KR20100114370A - Novel transition metal compound and method for preparing olefin-based polymers - Google Patents

Abstract

PURPOSE: A novel transition metal compound and a method for manufacturing olefin polymers using the same are provided to ensure excellent reactivity to olefin monomers with three-dimensional problem. CONSTITUTION: A transition metal compound is denoted by chemical formula 1. The transition metal compound of chemical formula 1 is a compound of chemical formula 2 or 3. A catalyst composition contains the transition metal compound of chemical formula 1 and co-catalyst compound of chemical formula 4, 5, or 6. An olefin polymer is prepared by polymerizing olefin monomer under the presence of catalyst composition. The olefin monomer is ethylene, alpha-olefin, cyclic olefin, diene olefin, or triene olefin.

Description

Novel transition metal compound and method for preparing olefin polymer using the same {NOVEL TRANSITION METAL COMPOUND AND METHOD FOR PREPARING OLEFIN-BASED POLYMERS}

The present invention relates to a novel transition metal compound and a method for producing an olefin polymer using the same.

Metallocene catalysts for olefin polymerization have been developed for a long time. Metallocene compounds are generally used by activation with aluminoxanes, boranes, borates or other activators. For example, a metallocene compound having a ligand including a cyclopentadienyl group and two sigma chloride ligands uses aluminoxane as an activator. When the chloride group of such a metallocene compound is substituted with another ligand (eg, benzyl or trimethylsilylmethyl group (—CH ₂ SiMe ₃ )), an example showing an effect such as increased catalytic activity has been reported.

EP 1462464 contains examples of polymerization using hafnium metallocene compounds having chloride, benzyl, trimethylsilylmethyl groups. It has also been reported that the production energy of activated species varies depending on the alkyl ligand bound to the central metal (J. Am. Chem. Soc. 2000, 122, 10358). A catalyst for olefin polymerization having a quinoline-based ligand has been reported (KR 0,820,542 B1), and this patent relates to a catalyst having a living group containing silicon and germanium atoms other than a methyl group.

An object of the present invention is to provide a novel transition metal compound, a catalyst composition comprising the same and a method for producing an olefin polymer using the same.

The present invention provides novel transition metal compounds.

The present invention provides a catalyst composition comprising the novel transition metal compound and a cocatalyst compound.

The present invention provides a method for producing an olefinic polymer comprising the step of polymerizing an olefinic monomer in the presence of the catalyst composition.

When the novel transition metal compound according to the present invention is used as a catalyst for producing an olefinic polymer, an olefinic polymer having a low density and a high molecular weight having excellent reactivity with respect to an olefinic monomer having high copolymerization activity and steric hindrance is produced. can do.

The novel transition metal compound according to the present invention is characterized by the following formula (1):

In Chemical Formula 1,

R1 to R4 are each independently hydrogen, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkenyl having 1 to 20 carbon atoms, alkylaryl having 7 to 20 carbon atoms, arylalkyl having 7 to 20 carbon atoms, and hydrocarbyl; Selected from the metalloid radicals of the Group 14 metals substituted with two or more of R1 to R4 are connected to each other by an alkylidine including alkyl having 1 to 20 carbon atoms or aryl having 6 to 20 carbon atoms to form an aliphatic or aromatic ring. Can be formed,

R5 to R7 are each independently selected from the group consisting of hydrogen, a halogen radical, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, aryloxy having 6 to 20 carbon atoms, and amido, Two or more of R5 to R7 may be connected to each other to form an aliphatic or aromatic ring,

CY1 is a substituted or unsubstituted aliphatic or aromatic ring,

M is a Group 4 transition metal and includes, for example, Ti, Zr and Hf,

Q1 and Q2 are each independently a tri (hydrocarbyl) silylhydrocarbyl group or a tri (hydrocarbyl) gerylhydrocarbyl group;

Q1 and Q2 can be linked to each other to form a divalent ligand of the form-(ER) _n- ;

Wherein n is 1 to 8, and when n is 2 or more, at least one of the two or more E is silicon or germanium, and the rest is silicon, germanium, or carbon,

Each R is independently selected from hydrogen, silyl, hydrocarbyl and hydrocarbyloxy.

