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  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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  • C07F17/00—Metallocenes
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  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/02—Silicon compounds
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  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/02—Silicon compounds
  • C07F7/08—Compounds having one or more C—Si linkages
  • C07F7/12—Organo silicon halides
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  • C08F2420/00—Metallocene catalysts
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  • C08F2420/00—Metallocene catalysts
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  • 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
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  • 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
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  • 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
• • 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 transition metal complexes of the general formulas (la) or (lb),
• R 1 to R 3 are hydrogen, -CC-alkyl, 5- to 7-membered cycloalkyl, which in turn can be substituted by -CC-alkyl, C 6 -C 5 -aryl or arylalkyl, the radicals being adjacent Residues can each form a saturated or unsaturated ring having 5 to 15 carbon atoms with the atoms connecting them, or Si (R 4 ) 3 with
• R4-C ⁇ o-alkyl C 3 -C ⁇ 0 -cycloalkyl or C 6 -C ⁇ 5 -aryl
• M titanium, zirconium, hafnium, vanadium, niobium or tantalum or an element of III.
• n 1, 2 or 3 where n corresponds to the valency of M minus the number 2,
• R 5 and R 6 are Ci-Cio-alkyl, C 6 -C 15 aryl, alkylaryl, arylalkyl, fluoroalkyl or fluoroaryl each having 1 to 10 C atoms in the alkyl radical and 6 to 20 C atoms in the aryl radical and
• radicals X are the same or different
• Y - 0, S -, NR 7 or PR 7 means where
• R 7 Ci-Cio-alkyl, C 6 -C 5 aryl, C 3 -C 0 cycloalkyl or
• n 'and m' each 1, 2, 3 or 4 and
• R 8 is hydrogen, Ci-Cio-alkyl, C 6 -C 5 aryl, which in turn can be substituted with C 4 -C 4 alkyl groups, or C 3 -C ⁇ o-cycloalkyl,
• Z is a triple linking bridge group
• a and A 1 stand for double-linking bridge links.
• the invention also relates to processes for the preparation of the transition metal complexes, the compounds used as intermediates for their preparation, the use of the transition metal complexes, tall complexes for the polymerization of olefins, processes for the polymerization of olefins, homo- or copolymers of ethylene or propylene with other C 2 -C 2 -alk-1-enes, their use for the production of films, fibers or moldings and the films , Fibers or molded articles made from these polymers.
• Metallocene catalysts have recently been increasingly used for the polymerization or copolymerization of ethylene or propylene.
• ethylene polymerization it is often desirable to have a high content of comonomers such as but-l-ene, hex-l-ene or oct-l-ene in the ethylene copolymers.
• propylene polymerization an isotactic structure of the polymer chains is generally sought. With metallocene catalysts, these properties can be controlled via the ligand structure.
• the opening angle between the cyclopentadienyl rings of the metallocene has a great influence on the installation behavior.
• a large opening angle can be achieved, for example, by bridging the rings using a SiMe 2 or CH bridge.
• Such metallocene catalysts are described, for example, in EP-A 336 128. By bridging, these complexes can exist in both racemic and meso forms.
• the racemic metallocenes are particularly suitable for use in propylene polymerization, since stereo-selective catalysts are necessary here.
• a disadvantage of the ⁇ ser metallocenes is that in the synthesis, as a rule a mixture of racemic and meso form is obtained from which the meso form must be laboriously separated.
• a cyclopentadienyl ring is replaced by a hetero ligand, for example an amide group.
• the amide group in these metallocenes is covalently linked to the ring system via a bridge (e.g. SiMe).
• a bridge e.g. SiMe.
• metallocene complexes of this type incorporate comonomers particularly well in the ethylene-olefin copolymerization and provide a high molar mass.
• isotactic polypropylene with complexes of this type since the metal center had no C2 symmetry.
• the polypropylene obtained was atactic with partially syndiotactic proportions (WO 94/00500, US-A 5 096 867, EP-A 520 732, US-A 5 504 169).
