Transition metal compound, catalyst composition containing the same, and method for producing olefin polymer using the same

Abstract

The present disclosure relates to a novel transition metal compound, a transition metal catalyst composition for producing an olefin polymer containing the same, and a method for producing an olefin polymer using the same. The transition metal compound according to one embodiment has significantly improved solubility in hydrocarbon solvents due to the introduction of a carbazole functional group, allowing the catalytic activity to be maintained high without decline during solution polymerization. Furthermore, the injection and transfer of the transition metal compound during solution polymerization is easy, significantly improving the polymerization process and providing significant advantages for commercialization.

Description

[Technical Field]

[0001] The present disclosure relates to a transition metal compound, a catalyst composition containing the same, and a method for producing an olefin polymer using the same, and more specifically to a transition metal compound having improved solubility due to the introduction of a specific functional group, a catalyst composition containing the same, and a method for producing an olefin polymer using the same. [Background technology]

[0002] Conventionally, the production of ethylene homopolymers or copolymers with α-olefins has typically employed so-called Zigl-Natta catalyst systems, which consist of a titanium or vanadium compound as the main catalyst component and an alkylaluminum compound as the cocatalyst component. While Zigl-Natta catalyst systems exhibit high activity for ethylene polymerization, they generally produce polymers with broad molecular weight distributions due to heterogeneous catalytic active sites. In particular, copolymers of ethylene with α-olefins have a disadvantage in that their composition distributions are not uniform.

[0003] In recent years, so-called metallocene catalyst systems have been developed, which consist of a metallocene compound of a transition metal from Group 4 of the periodic table, such as titanium, zirconium, or hafnium, and the co-catalyst methylaluminoxane. Metallocene catalyst systems are homogeneous catalysts with a single type of catalytically active site, and are therefore characterized by the ability to produce polyethylene with a narrower molecular weight distribution and a more uniform composition distribution than conventional Zigler-Natta catalyst systems. Specific examples include Cp2TiCl2, Cp2ZrCl2, Cp2ZrMeCl, Cp2ZrMe2, and IndH 4 2 By activating metallocene compounds such as ZrCl2 with the co-catalyst methylaluminoxane, it has become possible to polymerize ethylene with high activity and produce polyethylene with a narrow molecular weight distribution (Mw / Mn).

[0004] However, it is difficult to obtain high molecular weight polymers using metallocene catalyst systems. In particular, when applied to solution polymerization methods carried out at high temperatures of 100°C or higher, the polymerization activity drops sharply and the β-hydrogen elimination reaction becomes dominant, making them unsuitable for producing high molecular weight polymers with a high weight average molecular weight (Mw).

[0005] Meanwhile, it is known that constrained geometry ANSA-type metallocene catalysts, in which transition metals are cyclically linked, can be used to produce high catalytic activity and high molecular weight polymers in ethylene homopolymerization or ethylene and α-olefin copolymerization under solution polymerization conditions above 100°C. ANSA-type metallocene catalysts have significantly improved octene injection and high-temperature activity compared to metallocene catalysts. Nevertheless, most previously known ANSA-type metallocene catalysts contain Cl functional groups or methyl groups, which pose problems that must be addressed before they can be used in solution processes.

[0006] The Cl functional group substituted on the catalyst can cause corrosion depending on the material of the process equipment, and to avoid the problem of corrosion caused by Cl, dimethyl-substituted ANSA-type metallocene catalysts have been researched, but their poor solubility makes it difficult to inject the catalyst into the polymerization process.Toluene and xylene can be used to dissolve these catalysts with low solubility, but the use of aromatic solvents such as toluene and xylene is problematic when producing products that may come into contact with food.

[0007] Therefore, there is a strong demand for research into competitive catalysts that have properties such as excellent solubility, high-temperature activity, reactivity with higher α-olefins, and the ability to produce high-molecular-weight polymers. Summary of the Invention [Problem to be solved by the invention]

[0008] An object of one embodiment is to provide a transition metal compound that has excellent solubility and high-temperature activity and is capable of producing a polymer with a high molecular weight, and a catalyst composition containing the same.

[0009] Another object of the present invention is to provide a method for producing an olefin polymer using the transition metal compound according to the above-described embodiment as a catalyst. [Means for solving the problem]

[0010] One embodiment provides a transition metal compound represented by the following formula 1A:

[0011] [Chemical formula 1A] JPEG2025533604000001.jpg3745

[0012] In the above Chemical Formula 1A, M is a transition metal from group 4 of the periodic table; A is carbon or silicon; Cp 1 and Cp 2 are each independently cyclopentadienyl, indenyl, or fluorenyl, and the cyclopentadienyl, indenyl, and fluorenyl may be substituted with one or more selected from the group consisting of (C-C) alkyl, (C-C) alkenyl, (C-C) alkoxy, (C-C) alkoxy(C-C) alkyl, (C-C) cycloalkyl, (C-C) aryl, (C-C) aryl(C-C) alkyl, (C-C) alkyl(C-C) aryl, (C-C) alkylsilyl, and (C-C) arylsilyl; B 1 and B 2are each independently (C-C)alkyl, (C-C)alkenyl, (C-C)alkoxy, (C-C)alkoxy(C-C)alkyl, (C-C)cycloalkyl, (C-C)aryl, (C-C)aryl(C-C)alkyl, (C-C)alkyl(C-C)aryl, (C-C)alkylsilyl, or (C-C)arylsilyl; and X is each independently represented by the following chemical formula 2A: [Chemical formula 2A] JPEG2025533604000002.jpg6143In the above chemical formula 2A, R 15 ~R 22 are each independently hydrogen, (C-C)alkyl, (C-C)alkylsilyl, (C-C)alkoxy, (C-C)cycloalkyl, (C-C)aryl, (C-C)aryl(C-C)alkyl, or (C-C)alkyl(C-C)aryl, and said R 15 ~R 22 The alkyl, alkylsilyl, alkoxy, cycloalkyl, aryl, arylalkyl, and alkylaryl in R may be substituted with one or more selected from the group consisting of halogen, (C1-10) alkyl, (C1-10) alkylamino, (C1-C10) alkoxy, and (C1-C10) alkylsilyl, or 15 ~R 22 adjacent substituents may be linked by a (C3-C12) alkylene or (C3-C12) alkenylene, with or without a fused ring, to form an alicyclic ring or an aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C20) alkyl, (C1-C20) alkoxy, (C1-C20) alkoxy(C1-C20) alkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, and (C6-C20) arylsilyl.

[0013] Another aspect provides a transition metal catalyst composition for producing an olefin polymer, comprising the transition metal compound according to the above aspect and a cocatalyst.

[0014] Another aspect provides a method for producing an olefin polymer, comprising the step of solution polymerizing an olefin monomer in the presence of the transition metal compound according to the above aspect, a cocatalyst, and a hydrocarbon solvent to obtain an olefin polymer. [Effects of the Invention]

[0015] The present disclosure relates to a novel transition metal compound, a transition metal catalyst composition for producing an olefin polymer containing the same, and a method for producing an olefin polymer using the same. The transition metal compound according to one embodiment has significantly improved solubility in hydrocarbon solvents due to the introduction of a carbazole functional group, allowing the catalytic activity to be maintained high without degradation during solution polymerization. Furthermore, the injection and transfer of the transition metal compound during solution polymerization is easy, improving the efficiency of the polymerization process and providing significant advantages for commercialization.

[0016] Furthermore, the transition metal compound according to one embodiment has excellent solubility in hydrocarbon solvents and excellent reactivity with olefin monomers. Therefore, when the transition metal compound is used as a catalyst, olefin polymerization can be carried out very easily, and thus an olefin polymer can be produced in high yield using the transition metal compound.

[0017] Furthermore, in the method for producing an olefin polymer according to one embodiment, a transition metal compound having excellent solubility in hydrocarbon solvents is used as a main catalyst, which facilitates the transportation and injection of the catalyst and is more environmentally friendly, thereby enabling efficient production of an olefin polymer. DETAILED DESCRIPTION OF THE INVENTION

[0018] The embodiments described herein may be modified into various other forms, and therefore the technology according to one aspect is not limited to the embodiments described below. Furthermore, throughout the specification, unless otherwise specified, the terms "comprise," "include," "comprise," "contain," or "have" mean that other components may be further included, but do not exclude additional unrecited elements, materials, or steps.

[0019] Numerical ranges used herein include lower and upper limits, all values ​​within the range, increments logically derived from the form and width of the defined range, all doubly limited values, and all possible combinations of upper and lower limits of numerical ranges limited in different forms. For example, if the content of a composition is limited to 10% to 80% or 20% to 50%, numerical ranges of 10% to 50% or 50% to 80% should also be interpreted as being described herein. Unless otherwise defined herein, values ​​outside the numerical ranges that may occur due to experimental error or rounding of values ​​are also included in the defined numerical range.

[0020] Hereinafter, unless otherwise defined herein, "about" may consider a value within 30%, 25%, 20%, 15%, 10%, or 5% of the stated value.

[0021] Hereinafter, unless otherwise defined herein, the singular forms may be considered to include the plural forms as well.

[0022] As used herein, the terms "substituent," "radical," "group," "moiety," and "fragment" can be used interchangeably.