The tri (hydrocarbyl) silyl hydrocarbyl group or tri (hydrocarbyl) gerylhydrocarbyl group preferably contains trimethylsilylmethyl, trimethylgerylmethyl and the like.

The transition metal compound represented by Formula 1 is preferably a compound represented by the following Formula 2 or Formula 3:

In Chemical Formula 2 and Chemical Formula 3,

R1 to R4 are each independently hydrogen, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkenyl having 1 to 20 carbon atoms, alkylaryl having 7 to 20 carbon atoms, arylalkyl having 7 to 20 carbon atoms, and hydrocarbyl; Selected from the metalloid radicals of the Group 14 metals substituted with two or more of R1 to R4 are connected to each other by an alkylidine including alkyl having 1 to 20 carbon atoms or aryl having 6 to 20 carbon atoms to form an aliphatic or aromatic ring. Can be formed,

R5 to R17 are each independently selected from the group consisting of hydrogen, a halogen radical, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, aryloxy having 6 to 20 carbon atoms, and amido, Two or more of R5 to R7 may be connected to each other to form an aliphatic or aromatic ring,

M is a Group 4 transition metal and includes, for example, Ti, Zr and Hf,

Q1 and Q2 are each independently a tri (hydrocarbyl) silylhydrocarbyl group or a tri (hydrocarbyl) gerylhydrocarbyl group;

Q1 and Q2 can be linked to each other to form a divalent ligand of the form-(ER) _n- ;

Wherein n is 1 to 8, and when n is 2 or more, at least one of the two or more E is silicon or germanium, and the rest is silicon, germanium, or carbon,

Each R is independently selected from hydrogen, silyl, hydrocarbyl and hydrocarbyloxy.

In addition, the catalyst composition according to the present invention is characterized in that it comprises at least one cocatalyst compound selected from the group consisting of a transition metal compound represented by the formula (1), and a compound represented by the following formula (4), (5) and (6) do.

-[Al (R18) -O] a-

In Chemical Formula 4,

Each R 18 is independently a halogen radical; Or a hydrocarbyl radical having 1 to 20 carbon atoms which is unsubstituted or substituted with halogen,

a is an integer of 2 or more,

D (R19) ₃

In Formula 5,

D is aluminum or boron,

Each R 19 is independently a halogen radical; Or a hydrocarbyl radical having 1 to 20 carbon atoms unsubstituted or substituted with halogen;

_{^{[LH] + [ZA 4]}} - or _{^{[L] + [ZA 4]}} -

In Formula 6,

L is a neutral or cationic Lewis acid;

H is a hydrogen atom;

Z is a Group 13 element comprising B, Al, Ga, In and Tl;

A is each independently an aryl having 6 to 20 carbon atoms or an alkyl radical having 1 to 20 carbon atoms, in which at least one hydrogen atom is substituted with halogen, hydrocarbyl having 1 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, or a phenoxy radical.

Among the cocatalyst compounds, the compounds represented by Formulas 4 and 5 may be represented by alkylating agents, and the compounds represented by Formula 6 may be represented by activators.

The catalyst composition is present in an activated state by a reaction between the transition metal compound of Formula 1 and the cocatalysts, and is also referred to as an activated catalyst composition. However, since it is known in the art that the catalyst composition remains in an activated state, the term activated catalyst composition is not used separately herein.

The catalyst composition may be prepared by the following method for producing a composition.

Firstly contacting the transition metal compound of Formula 1 with the compound represented by Formula 4 or Formula 5 to obtain a mixture; And adding a compound represented by Chemical Formula 6 to the mixture.

Secondly, a method of preparing a catalyst composition is provided by contacting a transition metal compound of Formula 1 with a compound represented by Formula 4.

Thirdly, a method of preparing a catalyst composition is provided by contacting a transition metal compound of Formula 1 with a compound represented by Formula 5.

Hydrocarbon solvents such as pentane, hexane, heptane and the like, or aromatic solvents such as benzene and toluene may be used as the reaction solvent in the preparation of the catalyst composition, but are not limited thereto. Can be.

In addition, the transition metal compounds and cocatalyst compounds of Chemical Formula 1 may be used in a form supported on silica or alumina.

