POLYBUTADIENE, PRODUCTION AND USE THEREOF

The invention relates to polybutadiene, which contains the monomer units derived from 1,3-butadiene having a vinyl double bond in a proportion of 25 to 75 mole percent, having a trans-double bond in a proportion of 0 to 10 mole percent and a cis-double bond in a proportion of 25 to 75 mole percent, wherein the totality of the monomer units (A), (B) and (C) is supplemented to 100 mole percent, and which is characterized in that it has a number-average mole mass of 1,000 to 3,000 g/mole. The invention further relates to a method for producing polybutadienes, the use of the polybutadiene according to the invention and compositions containing polybutadiene according to the invention. 121-. (canceled)22. A method for preparing a polybutadiene bypolymerizing 1,3-butadiene in the presence of a solvent and a catalyst system comprising a) a cobalt compound, b) an organoaluminium compound, c) an organophosphorus compound and d) water, wherein a mixture of catalyst system and solvent is initially charged and the 1,3-butadiene is metered into this mixture.24. The method according to claim 22 , wherein the polymerization is carried out at a temperature of the reaction mixture of from 20 to 60° C. and polymerization is carried out at a pressure of from 2 to 7 bar.25. The method according to claim 22 , wherein the cobalt compound used is cobalt 2-ethylhexanoate.26. The method according to claim 22 , wherein the organophosphorus compound used is tris(2 claim 22 ,4-di-tert-butylphenyl) phosphite or tris(ortho-phenylphenyl) phosphite.27. The method according to claim 22 , wherein the organoaluminium compound used is ethylaluminium sesquichloride or diethylaluminium chloride.28. The method according to claim 22 , wherein the molar ratio of cobalt compound to total amount of 1 claim 22 ,3-butadiene used is from 1:2500 to 1:15 000.29. The method according to claim 23 , wherein the cobalt compound used is cobalt 2-ethylhexanoate.30. The method according to claim 23 , wherein the ...

Polymerization of ethylene in solution processes using a ziegler-natta catalyst and a hydrogenation procatalyst

Processes of polymerizing olefin monomers and catalyst systems. The catalyst systems include a non-hydrogen-generating post-metallocene procatalyst; a co-catalyst; and a hydrogenation procatalyst having the formula Cp 2 TiX n TiCp 2 or Cp 2 TiX n , in which each Cp is cyclopentadienyl substituted with at least one (C 1 -C 10 )alkyl; each X is independently monoanionic or neutral, wherein each X is independently (C 1 -C 40 )hydrocarbon, (C 1 -C 40 )heterohydrocarbon, (C 1 -C 40 )hydrocarbyl, (C 1 -C 40 )heterohydrocarbyl, or a halogen atom; and n is 1 or 2.

POLYBUTADIENE, PRODUCTION AND USE THEREOF

The invention relates to polybutadiene, which contains the monomer units derived from 1,3-butadiene having a vinyl double bond in a proportion of 25 to 75 mole percent, having a trans-double bond in a proportion of 0 to 10 mole percent and a cis-double bond in a proportion of 25 to 75 mole percent, wherein the totality of the monomer units (A), (B) and (C) is supplemented to 100 mole percent, and which is characterized in that it has a number-average mole mass of 1,000 to 3,000 g/mole. The invention further relates to a method for producing polybutadienes, the use of the polybutadiene according to the invention and compositions containing polybutadiene according to the invention. 2. The polybutadiene according to claim 1 , wherein the polybutadiene has a viscosity of 2000 to 8000 mPa s.3. The polybutadiene according to claim 1 , wherein said polybutadiene has a dispersity of 2.1 to 3.0.4. The polybutadiene according to .5. The method for preparing polybutadienes by polymerizing 1 claim 1 ,3-butadiene in the presence of a solvent and a catalyst system comprisinga) a cobalt compound,b) an organoaluminium compound,c) an organophosphorus compound andd) water,wherein a mixture of catalyst system and solvent is initially charged and the 1,3-butadiene is metered into this mixture.6. The method according to claim 5 , wherein the polymerization is carried out at a pressure of from 2 to 7 bar.7. The method according to claim 5 , wherein the polymerization is carried out at a temperature of the reaction mixture of from 20 to 60° C.8. The method according to claim 5 , wherein the cobalt compound used is cobalt 2-ethylhexanoate.9. The method according to claim 5 , wherein the organophosphorus compound used is tris(2 claim 5 ,4-di-tert-butylphenyl) phosphite or tris(ortho-phenylphenyl) phosphite.10. The method according to claim 5 , wherein the organoaluminium compound used is ethylaluminium sesquichloride or diethylaluminium chloride.11. The method according to claim 5 , wherein ...

Silicon-bridged transition metal compounds

Silicon-bridged transition metal compounds and their use as α-olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes α-olefins to high isotacity with a minimum of inversions at high rates of catalyst activity. The catalyst is easily made in high yields and readily separated from atactic meso forms.

Silicon-bridged transition metal compounds

Silicon-bridged transition metal compounds and their use as α-olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes α-olefins to high isotacity with a minimum of inversions at high rates of catalyst activity. The catalyst is easily made in high yields and readily separated from atactic meso forms.

CATALYST FOR $g(a)-OLEFIN POLYMERIZATION AND PRODUCTION OF POLY-$g(a)-OLEFIN THEREWITH

A process for polymerizing α-olefin by using a catalytic system prepared by bringing a reaction product of a halogenated metallocene compound with an organometallic compound into contact with a compound which forms a stable anion when reacted with the reaction product. A polyolefin can be obtained at a high catalytic activity by using an inexpensive catalyst by this process.

Process and a catalyst for preventing reactor fouling

A support containing methylalumoxane and derivatives thereof is described which is formed by an incipient impregnation technique. The most preferred support is silica. Incipient impregnation in accordance with the invention provides a supported alumoxane, methylalumoxane, which substantially eliminates the problem of fluid bed reactor fouling when methylalumoxane is introduced into the reactor during its operation. In accordance with the invention, the process comprises providing methylalumoxane activated metallocene compound in particulate form as catalysts in fluid bed gas phase.

