a C ⁇ -Cig-aryl group which may optionally be substituted, in
- C 7 -C 8 -alkylaryl fluorine-containing C 1 -C 8 -alkyl, fluorine-containing C 6 -C 8 -aryl, fluorine-containing C 7 -C 2 -arylalkyl or fluorine-containing C_Ci 2 -alkylaryl,
- 1, 1 ' is an integer between zero and 4, preferably 1 or 2, particularly preferably equal to 1,
- p 1 for metal ions with double positive charge or 2 for metal ions or metal ion fragments with single positive charge
- y is a number between 0 and 2
- B denotes a bridging structural element between the two indenyl radicals, B preferably being (CH 3 ) 2 Si, (CH 3 ) 2 Ge, (C 6 H 5 ) 2 Si, CH 2 CH 2 , CH 2 , C (CH 3 ) 2 ,
- (C 6 H 5 ) C is, particularly preferably (CH 3 ) 2 Si, CH 2 and CH 2 CH 2 .
- the Ansa-monoaryloxy-bisindenyl-metallocenes of the formula (IV), the pseudo-rac form, is preferably formed over the corresponding pseudo-meso form if specially substituted aryloxy radicals are used in the transition metal compound of the formula (Ia),
- M is Ti, Zr or Hf, particularly preferably zirconium,
- X is a halogen atom, in particular chlorine,
- D is a neutral Lewis base ligand, preferably a linear, cyclic or branched hydrocarbon containing oxygen, sulfur, nitrogen or phosphorus, particularly preferably an ether, polyether, amine or polyamine,
- R 3a is halogen or Si (R 1 ) 3 , in which R 12, identically or differently, represents a hydrogen atom or a C 1 -C 4 -carbon-containing group, preferably C 1 -C 4 alkyl, Cx 1 -C 4 alkoxy, C 6 -C 10 aryl, C 6 -C 10 -Fluoraryl, C 6 -C ⁇ 0 aryloxy, C 2 -C 10 -Alke- nyl, C 7 -C ⁇ -arylalkyl or C 7 -C ⁇ 4 alkylaryl,
- R 3a is a C 1 -C 30 carbon-containing group, preferably C 1 -C 25 -alkyl, such as methyl, ethyl, isopropyl, tert-butyl, cyclohexyl or octyl, C 2 -C 25 -alkenyl, C 3 - C 5 -alkylene lalkenyl, C 6 -C 24 aryl, C 5 -C 24 heteroaryl, C ⁇ -C ⁇ 0 alkyloxy, C6 _ C ⁇ o-aryloxy, C 7 -C3o-arylalkyl, C 7 -C3o-alkylaryl, fluorine- containing C 1 -C 25 _ alkyl, fluorine-containing Ce-C 24 aryl, fluorine-containing C 7 -C 3 o-arylalkyl or fluorine-containing C 7 _C 3 o ⁇ alkylaryl,
- R 3b to R 3e are identical or different hydrogen, halogen or a C 1 -C 30 carbon-containing group, preferably C 1 -C 25 -alkyl, such as methyl, ethyl, isopropyl, tert-butyl, cyclohexyl or octyl , C 2 -C 25 alkenyl, C 3 -Ci 5 alkylalkenyl, C 6 -C 24 aryl, C 5 -C 4 heteroaryl, C ⁇ -C ⁇ 0 alkyloxy, C 6 -C ⁇ 0 aryloxy, C 7th -C 3 o-arylalkyl, C 7 -C 30 alkylaryl, fluorine-containing C ⁇ -C 25 alkyl, fluorine-containing C 6 -C 24 aryl, fluorine-containing C -C 3 o-arylalkyl or fluorine-containing C 7 _C 3 are o-alkylaryl, or two or
- the preferred formation (stereoselective reaction) of the pseudo-rac form (IV) over the pseudo-meso form (IVa) means that the ratio of pseudo-rac / pseudo-meso in the crude metallocene product after synthesis is greater than 1, is preferably greater than 2, particularly preferably greater than 4 and very particularly preferably greater than 8.
- M is zirconium
- X is chlorine
- D is a neutral oxygen or nitrogen-containing Lewis base ligand, preferably an ether, polyether, amine or polyamine, such as, for example, diethyl ether, di-butyl ether, 1, 2-dimethoxyethane, tetrahydrofuran or N, N, N ', N' -tetramethylethylenediamine
- R 3a halogen or a C ⁇ -C ⁇ o - carbon-containing group, preferably C ! -C 8 alkyl, such as methyl, ethyl, isopropyl, tert-butyl, cyclohexyl or octyl, C 2 -C 8 alkenyl, C 3 -C 8 alkylalkenyl, C 6 -C 10 aryl, C 5 -cg-heteroaryl, C ⁇ -C 4 -alkyloxy, C 6 -aryloxy, C 7 -C ⁇ 0 arylalkyl, C 7-alkylene -C ⁇ o laryl is
- R 3b to R 3e are hydrogen, halogen or a Ci-Cio - carbon-containing group, preferably C 1 -C 8 -alkyl, such as methyl, ethyl, isopropyl, tert-butyl, cyclohexyl or octyl, C 2 -C 8- alkenyl, C 3 -C 8 ⁇ alkylalkenyl, C 6 -C 10 aryl, C 5 -C 9 heteroaryl, -C-C-alkyloxy, C 6 -aryloxy,
- radicals R 3a to R 3e can be bonded to one another in such a way that the radicals R 3 and the atoms of the benzene ring connecting them are C 4 to C 8 ring system, which in turn can be substituted, and
- y is a number between 0 and 2.