The compound represented by the formula (4) is not particularly limited as long as it is alkyl aluminoxane, preferred examples thereof include methyl aluminoxane, ethyl aluminoxane, isobutyl aluminoxane, butyl aluminoxane, and the like.

The compound represented by Chemical Formula 5 is not particularly limited, but preferred examples thereof include trimethylaluminum, triethylaluminum, triisobutylaluminum, tripropylaluminum, tributylaluminum, dimethylchloroaluminum, triisopropylaluminum, and tri-s-part. Trityl aluminum, tricyclopentyl aluminum, tripentyl aluminum, triisopentyl aluminum, trihexyl aluminum, trioctyl aluminum, ethyl dimethyl aluminum, methyl diethyl aluminum, triphenyl aluminum, tri-p-tolyl aluminum, dimethyl aluminum methoxide, Dimethylaluminum ethoxide, trimethylboron, triethylboron, triisobutylboron, tripropylboron, tributylboron and the like are particularly preferred. The compound is selected from trimethylaluminum, triethylaluminum and triisobutylaluminum.

Examples of the compound represented by Formula 6 include triethylammonium tetra (phenyl) boron, tributylammonium tetra (phenyl) boron, trimethylammonium tetra (phenyl) boron, tripropylammonium tetra (phenyl) boron, trimethyl Ammonium tetra (p-tolyl) boron, trimethylammonium tetra (o, p-dimethylphenyl) boron, tributylammonium tetra (p-trifluoromethylphenyl) boron, trimethylammonium tetra (p-trifluoromethylphenyl Boron, tributylammonium tetra (pentafluorophenyl) boron, N, N-diethylanilidedium tetra (phenyl) boron, N, N-diethylanilidedium tetra (phenyl) boron, N, N- Diethylanilidedium tetra (pentafluorophenyl) boron, diethyl ammonium tetra (pentafluorophenyl) boron, triphenyl phosphonium tetra (phenyl) boron, trimethyl phosphonium tetra (phenyl) boron, triethyl ammonium Tetra (phenyl) aluminum, tributyl ammonium tete (Phenyl) aluminum, trimethylammonium tetra (phenyl) aluminum, tripropylammonium tetra (phenyl) aluminum, trimethylammonium tetra (p-tolyl) aluminum, tripropylammonium tetra (p-tolyl) aluminum, triethylammonium Umtetra (o, p-dimethylphenyl) aluminum, tributylammoniumtetra (p-trifluoromethylphenyl) aluminum, trimethylammoniumtetra (p-trifluoromethylphenyl) aluminum, tributylammoniumtetra (pentafluoro Phenyl) aluminum, N, N-diethylanilinium tetra (phenyl) aluminum, N, N-diethylanilidedium tetra (phenyl) aluminum, N, N-diethylanilidedium tetra (pentafluorophenyl) Aluminum, diethyl ammonium tetra (pentafluorophenyl) aluminum, triphenyl phosphonium tetra (phenyl) aluminum, trimethyl phosphonium tetra (phenyl) aluminum, triethyl ammonium tetra (phenyl) aluminum, tributyl ammonium te Tri (phenyl) aluminum, tripropylammonium tetra (p-tolyl) boron, triethylammonium tetra (o, p-dimethylphenyl) boron, trimethylammonium tetra (o, p-dimethylphenyl) boron, tributylammonium Umtetra (p-trifluoromethylphenyl) boron, trimethylammoniumtetra (p-trifluoromethylphenyl) boron, tributylammoniumtetra (pentafluorophenyl) boron, N, N-diethylaniliniumtetra ( Phenyl) boron, N, N-diethylanilinium tetra (phenyl) boron, N, N-diethylanilinium tetra (pentafluorophenyl) boron, diethylammonium tetra (pentafluorophenyl) boron, Triphenylphosphonium tetra (phenyl) boron, triphenyl carbonium tetra (p-trifluoromethylphenyl) boron, triphenyl carbonium tetra (pentafluorophenyl) boron, trityl tetra (pentafluorophenyl) boron Etc.

In addition, the method for producing an olefin polymer according to the present invention is characterized in that it comprises the step of polymerizing the olefin monomer in the presence of the catalyst composition.