[0023] Unless the number of carbon atoms is particularly limited, the term "alkyl" used herein refers to a saturated, straight-chain or branched, acyclic hydrocarbon having 1 to 30 carbon atoms. Representative saturated straight-chain alkyls include methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, and n-decyl, while examples of saturated branched alkyls include isopropyl, sec-butyl, isobutyl, tert-butyl, isopentyl, 2-methylhexyl, 3-methylbutyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 2-methylhexyl, 3-methylhexyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 2-methylhexyl, 3-methylhexyl, 4-methylhexyl, 5-methylhexyl, 2,3-dimethylbutyl, 2,3-dimethylpentyl, and 2,4-dimethylpentyl. butyl, 2,3-dimethylhexyl, 2,4-dimethylhexyl, 2,5-dimethylhexyl, 2,2-dimethylpentyl, 2,2-dimethylhexyl, 3,3-dimethylpentyl, 3,3-dimethylhexyl, 4,4-dimethylhexyl, 2-ethylpentyl, 3-ethylpentyl, 2-ethylhexyl, 3-ethylhexyl, 4-ethylhexyl, 2-methyl-2-ethylpentyl, 2-methyl-3-ethylpentyl, 2-methyl-4-ethylpentyl, 2-methyl-2-ethylhexyl, 2-methyl-3-ethylhexyl, 2-methyl-4-ethylhexyl, 2,2-diethylpentyl, 3,3-diethylhexyl, 2,2-diethylhexyl, and 3,3-diethylhexyl.

[0024] As used herein, when a group is described as "C1-C30," it means that the number of carbon atoms is 1 to 30. For example, (C1-C30) alkyl means alkyl having 1 to 30 carbon atoms.

[0025] Unless the number of carbon atoms is particularly limited, the term "alkenyl" as used herein refers to a saturated, straight-chain or branched, acyclic hydrocarbon having 2 to 20 carbon atoms and at least one carbon-carbon double bond. Representative straight chain and branched alkenyls include vinyl, allyl, 1-butenyl, 2-butenyl, isobutylenyl, 1-pentenyl, 2-pentenyl, 3-methyl-1-butenyl, 2-methyl-2-butenyl, 2,3-dimethyl-2-butenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 1-heptenyl, 2-heptenyl, 3-heptenyl, 1-octenyl, 2-octenyl, 3-octenyl, 1-nonenyl, 2-nonenyl, 3-nonenyl, 1-decenyl, 2-decenyl, and 3-decenyl. Such alkenyl groups may be optionally substituted. Alkenyl embraces radicals having cis and trans orientations, or alternatively, E and Z orientations.

[0026] As used herein, "alkoxy" refers to -O-(alkyl), including -OCH, -OCHCH, -O(CH)CH, -O(CH)CH, -O(CH)CH, -O(CH)CH, -O(CH)CH, and the like, where alkyl is defined above.

[0027] As used herein, "alkylene" and "alkenylene" refer to a divalent organic radical derived from an "alkyl" and "alkenyl" by removal of one hydrogen, respectively, and follow the definitions of alkyl and alkenyl, respectively.

[0028] As used herein, "cycloalkyl" refers to a monocyclic or polycyclic saturated ring containing carbon and hydrogen atoms and no carbon-carbon multiple bonds. Examples of cycloalkyl groups include, but are not limited to, (C3-C10)cycloalkyl, such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cycloheptyl. Cycloalkyl groups can be optionally substituted. In one embodiment, a cycloalkyl group is a monocyclic or bicyclic ring.

[0029] As used herein, "aryl" refers to an organic radical derived from an aromatic hydrocarbon by the removal of one hydrogen atom. It includes single or fused ring systems, preferably containing 4 to 7, 5, or 6 ring atoms in each ring, and also includes multiple aryls linked by a single bond. The fused ring system may contain an aliphatic ring, such as a saturated or partially saturated ring, and must contain at least one aromatic ring. The aliphatic ring may also contain nitrogen, oxygen, sulfur, carbonyl, or the like within the ring. Specific examples of the aryl radical include, but are not limited to, phenyl, naphthyl, biphenyl, indenyl, fluorenyl, phenanthrenyl, anthracenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, and 9,10-dihydroanthracenyl.

[0030] By "aryloxy" herein is meant an --O-aryl radical, where "aryl" is defined above.

[0031] Specific examples of "alkylsilyl" and "arylsilyl" used herein include, but are not limited to, trimethylsilyl, triethylsilyl, t-butyldimethylsilyl, vinyldimethylsilyl, propyldimethylsilyl, triphenylsilyl, diphenylsilyl, phenylsilyl, and the like.

[0032] As used herein, "alkylsiloxy" and "arylsiloxy" refer to an --O-alkylsilyl radical and an --O-arylsilyl radical, respectively, where "alkyl" and "aryl" are defined above.

[0033] Unless otherwise specified, the term "carbazole" used herein means a carbazole having a carbon atom substituted with a substituent that can be easily derived by a person skilled in the art in the technical field disclosed herein.

[0034] As used herein, "substituted" means that a hydrogen atom of the substituted moiety, e.g., alkyl, aryl, heteroaryl, heterocycle, or cycloalkyl, is replaced with a substituent. In one embodiment, each carbon atom of the substituted group is not substituted with more than one substituent. In another embodiment, each carbon atom of the substituted group is not substituted with more than one substituent. In the case of a keto substituent, two hydrogen atoms are replaced with oxygen attached to the carbon by a double bond. In connection with the substituent, unless otherwise stated, halogen, hydroxyl, lower alkyl, haloalkyl, mono- or dialkylamino, (C-C) alkyl, (C-C) alkoxy, (C-C) cycloalkyl, (C-C) aryl, (C-C) aryl(C-C) alkyl, (C-C) alkyl(C-C) aryl, (C-C) alkylsilyl, (C- This also includes cases where one or more selected from (C30)arylsilyl, (C6-C30)aryloxy, (C3-C30)alkylsiloxy, (C6-C30)arylsiloxy, (C1-C30)alkylamino, (C6-C30)arylamino, (C1-C30)alkylthio, (C6-C30)arylthio, (C1-C30)alkylphosphine, and (C6-C30)arylphosphine are substituted.

[0035] The term "olefin polymer" as used herein refers to a polymer produced using an olefin within the scope of what would be recognized by a person of ordinary skill in the art of the disclosed technology. Specifically, it includes both an olefin homopolymer and an olefin copolymer, and refers to an olefin homopolymer or a copolymer of an olefin and an α-olefin.

[0036] One aspect provides a transition metal compound represented by the following chemical formula 1A, which is a transition metal compound having a carbazole substituent introduced therein, and which has improved solubility and excellent thermal stability and is therefore useful for olefin polymerization.

[0037] [Chemical formula 1A] JPEG2025533604000003.jpg3745

[0038] In the above Chemical Formula 1A, M is a transition metal from group 4 of the periodic table; A is carbon or silicon; Cp 1 and Cp 2 are each independently cyclopentadienyl, indenyl, or fluorenyl, and the cyclopentadienyl, indenyl, and fluorenyl may be substituted with one or more selected from the group consisting of (C-C) alkyl, (C-C) alkenyl, (C-C) alkoxy, (C-C) alkoxy(C-C) alkyl, (C-C) cycloalkyl, (C-C) aryl, (C-C) aryl(C-C) alkyl, (C-C) alkyl(C-C) aryl, (C-C) alkylsilyl, and (C-C) arylsilyl; B 1 and B 2are each independently (C-C)alkyl, (C-C)alkenyl, (C-C)alkoxy, (C-C)alkoxy(C-C)alkyl, (C-C)cycloalkyl, (C-C)aryl, (C-C)aryl(C-C)alkyl, (C-C)alkyl(C-C)aryl, (C-C)alkylsilyl, or (C-C)arylsilyl; and X is each independently represented by the following chemical formula 2A: [Chemical formula 2A] JPEG2025533604000004.jpg6143In the above chemical formula 2A, R 15 ~R 22 are each independently hydrogen, (C-C)alkyl, (C-C)alkylsilyl, (C-C)alkoxy, (C-C)cycloalkyl, (C-C)aryl, (C-C)aryl(C-C)alkyl, or (C-C)alkyl(C-C)aryl, and said R 15 ~R 22 The alkyl, alkylsilyl, alkoxy, cycloalkyl, aryl, arylalkyl, and alkylaryl in R may be substituted with one or more selected from the group consisting of halogen, (C1-10) alkyl, (C1-10) alkylamino, (C1-C10) alkoxy, and (C1-C10) alkylsilyl, or 15 ~R 22 adjacent substituents may be linked by a (C3-C12) alkylene or (C3-C12) alkenylene, with or without a fused ring, to form a monocyclic or polycyclic alicyclic or aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C20) alkyl, (C1-C20) alkoxy, (C1-C20) alkoxy(C1-C20) alkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, and (C6-C20) arylsilyl.

[0039] The transition metal compound (ANSA-type catalyst) according to one embodiment has a carbazole group represented by Chemical Formula 2A introduced at the X position of Chemical Formula 1A, thereby significantly improving solubility in hydrocarbon solvents, particularly non-aromatic hydrocarbon solvents, and significantly increasing catalytic activity, making it possible to produce olefin polymers using a simple and environmentally friendly process. Furthermore, the transition metal compound according to one embodiment can be used to easily produce olefin polymers using a solution process.

[0040] In one embodiment, R 15 ~R 22 are each independently hydrogen, (C-C)alkyl, (C-C)alkylsilyl, (C-C)alkoxy, (C-C)cycloalkyl, (C-C)aryl, (C-C)aryl(C-C)alkyl, or (C-C)alkyl(C-C)aryl, and said R 15 ~R 22 The alkyl, alkylsilyl, alkoxy, cycloalkyl, aryl, arylalkyl, and alkylaryl in R may be substituted with one or more selected from the group consisting of halogen, (C1-10) alkyl, (C1-10) alkylamino, (C1-C10) alkoxy, and (C1-C10) alkylsilyl, or 15 ~R 22 adjacent substituents may be linked by a (C3-C12) alkylene or (C3-C12) alkenylene, with or without a fused ring, to form a monocyclic or polycyclic alicyclic or aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C10) alkyl, (C1-C10) alkoxy, (C1-C10) alkoxy(C1-C10) alkyl, (C6-C10) aryl, (C6-C10) aryl(C1-C10) alkyl, (C1-C10) alkyl(C6-C10) aryl, (C1-C10) alkylsilyl, and (C6-C10) arylsilyl.