Metallocenes and processes therefor and therewith

A composition is provided comprising a metallocene having the formula of: ##STR1## wherein each Z can be the same or different hydrocarbyl radical selected from the group consisting of cyclopentadienyl, indenyl, tetrahydroindenyl, fluorenyl, and mixtures thereof; each X can be the same or different and is selected from the group consisting of hydrogen, fluorine, chlorine, bromine, iodine, R, OR, NR 2 , PR 2 , or OQ, or mixtures thereof wherein the R is a C 1 -C 20 hydrocarbyl radical and Q is an inorganic moiety selected from the group consisting of silica, alumina, clay, phosphated alumina, and mixtures thereof; each Y can be the same or different and is an alkyl group, hydrogen, fluorine, chlorine, bromine, iodine, or mixtures thereof; E is selected from C, Sn, Si, Ge, B, Al, N, or P; M is a metal selected from Ti, Zr, Hf, Sc, Y, V, or La; m is a number sufficient to fill out the valences of metal M; and n is 1 or 2. Also provided is a process for preparing the metallocene by contacting a hydrocarbon having an acidic, replaceable hydrogen with an organolithium and an organohalosilane to prepare a ligand which is then contacted with an organo alkali metal compound to form a bridged ligand followed by contacting the bridged ligand with an organolithium and a metal halide. The composition is useful for olefin polymerization, hydrogenation, alkene epoxidation, alkene isomerization, and ketone reduction.

Polymer bound metallocenes

A polymer bound ligand represented by the formula QM(R) m and process for preparing same are provided, wherein Q is a polystyrene, M is Si, C, Ge, Sn, P, or N, each R is a that at least one R is a cyclopentadienyl-type compound, and m is 2 or 3, said process comprising reacting a metallated polystyrene and an organohalide compound, wherein the polystyrene is metallated with an alkali metal, and wherein said organohalide compound is represented by the formula XM(R) m wherein X is a halide. Other aspects of the present invention include a polymer bound metallocene represented by the formula QM(R) m ZY n and a process for preparing same, wherein Z is a transition metal, Y is a halide, methyl, hydrogen, or a cyclopentadienyl-type group, and n is 2 or 3. Other aspects of the present invention include a catalyst system comprising the polymer bound metallocene and an organoaluminoxane, a method for preparing same, and a polymerization process employing the catalyst system.

Polymerization catalyst systems, their production and use

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process, by using a surface modifier.

Process for upgrading metallocene catalysts

Inorganic and organic impurities are removed from a metallocene catalyst compound comprising the steps of (a) separating inorganic impurities from said compound by forming a solution of said compound in an organic solvent medium which is substantially a non-solvent for said inorganic impurities, (b) treating the solution of said compound with a particulate absorbing material so as to absorb and remove organic impurities from said solution, and (c) separating the solid material, including said particulate absorbing material, from said solution. Optionally, water can be removed by adding a drying agent.

Supported ionic catalyst composition

The invention is directed to a catalyst composition suitable for addition reactions of ethylenically and acetylenically unsaturated monomers comprising a metal oxide support having covalently bound to the surface thereof directly through the oxygen atom of the metal oxide an activator anion that is also ionically bound to a catalytically active transition metal cation compound. The invention includes a preparation process for the invention catalyst composition exemplified by reacting a Lewis acid, such as trisperflourophenyl boron with residual silanol groups of a silica support, preferably then reacting with a Lewis base such as diethylaniline, so as to prepare a silica bound anionic activator that when combined with a suitable transition metal compound will protonate it so as to form the ionic catalyst system. Use of the invention catalyst to polymerize alpha-olefins is exemplified.

Olefin polymerization catalyst system, producing and using it

The invention relates to a novel olefin polymerization catalyst system comprising a reaction product of a transition metal compound. A stable and active single active site catalyst is obtained by producing said reaction product by: (I) contacting in an organic solvent the following reactive components (a) a transition metal compound, which is at least partially soluble in the organic solvent and contains in its molecule at least one organic group and a transition metal chosen from periods 4-7 and groups 3-10 of the Periodic Table (IUPAC 1990), and (b) 0.05-500 moles of an unsaturated organic compound per mole of transition metal of the transition metal compound, which unsaturated organic compound is at least partially soluble in the organic solvent, has in its molecule 2-30 carbon atoms and at least one terminal double bond, to obtain a reaction product dissolved in the organic solvent; and (II) recovering the reaction product of the transition metal compound.

Metallocenes, process for their preparation and their use as catalysts

The present invention relates to a polynuclear metallocene compound of the formula I <IMAGE> (I) a process for their preparation and their use as a catalyst for olefin polymerization.

Process for the preparation of polymers of C2 to C12-alkenes using a retarding agent

A process for the production of polymers of 2-12C alkenes at -50 to 300 degrees C and 0.5-3000 bar in presence of a catalyst system, with the addition of a compound of formula H-M<1)<R<2>)R<1> (I); where M<1> = B, Al, Ga, In or Tl; R<1>, R<2> = H, 1-10C alkyl, 6-15C aryl, or alkaryl or aralkyl with a 1-10C alkyl and a 6-20C aryl group, or 5- to 7-membered cycloalkyl (optionally substituted with 1-10C alkyl); or R<1> + R<2> may form a 4-15C cyclic group. Preferably R<1> and R<2> together form part of a 4-15C bicyclic group; M<1> = boron. The catalyst system contains (A) a metallocene complex and (B) a metallocenium ion-forming compound. A metal compound of formula M<4)<R<24>)r(R<25>)s(R<26>)t (IV) may also be added; M<4> = alkali or alkaline earth metal, or a Sub-Group III metal, i.e. B, Al, Ga, In or Tl; R<24> = 1-10C alkyl, 6-15C aryl, or alkaryl or aralkyl with 1-10C alkyl and 6-20C aryl groups; R<25>, R<26> = as for R<24>, or also halogen or 1-10C alkoxy; r = 1-3; s, t = 0-2; r + s + t = the valency of M<4>.