In the method for preparing an olefin polymer according to the present invention, the catalyst composition is a suitable aliphatic hydrocarbon solvent having 5 to 12 carbon atoms, such as pentane, hexane, heptane, nonane, decane, and isomers thereof and toluene, in a polymerization process. Aqueous solvents may be dissolved or diluted in aromatic hydrocarbon solvents such as benzene, hydrocarbon solvents substituted with chlorine atoms such as dichloromethane, and chlorobenzene. The solvent used herein is preferably used by removing a small amount of water or air that acts as a catalyst poison by treating a small amount of alkylaluminum, and may be carried out by further using a promoter.

The olefin monomers used for the polymerization using the catalyst composition described above include ethylene, alpha olefins, cyclic olefins, diene olefins, triene olefins, and the like. More specifically, ethylene, propylene, 1-butene, 1- Pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-undecene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-aitocene , Norbornene, norbornadiene, ethylidene norbornene, phenylnorbornene, vinyl norbornene, dicyclopentadiene, 1,4-butadiene, 1,5-pentadiene, 1,6-hexadiene, styrene, alpha- Methylstyrene, divinylbenzene, 3-chloromethylstyrene and the like. In particular, ethylene and C ₃ -C ₂₀ alphaolefins are preferable, and propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene More preferably one or more olefins selected from the group consisting of 1-undecene, 1-dodecene, 1-tetradecene, 1-hexadecene and 1-aitocene, and more preferably ethylene, propylene, 1-butene, 1-hexene And, most preferably, 4-methyl-1-pentene, and 1-octene. At this time, it is preferable to use n-hexane as a polymerization solvent.

As a polymerization process of the olefin polymer according to the present invention, a continuous solution process using the catalyst composition is most preferred. When the catalyst composition is used together with an inorganic carrier such as silica, the catalyst composition can be applied to a slurry or gas phase process.

As a result of copolymerization of ethylene and 1-octene using the Group 4 transition metal compound of Formula 1 according to the present invention, a low density copolymer was obtained. These results can be seen through the Examples and Comparative Examples to be described later. These results show that the copolymerization reactivity of the catalyst composition according to the present invention is relatively excellent in the case of sterically obstructed olefin monomers such as 1-octene. Through these results, the transition metal compound and the catalyst composition using the present invention are suitable for making a low density copolymer.

Hereinafter, the present invention will be described in more detail based on the following examples. These examples are provided to aid the understanding of the present invention, and the scope of the present invention is not limited thereto.

<Examples>

[Synthesis of Ligands and Transition Metal Compounds]

Organic reagents and solvents were purified using standard methods. At all stages of the synthesis, the contact between air and moisture was blocked to increase the reproducibility of the experiment. Spectra were obtained using a 400 MHz nuclear magnetic resonator (NMR) to demonstrate the structure of the compound.

Preparation Example 1 [bis ((trimethylsilyl) methyl)] [eta 5, eta 1: 1- (1,2,3,4-tetrahydroquinolin-8-yl) -2,3,4,5- Tramethylcyclopentadienyl] titanium (lV) compound

1,2,3,4-tetrahydroquinoline (1,2,3,4-tetrahydroquinoline, 957mg, 7.185mmol) was dissolved in THF (10ml) and stirred at -78 ° C for 30 minutes, then nBuLi (2.87ml, 7.185 mmol) was added to the syringe in a nitrogen atmosphere. After raising the temperature to room temperature and sufficiently stirring for 3 hours, the temperature was lowered to -78 ° C, and the reaction was performed by adding CO ₂ gas. After the temperature was raised to room temperature, the remaining CO ₂ gas was removed by stirring. Add tert-butyllithium (BuLi) (5.07 ml, 8.622 mmol) at -20 ° C, stir for 2 hours while keeping -20 ° C, and then remove 0.33M CeCl ₃ · 2LiCl solution (26.1ml, 8.622 mmol) and tetramethyl cyclopentenone (1.182 g, 8.622 mmol) were added under nitrogen. The solvent was removed after venting (venting) while slowly raising the temperature to room temperature, and extracted with water and ethyl acetate. The organic layer was separated to remove the solvent, and then column chromatography gave 8- (2,3,4,5-tetramethyl-1,3-cyclopentadienyl) -1,2,3,4-tetrahydroquinoline. Obtained (41%).