- M zirconium
- X is chlorine
- D is tetrahydrofuran, 1, 2-dimethoxyethane or N, N, N ', N' -Tetra - methylethylenediamine,
- R 3a is chlorine, bromine or a C ⁇ -C ⁇ 0 - carbon-containing group, preferably C ⁇ -C 6 alkyl, such as methyl, ethyl, iso-propyl, tert-butyl or cyclohexyl, C 2 -C alkenyl, C 6 -C ⁇ o -Aryl, is R 3b to R 3d, identical or different, are hydrogen, chlorine, bromine or a Ci-Cio - carbon-containing group, preferably C 1 -C 6 -alkyl, such as methyl, ethyl, isopropyl, tert-butyl or cyclohexyl, C 2 -C 4 -Alkenyl, C ⁇ -Cio-aryl, or two or more radicals R 3a to R 3e can be connected to one another in such a way that the radicals R 3 and the atoms of the benzene ring connecting them form a C 4 to C 5 ring system
- y is a number between 0 and 2.
- transition metal compounds of the formulas (I) and (Ia) are known in principle from the literature (M. Mitani et al., Polymer Bulletin 34 (1995), pages 199 to 202; H. Yasuda et al., J. Organomet. Chem 493 (1994), pages 105 to 116).
- the display can be done in two ways:
- an alkali or alkaline earth aryloxy salt is used directly with a tetrahalide of subgroup 4 of the periodic system of the elements, such as titanium, zirconium or hafnium tetrachloride, advantageously in the form of the bis-THF adduct to form the compound ( Ia) implemented.
- the alkali or alkaline earth aryloxy salt is first reacted with a silyl chloride, such as trimethylsilyl chloride, to give the silyl ether which, after possible isolation, is then treated with a tetrahalide of the 4th subgroup of the perio- densystems of the elements, such as titanium, zirconium or hafnium tetrachloride, is advantageously implemented in the form of the bis-THF adduct to the compound (Ia).
- a silyl chloride such as trimethylsilyl chloride
- transition metal compounds of the formulas (I) and (Ia) can generally be obtained by crystallization after the salts (M 2 X) formed have been separated off and / or the substituted chlorosilane has been removed.
- the alkali metal or alkaline earth metal aryloxy salts can be prepared by deprotonating the corresponding hydroxyaromatic compounds with a suitable base, such as, for example, butyllithium, methyllithium, sodium hydride, potassium hydride, sodium, potassium or Grignard compounds in an inert solvent or solvent mixture
- a suitable base such as, for example, butyllithium, methyllithium, sodium hydride, potassium hydride, sodium, potassium or Grignard compounds in an inert solvent or solvent mixture
- Non-limiting examples of suitable inert solvents are aliphatic or aromatic hydrocarbons such as, for example, benzene, toluene, xylene, mesitylene, ethylbenzene, chlorine.
- ethers such as diethyl ether, di-n-butyl ether, tert.-butyl methyl ether (MTBE), tetrahydrofuran (THF ), 1, 2-dimethoxyethane (DME), anisole, triglyme, dioxane and any mixtures of those substances.
- Non-limiting examples of solvent mixtures are toluene, hexane, heptane, xylene, tetrahydrofuran (THF), dimethoxyethane (DME), toluene / THF, heptane / DME or toluene / DME.
- the reactions are carried out in a temperature range from -78 to 30 150 ° C., preferably 0 to 110 ° C.
- hydroxyaromatics which can be used to prepare the transition metal compounds of the formula (I) 35 and (Ia) which can be used in the processes according to the invention are:
- 2-tert-butyl-4-ethylphenol 2, 6-diisopropylphenol; 4-octylphenol; 4- (1, 1, 3, 3-tetramethylbutyl) phenol; 2,6-di-tert. -butyl-4-ethylphenol; 4-sec-butyl-2, 6-di-tert. -butylphenol; 4-dodecylphenol; 2,4,6-tri-tert. -butylphenol; 3- (pentadecyl) phenol;
- the transition metal compounds of the formulas (I) and (Ia) can be used in isolated form or as they are obtained as a solution or suspension after their preparation.
- the reactive by-products which are disruptive in the further reaction, such as trimethylchlorosilane, should be removed before the reaction with the substituted cyclopentadienyl anions.