Metallocenes, and their use as catalysts

The present invention relates to a stereorigid metallocene compound containing, as ligands, at least two substituted or unsubstituted cyclopentadienyl groups which are bonded to one another via a monocyclic or polycyclic ring system, where at least one cyclopentadienyl group is fused to the monocyclic or polycyclic ring system, and to a process for the preparation of a cycloolefin copolymer. The cycloolefin copolymers obtained in this way have high tear strengths and are suitable for the production of extrusion parts and injection moldings.

Ethylenic polymerization catalyst

An ethylenic polymerization catalyst comprising (A) a chromium compound, (B) a carrier, (C) aluminoxane, and (D) a transition metal compound comprising a group having conjugated π electron as a ligand, wherein said chromium compound (A) is not calcined; and a process for producing an ethylenic polymer comprising a step of polymerizing a monomer comprising ethylene in the presence of the ethylenic polymerization catalyst.

Hydrocarbylsilloxy - aluminoxane compositions

Siloxy-aluminoxane compositions which are the reaction products of hydrocarbylsiloxanes substantially-free of Si--OH groups, and aluminoxanes and which have improved solubility and stability in solution even at up to 60 weight percent when compared to the original aluminoxane. The compositions in combination with metallocenes of transition lanithanide and actinide metals form catalysts which can be used in the polymerization of olefins such as ethylene.

Reduction of fouling in olefin polymerization systems

A method of inhibiting polymer build-up in a polymerization system during polymerization of an olefin monomer into a polyolefin in the presence of an unsupported, liquid form catalyst composition comprising a single site catalyst and an activating cocatalyst is provided, which comprises introducing into the system an antifouling agent in an amount sufficient to inhibit polymer build-up.

聚合催化剂体系、它们的制备及用途

本发明一般涉及一种用于聚合烯烃的被载带的催化剂体系。用于载带本发明的催化剂的方法提供了一种被载带的体积大的配位体过渡金属催化剂，当用于聚合过程中时，该催化剂大大地减少了反应器在气相、淤浆或液相聚合过程中的淤塞和结片。

Control of static charge in the course of polymerization process during which metallocene catalyst is used

The invention provides a process for producing a polyethylene homopolymer, copolymer, or terpolymer comprising introducing ethylene and optionally at least one alpha olefin having 3 to 18 carbon atoms in a reaction zone containing a metallocene polymerization catalyst under polymerization conditions in the presence of an amine-containing antistatic agent.

Process and a catalyst for preventing reactor fouling

A support containing methylalumoxane and derivatives thereof is described which is formed by an incipient impregnation technique. The most preferred support is silica. Incipient impregnation in accordance with the invention provides a supported alumoxane, methylalumoxane, which substantially eliminates the problem of fluid bed reactor fouling when methylalumoxane is introduced into the reactor during its operation. The process comprises providing methylaluminoxane in particulate form for use as a catalytic component in the fluidized bed gas phase polymerization process. In accordance with the invention, the process comprises providing methylalumoxane activated metallocene compound in particulate form as catalysts in fluid bed gas phase.

Catalyst component for the polymerization of olefins

According to the present invention there are provided a catalyst component, a catalyst using the catalyst component and a process using the catalyst, for the preparation of olefin polymers high in molecular weight and relatively wide in molecular weight distribution, using an extremely small amount of a modified organoaluminum compound such as methylaluminoxane and in high yield. The catalyst component is prepared by contacting at least the following constituents (1), (2), (3) and (4) with one another: (1) a compound represented by the general formula Me 1 R 1 p (OR 2 ) q X 4-p-q where R 1 and R 2 are each independently a hydrocarbon group having 1 to 24 carbon atoms, X is a halogen atom, Me is Zr, Ti or Hf, p and q are each an integer in the ranges of 0≦p≦4 and 0≦q≦4, provided 0≦p+q≦4; (2) at least one compound selected from the group consisting of compounds represented by the following general formulas 1 to 4: General formula 1: Me 2 R 3 m (OR 4 ) n X 2 z-m-n General formul 2: Me 3 H 2 R 5 3-a General formula 3: Me 4 Me 3 H b R 6 c (OR 7 ) 4-b-c ! y General formula 4: ##STR1## where R 3 ,R 4 , R 5 , R 6 , R 7 and R 8 , which may be the same or different, are each independently a hydrocarbon group having 1 to 24 carbon atoms, Me 2 is a Group 1, 2, 12 or 13 element in the Periodic Table of Elements, Me 3 is a Group 13 element in the same Table, Me 4 is a Group 1, 2, or 12 element in the same Table, X 2 is a halogen atom, z is the valence of Me 2 , y is the valence of Me 4 , and m, n, a, b, c and d are each an integer in the ranges of 0≦m≦z, 0≦n≦z, provided 0≦m+m≦z, 0<a≦3, 1≦b≦4, 1≦c≦3, provided 1≦b+c≦4; and 0≦d≦4; (3) an organocyclic compound having two or more conjugated double bonds; and (4) a compound containing a carbon-halogen bond.

OLEFIN POLYMERIZATION PROCESS

Process for producing polyolefins

A process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with a metallocene catalyst and dinitrogen monoxide in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the production of polyolefins by introducing dinitrogen monoxide into the polymerization medium.

Temperature control of MW in olefin polymerization using supported metallocene catalyst

In gas phase polymerizations and copolymerizations of ethylene, temperature controls the molecular weight, expressed as MI (wherein MI is measured according to ASTM D-1238 Condition E), of the resin product. Increase in polymerization temperature produces decrease in MI; whereas, decrease in polymerization temperature produces increase in MI.

Process and a catalyst for preventing reactor fouling

A support containing methylalumoxane and derivatives thereof is described which is formed by an incipient impregnation technique. The most preferred support is silica. Incipient impregnation in accordance with the invention provides a supported alumoxane, methylalumoxane, which substantially eliminates the problem of fluidized bed reactor fouling when methylalumoxane is introduced into the reactor during its operation. In accordance with the invention, the process comprises providing methylalumoxane activated metallocene compound in particulate form as catalysts in fluidized bed gas phase operation.