[0041] Or, in one embodiment, the R 15 ~R 22 are each independently hydrogen, (C1-C15) alkyl, (C1-C10) alkyl, (C1-C8) alkyl, (C1-C6) alkyl, (C1-C5) alkyl, (C1-C4) alkyl, (C2-C6) alkyl, (C1-C15) alkylsilyl, (C1-C10) alkylsilyl, (C1-C8) alkylsilyl, (C1-C6) alkylsilyl, (C1-C5) alkylsilyl, (C1-C4) alkylsilyl, (C2-C6) alkyl alkylsilyl, (C1-C15)alkoxy, (C1-C10)alkoxy, (C1-C8)alkoxy, (C1-C6)alkoxy, (C1-C5)alkoxy, (C1-C4)alkoxy, (C2-C6)alkoxy, (C3-C15)cycloalkyl, (C3-C12)cycloalkyl, (C3-C10)cycloalkyl, (C3-C8)cycloalkyl, (C5-C8)cycloalkyl, (C5-C6)cycloalkyl, (C6-C20)aryl aryl, (C6-C15)aryl, (C6-C12)aryl, (C6-C10)aryl, (C6-C9)aryl, (C6-C10)aryl(C1-C15)alkyl, (C6-C10)aryl(C1-C10)alkyl, (C6-C10)aryl(C1-C8)alkyl, (C6-C10)aryl(C1-C6)alkyl, (C6-C10)aryl(C1-C5)alkyl, (C6-C10)aryl(C1-C4)alkyl, ( (C6-C10)aryl(C2-C6)alkyl, (C1-C15)alkyl(C6-C10)aryl, (C1-C10)alkyl(C6-C10)aryl, (C1-C8)alkyl(C6-C10)aryl, (C1-C6)alkyl(C6-C10)aryl, (C1-C5)alkyl(C6-C10)aryl, (C1-C4)alkyl(C6-C10)aryl, or (C2-C6)alkyl(C6-C10)aryl, wherein R 15 ~R 22The alkyl, alkylsilyl, alkoxy, cycloalkyl, aryl, arylalkyl, and alkylaryl may be substituted with one or more selected from the group consisting of halogen, (C1-C8)alkyl, (C1-C5)alkyl, (C1-C3)alkyl, (C1-C8)alkylamino, (C1-C5)alkylamino, (C1-C3)alkylamino, (C1-C8)alkoxy, (C1-C5)alkoxy, (C1-C3)alkoxy, (C1-C8)alkylsilyl, (C1-C5)alkylsilyl, and (C1-C3)alkylsilyl.

[0042] Or, in one embodiment, the R 15 ~R 22adjacent substituents may be linked by a (C3-C10) alkylene, (C3-C8) alkylene, (C3-C6) alkylene, (C3-C5) alkylene, (C3-C4) alkylene, (C3-C10) alkenylene, (C3-C8) alkenylene, (C3-C6) alkenylene, (C3-C5) alkenylene, or (C3-C4) alkenylene, with or without fused rings, to form a monocyclic or polycyclic alicyclic or aromatic ring. In addition, the formed alicyclic ring or aromatic ring may be (C1-C8) alkyl, (C1-C6) alkyl, (C1-C5) alkyl, (C1-C4) alkyl, (C2-C6) alkyl, (C1-C8) alkoxy, (C1-C6) alkoxy, (C1-C5) alkoxy, (C1-C4) alkoxy, (C2-C6) alkoxy, (C1-C10) alkoxy(C1-C8) alkyl, (C1-C10) alkoxy(C1-C6) alkyl, (C1-C10) alkoxy(C1-C5) alkyl, (C1-C10) alkoxy(C1-C4) alkyl, (C1-C10) alkoxy(C2-C6) and optionally substituted with one or more selected from the group consisting of alkyl, (C6-C9)aryl, (C6-C8)aryl, (C6-C10)aryl(C1-C8)alkyl, (C6-C10)aryl(C1-C6)alkyl, (C6-C10)aryl(C1-C5)alkyl, (C6-C10)aryl(C1-C4)alkyl, (C6-C10)aryl(C2-C6)alkyl, (C1-C8)alkylsilyl, (C1-C6)alkylsilyl, (C1-C5)alkylsilyl, (C1-C4)alkylsilyl, (C6-C9)arylsilyl, and (C6-C8)arylsilyl.

[0043] Specifically, in one embodiment, the R 15 , R 16 , R 18 , R 19 , R 21 , and R 22 may be hydrogen, and said R 17 and R 20 may be a tert-butyl group.

[0044] In one embodiment, the B1 and B 2are each independently (C1-C15) alkyl, (C1-C10) alkyl, (C1-C8) alkyl, (C1-C6) alkyl, (C1-C5) alkyl, (C1-C4) alkyl, (C2-C6) alkyl, (C2-C20) alkenyl, (C2-C15) alkenyl, (C2-C10) alkenyl, (C2-C8) alkenyl, (C2-C6) alkenyl, (C2-C5) alkenyl, (C2-C4) alkenyl, (C1-C15) alkoxy, (C1-C10) alkoxy, (C1-C8) alkoxy, (C1-C6) alkoxy, (C1-C 5) Alkoxy, (C1-C4)alkoxy, (C2-C6)alkoxy, (C1-C6)alkoxy(C1-C15)alkyl, (C1-C6)alkoxy(C1-C10)alkyl, (C1-C6)alkoxy(C1-C8)alkyl, (C1-C6)alkoxy(C1-C6)alkyl, (C1-C6)alkoxy(C1-C5)alkyl, (C1-C6)alkoxy(C1-C4)alkyl, (C1-C6)alkoxy(C2-C6)alkyl, (C3-C15)cycloalkyl, (C3-C12)cycloalkyl, (C3-C10)cycloalkyl aryl, (C3-C8)cycloalkyl, (C5-C8)cycloalkyl, (C5-C6)cycloalkyl, (C6-C20)aryl, (C6-C15)aryl, (C6-C12)aryl, (C6-C10)aryl, (C6-C9)aryl, (C6-C10)aryl(C1-C15)alkyl, (C6-C10)aryl(C1-C10)alkyl, (C6-C10)aryl(C1-C8)alkyl, (C6-C10)aryl(C1-C6)alkyl, (C6-C10)aryl(C1-C5)alkyl, (C6-C10)aryl(C1-C 4) alkyl, (C6-C10)aryl(C2-C6)alkyl, (C1-C15)alkyl(C6-C10)aryl, (C1-C10)alkyl(C6-C10)aryl, (C1-C8)alkyl(C6-C10)aryl, (C1-C6)alkyl(C6-C10)aryl, (C1-C5)alkyl(C6-C10)aryl, (C1-C4)alkyl(C6-C10)aryl, or (C2-C6)alkyl(C6-C10)aryl, (C1-C15)alkylsilyl, (C1-C10)alkylsilyl, (C1-C8)alkylsilyl,It may be (C1-C6) alkylsilyl, (C1-C5) alkylsilyl, (C1-C4) alkylsilyl, (C2-C6) alkylsilyl, (C6-C20) arylsilyl, (C6-C15) arylsilyl, (C6-C12) arylsilyl, (C6-C10) arylsilyl, or (C6-C9) arylsilyl, and specifically may be phenyl.

[0045] In one embodiment, the transition metal compound may be a compound represented by the following Formula 1B:

[0046] [Chemical formula 1B] JPEG2025533604000005.jpg7361

[0047] In the above Chemical Formula 1B, M is a transition metal from group 4 of the periodic table; A is carbon or silicon; R 1 ~R 4 are each independently hydrogen or (C1-C20) alkyl; R 5 ~R 12 are each independently hydrogen, (C-C)alkyl, (C-C)alkoxy, (C-C)cycloalkyl, (C-C)aryl, (C-C)aryl(C-C)alkyl, (C-C)alkyl(C-C)aryl, (C-C)alkylsilyl, or (C-C)arylsilyl; 5 ~R 12adjacent substituents may be linked by a (C3-C12) alkylene or (C3-C12) alkenylene, with or without a fused ring, to form an alicyclic ring or an aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C10) alkyl, (C1-C10) alkoxy, (C1-C10) alkoxy(C1-C10) alkyl, (C6-C10) aryl, (C6-C10) aryl(C1-C10) alkyl, (C1-C10) alkyl(C6-C10) aryl, (C1-C10) alkylsilyl, and (C6-C10) arylsilyl; and R 13 and R 14 are each independently (C6-C20)aryl.

[0048] In one embodiment, M may be, for example, Ti, Zr, or Hf.

[0049] In one embodiment, R 1 ~R 4 may each independently be hydrogen or (C1-C15) alkyl, (C1-C10) alkyl, (C1-C8) alkyl, (C1-C6) alkyl, (C1-C5) alkyl, (C1-C4) alkyl, (C1-C3) alkyl, or (C2-C6) alkyl.