• the object of the invention was therefore to remedy the disadvantages described above and to develop a metallocene complex which has process engineering advantages in ethylene polymerization and in particular a high degree of comonomer incorporation and provides a high molar mass. Furthermore, the metallocene should be able to catalyze the production of isotactic polypropylene and also to deliver a high molar mass there. Finally, the structure of the metallocene should be such that it is procedural ⁇ renstechnisch easy to manufacture and can arise in particular in the synthesis no meso form, the gene for many applica- would have to be laboriously separated otherwise.
• transition metal complexes defined at the outset were found.
• methods for their preparation, to ih ⁇ rer preparation as intermediates compounds used the use of transition metal complexes for the polymerization of olefins, process for the polymerization of olefins, homopolymers or copolymers of ethylene or of propylene with other C 2 -C ⁇ were - Alk- 1-enes, their use for the production of films, fibers or moldings and the films, fibers or moldings found from these polymers.
• the substituents R 1 to R 3 are preferably a hydrogen atom, a Ci-C ⁇ -alkyl such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl or tert Various butyl and the - NEN isomers of pentyl or hexyl, or an aryl such as phenyl or naphthyl, unsubstituted or substituted with alkyl groups which rade from the ge ⁇ said group may be substituted.
• a Ci-C ⁇ -alkyl such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl or tert
• a Ci-C ⁇ -alkyl such as methyl, ethyl, n-propyl, iso-propyl, n
• transition metals M in the general formulas (la) and (lb) the elements of subgroup 4 of the periodic table, ie titanium, zirconium and hafnium, are preferred. Titanium and zirconium are particularly preferred.
• the halogens fluorine, chlorine, bromine and iodine are to be mentioned as ligands X, chlorine being particularly preferred.
• the C 1 -C 10 -alkyl radicals methyl, ethyl, propyl and butyl are particularly suitable.
• the preferred C 5 -C 5 aryl radical is the phenyl radical.
• hetero ligands Y, 0, - S - and NR 7 are preferred, methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, cyclohexyl, phenyl, in particular as substituents on the nitrogen atom, Benzyl and Si (R 8 ) 3 are mentioned.
• Preferred substituents on the nitrogen atom are also radicals R 7 , which are mono- or polysubstituted by groups acting as Lewis bases, such as Si (R 8 ) 3 , SR 8 ,
• R 8 nen of these groups are substituted, where n 'and m' each represent the numbers 1, 2, 3 or 4.
• Particularly preferred groups are OR 8 and N (R 8 ) 2 .
• Particularly preferred substituted radicals R 7 are substituted C 1 -C 6 -alkyl groups, in particular substituted methyl groups, ethyl groups, n-propyl groups, isopropyl groups, n-butyl groups, tert. -Butyl groups and cyclohexyl groups.
• the bridging group Z is usually a dreifachverknüpfende organic or organometallic atomic group which is di rectly ⁇ also bound as about Bruck members A and A 1 to the cyclopentadienyl dienylringsystem as well as on the hetero ligand Y both.
• Suitable bridge groups Z are, for example
• R 9 to R 12 each represent a hydrogen atom, a halogen atom, a C ⁇ -C ⁇ o-alkyl group, a C ⁇ -C ⁇ o-fluoroalkyl group, a Cg-Cio-fluoroaryl group, a Cg-Cio-aryl group, a Ci-Cio-alkoxy group, a C 2 -C ⁇ o-alkenyl group, a C 7 -C 0 arylalkyl group, a Cs-C o-arylalkenyl group or a C -C 40 "alkylaryl group or two radicals R 9 to R 12 with the atoms connecting them a 4 to 15 Form C-atoms having saturated or unsaturated ring, and
• M 1 is silicon, germanium or tin
• the radicals R ⁇ are particularly suitable as the bridge group Z.
• R 9 R 10 R 9 R 9 to R 11 represent methyl, ethyl, tert-butyl or phenyl.
• the bridging group Z is particularly preferably Si (Me), Si (Ph), Si (t-Bu) or C (CH 3 ) 2 C (CH 3 ).