- transition metal compounds of the formula (Ia) which can be used for the preparation, in particular for the stereoselective production, of the metallocenes of the formula (IV) are:
- metalloces can be produced by the processes according to the invention, for example bridged or unbridged biscyclopentadienyl complexes, such as those e.g. in EP 129 368, EP 561 479, EP 545 304 and EP 576 970, monocyclopentadienyl complexes such as bridged amidocyclopentadienyl complexes, e.g.
- EP 416 815 polynuclear cyclopentadienyl complexes as described in EP 632 063, ⁇ -ligand-substituted tetrahydropentalenes as described in EP 659 758 or ⁇ -ligand-substituted tetrahydroindenes as described in EP 661 300.
- metallocenes which can be obtained as diastereomers in their synthesis are preferably prepared by the processes according to the invention, with Ansa metal locenes of the formula (IV) being particularly preferred.
- the ligand starting compounds (V) used in the process according to the invention for the stereoselective production of readily soluble monoaryloxy-bisindenyl-metallocenes of the formula (IV) are prepared by double deprotonation of the corresponding bisindenyl compound (Va) in an inert solvent or solvent mixture.
- Non-limiting examples of suitable bases are organolithium compounds such as n-butyllithium, sec. -Butyllithium, tert. - Butyllithium, methyllithium, organomagnesium compounds, alkali metals such as sodium, potassium, alkali metal hydrides such as sodium hydride, potassium hydride or alkali metal amides such as lithium amide, Na triumamide, potassium amide, lithium hexamethyl disilazide, sodium hexamethyl disilazide, potassium hexamethyl disilazide, lithium diisopropylamide or lithium diethylamide.
- organolithium compounds such as n-butyllithium, sec. -Butyllithium, tert. - Butyllithium, methyllithium, organomagnesium compounds, alkali metals such as sodium, potassium, alkali metal hydrides such as sodium hydride, potassium hydride or alkali metal amides such as
- Suitable inert solvents are aliphatic or aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene, ethylbenzene, chlorobenzene, dichlorobenzene, fluorobenzene, decalin, tetralin, pentane, hexane, cyclohexane, heptane, 1,2-dichloroethane, dichloromethane, Ethers such as diethyl ether, di-n-butyl ether, tert-butyl methyl ether (MTBE), tetrahydrofuran (THF), 1,2-dimethoxyethane (DME), anisole, triglyme, dioxane and any mixtures of those substances.
- benzene toluene, xylene, mesitylene, ethylbenzene, chlorobenzene, dichlorobenzene, fluorobenzene
- Solvents or solvent mixtures are preferred in which the subsequent conversion to the metallocene complex of the formula (IV) can also be carried out directly.
- Non-limiting examples include toluene, hexane, heptane, xylene, tetrahydrofuran (THF), dimethoxyethane (DME), toluene / THF, heptane / DME or toluene / DME.
- the deprotonation of the bridged bisindenyl ligands of the formula (Va) is carried out in a temperature range from -78 to 150 ° C., preferably in a temperature range from 0 to 110 ° C.
- the molar ratio between the suitable bases described above and the bridged bisindenyl ligands of the formula (Va) is generally between 10 and 0.1, preferably between 4 and 0.5, particularly preferably between 3 and 0.8.
- bisindenyl ligands such as those described in EP-A-0485823, EP-A-0549900, EP-A-0576970, WO 98/22486 and WO 98/40331 can be used for the preparation of the corresponding metallocendi-chlorides to be discribed.
- the bridged bisindenyl ligands of the formula (Va) can either be used as isolated starting products in the process according to the invention, or they can be used in the process according to the invention without prior isolation as crude products, as are obtained in their synthesis.
- Such a one-pot process for the production of metallocene dichlorides is described in DE 44 34 640.
- the metallocenes of the formula (IV) are prepared by reacting the ligand starting compounds of the formula (V) with transition metal compounds of the formula (Ia) in such an inert solvent or solvent mixture, which also includes the deprotonation of the substituted cyclopentadiene derivatives can be carried out.
- Suitable inert solvents are aliphatic or aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene, ethylbenzene, chlorobenzene, dichlorobenzene, fluorobenzene, decalin, tetralin, pentane, hexane, cyclohexane, heptane, 1,2-dichloroethane, dichloromethane, Ethers such as diethyl ether, di-n-butyl ether, tert-butyl methyl ether (MTBE), tetrahydrofuran (THF), 1,2-dimethoxyethane (DME), anisole, triglyme, dioxane and any mixtures of those substances.
- benzene toluene, xylene, mesitylene, ethylbenzene, chlorobenzene, dichlorobenzene, fluorobenzene
- Solvents or solvent mixtures in which the metallation of the ligand starting compound of the formula (Va) and the subsequent conversion to the metallocene complex of the formula (IV) can be carried out are preferred.
- Non-limiting examples include toluene, hexane, heptane, xylene, tetrahydrofuran (THF), dimethoxyethane (DME), toluene / THF, heptane / DME or toluene / DME.