Processo para preparar um sistema catalisador contendo metaloceno e processo para polimerizar uma olefina

烯烃聚合催化体的固体组分及其制备和该催化剂及其应用

本发明关于烯烃聚合催化体系的固体组分，它含 有至少一种由过渡金属衍生的中性卤化金属茂和至 少一种离子化剂，其中的过渡金属连接在至少一卤原 子上。制备该固体组分的方法，其中，在非均相介质 中使基于中性卤化金属茂的化合物与基于离子化剂 的化合物相混合。催化体系包括由选自周期表IA、 IIA、IIIB、IIIA和IVA族的金属衍生的有机金属化合 物和上述固体组分。使用该催化体系的烯烃聚合方 法。

Catalyst systems for polymerization, production and use

الملخص : هذا الاختراع يرمي بوجه عام إلى نظام حفاز محمول supported catalyst system يصلح لبلمرة الأولفينات olefin polymerization وتكفل طريقة حمل نظام الحفاز موضوع هذا الاختراع حفازا من متالوسين metallocene محمولا ومنشطا من ألوموكسان alumoxane يخفضان جوهريا من توسيخ fouling وتصفيح sheeting المفاعل reactor عند استخدامهما في عملية البلمرة. Abstract: This invention generally aims at a supported catalyst system suitable for polymerization of olefin polymerization. The method of carrying the catalyst system ensures that the metallocene is a portable and activated alumoxane catalyst that substantially reduces fouling and sheeting of the reactor when used in the polymerization process. .

Supported metallocene catalyst, process for preparing the same, and process for producing olefin polymers

Preactivated catalyst for olefin (co)polymer, catalyst for olefin (co)polymerization, olefin (co)polymer composition, and process for producing the same

Mixed catalyst composition for the production of olefin polymers

A mixed catalyst composition comprising a) a solid Ziegler-Natta catalyst; b) a liquid single site catalyst; and c) at least one activating cocatalyst is provided. Polymers having a broad or bimodal molecular weight distribution may be made with this catalyst composition.

Olefin polymerization catalyst and process for olefin polymerization.

A process for polymerizing olefins

A process for polymerizing olefins by bringing olefins into contact with a transition metal catalyst and a cocatalyst, characterized in that the cocatalyst is a compound in accordance with formulawhereinX is Si, Ge, Sn or Pb, andR is hydrogen or an alkyl, aryl, arylalkyl or alkylaryl group and wherein at least one R group is not hydrogen and contains one or more halogen atomsor the cocatalyst is a compound in accordance with formulawherein X is Si, Ge, Sn or Pb,R is hydrogen or an alkyl, aryl, arylalkyl or alkylaryl group and wherein at least one R group is hydrogen and contains one or more halogen atoms, andY is a cation.

Catalyst for the production of olefin polymers

Polymerization catalysts

촉매조성물을사용한에틸렌중합체및공중합체의제조방법

본 발명은 지지체상에 2 개의 전이 금속 성분을 갖는, 이중 하나의 성분은 메탈로센 형태인 에틸렌 중합 촉매에 관한 것으로서, 상기 지지체는 (i) 마그네슘 알킬이 혼입된 실라놀-함유 실리카와 (ii) 알코올을 반응시킴으로써 제조되는 무수성 물질이다. 상기 촉매는 또한 비-메탈로센 전이 금속 화합물도 포함하며, 단일 반응기내에서, 2 가지 형태의 분자량 분포를 갖는 에틸렌 공중합체를 생성시킨다.

Supported ionic metallocene catalysts for olefin polymerization

Polymerization catalyst for .alpha.-olefin and method for preparing poly-.alpha.-olefin by using it

The present invention is directed to a method for polymerizing an .alpha.-olefin characterized by using a catalyst system which is obtained by reacting a halogenated metallocene compound with an organometallic compound, and then bringing the resultant reaction product into contact with a compound which will be a stable anion by reaction with the reaction product of the halogenated metallocene compound and the organometallic compound. When the method of the present invention is carried out, a polyolefin can be obtained by the use of the inexpensive catalyst in a high activity per unit amount of the catalyst.

Olefin polymerization catalyst, process for its preparation, and its use

A supported polymerization catalyst which is applicable in all polymerization processes is comprised of the reaction product of (A) a supported organoaluminum compound and (B) a metallocene catalyst component.

Method for making and using a supported metallocene catalyst system

The invention relates to a novel process for producing a supported metallocene catalyst system useful for the polymerization and/or copolymerization of olefins, alpha-olefins, and/or diolefins which results in a catalyst product which during polymerization, produces minimal to no reactor fouling and polymer of controlled morphology. The invention is particularly useful for but not limited to polymerizing propylene or copolymerizing propylene with olefins having two or more carbon atoms. The novel support technique described herein results in a catalyst which will obtain polymer product having controlled, uniform particle size, narrow molecular weight distribution, high bulk density and depending upon the metallocene employed and monomers polymerized, stereoregularity.

SUPPORTED CATALYST COMPONENT, SUPPORT CATALYST, PRODUCTION PROCESS, POLYMERIZATION PROCESS, COMPLEX COMPOUNDS AND THEIR PRODUCTION

Catalyst component dispersion comprising an ionic compound and solid addition polymerization catalysts containing the same

A non-supported solid catalyst comprising (a) an ionic compound comprising a.1) a cation and a.2) an anion having up to 100 nonhydrogen atoms and said anion containing at least one substituent comprising an active hydrogen moiety, (b) a transition metal compound, and (c) an organometal compound wherein the metal is selected from the Groups 1-14 of the Periodic Table of the Elements; a supported solid catalyst comprising (a), (b), (c), and (d) a support material, obtainable by combining components (a), (b), (c), and (d) in any order, and wherein during at least one step in the preparation of the solid catalyst, component (a) dissolved in a diluent in which (a) is soluble, is converted into solid form; a method for preparing the solid catalysts; and a process of polymerization using these solid catalysts.