• the double linking bridges A and A 1 effect a second bond of the bridging group Z to the cyclopentadienyl ring system. This differentiates the "right” and “left” side of the metallocene complex and the generation of an ⁇ ereoselective polymerization center is possible.
• the bridge link A can in turn consist of a plurality of double link links A 2 , where A is preferably - (A 2 ) m - with m from 1 to 6.
• the bridge link A particularly preferably comprises 1 to 3 links A 2 and in particular 2 links A 2 .
• the members A 1 or A 2 are organic usually metallor ⁇ or ganic atomic groups-substituted bridging atom is preferably either a substi ⁇ or a substituted or the unsubstituted aromatic ring th exist.
• a 1 and A 2 are for example
• R 13 to R 16 are the same or different and each represents a hydrogen atom, a halogen atom, a
• C ⁇ -C ⁇ o-alkyl group a C ⁇ -C ⁇ 0 fluoroalkyl group, a C ö -C o-fluoroaryl group, a C ⁇ -Cio-aryl group, a Ci-Cio-alkoxy group, a C 2 -Cio-alkenyl group, a C - C 4 o-arylalkyl group, a Cs -C 4 o-arylalkenyl group or one
• the links A 1 or A 2 preferably contain carbon, silicon, nitrogen or oxygen as bridge atoms. Hydrogen, methyl, ethyl and phenyl are preferred as substituents on the bridge atoms. Also preferred are phenyl rings, as before ⁇ ferred substituents methyl, ethyl or phenyl groups may bear.
• Transition metal complexes of the general formulas (Ia) or (Ib) in which the group A 1 forms a saturated or unsaturated ring with an adjacent radical R 2 or R 3 are particularly preferred. Transition metal complexes of the general formula (Ia ') are very particularly preferred,
• R 17 to R 19 each represent a hydrogen atom, a C 1 -C 8 -alkyl group, a 5- to 7-membered cycloalkyl group, which in turn can be substituted by C 1 -C 10 -alkyl, a C 6 -C 5 -syl group or an aryl group.
• the substituents R 17 to R 19 are preferably a hydrogen - atom, a Ci-C ß alkyl such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl or tert Butyl and the various isomers of pentyl or hexyl, or an aryl radical such as phenyl or naphthyl, which can be unsubstituted or substituted with alkyl radicals from the group just mentioned. Also preferred are adjacent substituents R 17 to R 19 which each form a saturated or unsaturated ring having 5 to 10 carbon atoms with the atoms connecting them.
• transition metal complexes according to the invention can exist as such. However, it is also possible that, in addition to the ligands X, Y and the cyclopentadienyl ring system, from 1 to 3 neutral Lewis bases such as tetrahydrofuran, diethyl ether, trimethylamine or N, N-dimethylaniline are also coordinated to the transition metal atom. It is also possible for the transition metal complexes to be present as dimers.
• R 1 to R 3 and A 1 have the meaning given above and
• X 2 represents hydrogen or a radical of the formula M 2 R 20 ( O -i) in which
• M 2 is an element of the 1st 4th main group of the periodic system
• R 20 is a halogen, a C ⁇ -C ⁇ o-alkyl group, a 5- to 7-membered cycloalkyl group, which in turn can be substituted by Ci-Cio-alkyl, a C ß- Cis-aryl group or an arylalkyl group, the radicals R 20 being the same or can be different, and
• X 3 and X 4 each represent a halogen
• ⁇ 2 C ⁇ _.
• R 21 R 21 and R 22 are each hydrogen, Ci-Cio-alkyl, C 3 -Cio-cycloalkyl or C 6 -Ci 5 -aryl,
• X6 represents hydrogen or a radical of the formula M 3 R 23 ( P _i) in which
• M 3 is an element of the 1st - 4th main group of the periodic system ⁇
• R 23 is a halogen, a C 1 -C 8 -alkyl group, a 5 - to 7-membered cycloalkyl group, which in turn may be substituted by C 1 -C 8 -alkyl, a C 6 - C s aryl group or an arylalkyl group, the radicals R 23 may be the same or different, and
• p is the valency of M 3 .