¹ H NMR (C ₆ D ₆ ): δ 1.00 (br d, 3H, Cp-CH ₃ ), 1.63-1.73 (m, 2H, quin-CH ₂ ), 1.80 (s, 3H, Cp-CH ₃ ), 1.81 (s, 3H, Cp-CH ₃ ), 1.85 (s, 3H, Cp-CH ₃ ), 2.64 (t, J = 6.0 Hz, 2H, quin-CH ₂ ), 2.84-2.90 (br, 2H, quin -CH ₂ ), 3.06 (br s, 1H, Cp-H), 3.76 (br s, 1H, NH), 6.77 (t, J = 7.2 Hz, 1H, quin-CH), 6.92 (d, J = 2.4 Hz, 1H, quin-CH), 6.94 (d, J = 2.4 Hz, 1H, quin-CH) ppm.

Dissolve 8- (2,3,4,5-tetramethyl-1,3-cyclopentadienyl) -1,2,3,4-tetrahydroquinoline (1 g, 3.95 mmol) prepared above in toluene- After the temperature was lowered to 20 ° C., n-butyllithium solution (3.2 mL, 2.5 M solution in hexane) was slowly added. After raising the temperature to room temperature, the mixture was stirred for 3 hours or more. After the temperature was lowered to −20 ° C., a (dimethoxyethane) titanium (lV) tetrachloride (1.10 g, 3.95 mmol) toluene solution in a slurry state was added thereto. After the temperature was raised to room temperature, the reaction was stirred for at least 12 hours. The solvent was removed under reduced pressure, hexane was added, the mixture was stirred, and then filtered. The filtered solid compound was washed with hexane and dried under reduced pressure to obtain [Eta 5, Eta 1: 1- (1,2,3,4-tetrahydroquinolin-8-yl) -2,3,4,5-tra Methylcyclopentadienyl] titanium (1V) dichloride compound was obtained.

¹ H NMR (C ₆ D ₆ ): δ 1.40 (m, 2H, quin-CH ₂ ), 1.78 (s, 6H, Cp-CH ₃ ), 2.03 (s, 6H, Cp-CH ₃ ), 2.15 (t , 2H, quin-CH ₂ ), 4.50 (m, 2H, quin-CH ₂ ), 6.80 (d, 1H, quin-CH), 6.91 (t, 1H, quin-CH), 6.97 (d, 1H, quin -CH) ppm.

[Eta 5, Eta 1: 1- (1,2,3,4-tetrahydroquinolin-8-yl) -2,3,4,5-tetramethylcyclopentadienyl] titanium (lV prepared above) ) (Trimethylsilyl) methyllithium solution (5.7 mL, 1.0 M solution in diethyl ether) was added to a solution of dichloride compound (1 g, 2.70 mmol) in toluene, followed by stirring at room temperature for 2 hours 30 minutes. The solvent was removed under reduced pressure and extracted with hexane. After the extracted solution was filtered through Celite, the solvent was removed under reduced pressure to obtain an orange compound.

¹ H NMR (C ₆ D ₆ ): δ 0.22 (s, 18H, CH ₂ SiMe ₃ -CH ₃ ), 0.71 (d, 2H, CH ₂ SiMe ₃ -CH ₂ ), 0.91 (d, 2H, CH ₂ SiMe ₃ -CH ₂ ), 1.70 (s, 6H, Cp-CH ₃ ), 1.77 (m, 2H, quin-CH ₂ ), 2.04 (s, 6H, Cp-CH ₃ ), 2.47 (t, 2H, quin- CH ₂ ), 4.55 (m, 2H, quin-CH ₂ ), 6.85 (t, 1H, quin-CH), 6.91 (d, 1H, quin-CH), 6.99 (d, 1H, quin-CH) ppm.