[0050] In one embodiment, R 5 ~R 12are each independently hydrogen, (C1-C15)alkyl, (C1-C10)alkyl, (C1-C8)alkyl, (C1-C6)alkyl, (C1-C5)alkyl, (C1-C4)alkyl, (C1-C3)alkyl, (C2-C6)alkyl, (C1-C15)alkoxy, (C1-C10)alkoxy, (C1-C8)alkoxy, (C1-C6)alkoxy, (C1-C5)alkoxy, (C1-C4)alkoxy, (C1-C3)alkoxy, (C2-C6)alkoxy, (C3-C15 )cycloalkyl, (C3-C12)cycloalkyl, (C3-C10)cycloalkyl, (C3-C8)cycloalkyl, (C5-C8)cycloalkyl, (C5-C6)cycloalkyl, (C6-C15)aryl, (C6-C12)aryl, (C6-C10)aryl, (C6-C9)aryl, (C6-C10)aryl(C1-C15)alkyl, (C6-C10)aryl(C1-C10)alkyl, (C6-C10)aryl(C1-C8)alkyl, (C6-C10)aryl(C 1-C6) alkyl, (C6-C10) aryl (C1-C5) alkyl, (C6-C10) aryl (C1-C4) alkyl, (C6-C10) aryl (C2-C6) alkyl, (C1-C15) alkyl (C6-C10) aryl, (C1-C10) alkyl (C6-C10) aryl, (C1-C8) alkyl (C6-C10) aryl, (C1-C6) alkyl (C6-C10) aryl, (C1-C5) alkyl (C6-C10) aryl, (C1-C4) alkyl (C6-C10) aryl or (C2-C6)alkyl(C6-C10)aryl, (C1-C15)alkylsilyl, (C1-C10)alkylsilyl, (C1-C8)alkylsilyl, (C1-C6)alkylsilyl, (C1-C5)alkylsilyl, (C1-C4)alkylsilyl, (C2-C6)alkylsilyl, (C6-C20)arylsilyl, (C6-C15)arylsilyl, (C6-C12)arylsilyl, (C6-C10)arylsilyl, or (C6-C9)arylsilyl.

[0051] Or, in one embodiment, the R 5 ~R 12adjacent substituents may be linked by a (C3-C10) alkylene, (C3-C8) alkylene, (C3-C6) alkylene, (C3-C5) alkylene, (C3-C4) alkylene, (C3-C10) alkenylene, (C3-C8) alkenylene, (C3-C6) alkenylene, (C3-C5) alkenylene, or (C3-C4) alkenylene, with or without fused rings, to form a monocyclic or polycyclic alicyclic or aromatic ring. The alicyclic ring and aromatic ring may be substituted with one or more selected from the group consisting of (C1-C10) alkyl, (C1-C10) alkoxy, (C1-C10) alkoxy(C1-C10) alkyl, (C6-C10) aryl, (C6-C10) aryl(C1-C10) alkyl, (C1-C10) alkyl(C6-C10) aryl, (C1-C10) alkylsilyl, and (C6-C10) arylsilyl.

[0052] In one embodiment, R 13 and R 14 may each independently be (C6-C15)aryl, (C6-C12)aryl, (C6-C10)aryl, (C6-C9)aryl, or phenyl.

[0053] In one embodiment, the transition metal compound may be a compound represented by the following Formula 1C:

[0054] [Chemical formula 1C] JPEG2025533604000006.jpg6346

[0055] In the above Chemical Formula 1, M is Ti, Zr, or Hf; A is carbon or silicon; R 1 ~R 4 are each independently hydrogen or (C1-C20) alkyl, and R 13 and R 14 are each independently (C6-C10)aryl.

[0056] In one embodiment, R 1 ~R 4 may each independently be (C1-C15) alkyl, (C1-C10) alkyl, (C1-C8) alkyl, (C1-C6) alkyl, (C1-C5) alkyl, (C1-C4) alkyl, (C1-C3) alkyl, or (C2-C6) alkyl.

[0057] In one embodiment, R 13 and R 14 may each independently be (C6-C8)aryl or phenyl.

[0058] In one embodiment, the compound represented by Formula 1A, Formula 1B, or Formula 1C is specifically JPEG2025533604000007.jpg5449, JPEG2025533604000008.jpg5762, JPEG2025533604000009.jpg6668, JPEG2025533604000010.jpg5449, JPEG2025533604000011.jpg5455, JPEG2025533604000012.jpg5762, or JPEG2025533604000013.jpg6667. However, the above compounds are merely examples and are not necessarily limited thereto.

[0059] In one embodiment, the compound represented by Chemical Formula 2A has a characteristic substituent that realizes excellent activity of the transition metal compound according to one aspect, and specific examples thereof include: JPEG2025533604000014.jpg4129, JPEG2025533604000015.jpg5530, JPEG2025533604000016.jpg4634, JPEG2025533604000017.jpg6830, JPEG2025533604000018.jpg6141, JPEG2025533604000019.jpg7542, JPEG2025533604000020.jpg6830, JPEG2025533604000021.jpg6041, JPEG2025533604000022.jpg6847, JPEG2025533604000023.jpg6855, JPEG2025533604000024.jpg6031, JPEG2025533604000025.jpg5145, JPEG2025533604000026.jpg6741, or JPEG2025533604000027.jpg6171. However, the above compounds are merely examples and are not necessarily limited thereto.

[0060] In one embodiment, specific examples of the transition metal compounds include: JPEG2025533604000028.jpg10097 or JPEG2025533604000029.jpg125109. However, the above compounds are merely examples and are not necessarily limited thereto, and any compound represented by Chemical Formula 1A, Chemical Formula 1B, or Chemical Formula 1C and including a carbazole group represented by Chemical Formula 2A should be considered to include a technical means capable of achieving the intended effect or solving the problem to be solved in one embodiment.

[0061] The transition metal compound according to one embodiment includes a carbazole substituent, which significantly improves its solubility in solvents, specifically in hydrocarbon solvents. In particular, the transition metal compound according to one embodiment exhibits excellent solubility not only in aromatic hydrocarbon solvents such as toluene, benzene, ethylbenzene, xylene, naphthalene, methylnaphthalene, anthracene, acenaphthene, and phenanthrene, but also in non-aromatic hydrocarbon solvents such as methylcyclohexane, cyclohexane, n-heptane, n-hexane, n-butane, isobutane, n-pentane, n-octane, isooctane, nonane, decane, and dodecane. For example, the transition metal compound according to one embodiment may have a solubility in hydrocarbon solvents at 25° C. of 5 wt % or more, 6 wt % or more, 7 wt % or more, or 7.5 wt % or more. In one embodiment, the hydrocarbon solvent may be a non-aromatic hydrocarbon or an aromatic hydrocarbon. In particular, the solubility in aromatic hydrocarbon solvents may be 20% by weight or more, 30% by weight or more, 35% by weight or more, 40% by weight or more, or 45% by weight or more. Alternatively, the solubility in non-aromatic hydrocarbon solvents may be 10% by weight or more, 15% by weight or more, 20% by weight or more, 25% by weight or more, or 30% by weight or more. The upper limit of the solubility range may be 100% by weight or less, 80% by weight or less, 70% by weight or less, 60% by weight or less, 50% by weight or less, 48% by weight or less, or 46% by weight or less.

[0062] Another aspect provides a transition metal catalyst composition comprising the transition metal compound according to the above aspect and a co-catalyst, wherein the transition metal catalyst composition may be used for producing an olefin polymer.

[0063] The transition metal compound is the same as that described above for the transition metal compound according to the embodiment, and therefore will not be described further below.

[0064] In one embodiment, the co-catalyst may comprise one or more selected from aluminum compounds, boron compounds, and mixtures thereof.

[0065] In one embodiment, the boron compound may be selected from the compounds represented by the following Chemical Formulas 3A to 3D.

[0066] [Chemical formula 3A] B(R 23 )3

[0067] [Chemical formula 3B] [R 24 ] + [B(R 23 )4] -

[0068] [Chemical formula 3C] [R 25 p ZH] + [R 23 4] -

[0069] [Chemical formula 3D] JPEG2025533604000030.jpg2775

[0070] In Chemical Formulae 3A to 3D, B is boron, R 23 are each independently phenyl substituted or unsubstituted with one or more substituents selected from the group consisting of fluorine, (C1-C20) alkyl, fluorine-substituted (C1-C20) alkyl, (C1-C20) alkoxy, and fluorine-substituted (C1-C20) alkoxy; R 24 is a (C5-C7) aromatic radical, a (C1-C20) alkyl(C6-C20) aryl radical, or a (C6-C20) aryl(C1-C20) alkyl radical; Z is nitrogen or phosphorus; R 25 are each independently a (C1-20) alkyl radical or a (C1-C10) alkyl disubstituted anilinium radical; R 26 is (C5-C20) alkyl, R27 is (C5-C20)aryl or (C1-20)alkyl(C5-C20)aryl, and p is 2 or 3.

[0071] In one embodiment, R 23 may each independently be phenyl substituted or unsubstituted with one or more substituents selected from the group consisting of fluorine, (C1-C15) alkyl substituted or unsubstituted with fluorine, (C1-C10) alkyl, (C1-C8) alkyl, (C1-C6) alkyl, (C1-C5) alkyl, (C1-C4) alkyl, (C1-C3) alkyl, (C2-C6) alkyl, and (C1-C15) alkoxy, (C1-C10) alkoxy, (C1-C8) alkoxy, (C1-C6) alkoxy, (C1-C5) alkoxy, (C1-C4) alkoxy, (C1-C3) alkoxy, (C2-C6) alkoxy which are substituted or unsubstituted with fluorine.

[0072] In one embodiment, R 24 is (C5-C6) aromatic radical, (C1-C10) alkyl (C6-C20) aryl radical, (C1-C10) alkyl (C6-C15) aryl radical, (C1-C10) alkyl (C6-C12) aryl radical, (C1-C10) alkyl (C6-C10) aryl radical, (C1-C10) alkyl (C6-C9) aryl radical, (C6-C10) aryl (C1-C15) alkyl radical, (C6-C10) It may be an aryl(C1-C10)alkyl radical, a (C6-C10)aryl(C1-C8)alkyl radical, a (C6-C10)aryl(C1-C6)alkyl radical, a (C6-C10)aryl(C1-C5)alkyl radical, a (C6-C10)aryl(C1-C4)alkyl radical, a (C6-C10)aryl(C1-C3)alkyl radical, or a (C6-C10)aryl(C2-C6)alkyl radical.