- the reaction of the ligand starting compounds of the formula (V) with the transition metal compounds of the formula (Ia) for the preparation of the metallocenes of the formula (IV) by the processes according to the invention is generally carried out in a temperature range from -78 to 150 ° C., preferably in a temperature range from 0 to 110 ° C, particularly preferably at a temperature between 20 and 60 ° C.
- the molar ratio between the transition metal compounds of the formula (Ia) and the ligand precursors of the formula (V) in the processes according to the invention is generally between 10 and 0.1, preferably between 2 and 0.5.
- the concentration of ligand precursors of the formula (V) in the reaction mixture is generally between 0.0001 mol / 1 and 8 mol / 1, preferably in the range 0.01 mol / 1 and 3 mol / 1, particularly preferably between 0.1 mol / 1 and 2 mol / 1.
- the reaction time is generally between 5 minutes and 1 week, preferably in the range between 15 minutes and -24 hours.
- the metallocenes of the formulas (II) and (IV) formed in the process according to the invention are notable for the fact that they have a significantly better solubility in inert organic solvents than the corresponding metallocene chlorides.
- a significantly better solubility is said to mean that the molar concentrations in the organic solvent at least double, preferably more than fourfold and very particularly preferably more than eightfold.
- Illustrative but non-limiting examples of the metallocenes of the formula (IV) obtainable in the stereoselective process according to the invention are:
- zirconium monochloro-mono- (2, 6-dimethyl-phenolate) in the above list are the meaning
- easy-to-clean metallocene catalyst components in particular of the formula (IV) can be prepared stereoselectively, which in the same way as the complex-to-clean, Ansa-bisindenylzirconium dichloride accumulating as Rac / Meso 1: 1 mixtures as catalyst component in the propylene polymerization can be used.
- the metallocenes of the formulas (II) and (IV) obtainable in the process according to the invention are particularly suitable as a constituent of catalyst systems for the preparation of polyolefins by polymerizing at least one olefin in the presence of a catalyst which comprises at least one cocatalyst and at least one metallocene.
- polymerization is understood to mean homopolymerization as well as copolymerization.
- Ethylene or propylene are preferably homopolymerized, or ethylene is copolymerized with one or more cyclic olefins, such as norbornene, and / or one or more dienes having 4 to 20 carbon atoms, such as 1,3-butadiene or 1,4-hexadiene .
- cyclic olefins such as norbornene
- dienes having 4 to 20 carbon atoms, such as 1,3-butadiene or 1,4-hexadiene .
- Examples of such copolymers are ethylene / norbornene copolymers, ethylene / propylene copolymers and ethylene / propylene / 1,4-hexadiene copolymers.
- the metallocenes of the formulas (II) and (IV) obtained in the process according to the invention show, compared to the dihalogen compounds, at least equivalent, but in some cases higher, activities in the polymerization of olefins, and the polyolefins obtained show a reduction in the undesirable ones low molecular weight extractable fractions.
- the polymerization is carried out at a temperature of from -60 to 300 ° C., preferably from 50 to 200 ° C., very particularly preferably from 50 to 80 ° C.
- the pressure is 0.5 to 2000 bar, 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.
- a preferred embodiment is gas phase and bulk polymerization.
- the catalyst used preferably contains one of the metallocene compounds obtainable in the process according to the invention. Mixtures of two or more metallocene compounds can also be used, e.g. B. for the production of polyolefins with broad or multimodal molecular weight distribution.
- the cocatalyst which, together with a metallocenes of the formulas (II) and (IV) obtainable in the process according to the invention, forms the catalyst system contains at least one compound of the type of an aluminoxane or a Lewis acid or an ionic compound, which by reaction with a metallocene converts this into a cationic compound.
- a compound of the general formula (VII) is preferred as the aluminoxane
- aluminoxanes can e.g. cyclic as in formula (VIII)
- radicals R in the formulas (VII), (VIII), (IX) and (X) can be the same or different and a -C-C 2 o-hydrocarbon group such as a Ci-C ⁇ -alkyl group, a C 6 -Ci 8 -Aryl group, benzyl or hydrogen, and p is an integer from 2 to 50, preferably 10 to 35.
- radicals R are different, they are preferably methyl and hydrogen, methyl and isobutyl or methyl and n-butyl, with hydrogen or isobutyl or n-butyl preferably containing 0.01-40% (number of the radicals R).
- the aluminoxane can be prepared in various ways by known methods.
- One of the methods is, for example, that an aluminum-hydrocarbon compound and / or a hydrodaluminum-hydrocarbon compound is reacted with water (gaseous, solid, liquid or bound - for example as water of crystallization) in an inert solvent (such as, for example, toluene).