Example 1 Preparation of Ethylene and 1-Octene Copolymer

2L was added to hexane (1.0L) solvent and 1-octene (0.8M) to the autoclave reactor was preheated and the reactor temperature was 120 ℃. At the same time the pressure in the reactor was prefilled with ethylene (35 bar). 2 mL of the titanium compound prepared in Preparation Example 1 treated with triisobutylaluminum compound (5 × 10 ⁻⁴ M solution in hexane), dimethylanilinium tetrakis (pentafluorophenyl) borate (1 × 10 ⁻³ M in toluene Solution) 3 mL was placed in the reactor in turn under high pressure argon pressure. The polymerization was allowed to proceed for 8 minutes while continuously injecting ethylene to maintain the pressure in the reactor at 34 to 35 bar. The heat of reaction was controlled via a cooling coil inside the reactor to keep the polymerization temperature as constant as possible. After 8 minutes the remaining ethylene gas was drained off and the polymer solution was drained to the bottom of the reactor and added to excess ethanol and cooled to induce precipitation. After washing the obtained polymer with ethanol and acetone two to three times, and then dried in an 80 ^° C vacuum oven for at least 12 hours, the physical properties were measured.

The melt index (MI) of the polymer was measured by ASTM D-1238 (Condition E, 190 ^° C., 2.16 Kg load).

In addition, the density of the polymer was measured by preparing a sheet treated with an antioxidant (1,000 ppm) with a thickness of 3 mm and a radius of 2 cm using a 180 ^o C press mold and cooling to 10 ^o C / min. (Mettler) was measured on a balance.

Comparative Example 1 Preparation of Ethylene and 1-Octene Copolymer

Instead of the titanium compound prepared in Preparation Example 1, a dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamido) titanium (IV) dichloride compound purchased from Boulder Scientific, USA was used and the polymerization temperature was 120-. Ethylene and 1-octene copolymers were prepared in the same manner as in Example 1, except that the mixture was maintained at 160.8 ° C.

Comparative Example 2 Preparation of Ethylene and 1-Octene Copolymer

[Eta5, kappa-N: 1- (1,2,3,4-tetrahydroquinolin-8-yl) -2,3, described in Korean Patent Registration No. 820542 instead of the titanium compound prepared in Preparation Example 1. Ethylene and 1-octene air in the same manner as in Example 1, except that 4,5-tetramethylcyclopentadienyl] titanium (lV) dimethyl compound was used and the polymerization temperature was maintained at 120 to 129.5 ° C. The coalescence was prepared.

Physical properties of the olefin copolymers prepared from Example 1, Comparative Example 1 and Comparative Example 2 are shown in Table 1 below.

As shown in Table 1, it can be seen that the polyolefin according to Example 1 prepared using the catalyst composition containing the transition metal compound according to the present invention is lower in density and higher in molecular weight than Comparative Examples 1 and 2.

Claims (7)

A transition metal compound represented by Formula 1 below: [Formula 1]

In Chemical Formula 1, R1 to R4 are each independently hydrogen, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkenyl having 1 to 20 carbon atoms, alkylaryl having 7 to 20 carbon atoms, arylalkyl having 7 to 20 carbon atoms, and hydrocarbyl; Selected from the metalloid radicals of the Group 14 metals substituted with two or more of R1 to R4 are connected to each other by an alkylidine including alkyl having 1 to 20 carbon atoms or aryl having 6 to 20 carbon atoms to form an aliphatic or aromatic ring. Can be formed, R5 to R7 are each independently selected from the group consisting of hydrogen, a halogen radical, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, aryloxy having 6 to 20 carbon atoms, and amido, Two or more of R5 to R7 may be connected to each other to form an aliphatic or aromatic ring, CY1 is a substituted or unsubstituted aliphatic or aromatic ring, M is a Group 4 transition metal, Q1 and Q2 are each independently a tri (hydrocarbyl) silylhydrocarbyl group or a tri (hydrocarbyl) gerylhydrocarbyl group; Q1 and Q2 can be linked to each other to form a divalent ligand of the form-(ER) _n- ; Wherein n is 1 to 8, and when n is 2 or more, at least one of the two or more E is silicon or germanium, and the rest is silicon, germanium, or carbon, Each R is independently selected from hydrogen, silyl, hydrocarbyl and hydrocarbyloxy. The transition metal compound according to claim 1, wherein Q1 and Q2 of Chemical Formula 1 are trimethylsilylmethyl or trimethylgerylmethyl. The transition metal compound according to claim 1, wherein the transition metal compound represented by Formula 1 is a compound represented by Formula 2 or Formula 3 below: [Formula 2]

(3)