• a preferred process for the preparation of the transition metal complexes according to the invention consists in that indene compounds of the general formula (Ha ')
• the starting compounds (Ha), (Ha ') and (Ilb) and (III) are known or can be prepared in a known manner. Part ⁇ as they are commercially available.
• Verbindun ⁇ gene (Ila), (Ha ') or (IIb) is preferably present in the solvent and to release the compound or compounds (III) neat or in solution. This can be at temperatures from -100 to + 100 ° C, be ⁇ vorzugt from -80 to + 30 ° C, take place.
• the products (IVa), (IVa ') or (IVb) can then be obtained, for example, by extraction (in the case of one or more solid further reaction products) or by distillation (in the case of one or more liquid further reaction products).
• the intramolecular ring closure to the compounds (Va), (Va ') or (Vb) can generally be carried out by the known methods of CC, C-heteroatom or heteroatom-heteroatom bond formation, as described, for example, in Jerry March, Advanced Organic Chemistry, John Wiley & Sons, New York 1985 or Organikum, VEB Deutscher Verlag dermaschineen, Berlin 1977.
• radicals A 1 , X 1 , A and X 5 particularly suitable reactions are Friedel-Crafts alkylation, Friedel-Crafts acylation, azo coupling, radical bond formation, Wurz reaction, addition of a hetero atom -Hydrogen- bond to a CC-, C-heteroatom or heteroatom heteroatom- multiple bond (eg hydrosilylation, hydroboration, hydroamination), formation of boat bases, formation of amides, ver esterification (also organometal-catalyzed), etherification, Grignard reaction, McMurry coupling, Diels-Alder reaction, cross-coupling of aromatics, Heck reaction, Suzuki coupling, Reformatsky reaction, Wittig reaction, Ritter reaction and condensation reactions (eg aldol condensation, Knoevenagel condensation, Perkin reaction).
• Friedel-Crafts alkylation Friedel-Crafts acylation
• azo coupling radical bond formation
• Wurz reaction addition of a hetero atom
• the Friedel-Crafts alkylation or Friedel-Crafts t-acylation reactions are particularly preferred.
• the Friedel-Crafts alkylation can also be carried out as a two-stage synthesis, starting from the unsaturated compound and the in situ formation of the corresponding halogenated precursor.
• Y represents 0, S -, NR 7 or PR 7 ,
• R 7 Ci-Cio-alkyl, C 6 -C 5 aryl, C 3 -C 0 cycloalkyl or
• N (R 8) 2, P (R 8) 2 or a combination thereof sub ⁇ stituators Ci-Cio-alkyl, C ⁇ -Cis-aryl, C 3 -C ⁇ 0 -Cy- cloalkyl or C 7 -C ⁇ 8 alkylaryl or Si (R 8 ) 3 is with
• n 'and m' each 1, 2, 3 or 4 and
• R 8 is hydrogen, Ci-Cio-alkyl, Ce-Cis-aryl, which in turn can be substituted with C 1 -C 4 alkyl groups, or C 3 -C 10 cycloalkyl,
• X 6 and X 7 represent hydrogen or a radical of the formula M 3 R 23 ( p _D in which
• M 3 is an element of the 1st - 4th main group of the periodic system
• R 23 is a halogen, a -CC-alkyl group, a
• p is the valency of M 3 .
• a compound with the formula X 7 X 3 is split off by forming the bond between Z and Y.
• Preferred compounds of the formula YX 6 X 7 are monosubstituted amines and alcohols or their organometallic derivatives, particularly preferred are methylamine, ethylamine, tert. -Butylamine and phenylamine. If an acid is released during the reaction (ie X 7 is a hydrogen), a base is usually added to the reaction mixture.
• the reaction is usually carried out in solution, the use of ethereal solvents such as diethyl ether or THF being preferred.
• ethereal solvents such as diethyl ether or THF being preferred.
• the order of addition is not critical per se. It is preferred to submit the compound (Va), (Va ') or (Vb) in the solvent and the compound YX 6 X 7 in bulk, in solution or in the form of a hydrosalt (for example a hydrochloride) which is then replaced by a strong base in the corresponding base is converted to ⁇ to add. This can be done at temperatures from -100 to + 100 ° C, preferably from -80 to + 70 ° C.