Olefin polymerisation process

The invention relates to the use of a partially hydrolysed aluminum alkyl material in oligomeric form as a scavenger in an olefin polymerisation process, said material containing less than 20 % by Al of unreacted aluminum alkyl, preferably less than 15 %, especially less than 10 %.

Catalyst for polymerizing an olefin and method for producing an olefin polymer

A catalyst for polymerizing an olefin which consists essentially of a product obtained by contacting (A) a metallocene-type transition metal compound, (B) at least one member selected from the group consisting of clay, clay minerals, ion exchanging layered compounds, diatomaceous earth, silicates and zeolites, and (C) an organic aluminum compound.

Comonomer pretreated bimetallic catalyst for blow molding and film applications

The invention relates to a catalyst component which is a contact product of reagents comprising: silica which has a pore volume which exceeds 2.9 cc/gram and an average pore diameter which exceed 400 Angstroms; a metallocene of a first transition metal, activated by an alumoxane; a contact product of dialkylmagnesium and trialkylsilanol; a second transition metal source which exhibits a hydrogen response which is different from that of the metallocene; and an olefin of 4 to 20 carbon atoms. This catalyst component is activated by an aluminum alkyl activator.

Catalyst for polymerizing an olefin and method for producing an olefin polymer

A catalyst for polymerizing an olefin which consists essentially of a product obtained by contacting (A) a metallocene-type transition metal compound, (B) at least one member selected from silicates other than ion exchanging layered compounds, and (C) an organic aluminum compound of the formula AlR⁶ j X 3-j , wherein R⁶ is a C₁₋₂₀ hydrocarbon group, X is hydrogen, halogen or an alkoxy group, and j is a number satisfying 0 < j ≦ 3.

Catalyst for polymerizing an olefin and method for producing an olefin polymer

A catalyst for polymerizing an olefin which consists essentially of a product obtained by contacting (A) a metallocene-type transition metal compound, (B) at least one member selected from the group consisting of clay, clay minerals, ion exchanging layered compounds, diatomaceous earth, silicates and zeolites, and (C) an organic aluminum compound.

Cationic metallocene catalysts based on triphenylcarbenium aluminum

Metallocene catalysts and their preparation and use in the polymerization of olefins. Specifically, the catalysts and processes relate to polymerization of olefins in which an aluminum ionizing agent containing a triphenylcarbenium ion is utilized in preparing the catalyst. The preparation of an olefin polymerization catalyst comprising a metallocene-type catalyst and triphenylcarbenium tetrahedral aluminate is disclosed.

Controlled particle size polyolefins from silica supported prepolymerized matallocene catalyst

The invention relates to a novel process for producing a supported metallocene catalyst system useful for the polymerization and/or copolymerization of olefins, alpha-olefins, and/or diolefins which results in a catalyst product which during polymerization, produces minimal to no reactor fouling and polymer of controlled morphology. The invention is particularly useful for but not limited to polymerizing propylene or copolymerizing propylene with olefins having two or more carbon atoms. The novel support technique described herein results in a catalyst which will obtain polymer product having controlled, uniform particle size, narrow molecular weight distribution, high bulk density and depending upon the metallocene employed and monomers polymerized, stereoregularity.

Polymerization catalyst systems

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst system of the invention provides for a metallocene catalyst and alumoxane activator supported on a porous support using a total volume of catalyst solution that is less than that of which a slurry is formed. The metallocene and alumoxane aer mixed in solution, then the solution is added to a porous support in a volume between the total pore volume of the support and the volume at which a slurry forms. The solvent is then removed, leaving an activated supported metallocene.

Polymerization catalyst systems, their production and use

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process.

Catalyst efficiency for supported metallocene catalyst

The invention provides a polymerization process with improved catalyst activity of a metallocene catalyst supported on silica treated with MAO, a process for supporting a metallocene compound on silica treated with MAO, a metallocene catalyst supported on silica treated with MAO within a certain temperature range and a process for making a metallocene catalyst supported on silica treated with MAO. The invention includes supporting the metallocene compound on a MAO-treated silica at a temperature of below 0° C. The supported catalyst is activated with an aluminum alkyl. The catalyst may be prepolymerized in a tubular reactor prior to being introduced into the polymerization reaction zone.

Polymerization catalyst systems, their production and use

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky ligand transition metal catalyst which when utilized in a polymerization process substantially reduces the reactor fouling and sheeting in a gas, slurry or liquid pool polymerization process.

Polymerization catalyst systems, their production and use

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process.

Process for controlling static in polymerizations utilizing metallocene catalysts

The invention provides a process for producing a polyethylene homopolymer, copolymer, or terpolymer comprising introducing ethylene and optionally at least one alpha olefin having 3 to 18 carbon atoms in a reaction zone containing a metallocene polymerization catalyst under polymerization conditions in the presence of an amine-containing antistatic agent.

Method of Controlling the Relative Activity of the Different Active Centers of Hybrid Catalysts

Method of preparing olefin polymers, which comprises the polymerization of at least one α-olefin in the presence of a hybrid catalyst to produce a polymer comprising at least a higher molecular weight polymer component and a lower molecular weight polymer component in the presence of water in an amount of from 2 to 100 mol ppm and/or carbon dioxide in an amount of from 2 to 100 mol ppm, in each case based on the total reaction mixture, in order to alter the ratio of the higher molecular weight polymer component to the lower molecular weight polymer component. This enables the ratio of the higher molecular weight component to the lower molecular weight component to be controlled selectively.

Method of controlling the relative activity of the different active centers of hybrid catalysts

Method of preparing olefin polymers, which comprises the polymerization of at least one α-olefin in the presence of a hybrid catalyst to produce a polymer comprising at least a higher molecular weight polymer component and a lower molecular weight polymer component in the presence of water in an amount of from 2 to 100 mol ppm and/or carbon dioxide in an amount of from 2 to 100 mol ppm, in each case based on the total reaction mixture, in order to alter the ratio of the higher molecular weight polymer component to the lower molecular weight polymer component. This enables the ratio of the higher molecular weight component to the lower molecular weight component to be controlled selectively.