- the Lewis acid used is preferably at least one organoboron or organoaluminum compound which contains Cx-C ⁇ carbon-containing groups, such as branched or unbranched alkyl or haloalkyl, such as methyl, propyl, isopropyl, isobutyl, trifluoromethyl, unsaturated groups, such as Aryl or haloaryl, such as phenyl, tolyl, benzyl groups, p-fluorophenyl, 3, 5-difluorophenyl, pentachlorophenyl, pentafluorophenyl, 3,4,5 trifluorophenyl and 3,5 di (trifluoromethyl) phenyl.
- organoboron or organoaluminum compound which contains Cx-C ⁇ carbon-containing groups, such as branched or unbranched alkyl or haloalkyl, such as methyl, propyl, isopropyl, isobutyl, trifluoromethyl, uns
- Lewis acids are trimethyl aluminum, triethyl aluminum, triisobutyl aluminum, tributyl aluminum, trifluoroborane, triphenylborane,
- Compounds which contain a non-coordinating anion such as, for example, tetrakis (pentafluorophenyl) borates, tetraphenylborates, SbF 6 ", CF 3 SO 3 " or CIO 4 ", are preferably used as ionic cocatalysts.
- a non-coordinating anion such as, for example, tetrakis (pentafluorophenyl) borates, tetraphenylborates, SbF 6 ", CF 3 SO 3 " or CIO 4 ".
- Protonated Lewis bases such as e.g.
- methylamine aniline, dimethylamine, diethylamine, N-methylaniline, diphenylamine, N, N-dimethylaniline, trimethylamine, triethylamine, tri-n-butylamine, methyldiphenylamine, pyridine, p-bromo-N, N-dimethylaniline, p-nitro-N , N-dimethylaniline, triethylphosphine, triphenylphosphine, diphenylphosphine, tetrahydrothiophene or the triphenylcarbenium.
- Trimethylammonium tetra (tolyl) borate Trimethylammonium tetra (tolyl) borate
- N, N-Dimethylanilinium tetrakis (pentafluorophenyl) borate N, N-Dimethylanilinium tetrakis (pentafluorophenyl) borate.
- Mixtures of at least one Lewis acid and at least one ionic compound can also be used.
- Borane or carborane compounds such as e.g.
- Tri (butyl) ammonium-l-trimethylsilyl-l-carbadecaborate “tri (butyl) ammonium bis (nonahydrid-1,3-dicarbonnonaborate) cobaltate (III),
- the carrier component of the catalyst system can be any organic or inorganic, inert solid, in particular a porous carrier such as talc, inorganic oxides and finely divided polymer powders (for example polyolefins).
- Suitable inorganic oxides can be found in groups 2,3,4,5,13,14,15 and 16 of the periodic table of the elements.
- preferred oxides as carriers include silicon dioxide, aluminum oxide, and mixed oxides of the two elements and corresponding oxide mixtures.
- Other inorganic oxides that can be used alone or in combination with the last-mentioned preferred oxide carriers are, for example, MgO, Zr0 2 , Ti0 2 or B 2 0 3 , to name just a few.
- the carrier materials used have a specific surface area in the range from 10 to 1000 m 2 / g, a pore volume in the range from 0.1 to 5 ml / g and an average particle size from 1 to 500 ⁇ m.
- Carriers with a specific surface area in the range from 50 to 500 m 2 / g, a pore volume in the range between 0.5 and 3.5 ml / g and an average particle size in the range from 5 to 350 ⁇ m are preferred.
- Carriers with a specific surface area in the range from 200 to 400 m 2 / g, a pore volume in the range between 0.8 to 3.0 ml / g and an average particle size of 10 to 200 ⁇ m are particularly preferred.
- the carrier material used naturally has a low moisture content or residual solvent content, dehydration or drying can be avoided before use. If this is not the case, as is the case when using silica gel as the carrier material, dehydration or drying is recommended.
- the thermal dehydration or drying of the carrier material can take place under vacuum and at the same time inert gas blanket (e.g. nitrogen).
- the drying temperature is in the range between 100 and 1000 ° C, preferably between 200 and 800 ° C. In this case, the pressure parameter is not critical.
- the drying process can take between 1 and 24 hours. Shorter or longer drying times are possible, provided that under the chosen conditions the equilibrium can be established with the hydroxyl groups on the support surface, which normally requires between 4 and 8 hours.
- Dehydration or drying of the carrier material is also possible chemically by reacting the adsorbed water and the hydroxyl groups on the surface with suitable inerting agents.
- suitable inerting agents Through the reaction with the inerting reagent, the hydroxyl groups can be completely or can also be partially converted into a form that does not lead to any negative interaction with the catalytically active centers.
- Suitable inerting agents are, for example, silicon halides and silanes, such as silicon tetrachloride, chlorotrimethylsilane, dimethylaminotrichlorosilane or organometallic compounds of aluminum, boron and magnesium, such as, for example, trimethylaluminium, triethylaluminium, triisobutylaluminum, triethylborane, di-butylmagnesium.
- the chemical dehydration or inertization of the carrier material is carried out, for example, by reacting a suspension of the carrier material in a suitable solvent with the inerting reagent in pure form or dissolved in a suitable solvent with exclusion of air and moisture.