• USAGE ⁇ dung of amines it has proved advantageous, explicate the amine in two-fold excess, since it is then simultaneously acts as the base.
• Preferred metals are titanium and zirconium.
• Suitable substituents are preferably halogens, used insbeson ⁇ particular chlorine.
• the tetrahalides can also be used in the form of base adducts (e.g. with THF).
• the reaction is usually carried out in solution, the use of ethereal solvents such as diethyl ether or THF being preferred.
• ethereal solvents such as diethyl ether or THF being preferred.
• the order of addition is schematically se unkri ⁇ . It is preferred that the connection (Via), (Via ') or (VIb) in Submit solvent and add the metal compound in bulk or in solution. This can be done at temperatures from -100 to + 100 ° C, preferably from -80 to + 30 ° C.
• transition metal complexes (la), (la ') and (lb) according to the invention are distinguished by an asymmetrical arrangement of the ligands on the metal atom. Due to this structure, the transition metal complexes (la), (la ') and (lb) cannot exist in a meso form. As a result of the asymmetrical substitution on the cyclopentadienyl ligand, however, the polymerization takes place stereoselectively.
• the present invention further relates to the intermediates of the general formula (Via ') used to prepare the transition metal complexes (Ia') according to the invention.
• R 1, R 2 and R 17 to R 19 are hydrogen, C ⁇ 0 alkyl
• 5- to 7-membered cycloalkyl which in turn can be substituted by Ci-Cio-alkyl, C 6 -C 5 aryl or arylalkyl, two adjacent radicals each having a 5 to 15 carbon atoms having saturated or can form unsaturated ring, or Si (R 4 ) 3 with
• R 4 Ci-Cio-alkyl, C 3 -C 10 cycloalkyl or C 6 -C ⁇ 5 aryl,
• X 6 is hydrogen or a radical of the formula M 3 R 23 ( p _i), in which
• M 3 is an element of the 1st - 4th main group of the periodic system
• R 23 is a halogen, a C 1 -C 0 alkyl group, a
• p is the valency of M 3 .
• Y stands for - 0 -, - S -, NR 7 or PR 7 , where
• R 7 Ci-Cio-alkyl, C 6 -C 5 aryl, C 3 -C ⁇ o cycloalkyl or C -Ci 8 alkylaryl or singly or repeatedly with
• R 8 N (R 8) 2 / P (R 8) 2 or a combination thereof sub ⁇ stitutechnischs Ci-Cio-alkyl, C 6 -C 5 -aryl, C 3 -C ⁇ 0 -Cy- cloalkyl or C -cis - Alkylaryl or Si (R 8 ) 3 is with
• n 'and m' each 1, 2, 3 or 4 and
• R 8 is hydrogen, Ci-Cio-alkyl, C 6 -C 5 aryl, which in turn can be substituted with C 1 -C 4 alkyl groups, or C 3 -C ⁇ 0 cycloalkyl,
• R 9 to R 12 each represent a hydrogen atom, a halogen atom, a C ⁇ -C ⁇ o-alkyl group, a C ⁇ -C o-fluoroalkyl group, a C ⁇ -Cio-fluoroaryl group, one
• C 6 -Cio'Aryl a Ci-Cio-alkoxy group, a C 2 -C ⁇ o-alkenyl group, a C -C 4 o -arylalkyl group, a C 8 -C o -arylalkenyl group or a C -C o -alkylaryl group or where two adjacent radicals each form a saturated or unsaturated ring having 4 to 15 carbon atoms with the atoms connecting them, and
• M 1 is silicon, germanium or tin
• the present invention also relates to for the manufacture ⁇ he indungssieen transition metal complexes la lung 'ein ask- th intermediate products of general formula (IVa')
• R 1 , R 2 and R 17 to R 19 are hydrogen, Ci-Cio-alkyl,