[0073] In one embodiment, R 25are each independently a (C1-C15) alkyl radical, a (C1-C10) alkyl radical, a (C1-C8) alkyl radical, a (C1-C6) alkyl radical, a (C1-C5) alkyl radical, a (C1-C4) alkyl radical, a (C1-C3) alkyl radical, or a (C2-C6) alkyl radical, or an anilinium radical disubstituted with a (C1-C10) alkyl, a (C1-C8) alkyl, a (C1-C6) alkyl, a (C1-C5) alkyl, a (C1-C4) alkyl, a (C1-C3) alkyl, or a (C2-C6) alkyl. The alkyl substituent disubstituted on the anilinium radical may be substituted on a nitrogen atom of the anilinium.

[0074] In one embodiment, R 26 may be (C5-C15) alkyl, (C5-C10) alkyl, (C5-C8) alkyl, or (C5-C6) alkyl.

[0075] In one embodiment, R 27 may be (C5-C15)aryl, (C5-C10)aryl, (C5-C8)aryl, (C5-C6)aryl, (C1-10)alkyl(C5-C20)aryl, (C1-10)alkyl(C5-C15)aryl, (C1-10)alkyl(C5-C10)aryl, (C1-10)alkyl(C5-C8)aryl, or (C1-10)alkyl(C5-C6)aryl.

[0076] In one embodiment, examples of the boron compound include trityl tetrakispentafluorophenylborate, trispentafluorophenylborane, tris2,3,5,6-tetrafluorophenylborane, tris2,3,4,5-tetrafluorophenylborane, tris3,4,5-trifluorophenylborane, tris2,3,4-trifluorophenylborane, phenylbispentafluorophenylborane, tetrakispentafluorophenylborate, tetrakis2,3,5,6-tetrafluorophenylborate, tetrakis2,3,4,5-tetrafluorophenylborate, tetrakis3,4,5-trifluorophenylborate, tetrakis2,2,4-trifluorophenylborate, phenylbispentafluorophenylborate, and tetrakis3,5-bistrifluoromethylphenylborate.Specific examples of these compounds include ferrocenium tetrakispentafluorophenylborate, 1,1'-dimethylferrocenium tetrakispentafluorophenylborate, silver tetrakispentafluorophenylborate, triphenylmethyl tetrakispentafluorophenylborate, triphenylmethyl tetrakis3,5-bistrifluoromethylphenylborate, triethylammonium tetrakispentafluorophenylborate, tripropylammonium tetrakispentafluorophenylborate, tri-normal-butylammonium tetrakispentafluorophenylborate, tri-normal-butylammonium tetrakis3,5-bistrifluoromethylphenylborate, N,N-dimethylaniline, and N,N-dimethylanilinium tetrakis-3,5-bistrifluoromethylphenylborate, diisopropylammonium tetrakis-pentafluorophenylborate, dicyclohexylammonium tetrakis-pentafluorophenylborate, triphenylphosphonium tetrakis-pentafluorophenylborate, trimethylphenylphosphonium tetrakis-pentafluorophenylborate, or tridimethylphenylphosphonium tetrakis-pentafluorophenylborate.

[0077] In one embodiment, the aluminum compound may be selected from aluminoxane compounds represented by the following Chemical Formula 4A or 4B, organoaluminum compounds represented by the following Chemical Formula 4C, or organoaluminum alkyloxide or organoaluminum aryloxide compounds represented by the following Chemical Formula 4D or 4E.

[0078] [Chemical formula 4A] (-AlR 28 -O-) m

[0079] [Chemical formula 4B] (R 29 )2Al-(-OR 29 -) q (-O-)Al(R 29 )2

[0080] [Chemical formula 4C] (R 30 ) r Al(E) 3-r

[0081] [Chemical formula 4D] (R 31 )2AlOR 32

[0082] [Chemical formula 4E] R 31 Al(OR 32 )2

[0083] In the chemical formulas 4A to 4E, R 28 and R 29 are each independently (C1-C20) alkyl; m and q are each independently an integer of 5 to 20; R 30 and R 31 are each independently (C1-C20) alkyl; E is hydrogen or halogen; r is an integer from 1 to 3, and R 32 is (C1-C20) alkyl or (C6-C30) aryl.

[0084] In one embodiment, R 28 and R 29 may each independently be (C1-C15) alkyl, (C1-C10) alkyl, (C1-C8) alkyl, (C1-C6) alkyl, (C1-C5) alkyl, (C1-C4) alkyl, (C1-C3) alkyl, or (C2-C6) alkyl.

[0085] In one embodiment, m and q may each independently be an integer of 5 to 15, 5 to 10, or 5 to 8.

[0086] In one embodiment, R 30 and R 31 may each independently be (C1-C15) alkyl, (C1-C10) alkyl, (C1-C8) alkyl, (C1-C6) alkyl, (C1-C5) alkyl, (C1-C4) alkyl, (C1-C3) alkyl, or (C2-C6) alkyl.

[0087] In one embodiment, r may be 1, 2, or 3.

[0088] In one embodiment, R 32 may be (C-C)alkyl, (C-C)alkyl, (C-C)alkyl, (C-C)alkyl, (C-C)alkyl, (C-C)alkyl, (C-C)alkyl, (C-C)alkyl, (C-C)aryl, (C-C)aryl, (C-C)aryl, (C-C)aryl, (C-C)aryl, or (C-C)aryl.

[0089] In one embodiment, examples of the aluminum compound include methylaluminoxane, modified methylaluminoxane, and tetraisobutylaluminoxane. Examples of the organoaluminum compound include trialkylaluminums such as trimethylaluminum, triethylaluminum, tripropylaluminum, triisobutylaluminum, and trihexylaluminum, dialkylaluminum chlorides such as dimethylaluminum chloride, diethylaluminum chloride, dipropylaluminum chloride, diisobutylaluminum chloride, and dihexylaluminum chloride, methylaluminum dichloride, ethylaluminum dichloride, and propylaluminum dichloride. alkylaluminum dichlorides including dimethylaluminum hydride, diethylaluminum hydride, dipropylaluminum hydride, diisobutylaluminum hydride, and dihexylaluminum hydride; dialkylaluminum hydrides including dimethyldimethoxyaluminum, dimethylmethoxyaluminum, ethyldiethoxyaluminum, diethylethoxyaluminum, isobutyldibutoxyaluminum, diisobutylbutoxyaluminum, hexyldimethoxyaluminum, dihexylmethoxyaluminum, and dioctylmethoxyaluminum.

[0090] In one embodiment, the olefin polymer may be an ethylene homopolymer or a copolymer of ethylene and an α-olefin.

[0091] Another aspect provides a method for producing an olefin polymer, comprising the step of solution polymerizing an olefin monomer in the presence of the transition metal compound according to the above aspect, a cocatalyst, and a hydrocarbon solvent to obtain an olefin polymer.

[0092] The above-mentioned explanations regarding the transition metal compound, co-catalyst, and olefin polymer are applicable, and therefore will not be repeated below.

[0093] In one embodiment, the hydrocarbon solvent may be a C3-C20 non-aromatic hydrocarbon solvent, such as one or more non-aromatic hydrocarbon solvents selected from the group consisting of methylcyclohexane, cyclohexane, n-heptane, n-hexane, n-butane, isobutane, n-pentane, n-octane, isooctane, nonane, decane, and dodecane. Alternatively, the hydrocarbon solvent may be a C3-C20 aromatic hydrocarbon solvent, such as one or more aromatic hydrocarbon solvents selected from the group consisting of toluene, benzene, ethylbenzene, xylene, naphthalene, methylnaphthalene, anthracene, acenaphthene, and phenanthrene.

[0094] The transition metal compound according to one embodiment includes a carbazole substituent, which significantly improves its solubility in solvents, specifically in hydrocarbon solvents. In particular, the transition metal compound according to one embodiment exhibits excellent solubility not only in aromatic hydrocarbon solvents such as toluene, benzene, ethylbenzene, xylene, naphthalene, methylnaphthalene, anthracene, acenaphthene, and phenanthrene, but also in non-aromatic hydrocarbon solvents such as methylcyclohexane, cyclohexane, n-heptane, n-hexane, n-butane, isobutane, n-pentane, n-octane, isooctane, nonane, decane, and dodecane. For example, the transition metal compound according to one embodiment may have a solubility in hydrocarbon solvents at 25° C. of 5 wt % or more, 6 wt % or more, 7 wt % or more, or 7.5 wt % or more. In one embodiment, the hydrocarbon solvent may be a non-aromatic hydrocarbon or an aromatic hydrocarbon. In particular, the solubility in aromatic hydrocarbon solvents may be 20% by weight or more, 30% by weight or more, 35% by weight or more, 40% by weight or more, or 45% by weight or more. Alternatively, the solubility in non-aromatic hydrocarbon solvents may be 10% by weight or more, 15% by weight or more, 20% by weight or more, 25% by weight or more, or 30% by weight or more. The upper limit of the solubility range may be 100% by weight or less, 80% by weight or less, 70% by weight or less, 60% by weight or less, 50% by weight or less, 48% by weight or less, or 46% by weight or less.

[0095] In one embodiment, the solution polymerization may be carried out at 100°C to 200°C, 100°C to 180°C, 100°C to 150°C, 100°C to 140°C, 110°C to 130°C, or about 120°C.

[0096] In the method for producing an olefin polymer according to one embodiment, the molar ratio of the transition metal compound to the co-catalyst may be 1:0.05 to 1:10,000.

[0097] In one embodiment of the method for producing an olefin polymer, the molar ratio of the transition metal in the transition metal compound to the boron atoms contained in the co-catalyst may be 1:0.01 to 1:100, or 1:0.05 to 1:5. Alternatively, the molar ratio of the transition metal in the transition metal compound to the aluminum atoms contained in the co-catalyst may be 1:10 to 1:1,000, or 1:25 to 1:500.