Heterocyclic metallocenes and polymerization catalysts

A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YjR''iZjj,MeQkP1 wherein Y is a coordinating group containing a six π electron central radical directly coordinating Me, to which are associated one or more radicals containing at least one non-carbon atom selected from B, N, O, Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb and Te; R'' is a divalent bridge between the Y and Z groups; Z is a coordinating group, optionally being equal to Y; Me is a transition metal; Q is halogen or hydrocarbon substituents; P is a counterion; i is 0 or 1; j is 1-3; jj is 0-2; k is 1-3; and l is 0-2.

Catalyst for bimodal molecular weight distribution ethylene polymers and copolymers

The interaction of silica, previously calcined at 600° C., with dibutylmagnesium (DBM), 1-butanol and titanium tetrachloride and a solution of methylalumoxane (MAO) and (BuCp) 2 ZrCl 2 provides a catalyst that, in the absence of a trialkylaluminum (AlR 3 ) cocatalyst, produces polyethylene with a bimodal MWD.

Supported catalyst containing tethered cation forming activator

A support for use in preparing supported catalysts for addition polymerizations comprising the reaction product of: (A) an inorganic oxide material comprising reactive surface hydroxyl groups, at least some of said hydroxyl groups optionally having been functionalized and converted to a reactive silane moiety corresponding to the formula: -OSiR2H, wherein R, independently each occurrence, is hydrogen, C1-20 hydrocarbyl, or C1-20 hydrocarbyloxy, said inorganic oxide or functionalized derivative thereof comprising less than 1.0 mmol of reactive surface hydroxyl functionality per gram; and (B) an activator compound comprising: b1) a cation which is capable of reacting with a transition metal compound to form a catalytically active transition metal complex, and b2) a compatible anion containing at least one substituent able to react with the inorganic oxide, with residual hydroxyl functionality of the inorganic oxide, or with the reactive silane moiety, thereby covalently bonding the compatible anion to the support; catalysts formed therefrom, process of manufacture and the method of use.

Metallocen-verbindungen

Metallocen-Verbindungen der Formel (I), in der CpI und CpII Carbanionen mit einer Cyclopentadienyl-haltigen Struktur darstellen, D ein Donoratom und A ein Akzeptoratom darstellen, wobei D und A durch eine reversible koordinative Bindung derart verknüpft sind, daß die Donorgruppe eine positive (Teil)Ladung und die Akzeptorgruppe eine negative (Teil)Ladung annehmen, M für ein Übergangsmetall der III., IV., V. oder VI. Nebengruppe des Periodensystems der Elemente (Mendelejew) steht, X ein Anionäquivalent bedeutet und n in Abhängigkeit von der Ladung von M die Zahl Null, Eins, Zwei, Drei oder Vier bedeutet, sind neu und können als Katalysatoren für die (Co)Polymerisation von Olefinen, i-Olefinen, Alkinen und/oder Diolefinen oder für die ringöffnende Polyaddition eingesetzt werden. Eine typische Röntgeustrukturanalyse wird durch Formel (18a) dargestellt.

Polymerisation catalyst

A catalyst composition suitable for use in the polymerisation of olefins comprises a discrete metal complex having chelating ligands comprising at least one atom from O, S, N and P bound directly to the metal. The complexes are used in the presence of Lewis acids and may be exemplified by bis(cyclopentadienyl) zirconium complexes. Typical chelating ligands include acetylacetonate and the complexes have the particular advantages of not requiring traditional activators such as MAO.

Catalyst composition having improved comonomer reactivity

Highly soluble olefin polymerization catalyst activator

A catalyst activator, comprising a cation which is a Bronsted acid capable of donating a proton, and an inert, compatible, noncoordinating, anion, characterized by a solubility constant at 25° C. in hexane, cyclohexane or methylcyclohexane of at least 5 weight percent.

[UNK]

Process for the production of polyolefins

A process for the production of polyolefins is provided which comprises polymerizing or copolymerizing olefins in the presence of a catalyst composition which includes a catalyst component (I) resulting from mutual contact of sub-components (A) and (B), and a catalyst component (II). Sub-component (A) is of the formula R.sup.1.sub.p Me.sup.1 X.sup.1.sub.4-p and/or R.sup.1.sub.2 Me.sup.1 X 1' and sub-component (B) is a modified organoaluminum compound having Al--O--Al bonds. Catalyst component (II) is an admixture of sub-component (C), which is a transition metal elemental compound of Groups VII-VIII, and one or more of triethylaluminum, triisobutylaluminum, diethyl zinc, n-butyllithium, and butylmagnesiumchloride. The catalyst components (I) and/or (II) are contacted with a carrier during or after the preparation of the components (I) and/or (II).

Process for preparing an in situ polyethylene blend

A process for the production of an in situ polyethylene blend comprising contacting at least one metallocene based catalyst system with one or more alpha-olefins in each of two or more reactors connected in series, in the gas phase, under polymerization conditions, with the provisos that: (a) ethylene is introduced into each reactor; (b) optionally, an alpha-olefin having at least 3 carbon atoms or a diene is introduced into at least one reactor; (c) - the mixture of ethylene polymer matrix and catalyst formed in the first reactor in the series is transferred to the subsequent reactors in the series;and (d) the polymerization conditions in each reactor are such that a high molecular weight polymer is formed in at least one reactor and a low molecular weight polymer is formed in at least one other reactor.

Catalyst yield from supported metallocene catalysts

The present invention provides a catalyst and a process for increased catalyst activity and polymer yield. The catalyst system used in the process includes at least two supported metallocene catalyst precursor in combination with an oxyorganoaluminum. The process can be applied to the polymerization of olefins, preferably olefin of three carbon atoms and higher, particularly propylene. The catalyst activity and polymer yield for a dual supported metallocene catalyst are increased over that for a single supported metallocene catalyst. The polymer produced by this dual supported metallocene system has a relatively broad molecular weight distribution.