- Organic carrier materials such as finely divided polyolefin powders (e.g. polyethylene, polypropylene or polystyrene) can also be used and should also be freed of adhering moisture, solvent residues or other contaminants by appropriate cleaning and drying operations before use.
- polyolefin powders e.g. polyethylene, polypropylene or polystyrene
- the catalyst system is produced by at least one metallocene, at least one cocatalyst and at least one .
- an inertized carrier can be mixed.
- At least one of the above-described metallocene components obtainable in the process according to the invention is in a suitable solvent with at least one cocatalyst component
- the preparation thus obtained is then mixed with the dehydrated or inertized carrier material, the solvent is removed and the resulting supported metallocene catalyst system is dried to ensure that the solvent is wholly or largely from the pores of the carrier material. rials is removed.
- the supported catalyst is obtained as a free-flowing powder.
- a method for the preparation of a free-flowing and optionally prepolymerized supported catalyst system comprises the following steps:
- a metallocene / cocatalyst mixture in a suitable solvent or suspending agent, the metal - locen component, obtainable from the process according to the invention, having the structures described above.
- b) applying the metallocene / cocatalyst mixture to a porous, preferably inorganic, dehydrated carrier c) removing the main proportion of solvent from the resulting mixture d) isolating the supported catalyst system e) optionally pre-polymerizing the obtained supported catalyst system with one or more olefinic monomers (s) to obtain a prepolymerized supported catalyst system.
- Preferred solvents for the production of the metallocene / cocatalyst mixture are hydrocarbons and hydrocarbon mixtures which are liquid at the selected reaction temperature and in which the individual components preferably dissolve.
- the solubility of the individual components is not a prerequisite if it is ensured that the reaction product of metallocene and cocatalyst components is soluble in the chosen solvent.
- suitable solvents include alkanes such as pentane, isopentane, hexane, heptane, octane, and nonane; Cycloalkanes such as cyclopentane and cyclohexane; and aromatics such as benzene, toluene. Ethylbenzene and diethylbenzene. Toluene is very particularly preferred.
- a molar ratio of aluminum to transition metal in the metallocene of 10: 1 to 1000: 1 is preferably set, very particularly preferably a ratio of 50: 1 to 500: 1.
- toluene solutions 30% toluene solutions are preferably used; the use of 10% solutions is also possible.
- the metallocene is dissolved in the form of a solid in a solution of the aluminoxane in a suitable solvent. It is also possible to dissolve the metallocene separately in a suitable solvent and then to combine this solution with the aluminoxane solution.
- Toluene is preferably used.
- the preactivation time is 1 minute to 200 hours.
- the preactivation can take place at room temperature (25 ° C).
- room temperature 25 ° C
- the use of higher temperatures can shorten the time required for preactivation and cause an additional increase in activity.
- a higher temperature means a range between 50 and 100 ° C.
- the preactivated solution or the metallocene / cocatalyst mixture is then rinsed with a. inert carrier material, usually silica gel, which is in the form of a dry powder or as a suspension in one of the abovementioned solvents.
- a. inert carrier material usually silica gel, which is in the form of a dry powder or as a suspension in one of the abovementioned solvents.
- the carrier material is preferably used as a powder.
- the order of addition is arbitrary.
- the preactivated metallocene cocatalyst solution or the metallocene cocatalyst mixture can be metered into the support material provided, or the support material can be introduced into the solution presented.
- the volume of the preactivated solution or of the metallocene / cocatalyst mixture can exceed 100% of the total pore volume of the support material used or can be up to 100% of the total pore volume.
- the temperature at which the preactivated solution or the metal-locene-cocatalyst mixture is brought into contact with the support material can vary in the range between 0 and 100 ° C. However, lower or higher temperatures are also possible.
- the solvent is then completely or largely removed from the supported catalyst system, and the mixture can be stirred and optionally also heated. Both the visible portion of the solvent and the portion in the pores of the carrier material are preferably removed.
- the solvent can be removed in a conventional manner using vacuum and / or purging with inert gas. During the drying process, the mixture can be heated until the free solvent has been removed, which usually requires 1 to 3 hours at a preferably selected temperature between 30 and 60 ° C.
- the free solvent is the visible proportion of solvent in the mixture. Residual solvent is the proportion that is enclosed in the pores.
- the supported catalyst system can also be dried only to a certain residual solvent content, the free solvent having been removed completely.
- the supported catalyst system can then be washed with a low-boiling hydrocarbon such as pentane or hexane and dried again.
- the supported catalyst system shown can either be used directly for the polymerization of olefins or prepolymerized with one or more olefinic monomers before it is used in a polymerization process.
- the prepolymerization of supported catalyst systems is described, for example, in WO 94/28034.
- an olefin preferably an ⁇ -olefin (for example styrene or phenyldimethylvinylsilane) as an activity-increasing component, or for example an antistatic agent, can be added during or after the preparation of the supported catalyst system.