[0098] According to one embodiment, the method for producing an olefin polymer may be carried out by contacting the transition metal compound, the cocatalyst, and ethylene, or optionally, a vinyl comonomer, in the presence of a hydrocarbon solvent. In this case, the transition metal compound and the cocatalyst may be separately charged into a reactor, or the components may be premixed and charged into the reactor. The mixing conditions, such as the charging order, temperature, and concentration, are not particularly limited.

[0099] In one embodiment, when a copolymer of ethylene and an α-olefin is produced, a (C3-C18) α-olefin may be used as a comonomer together with ethylene, such as one or more selected from propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-hexadecene, and 1-octadecene. More specifically, ethylene may be copolymerized with 1-butene, 1-hexene, 1-octene, or 1-decene.

[0100] In one embodiment, the ethylene pressure may be from 1 atmosphere to 1,000 atmospheres, or from 10 atmospheres to 150 atmospheres.

[0101] The copolymer produced by the production method according to one embodiment may contain ethylene-derived units in an amount of 30% to 99% by weight, 30% to 80% by weight, 50% to 99% by weight, or 60% to 99% by weight, based on the total weight.

[0102] In one embodiment of the method for producing an olefin polymer, linear low-density polyethylene (LLDPE) produced using a (C4-C10) α-olefin as a comonomer has a density range of 0.940 g / cc or less, and can be extended to very low density polyethylene (VLDPE, ULDPE), or olefin elastomers. In one embodiment, hydrogen may be used as a molecular weight regulator to control the molecular weight during the production of the ethylene copolymer, and the produced copolymer may have a weight-average molecular weight (Mw) of 80,000 g / mol to 500,000 g / mol.

[0103] As a specific example of an olefin-diene copolymer produced by the catalyst composition according to an embodiment, an ethylene-propylene-diene copolymer having an ethylene (or ethylene-derived units) content of 30 wt% to 80 wt%, a propylene (or propylene-derived units) content of 20 wt% to 70 wt%, and a diene (or diene-derived units) content of 0 to 15 wt% can be produced. In one embodiment, diene monomers that can be used have two or more double bonds, such as 1,4-hexadiene, 1,5-hexadiene, 1,5-heptadiene, 1,6-heptadiene, 1,6-octadiene, 1,7-octadiene, 1,7-nonadiene, 1,8-nonadiene, 1,8-decadiene, 1,9-decadiene, 1,12-tetradecadiene, 1,13-tetradecadiene, 3-methyl-1,4-hexadiene, 3-methyl-1,5 ... hexadiene, 3-ethyl-1,4-hexadiene, 3-ethyl-1,5-hexadiene, 3,3-dimethyl-1,4-hexadiene, 3,3-dimethyl-1,5-hexadiene, 5-vinyl-2-norbornene, 2,5-norbornadiene, 7-methyl-2,5-norbornadiene, 7-ethyl-2,5-norbornadiene, 7-propyl-2,5-norbornadiene, 7-butyl-2,5-norbornadiene, 7-phenyl-2,5-norbornadiene norbornadiene, 7-hexyl-2,5-norbornadiene, 7,7-dimethyl-2,5-norbornadiene, 7-methyl-7-ethyl-2,5-norbornadiene, 7-chloro-2,5-norbornadiene, 7-bromo-2,5-norbornadiene, 7-fluoro-2,5-norbornadiene, 7,7-dichloro-2,5-norbornadiene, 1-methyl-2,5-norbornadiene, 1-ethyl-2,5-norbornadiene, 1-propyl-2 ,5-Norbornadiene, 1-butyl-2,5-norbornadiene, 1-chloro-2,5-norbornadiene, 1-bromo-2,5-norbornadiene, 5-isopropyl-2-norbornene, 1,4-cyclohexadiene, bicyclo 2,2,1 hepta-2,5-diene, 5-ethylidene-2-norbornene, 5-methylene-2-norbornene, bicyclo 2,2,2 octa-2,5-diene, 4-vinylcyclohex-1-ene, bicyclo 2,The diene monomer may be one or more selected from 2,2-octa-2,6-diene, 1,7,7-trimethylbicyclo-2,2,1hepta-2,5-diene, dicyclopentadiene, phenyltetrahydroindene, 5-arylbicyclo-2,2,1hepta-2-ene, 1,5-cyclooctadiene, 1,4-diarylbenzene, butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-butadiene, 4-methyl-1,3-pentadiene, 1,3-pentadiene, 3-methyl-1,3-pentadiene, 2,4-dimethyl-1,3-pentadiene, and 3-ethyl-1,3-pentadiene. The diene monomer may be selected depending on the processing characteristics of the ethylene-propylene-diene copolymer.

[0104] Generally, when producing an ethylene-propylene-diene copolymer, increasing the propylene content results in a decrease in the molecular weight of the copolymer. However, in the production of an ethylene-propylene-diene copolymer according to one embodiment, even when the propylene content is increased up to 50 wt%, the molecular weight does not decrease, and a product with a relatively high molecular weight can be produced.

[0105] The catalyst composition disclosed herein exists in a homogeneous form in a polymerization reactor, and is therefore suitable for solution polymerization processes carried out at temperatures above the melting point of the polymer. However, as disclosed in U.S. Patent No. 4,752,597, it can also be used in slurry polymerization or gas-phase polymerization processes in the form of a heterogeneous catalyst composition obtained by supporting the transition metal compound and cocatalyst on a porous metal oxide support.

[0106] Hereinafter, a novel transition metal compound according to one embodiment, a catalyst composition containing the same, and a method for producing an olefin polymer using the same will be specifically illustrated and explained using examples and experimental examples. However, the examples and experimental examples described below merely exemplify a part of one embodiment, and the technology described in this specification should not be construed as being limited thereto.

[0107] Unless otherwise stated, all synthetic experiments of transition metal compounds were carried out under a nitrogen atmosphere using standard Schlenk or glove box techniques, and organic solvents used in the reactions were refluxed under sodium metal and benzophenone to remove moisture and distilled immediately before use. 1 H-NMR analysis was carried out at room temperature using a Bruker 400 or 500 MHz.

[0108] The polymerization solvent, normal heptane, was passed through a tube filled with 5Å molecular sieves and activated alumina, and then bubbled with high-purity nitrogen to thoroughly remove moisture, oxygen, and other catalyst poisons before use. The polymerized polymer was analyzed by the methods described below.

[0109] 1. Melt Flow Index (MI) Measured at 190°C under a load of 2.16 kg using the ASTM D1238 analytical method.

[0110] 2. Density Measured according to ASTM D792 analytical method.

[0111] 3. Molecular weight and molecular weight distribution The measurement was carried out by gel chromatography using a three-stage mixed column.

[0112] The solvent used was 1,2,4-trichlorobenzene, and the measurement temperature was 120°C.

[0113] Example 1: Synthesis of Compound 1 JPEG2025533604000031.jpg70121 Under a nitrogen atmosphere, diphenylmethylidene(cyclopentadienyl)(9-fluorenyl)zirconium dichloride (S-PCI, 5.0 g, 8.9 mmol) and 3,6-di-tert-butylcarbazole (5.0 g, 18.0 mmol) were dissolved in 150 mL of toluene in a 500 mL round-bottom flask. At room temperature, 1.6 M butyllithium (11.8 mL, 18.9 mmol) was slowly added, and the temperature was raised to 80 °C and stirred for 12 hours. The solvent was removed under vacuum, and the concentrated solution was dissolved in 100 mL of methylcyclohexane. The solids were removed by filtration through a filter packed with dried Celite. The solvent was completely removed from the filtrate, yielding Compound 1 (8.30 g, 89.0% yield) as a red solid. 1 H NMR (500 MHz, Chloroform-d): δ= 8.38 (d, 2H), 8.01 (dd, 4H), 7.68 (m, 2H), 7.57 (m, 2H), 7.31 (m, 4H), 7.15 (d, 2H), 7.03 (t, 2H), 6.63 (m, 2H), 6.58 (d, 2H), 6.52 (d, 2H), 6.58 (d, 2H), 6.44 (m, 2H), 6.41 (d, 2H), 6.31 (m, 4H), 6.05 (m, 4H), 1.41 (s, 18H), 1.39 (s, 18H).

[0114] Example 2: Synthesis of Compound 2 JPEG2025533604000032.jpg84136 Under a nitrogen atmosphere, 9-fluorenyl-1-diphenylsilylcyclopentadienyl zirconium dichloride (TFC, 5.0 g, 8.7 mmol) and 3,6-bis(2-ethylhexyl)-9H-carbazole (6.8 g, 17.5 mmol) were dissolved in 150 mL of toluene in a 500 mL round-bottom flask. At room temperature, 1.6 M butyllithium (10.9 mL, 17.5 mmol) was slowly added, and the temperature was raised to 80 °C and stirred for 12 hours. The solvent was removed under vacuum, and the concentrated solution was dissolved in 100 mL of methylcyclohexane and filtered through a filter packed with dried Celite to remove solids. The solvent was completely removed from the filtrate, yielding Compound 2 (10.4 g, 92.5% yield) as a red solid. 1 H NMR (500 MHz, Chloroform-d): δ= 8.15 (d, 2H), 7.87 (m, 4H), 7.52 (m, 10H), 7.18 (m, 6H), 6.65 (m, 10H), 6.15 (m, 2H), 2.58 (m, 8H), 1.67 (m, 4H), 1.29 (m, 44H), 0.88 (m, 12H).

[0115] <Comparative Example 1> JPEG2025533604000033.jpg5450 The compound diphenylmethylidene(cyclopentadienyl)(9-fluorenyl)zirconium dichloride was purchased and prepared from S-PCI.