高度可溶性烯烃聚合反应催化活化剂

催化活化剂包含了阳离子，该阳离子为可以提供质子的布鲁斯台德酸，和惰性的、可相容的非配位的阴离子，该催化活化剂的特征为在25℃下在己烷、环己烷或甲基环己烷中至少为5wt%的溶解度常数性。

Mixed catalyst composition for the production of olefin polymers

A mixed catalyst composition comprising a) a solid Ziegler-Natta catalyst; b) a liquid single site catalyst; and c) at least one activating cocatalyst is provided. Polymers having a broad or bimodal molecular weight distribution may be made with this catalyst composition.

Preparation of olefin polymers, e.g. polyethylene, for producing pressure pipes for transport of gas and wastewater, by polymerization of alpha-olefin(s) with hybrid catalyst to produce higher and lower molecular weight polymer components

Preparation of olefin polymers comprises polymerization of alpha -olefin(s) in the presence of a hybrid catalyst to produce a polymer comprising a higher molecular weight polymer component and a lower molecular weight polymer component in the presence of 2-100 mol ppm water and/or 2-100 mol ppm carbon dioxide. Independent claims are also included for: (1) a method of controlling the ratio of a higher molecular weight polymer component to a lower molecular weight polymer component in an olefin polymer; (2) a method of regulating the ratio of a higher molecular weight polymer component to a lower molecular weight polymer component in an olefin polymer using the control method; (3) use of carbon dioxide for decreasing the ratio of a higher molecular weight component to a lower molecular weight component in an olefin polymer; and (4) use of water for increasing the ratio of a higher molecular weight component to a lower molecular weight component in an olefin polymer.

Process for preparing a metallocene-containing catalyst system useful in olefin polymerization

CATALYST SYSTEMS FOR POLYMERIZATION, CONTAINING HETEROCYCLICALLY CONDENSED CYCLOPENTADIENYL LIGANDS

CATALYST SYSTEMS FOR POLYMERIZATION, CONTAINING HETEROCYCLICALLY CONDENSED CYCLOPENTADIENYL LIGANDS

Catalyst systems for the (co) polymerization of alpha olefins

Catalyst and process for the (co)polymerization of alpha-olefins

The invention relates to a catalyst and to a process for the (co)polymerization of alpha-olefins. More precisely, it relates to a catalytic system having an increased activity in the (co)polymerization of alpha-olefin, comprising a metallocene-type catalyst capable to polymerize olefins without aluminoxane, and a weak co-ordinating polar compound. The polymerization process using this catalyst system allows an increased productivity in comparison with the analogous process using metallocene-type catalyst as such.

Methods and catalysts for preventing reactor fouling

Olefin polymerization process with alkyl-substituted metallocenes

The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one π-bonded ring having a C 3 or greater hydrocarbyl, hydrocarbylsilyl or hydrocarbylgermyl substituent said substituent bonded to the ring through a primary carbon atom; and, where the compound contains two π-bonded rings, the total number of substituents on the rings is equal to a number from 3 to 10, said rings being asymmetrically substituted where the number of substituents is 3 or 4. The invention process is particularly suitable for preparing ethylene copolymers having an MIR less than about 35, while retaining narrow CD even at high comonomer incorporation rates, and with certain embodiments providing ethylene copolymers having improved melt strength with the low MIR.

Linear low density polyethylene film

A film of a linear low density copolymer of ethylene (LLDPE) having excellent processability, optical properties and impact strength, which exhibits a density of at least 0.900.

Polymerization catalyst systems, their production and use

Polymerization catalyst systems, their production and use

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst formed by vacuum or pressurized impregnation.

Elastic substantially linear ethlene polymers

A continuous polymerization process of preparing ethylene polymers containing less than about 20 ppm aluminum, and having processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LLDPE). The polymers have processing indices (PI's) less than or equal to 70 percent of those of a comparative linear ethylene polymer and a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a traditional linear ethylene polymer at about the same I 2 and M w /M n . The novel polymers can also have from about 0.01 to about 3 long chain branches/1000 total carbons and have higher low/zero shear viscosity and lower high shear viscosity than comparative linear ethylene polymers. The novel polymers can also be characterized as having a melt flow ratio, I 10 /I 2 , ≧5.63, a molecular weight distribution, M w /M n , defined by the equation: M w /M n ≦(I 10 /I 2 )-4.63, a critical shear stress at onset of gross melt fracture greater than about 4×10 6 dyne/cm 2 , and a single DSC melt peak between -30 C. and 150 C.

Elastic substantially linear ethylene polymers

Elastic ethylene polymers are disclosed which have processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LLDPE). The polymers have processing indices (PI's) less than or equal to 70 percent of those of a comparative linear ethylene polymer and a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a traditional linear ethylene polymer at about the same I 2 and M w /M n . The novel polymers can also have from about 0.01 to about 3 long chain branches/1000 total carbons and have higher low/zero shear viscosity and lower high shear viscosity than comparative linear ethylene polymers. The novel polymers can also be characterized as having a melt flow ratio, I 10 /I 2 , ≧5.63, a molecular weight distribution, M w /M n , defined by the equation: M w /M n ≦(I 10 /I 2 )-4.63, a critical shear stress at onset of gross melt fracture greater than about 4×10 6 dyne/cm 2 , and a single DSC melt peak between -30 C and 150 C.

Polymerization catalyst systems, their production and use

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky ligand transition metal catalyst which when utilized in a polymerization process substantially reduces the reactor fouling and sheeting in a gas, slurry or liquid pool polymerization process.