- an olefin preferably an ⁇ -olefin (for example styrene or phenyldimethylvinylsilane) as an activity-increasing component, or for example an antistatic agent
- a mixture of a metal salt of medialanic acid, a metal salt of anthranilic acid and a polyamine is usually used as the antistatic.
- antistatic agents are described, for example, in ⁇ P-A-0, 636, 636.
- the molar ratio of additive to metallocene component compound (I) is preferably between 1: 1000 to 1000: 1, very particularly preferably 1:20 to 20: 1.
- the present invention also relates to a process for the preparation of a polyolefin by polymerizing one or more olefins in the presence of the catalyst system comprising at least one transition metal component of the formula (II) or (IV) according to the invention, which is obtainable in the process according to the invention.
- the term polymerisation is understood to mean homopolymerization as well as copolymerization.
- the metallocenes of the formulas (II) and (IV) obtained in the processes according to the invention show, compared to the dihalogen compounds, at least equivalent, but in some cases higher, activities in the polymerization of olefins, and the polymers obtained olefins show a reduction in the undesirable low molecular weight extractables.
- the catalyst system shown can be used as the only catalyst component for the polymerization of olefins having 2 to 20 carbon atoms, or preferably in combination with at least one alkyl compound of the elements from I. to III.
- Main group of the periodic table e.g. an aluminum, magnesium or lithium alkyl or an aluminoxane can be used.
- the alkyl compound is added to the monomers or the suspending agent and is used to purify the monomers from substances which can impair the catalyst activity. The amount of alkyl compound added depends on the quality of the monomers used.
- hydrogen is added as a molecular weight regulator and / or to increase the activity.
- the antistatic can be metered into the polymerization system together with or separately from the catalyst system used.
- the polymers represented with the catalyst system which contains at least one of the metallocenes of the formulas (II) and (IV) obtained in the process according to the invention, have a uniform grain morphology and have no fine grain proportions. No deposits or caking occur during the polymerization with the catalyst system.
- the triad tacticity is calculated using the following formula:
- RI (%) 0.5 I ⁇ , ß (I ⁇ , ⁇ + I ⁇ , ß + i ⁇ , ⁇ ) • 100,
- I ⁇ , ß the sum of the intensities of the resonance signals at ⁇ ⁇ 30.13, 32.12, 35.11 and 35.57 ppm such as
- the isotactic polypropylene which was produced with the catalyst system, is characterized by a proportion of 2-1-inserted propene units RI ⁇ 0.5% with a triad tacticity TT> 98.0% and a melting point> 153 ° C, where M w / M n of the polypropylene according to the invention is between 2.5 and 3.5.
- copolymers which can be prepared with the catalyst system are distinguished by a significantly higher molar mass than in the prior art. At the same time, such copolymers can be produced with high productivity and technically relevant process parameters without deposit formation by using the catalyst system.
- the polymers produced by the process are particularly suitable for the production of tear-resistant, hard and rigid moldings such as fibers, filaments, injection molded parts, foils, plates or large hollow bodies (e.g. pipes).
- reaction mixture was filtered through Celite, the filter cake extracted with a total of 125 ml of hot toluene, and the filtrate was concentrated to about 70 ml. After crystallization at -30 ° C, the yellow crystalline precipitate was isolated by filtration, washed with a little cold toluene and dried in vacuo. 3.2 g (44%) (3) were obtained.
- Example 3a Catalyst representation with (3) and polymerization:
- a dry 21 reactor was first flushed with nitrogen and then with propylene and filled with 1.5 l of liquid propylene. 2 ml of TEA (20% in Varsol) were added and the mixture was stirred for 15 minutes. The catalyzed product prepared above was then
- reaction mixture was filtered through Celite, the filter cake was extracted with a total of 75 ml of hot toluene, the filtrate was concentrated and, after crystallization at -30 ° C., a yellow crystalline precipitate was isolated by filtration, which was washed with a little cold toluene and dried in vacuo. 2.0 g (39%) (4) were obtained.
- reaction mixture was filtered through Celite, the filter cake was extracted with a total of 80 ml of hot toluene, the filtrate was concentrated and, after crystallization at -30 ° C., a yellow crystalline precipitate was isolated by filtration, which was washed with a little cold toluene and dried in vacuo. 0.7 g (46%) (7) were obtained.
- the filter cake was extracted with a total of 150 ml of hot toluene, the filtrate was concentrated to about 20 ml, and after crystallization at 5 ° C., a yellow crystalline precipitate was isolated by filtration, which was washed with a little cold toluene and dried in vacuo. 2.66 g (47%) (8) were obtained.