• 5- to 7-membered cycloalkyl which in turn can be substituted by Ci-Cio-alkyl, Ce-cis-aryl or arylalkyl, where two adjacent radicals can each form a saturated or unsaturated ring having 5 to 15 carbon atoms with the atoms connecting them, or Si (R) 3 with
• R 4 Ci-Cio-alkyl, C 3 -C ⁇ 0 -cycloalkyl or C 6 -aryl -C ⁇ 5,
• X 1 is hydrogen or a halogen
• X 3 is a halogen
• X 5 is hydrogen, a halogen or a group
• R 21 and R 22 each are hydrogen, C ⁇ 0 alkyl, C 3 -C ⁇ 0 -cycloalkyl or C 6 -aryl -C ⁇ 5,
• R 9 to R i2 each represent a hydrogen atom, a halogen atom, a C ⁇ -C ⁇ o-alkyl group, a Ci-Cio-fluoroalkyl group, a C 6 -C ⁇ o-fluoroaryl group, one Cg-Cio-aryl group, a Ci-Cio-alkoxy group, a C 2 -C o-alkenyl group, a C -C 4 o -arylalkyl group, a C 8 -C 4 o -arylalkenyl group or a C 7 -C 4 o -alkylaryl group mean or wherein two adjacent radicals each form a saturated or unsaturated ring having 4 to 15 carbon atoms with the atoms connecting them, and
• Ml is silicon, germanium or tin
• the transition metal complexes of the invention are suitable for ⁇ play for the polymerization of olefins and particularly for the polymerization of ⁇ -olefins, ie hydrocarbons having terminal double bonds.
• Suitable monomers can be functionalized olefinically unsaturated compounds such as ester or amide derivatives of acrylic or methacrylic acid, for example acrylates, Be methacrylates or acrylonitrile.
• Nonpolar olefinic compounds are preferred, including aryl-substituted ⁇ -olefins such as styrene.
• Particularly preferred olefins are linear or branched C -C ⁇ 2 -alk-l-ene, in particular linear C 2 -C ⁇ o- alk-1-enes such as ethylene, propylene, but-l-ene, pent-1-ene, hex l-ene, hept-1-ene, oct-l-ene, non-l-ene, dec-l-ene or 4-methyl-pent-l-ene. Mixtures of these monomers can also be polymerized.
• the present invention further relates to a process for the polymerization of olefins, which is characterized in that the polymerization is carried out in the presence of transition metal complexes of the formulas (Ia), (Ia ') or (Ib) and compounds forming metallocenium ions.
• Suitable compounds which form metallocenium ions are, for example, strong, neutral Lewis acids, ionic compounds with Lewis acid cations or ionic compounds with Bronsted acids as cations.
• M 4 is an element of III.
• Main group of the periodic table means, in particular B, Al or Ga, preferably B,
• X 8, X 9 and ⁇ i ° for are hydrogen, C ⁇ 0 alkyl, C 6 -C ⁇ 5 -aryl, alkylaryl, arylalkyl, haloalkyl or haloaryl each having from 1 to 10 carbon atoms in the alkyl radical and 6 to 20 C Atoms in the aryl radical or fluorine, chlorine, bromine or iodine are, in particular halogen aryls, preferably pentafluorophenyl.
• Suitable ionic compounds with Lewis acid cations are compounds of the general formula (VIII) [ ( Y ⁇ a + ) Q ⁇ Q 2 - • .Q 2 l d + (VIII) in which i an element of I. to VI. Main group or the
• C 1 -C 28 alkyl, C 6 -C 5 aryl, alkylaryl, arylalkyl, haloalkyl, haloaryl each having 6 to 20 C atoms in the aryl and 1 to 28 C atoms in the alkyl radical, C 3 -Cio cycloalkyl, may be appropriate, substituted with C ⁇ -C ⁇ 0 alkyl, halogen, C ⁇ -C _ 28 alkoxy, C ⁇ -cis-aryloxy, silyl or mercaptyl ⁇ n - which gegebe
• Carbonium cations, oxonium cations and sulfonium cations as well as cationic transition metal complexes are particularly suitable.