[0116] <Comparative Example 2> JPEG2025533604000034.jpg55130 Under a nitrogen atmosphere, diphenylmethylidene(cyclopentadienyl)(9-fluorenyl)zirconium dichloride (S-PCI, 10.0 g, 18.0 mmol) was dissolved in 100 mL of toluene in a 250 mL round-bottom flask. After cooling to -15°C, 1.5 M methyllithium (24.0 mL, 35.9 mmol) was slowly added. The temperature was then raised to room temperature and stirred for 3 hours. The solids were then removed by filtration through a filter packed with dried Celite. After filtration, the solvent in the filtrate was completely removed to obtain the yellow compound of Comparative Example 2 (8.5 g, 91.4% yield). 1 H NMR (500 MHz, Chloroform-d): δ= 8.20 (d, 2H), 7.85 (dd, 4H), 7.41 (m, 4H), 7.28 (m, 4H), 6.89 (m, 2H), 6.28 (m, 4H), 5.54 (m, 2H), -1.69 (s, 6H).

[0117] <Comparative Example 3> Under a nitrogen atmosphere, diphenylmethylidene(cyclopentadienyl)(9-fluorenyl)zirconium dichloride (S-PCI, 10.0 g, 18.0 mmol) was dissolved in 100 mL of toluene in a 250 mL round-bottom flask. The mixture was cooled to -15°C, and 1.5 M methyllithium (24.0 mL, 35.9 mmol) was slowly added. The mixture was then warmed to room temperature and stirred for 3 hours. 3-Pentadecylphenol (5.48 g, 18.0 mmol) was added while vigorously stirring the reaction mixture. The mixture was then stirred at 60°C for 3 hours, after which the solvent was removed under vacuum. The concentrated solution was dissolved in 200 mL of n-hexane and filtered through a filter packed with dried Celite to remove solids. The solvent was completely removed from the filtrate to obtain a yellow compound of Comparative Example 3 (18.7 g, yield 95.4%). 1H NMR (CDCl3, 500 MHz): δ= 8.16 (d, 1H), 8.10 (d, 1H), 7.95 (d, 1H), 7.88 (d, 2H), 7.78 (d, 1H), 7.39 (m, 2H), 7.30 (m, 2H), 7.25 (m, 3H), 7.08 (m, 2H), 6.92 (t, 1H), 6.78 (t, 1H), 6.65 (d, 1H), 6.41 (d, 1H), 6.29 (d, 1H), 6.24 (d, 1H), 6.05 (d, 1H), 5.79 (m, 2H), 5.60 (dd, 2H), 2.65 (t, 2H), 1.63 (m, 2H), 1.30 (m, 24H), 0.88 (m, 3H), -1.35 (s, 3H).

[0118] <Experimental Example 1> Solubility measurement The following experiment was conducted to compare the solubility of the transition metal compounds prepared in the examples and comparative examples in solvents. Specifically, 2 g of each transition metal compound prepared in the examples and comparative examples was dissolved in 2 g of each of the solvents listed in the table below (toluene, methylcyclohexane, n-hexane) at 25°C in a nitrogen atmosphere to prepare a saturated solution, and solids were removed using a 0.45 μm filter. Next, all of the solvent was removed, and the weight of the remaining transition metal compound was measured. The solubility of the transition metal compound was calculated and shown in Table 1 below. If the transition metal compound was not dissolved in the solvent (insoluble), it was marked with "-".

[0119] [Table 1]

[0120] As shown in Table 1, the transition metal compounds prepared in the examples have significantly higher solubility in hydrocarbon solvents than the transition metal compounds of Comparative Examples 1 to 3, and in particular, they exhibit surprisingly improved solubility in non-aromatic hydrocarbon solvents.

[0121] <Examples 3 and 4> Copolymerization of ethylene and 1-octene by continuous solution polymerization process Copolymerization of ethylene and 1-octene was carried out using a continuous polymerization apparatus as follows. The catalysts synthesized in Examples 1 and 2 were used as single-active-site catalysts, respectively. Heptane was used as the solvent. The catalyst amounts and other reaction conditions are as shown in Table 2 below. In Table 2 below, Zr represents the catalyst, and Al represents the number of moles of modified methylaluminoxane (20 wt %, Nouryon heptane solution). The catalyst was dissolved in toluene at a concentration of 0.1 g / L and injected.

[0122] The polymerization results, including the reactor conversion rate, the polymer melt flow index, and the density, are shown in Table 3. The conversion rate was calculated from the reaction conditions and the temperature gradient in the reactor, and the molecular weight was controlled as a function of the reactor temperature and the 1-octene content.

[0123] <Comparative Example 4> Copolymerization was carried out in the same manner as in Examples 3 and 4, except that the transition metal compound of Comparative Example 3 was used as the catalyst.

[0124] [Table 2] (In Table 2, the "ethylene input amount" is expressed as a weight percentage relative to the "total solution flow rate.")

[0125] [Table 3]

[0126] As shown in Table 3, when copolymerization was performed using the transition metal compounds according to the Examples as catalysts, the MI was lower than when the transition metal compounds according to the Comparative Examples were used as catalysts, and polymers with excellent physical properties and high molecular weights were easily produced. Therefore, the transition metal compound according to one embodiment significantly increases its solubility in non-aromatic hydrocarbon solvents by introducing a carbazole substituent at a specific position, thereby maintaining and improving the activity of the catalyst, which allows for the production of polymers with excellent physical properties, and facilitating the production of olefin polymers by solution processing. Therefore, its use can bring about economic savings in industrial processes. While one embodiment has been described in detail above with reference to examples and experimental examples, the scope of one embodiment is not limited to the specific embodiments and should be construed in accordance with the appended claims.

Claims

1. A transition metal compound represented by the following chemical formula 1A. [Chemical formula 1A] (In the above Chemical Formula 1A, M is a transition metal of Group 4 of the periodic table; A is carbon or silicon; Cp １ and Cp ２ are each independently cyclopentadienyl, indenyl, or fluorenyl, and the cyclopentadienyl, indenyl, and fluorenyl may be substituted with one or more selected from the group consisting of (C1-C20) alkyl, (C2-C20) alkenyl, (C1-C20) alkoxy, (C1-C20) alkoxy(C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, and (C6-C20) arylsilyl; B １ and B ２ are each independently (C1-C20)alkyl, (C2-C20)alkenyl, (C1-C20)alkoxy, (C1-C20)alkoxy(C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C20)aryl, (C6-C20)aryl(C1-C20)alkyl, (C1-C20)alkyl(C6-C20)aryl, (C1-C20)alkylsilyl, or (C6-C20)arylsilyl; and X's are each independently represented by the following chemical formula 2A: [Chemical formula 2A] In the chemical formula 2A, R １５ ~R ２２ are each independently hydrogen, (C1-C30) alkyl, (C1-C30) alkylsilyl, (C1-C30) alkoxy, (C3-C30) cycloalkyl, (C6-C30) aryl, (C6-C30) aryl(C1-C30) alkyl, or (C1-C30) alkyl(C6-C30) aryl, and １５ ~R ２２ The alkyl, alkylsilyl, alkoxy, cycloalkyl, aryl, arylalkyl, and alkylaryl in R may be substituted with one or more selected from the group consisting of halogen, (C1-C10) alkyl, (C1-C10) alkylamino, (C1-C10) alkoxy, and (C1-C10) alkylsilyl, or １５ ~R ２２ adjacent substituents may be linked by a (C3-C12) alkylene or (C3-C12) alkenylene, which may or may not contain a fused ring, to form an alicyclic ring or an aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C20) alkyl, (C1-C20) alkoxy, (C1-C20) alkoxy(C1-C20) alkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, and (C6-C20) arylsilyl.

2. The R １５ ~R ２２ are each independently hydrogen, (C1-C20) alkyl, (C1-C20) alkylsilyl, (C1-C20) alkoxy, (C3-C20) cycloalkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, or (C1-C20) alkyl(C6-C20) aryl, and R １５ ~R ２２ The alkyl, alkylsilyl, alkoxy, cycloalkyl, aryl, arylalkyl, and alkylaryl in R may be substituted with one or more selected from the group consisting of halogen, (C1-10) alkyl, (C1-C10) alkylamino, (C1-C10) alkoxy, and (C1-C10) alkylsilyl, or １５ ~R ２２ may be connected by a (C3-C12) alkylene or (C3-C12) alkenylene, with or without a fused ring, adjacent substituents to form an alicyclic ring or an aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C10) alkyl, (C1-C10) alkoxy, (C1-C10) alkoxy(C1-C10) alkyl, (C6-C10) aryl, (C6-C10) aryl(C1-C10) alkyl, (C1-C10) alkyl(C6-C10) aryl, (C1-C10) alkylsilyl, and (C6-C10) arylsilyl.

3. 2. The transition metal compound according to claim 1, which is represented by the following chemical formula 1B: [Chemical formula 1B] (In the above Chemical Formula 1B, M is a transition metal of Group 4 of the periodic table; A is carbon or silicon; R １ ~R ４ are each independently hydrogen or (C1-C20) alkyl; R ５ ~R １２ are each independently hydrogen, (C1-C20) alkyl, (C1-C20) alkoxy, (C3-C20) cycloalkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, or (C6-C20) arylsilyl; ５ ~R １２ adjacent substituents may be connected by a (C3-C12) alkylene or (C3-C12) alkenylene, which may or may not contain a fused ring, to form an alicyclic ring or an aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C10) alkyl, (C1-C10) alkoxy, (C1-C10) alkoxy(C1-C10) alkyl, (C6-C10) aryl, (C6-C10) aryl(C1-C10) alkyl, (C1-C10) alkyl(C6-C10) aryl, (C1-C10) alkylsilyl, and (C6-C10) arylsilyl; and R １３ and R １４ are each independently (C6-C20)aryl.