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Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US09/856,041 US6620953B1 (en) | 1998-11-25 | 1999-11-18 | Method for producing monoaryloxy-ansa-metallocenes |
JP2000583919A JP2002530416A (ja) | 1998-11-25 | 1999-11-18 | モノアリールオキシ−アンサ−メタロセン |
BRPI9915708-0A BR9915708B1 (pt) | 1998-11-25 | 1999-11-18 | processo para preparação de monoariloxi-metalocenos. |
EP99960984A EP1133504B1 (de) | 1998-11-25 | 1999-11-18 | Verfahren zur herstellung von monoaryloxy-ansa-metallocenen |
DE59904565T DE59904565D1 (de) | 1998-11-25 | 1999-11-18 | Verfahren zur herstellung von monoaryloxy-ansa-metallocenen |
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DE19854350.6 | 1998-11-25 | ||
DE19854350 | 1998-11-25 | ||
DE19912576.7 | 1999-03-19 | ||
DE1999112576 DE19912576A1 (de) | 1999-03-19 | 1999-03-19 | Verfahren zur Herstellung von Monoaryloxy-Ansa-Metallocenen |
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EP (1) | EP1133504B1 (de) |
JP (1) | JP2002530416A (de) |
BR (1) | BR9915708B1 (de) |
DE (1) | DE59904565D1 (de) |
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WO2003057704A1 (en) * | 2002-01-08 | 2003-07-17 | Basell Polyolefine Gmbh | Preparation of dialkyl-ansa-metallocenes |
WO2004037840A1 (en) * | 2002-10-25 | 2004-05-06 | Basell Polyolefine Gmbh | Racemoselective synthesis of rac-diorganosilylbis(2-methylbenzo[e]indeyl) zirconium componds |
US6894179B2 (en) * | 2000-06-30 | 2005-05-17 | Exxon Mobil Chemical Patents Inc. | Metallocene compositions |
US6903229B2 (en) * | 2000-06-30 | 2005-06-07 | Exxonmobil Chemical Patents Inc. | Metallocene compositions |
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US7053160B1 (en) * | 1998-11-25 | 2006-05-30 | Basell Polyolefine Gmbh | Metallocene monohalogenides |
EP1133503A1 (de) | 1998-11-25 | 2001-09-19 | Basell Polyolefine GmbH | Verfahren zur aufreinigung von metallocenen |
ATE354540T1 (de) | 2000-01-21 | 2007-03-15 | United States Borax Inc | Nonaboratzusammensetzung und ihre herstellung |
US6380122B1 (en) * | 2000-06-30 | 2002-04-30 | Exxonmobil Chemical Patents Inc. | Metallocene compositions |
US6376412B1 (en) * | 2000-06-30 | 2002-04-23 | Exxonmobil Chemical Patents Inc. | Metallocene compositions |
US7122498B2 (en) * | 2000-06-30 | 2006-10-17 | Exxonmobil Chemical Patents Inc. | Metallocenes and catalyst compositions derived therefrom |
DE10250025A1 (de) * | 2002-10-25 | 2004-05-06 | Basell Polyolefine Gmbh | Verfahren zur Darstellung teilweise hydrierter rac-ansa-Metallocen-Komplexe |
EP1572761A1 (de) * | 2002-12-16 | 2005-09-14 | Basell Polyolefine GmbH | Herstellung unterstützter katalysatorsysteme, die einen reduzierten anteil von aluminoxanen enthält |
US7507688B2 (en) * | 2002-12-20 | 2009-03-24 | Basell Polyolefine Gmbh | Monocyclopentadienyl complexes |
DE10360060A1 (de) * | 2003-12-19 | 2005-07-21 | Basell Polyolefine Gmbh | Verfahren zur meso-selektiven Synthese von anso-Metallocen |
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Cited By (5)
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US6894179B2 (en) * | 2000-06-30 | 2005-05-17 | Exxon Mobil Chemical Patents Inc. | Metallocene compositions |
US6903229B2 (en) * | 2000-06-30 | 2005-06-07 | Exxonmobil Chemical Patents Inc. | Metallocene compositions |
WO2003057704A1 (en) * | 2002-01-08 | 2003-07-17 | Basell Polyolefine Gmbh | Preparation of dialkyl-ansa-metallocenes |
WO2004037840A1 (en) * | 2002-10-25 | 2004-05-06 | Basell Polyolefine Gmbh | Racemoselective synthesis of rac-diorganosilylbis(2-methylbenzo[e]indeyl) zirconium componds |
US7098354B2 (en) | 2002-10-25 | 2006-08-29 | Basell Polyolefine Gmbh | Racemoselective synthesis of rac-diorganosilylbis(2-methylbenzo[e]indeyl)zirconium compounds |
Also Published As
Publication number | Publication date |
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US6620953B1 (en) | 2003-09-16 |
JP2002530416A (ja) | 2002-09-17 |
EP1133504B1 (de) | 2003-03-12 |
ES2192408T3 (es) | 2003-10-01 |
EP1133504A1 (de) | 2001-09-19 |
DE59904565D1 (de) | 2003-04-17 |
BR9915708B1 (pt) | 2010-07-13 |
BR9915708A (pt) | 2001-08-14 |
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