Metallocenes, their preparation and use as catalysts

Metalloseenejä ja niiden käyttö katalyytteinä

Polymer bound ligands, polymer bound metallocenes, catalyst systems, preparation, and use

A polymer bound ligand represented by the formula QM(R) m and process for preparing same are provided, wherein Q is a polystyrene, M is Si, C, Ge, Sn, P, or N, each R is a that at least one R is a cyclopentadienyl-type compound, and m is 2 or 3, said process comprising reacting a metallated polystyrene and an organohalide compound, wherein the polystyrene is metallated with an alkali metal, and wherein said organohalide compound is represented by the formula XM(R) m wherein X is a halide. Other aspects of the present invention include a polymer bound metallocene represented by the formula QM(R) m ZY n and a process for preparing same, wherein Z is a transition metal, Y is a halide, methyl, hydrogen, or a cyclopentadienyl-type group, and n is 2 or 3. Other aspects of the present invention include a catalyst system comprising the polymer bound metallocene and an organoaluminoxane, a method for preparing same, and a polymerization process employing the catalyst system.

Organometallic catalysts containing hydrotris(pyrazolyl) borate and cyclopentadienyl groups, and processes of employing the same

A catalyst composition is disclosed for catalyzing the polymerization and copolymerization reactions of ethylene monomers, with or without another olefin monomer. The catalyst composition comprises a metallocene compound represented by the the formula of (C 5 R n H 5-n )(L)MXY or the formula of (C 5 R n H 5-n )(L)MX + A - ; wherein: (a) C 5 R n H 5-n is a substituted or unsubstituted cyclopendadienyl group; (b) L is tetrapyrazolyl borate, hydrotrispyrazolyl borate, dihydrotrispyrazolyl borate or hydrotris-3,5-dimethyl; (c) M is Group IIIB, Group IVB, or Group VB transitional metal; (d) X is a C 1 to C 4 alkyl or alkenyl group, an aromatic group, an alkylaryl, a halogen, a hydrogen, or a silane group; (e) Y, which can the same as or different from X, is a C 1 to C 4 alkyl or alkenyl group, an aromatic group, an alkylaryl, a halogen, a hydrogen, or a silane group; and (f) A - is non-coordinated or loosely coordinated bulky anion. Examples of the (C 5 R n H 5-n )(L)MXY and (C 5 R n H 5-n )(L)MX + A - metallocene compounds are represented by the following formulas: ##STR1## respectively.

Olefiinien polymerointikatalysaattorisysteemi, sen valmistus ja käyttö

Polymerization catalyst systems, their production and use

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process, by using a surface modifier.

Verfahren zur Herstellung von Polymerisaten von C¶2¶- bis C¶1¶¶2¶-Alkenen unter Zusatz eines Reaktionsverzögerers

POLYMERIZATION CATALYST SYSTEMS, THEIR PRODUCTION AND USE.

ESTA INVENCION ESTA DIRIGIDA GENERALMENTE HACIA UN SISTEMA CATALIZADOR SOPORTADO UTIL PARA POLIMERIZACION DE OLEFINAS. EL METODO PARA SOPORTAR EL SISTEMA CATALIZADOR DE LA INVENCION PROPORCIONA UN CATALIZADOR DE METALOCENO SOPORTADO Y UN ACTIVADOR DE ALUMOXANO QUE CUANDO SE UTILIZA EN UN PROCESO DE POLIMERIZACION REDUCE SUSTANCIALMENTE EL ATASCO Y COBERTURA DEL REACTOR. THIS INVENTION IS GENERALLY DIRECTED TOWARDS A SUPPORTED CATALYST SYSTEM USEFUL FOR OLEPHINE POLYMERIZATION. THE METHOD FOR SUPPORTING THE CATALYST SYSTEM OF THE INVENTION PROVIDES A SUPPORTED METALOCHENE CATALYST AND ALUMOXANE ACTIVATOR WHICH, WHEN USED IN A POLYMERIZATION PROCESS, REDUCES SUBSTANTIALLY JAM AND REACTOR COVERAGE.

Mettallocene catalyst systems with inorganic oxides as supports

Process for the preparation of polymers of C2 to C12-alkenes using a retarding agent

Method for producing a supported catalyst system

The invention relates to a method for the production of a supported catalyst system. In a first step, an organic or inorganic support material is reacted with a metal compound of general formula (I), M1(R1)r(R2)s(R3)t(R4)n in the presence of an inert solvent, wherein M1 stands for an alkali, an alkaline earth metal or a metal of the third or fourth main group of the periodic table; R1 stands for hydrogen, C¿1? to C10-alkyl, C6 to C15-aryl, alkylaryl or arylalkyl with 1 to 10 C atoms in the alkyl radical and 6 to 20 C atoms in the aryl radical; R?2 to R4¿ stand for hydrogen, halogen, C¿1? to C10-alkyl, C6 to C15-aryl, alkylaryl, arylalkyl, alkoxy, aryloxy or dialkylamino with 1 to 10 C atoms in the alkyl radical and 6 to 20 C atoms in the aryl radical; r is a whole number from 1 to 4 and s, t and u stand for a whole number from 0 to 3, whereby the sum of r+s+t+u corresponds to the valence of M?1¿. In a following step, the suspension thus obtained is reacted with a metallocene complex and a metallocene ion forming compound. The solvent is not evacuated after the first step has been carried out and the following step is conducted without intermediate purification of the pre-treated support material thus obtained.

Polymerization catalyst systems, their production and use

This invention is generally directed toward a catalyst system useful for polymerizing olefins. The method for preparing the catalyst of the invention provides for combining a bulky ligand transition metal catalyst with an activator that has been aged, optionally with a support. The catalyst system is useful in any polymerization process.

Polymerization catalyst systems, their production and use

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported mixed metallocene/non-metallocene catalyst useful in a process for polymerizing olefins.

Process for the syndiotactic propagation of olefins

The invention provides a process for commercial production of syndiotactic polyolefins using a metallocene catalyst supported on silica treated with MAO. The invention includes contacting the supported metallocene catalyst with an aluminum alkyl and aging the catalyst prior to polymerization. In addition, the catalyst is prepolymerized in a tubular reactor prior to being introduced into the polymerization reaction zone.