4. The R １ ~R ４ are each independently hydrogen or (C1-C10) alkyl; The R ５ ~R １２ are each independently hydrogen, (C1-C10) alkyl, (C1-C10) alkoxy, (C3-C10) cycloalkyl, (C6-C10) aryl, (C6-C10) aryl(C1-C10) alkyl, (C1-C10) alkyl(C6-C10) aryl, (C1-C10) alkylsilyl, or (C6-C10) arylsilyl; ５ ~R １２ adjacent substituents may be connected by a (C3-C12) alkylene or (C3-C12) alkenylene, which may or may not contain a fused ring, to form an alicyclic ring or an aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C10) alkyl, (C1-C10) alkoxy, (C1-C10) alkoxy(C1-C10) alkyl, (C6-C10) aryl, (C6-C10) aryl(C1-C10) alkyl, (C1-C10) alkyl(C6-C10) aryl, (C1-C10) alkylsilyl, and (C6-C10) arylsilyl; and The R １３ and R １４ is each independently (C6-C10)aryl.

5. M is Ti, Zr, or Hf; A is carbon or silicon, The R １ ~R ４ are each independently hydrogen or (C1-C4) alkyl; The R ５ ~R １２ are each independently hydrogen, (C1-C4) alkyl, or (C1-C4) alkoxy, and The R １３ and R １４ is each independently (C6-C10)aryl.

6. 2. The transition metal compound according to claim 1, which is represented by the following chemical formula 1C: [Chemical formula 1C] (In the above Chemical Formula 1C, M is Ti, Zr, or Hf; A is carbon or silicon; R １ ~R ４ are each independently hydrogen or (C1-C20) alkyl, and R １３ and R １４ are each independently (C6-C10)aryl.

7. 2. The transition metal compound according to claim 1, which is any one selected from the group consisting of the following compounds:

8. The transition metal compound according to claim 1 , wherein the compound represented by Chemical Formula 2A is any one selected from the following compound group:

9. or 2. The transition metal compound according to claim 1, wherein

10. 2. The transition metal compound according to claim 1, which has a solubility in a hydrocarbon solvent at 25° C. of 5% by weight or more.

11. a transition metal compound represented by the following chemical formula 1A; and a cocatalyst. [Chemical formula 1A] (In the above Chemical Formula 1A, M is a transition metal of Group 4 of the periodic table; A is carbon or silicon; Cp １ and Cp ２ are each independently cyclopentadienyl, indenyl, or fluorenyl, and the cyclopentadienyl, indenyl, and fluorenyl may be substituted with one or more selected from the group consisting of (C1-C20) alkyl, (C2-C20) alkenyl, (C1-C20) alkoxy, (C1-C20) alkoxy(C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, and (C6-C20) arylsilyl; B １ and B ２ are each independently (C1-C20)alkyl, (C2-C20)alkenyl, (C1-C20)alkoxy, (C1-C20)alkoxy(C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C20)aryl, (C6-C20)aryl(C1-C20)alkyl, (C1-C20)alkyl(C6-C20)aryl, (C1-C20)alkylsilyl, or (C6-C20)arylsilyl; and X's are each independently represented by the following chemical formula 2A: [Chemical formula 2A] In the chemical formula 2A, R １５ ~R ２２ are each independently hydrogen, (C1-C30) alkyl, (C1-C30) alkylsilyl, (C1-C30) alkoxy, (C3-C30) cycloalkyl, (C6-C30) aryl, (C6-C30) aryl(C1-C30) alkyl, or (C1-C30) alkyl(C6-C30) aryl, and １５ ~R ２２ The alkyl, alkylsilyl, alkoxy, cycloalkyl, aryl, arylalkyl, and alkylaryl in R may be substituted with one or more selected from the group consisting of halogen, (C1-10) alkyl, (C1-10) alkylamino, (C1-C10) alkoxy, and (C1-C10) alkylsilyl, or １５ ~R ２２ adjacent substituents may be linked by a (C3-C12) alkylene or (C3-C12) alkenylene, which may or may not contain a fused ring, to form an alicyclic ring or an aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C20) alkyl, (C1-C20) alkoxy, (C1-C20) alkoxy(C1-C20) alkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, and (C6-C20) arylsilyl.

12. 12. The transition metal catalyst composition for producing an olefin polymer according to claim 11, wherein the co-catalyst comprises at least one selected from the group consisting of aluminum compounds, boron compounds, and mixtures thereof.

13. 12. The transition metal catalyst composition for producing an olefin polymer according to claim 11, wherein the olefin polymer is an ethylene homopolymer or a copolymer of ethylene and an α-olefin.

14. A method for producing an olefin polymer, comprising the step of solution polymerizing an olefin monomer in the presence of a transition metal compound represented by the following chemical formula 1A, a cocatalyst, and a hydrocarbon solvent to obtain an olefin polymer. [Chemical formula 1A] (In the above Chemical Formula 1A, M is a transition metal of Group 4 of the periodic table; A is carbon or silicon; Cp １ and Cp ２ are each independently cyclopentadienyl, indenyl, or fluorenyl, and the cyclopentadienyl, indenyl, and fluorenyl may be substituted with one or more selected from the group consisting of (C1-C20) alkyl, (C2-C20) alkenyl, (C1-C20) alkoxy, (C1-C20) alkoxy(C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, and (C6-C20) arylsilyl; B １ and B ２ are each independently (C1-C20)alkyl, (C2-C20)alkenyl, (C1-C20)alkoxy, (C1-C20)alkoxy(C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C20)aryl, (C6-C20)aryl(C1-C20)alkyl, (C1-C20)alkyl(C6-C20)aryl, (C1-C20)alkylsilyl, or (C6-C20)arylsilyl; and X's are each independently represented by the following chemical formula 2A: [Chemical formula 2A] In the chemical formula 2A, R １５ ~R ２２ are each independently hydrogen, (C1-C30) alkyl, (C1-C30) alkylsilyl, (C1-C30) alkoxy, (C3-C30) cycloalkyl, (C6-C30) aryl, (C6-C30) aryl(C1-C30) alkyl, or (C1-C30) alkyl(C6-C30) aryl, and １５ ~R ２２ The alkyl, alkylsilyl, alkoxy, cycloalkyl, aryl, arylalkyl, and alkylaryl in R may be substituted with one or more selected from the group consisting of halogen, (C1-10) alkyl, (C1-10) alkylamino, (C1-C10) alkoxy, and (C1-C10) alkylsilyl, or １５ ~R ２２ adjacent substituents may be linked by a (C3-C12) alkylene or (C3-C12) alkenylene, which may or may not contain a fused ring, to form an alicyclic ring or an aromatic ring, and the alicyclic ring and aromatic ring may be substituted with any one or more selected from the group consisting of (C1-C20) alkyl, (C1-C20) alkoxy, (C1-C20) alkoxy(C1-C20) alkyl, (C6-C20) aryl, (C6-C20) aryl(C1-C20) alkyl, (C1-C20) alkyl(C6-C20) aryl, (C1-C20) alkylsilyl, and (C6-C20) arylsilyl.

15. The hydrocarbon solvent is one or more non-aromatic hydrocarbon solvents selected from the group consisting of methylcyclohexane, cyclohexane, n-heptane, n-hexane, n-butane, isobutane, n-pentane, n-octane, isooctane, nonane, decane, and dodecane, or The method for producing an olefin polymer according to claim 14, wherein the aromatic hydrocarbon solvent is one or more selected from the group consisting of toluene, benzene, ethylbenzene, xylene, naphthalene, methylnaphthalene, anthracene, acenaphthene, and phenanthrene.

16. The method for producing an olefin polymer according to claim 14, wherein the solubility of the transition metal compound in the hydrocarbon solvent at 25°C is 5% by weight or more.

17. The process for producing an olefin polymer according to claim 14, wherein the cocatalyst is selected from an aluminum compound, a boron compound, or a mixture thereof.

18. The method for producing an olefin polymer according to claim 17, wherein the boron compound is selected from the compounds represented by the following Chemical Formulas 3A to 3D: [Chemical formula 3A] B(R ２３ ) ３ [Chemical formula 3B] [R ２４ ] ＋ [B(R ２３ ) ４ ] － [Chemical formula 3C] [R ２５ ｐ ZH] ＋ [R ２３ ４ ] － [Chemical formula 3D] (In the above Chemical Formulas 3A to 3D, B is boron; R ２３ each independently represents a phenyl unsubstituted or substituted with one or more substituents selected from the group consisting of fluorine, (C1-C20) alkyl, fluorine-substituted (C1-C20) alkyl, (C1-C20) alkoxy, and fluorine-substituted (C1-C20) alkoxy; R ２４ is a (C5-C7) aromatic radical, a (C1-C20) alkyl (C6-C20) aryl radical, or a (C6-C20) aryl (C1-C20) alkyl radical; Z is nitrogen or phosphorus; R ２５ are each independently a (C1-20) alkyl radical or a (C1-C10) alkyl disubstituted anilinium radical; R ２６ is (C5-C20) alkyl, R ２７ is (C5-C20)aryl or (C1-20)alkyl(C5-C20)aryl, and p is 2 or 3.

19. The method for producing an olefin polymer according to claim 17, wherein the aluminum compound is selected from the compounds represented by the following Chemical Formulas 4A to 4E: [Chemical formula 4A] (-A-R ２８ -O-) ｍ [Chemical formula 4B] (R ２９ ) ２ Al-(-OR ２９ -) ｑ (-O-)Al(R ２９ ) ２ [Chemical formula 4C] () ３０ ) ｒ b?()) ３－ｒ [Chemical formula 4D] (R) ３１ ) ２ Allｯｲ ３２ [Chemical formula 4E] R ３１ Al(OR ３２ ) ２ (In the chemical formulas 4A to 4E, R ２８ and R ２９ are each independently (C1-C20) alkyl; m and q are each independently an integer of 5 to 20; R ３０ and R ３１ are each independently (C1-C20) alkyl; E is hydrogen or halogen; r is an integer from 1 to 3, and R ３２ is (C1-C20) alkyl or (C6-C30) aryl.

20. The method for producing an olefin polymer according to claim 14, wherein the solution polymerization is carried out at a temperature of 100°C to 200°C.

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