• Ins ⁇ special are the triphenylmethyl cation, the silver cation and the 1, to name one '-Dimethylferrocenylkation. They preferably have noncoordinating counterions, in particular gen Borverbindun ⁇ , as they are also mentioned in WO 91/09882, preferably tetrakis (pentafluorophenyl) borate.
• Ionic compounds with Bronsted acids as cations and preferably also non-coordinating counterions are mentioned in WO 91/09882; the preferred cation is N, N-dimethylanilinium.
• Cations or ionic compounds having Brönsted acids as Kat ⁇ ion is preferably from 0.1 to 10 equivalents, based on the transition metal complex (Ia), (la ') or (lb).
• Open-chain or cyclic alumoxane compounds of the general formulas (IX) or (X) are particularly suitable as compounds which form metallocenium ions.
• R 2 Open-chain or cyclic alumoxane compounds of the general formulas (IX) or (X) are particularly suitable as compounds which form metallocenium ions.
• R 24 is a -C 4 alkyl group, preferably a methyl or ethyl group and m is an integer from 5 to 30, preferably 10 to 25.
• oligomeric alumoxane compounds are usually prepared by reacting a solution of trialkylaluminum with water and are, inter alia, in EP-A 284 708 and US-A 4 794 096.
• the oligomeric alumoxane compounds obtained are mixtures of different lengths, both linear and cyclic chain molecules, so that m is to be regarded as the mean.
• the alumoxane compounds can also be present in a mixture with other metal alkyls, preferably with aluminum alkyls.
• transition metal complexes (la), (la ') or (lb) and the oligomeric alumoxane compounds of the general formulas (IX) or (X) in amounts such that the atomic ratio between aluminum from the oligomeric Alumoxane compounds and the transition metal from the transition metal complexes is in the range from 10: 1 to 10 6 : 1, in particular in the range from 10: 1 to 10 4 : 1.
• both the transition metal complexes (la), (la ') or (lb) and the compounds forming metallocenium ions are used in solution in the process according to the invention, where Aromatic hydrocarbons with 6 to 20 carbon atoms, in particular xylenes and toluene, are particularly preferred.
• M 5 is an alkali metal, an alkaline earth metal or a metal of III.
• Main group of the periodic table ie boron, aluminum, gallium, indium or thallium,
• R 25 is hydrogen, C 1 -C -alkyl, C 6 -C 5 -aryl, alkylaryl or arylalkyl, each having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical,
• R 26 and R 27 is hydrogen, halogen, C ⁇ -C ⁇ 0 alkyl, C 6 -C 15 -aryl, alkylaryl, arylalkyl or alkoxy each having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 C atoms in the aryl radical,
• r is an integer from 1 to 3
• s and t are integers from 0 to 2
• M 5 means lithium, magnesium or aluminum
• R 26 and R 27 represent Ci-Cio alkyl.
• metal compounds of the formula (XI) are n-butyl lithium, n-butyl-n-octyl magnesium, n-butyl-n-heptyl magnesium, tri-n-hexyl aluminum, tri-iso-butyl aluminum , Triethyl aluminum and trimethyl aluminum. If a metal compound of the formula (XI) is used, it is preferably present in the catalyst system in an amount such that the molar ratio of M 5 from formula (XI) to transition metal M from formula (la), (la ') or (lb) from 800: 1 to 1: 1, in particular 500: 1 to 50: 1.
• transition metal complexes (la), (la ') or (lb) can also be used on a carrier material in the polymerization process according to the invention.
• the carrier materials used are preferably fine-particle carriers which generally have a particle diameter in the range from 1 to 300 ⁇ m, in particular from 20 to 90 ⁇ m.
• Suitable carrier materials are, for example, inorganic oxides of silicon, aluminum, titanium or one of the metals of main group I or II of the periodic table or mixtures of these oxides, of which, in addition to aluminum oxide or magnesium oxide or a layered silicate, in particular silica gel is preferred.
• the carrier can be subjected to a thermal treatment, for example to remove adsorbed water, such treatment generally being carried out at temperatures in the range from 80 to 200 ° C., preferably from 100 to 150 ° C., or it can be calcined.