In Chemical Formula 2 and Chemical Formula 3, R1 to R4 are each independently hydrogen, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkenyl having 1 to 20 carbon atoms, alkylaryl having 7 to 20 carbon atoms, arylalkyl having 7 to 20 carbon atoms, and hydrocarbyl; Selected from the metalloid radicals of the Group 14 metals substituted with two or more of R1 to R4 are connected to each other by an alkylidine including alkyl having 1 to 20 carbon atoms or aryl having 6 to 20 carbon atoms to form an aliphatic or aromatic ring. Can be formed, R5 to R17 are each independently selected from the group consisting of hydrogen, a halogen radical, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, aryloxy having 6 to 20 carbon atoms, and amido, Two or more of R5 to R7 may be connected to each other to form an aliphatic or aromatic ring, M is a Group 4 transition metal and includes, for example, Ti, Zr and Hf, Q1 and Q2 are each independently a tri (hydrocarbyl) silylhydrocarbyl group or a tri (hydrocarbyl) gerylhydrocarbyl group, Q1 and Q2 can be linked to each other to form a divalent ligand of the form-(ER) _n- ; Wherein n is 1 to 8, and when n is 2 or more, at least one of the two or more E is silicon or germanium, and the rest is silicon, germanium, or carbon, Each R is independently selected from hydrogen, silyl, hydrocarbyl and hydrocarbyloxy. A catalyst composition comprising a transition metal compound represented by the following Chemical Formula 1, and at least one cocatalyst compound selected from the group consisting of compounds represented by the following Chemical Formulas 4, 5, and 6: [Formula 1]

In Chemical Formula 1, R1 to R4 are each independently hydrogen, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkenyl having 1 to 20 carbon atoms, alkylaryl having 7 to 20 carbon atoms, arylalkyl having 7 to 20 carbon atoms, and hydrocarbyl; Selected from the metalloid radicals of the Group 14 metals substituted with two or more of R1 to R4 are connected to each other by an alkylidine including alkyl having 1 to 20 carbon atoms or aryl having 6 to 20 carbon atoms to form an aliphatic or aromatic ring. Can be formed, R5 to R7 are each independently selected from the group consisting of hydrogen, a halogen radical, alkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, aryloxy having 6 to 20 carbon atoms, and amido, Two or more of R5 to R7 may be connected to each other to form an aliphatic or aromatic ring, CY1 is a substituted or unsubstituted aliphatic or aromatic ring, M is a Group 4 transition metal, Q1 and Q2 are each independently a tri (hydrocarbyl) silylhydrocarbyl group or a tri (hydrocarbyl) gerylhydrocarbyl group; Q1 and Q2 can be linked together to form a divalent ligand of the form-(ER) _n- , Wherein n is 1 to 8, and when n is 2 or more, at least one of the two or more E is silicon or germanium, and the rest is silicon, germanium, or carbon, Each R is independently selected from hydrogen, silyl, hydrocarbyl and hydrocarbyloxy; [Formula 4] -[Al (R18) -O] a- In Chemical Formula 4, Each R 18 is independently a halogen radical; Or a hydrocarbyl radical having 1 to 20 carbon atoms which is unsubstituted or substituted with halogen, a is an integer of 2 or more, [Chemical Formula 5] D (R19) ₃ In Formula 5, D is aluminum or boron, Each R 19 is independently a halogen radical; Or a hydrocarbyl radical having 1 to 20 carbon atoms unsubstituted or substituted with halogen; [Formula 6] _{^{[LH] + [ZA 4]}} - or _{^{[L] + [ZA 4]}} - In Formula 6, L is a neutral or cationic Lewis acid; H is a hydrogen atom; Z is a Group 13 element; A is each independently an aryl having 6 to 20 carbon atoms or an alkyl radical having 1 to 20 carbon atoms, in which at least one hydrogen atom is substituted with halogen, hydrocarbyl having 1 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, or a phenoxy radical. A process for producing an olefinic polymer comprising polymerizing an olefinic monomer in the presence of the catalyst composition of claim 4. The method of claim 5, wherein the olefin monomer comprises at least one selected from the group consisting of ethylene, alpha-olefin, cyclic olefin, diene olefin and triene olefin. Olefin-based polymer prepared from the process of claim 5.