• the carrier can also be treated chemically, usually using customary drying agents such as metal alkyls, preferably aluminum alkyls, chlorosilanes or SiCl 4 .
• Suitable carriers are also fine-particle polyolefins, for example fine-particle polypropylene.
• the process according to the invention can be carried out either batchwise or preferably continuously in the customary reactors used for the polymerization of olefins.
• Suitable reactors include continuously operated ones
• Stirred kettles, stirred powder bed reactors, loop or fluidized bed layer reactors it also being possible to use a series of several reactors of the same or different types connected in series.
• the polymerization reactions can be carried out in the gas phase, in suspension, in liquid and in supercritical monomers or in inert solvents.
• the polymerization conditions are not critical per se. Pressures from 1 to 3500 bar, preferably from 2 to 100 bar and in particular from 10 to 40 bar and temperatures from 0 to 400 ° C, preferably from 20 to 250 ° C and in particular from 50 to 100 ° C have proven to be suitable.
• the average molar mass of the polymers can be controlled using the methods customary in polymerization technology, for example by adding regulators such as hydrogen.
• transition metal complexes it is particularly preferred to prepare homopolymers or copolymers of ethylene or of propylene with other C 2 -C 2 -alk-1-enes.
• the homo- or copolymers of propylene with other C 2 -C 2 -alk-1-enes obtainable with the transition metal complexes (la), (la ') or (lb) are particularly preferably homopolymers of propylene or copolymers of propylene with ethylene and / or But-l-en.
• the copolymers of propylene can have a statistical structure. However, they can also be in the form of the so-called block or impact copolymers.
• the homo- or Copo ⁇ lymerisate of propylene are characterized by a high molecular weight and in particular by an isotactic structure of the polymer chains.
• the homo- or copolymers of ethylene with other C 2 -C 2 -alk-1-enes obtainable with the transition metal complexes (la), (la ') or (lb) are particularly preferably homopolymers of ethylene or copolymers of ethylene with propylene, but -l-enes, hex-l-enes and / or oct-l-enes.
• the homo- or copolymers of ethylene are characterized by a very high molar mass. Since a high degree of comonomer incorporation can be observed in their production, copolymers with a high comonomer content are accessible or it is possible to use a monomer mixture which has a rela-. tiv having low comonomer content and process thus in ⁇ Polymeri zation advantages to reach the desired copolymers.
• the homo- or copolymers of ethylene or propylene with other C 2 -C 2 -alk-1-enes obtainable with the transition metal complexes according to the invention have good performance properties and are suitable for the production of fibers, films or moldings.
• Methylamine passed that generates from methyl ammonium hydrochloride and potassium hydroxide and ge means of KOH pellets and calcium oxide ⁇ was dried. The mixture was stirred for a further 2 h and then removed the Lö ⁇ solvents in vacuo. The residue was taken up in 200 ml of petroleum ether 30. The undissolved constituents were removed by centrifugation, the supernatant solution was concentrated and the product was crystallized at -78.degree. The yield was 1.1 g (49%).
• the polymerization was terminated for 90 minutes by relaxing the autoclave. 1 g of polymer was obtained as a white powder.
• the melting temperature (determined by DSC) was 148 ° C
• the mmin pentad fraction (determined by ⁇ 3 C-NMR spectroscopy) was 61% and the viscosity ( ⁇ value, determined according to ISO 1628-3 at 135 ° C in decalin) was 3.01 dl / g.
• the insoluble solid was taken up in toluene and warmed to about 50 ° C. A yellow toluene phase was obtained, which was centrifuged off from a white solid. From the toluene phase a highly viscous orange oil was also kept after removal of the solvent. Receiving in hexane and heating to 50 ° C lie ⁇ ferte again a yellow hexane phase and an insoluble white powder. After centrifugation and concentration, the hexane phase gave an orange oil.

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• 1998
  • 1998-06-15 DE DE19826403A patent/DE19826403A1/de not_active Withdrawn
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