Ethylene alpha olefin polymer formed by use of metallocene catalyst

1. A method for producing copolymer of ethylene, propylene, and styrene comprising: a solution polymerizing ethylene, propylene, and styrene under presence of C3 to C20 organic solvent and a catalyst composition including a transition metal catalyst represented by the following Formula 1 in a single reactor, or series or parallel 2nd continuous reactors:

where,

M is a group IV transition metal in a periodic table;

Cp is a cyclopentadienyl ring, or a cyclopentadienyl containing fused ring that can form an η 5 -bond along with a central metal M, and the cyclopentadienyl ring or the cyclopentadienyl containing fused ring is optionally further substituted with at least one selected from the group consisting of (C1-C20) alkyl, (C6-C30) aryl, (C2-C20) alkenyl and (C6-C30) ar (C1-C20) alkyl;

R 1 to R 4 and R 22 and R 23 are each independently hydrogen atom, (C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C30) aryl, (C6-C30) ar (C1- C10) alkyl, (C1-C20) alkoxy, (C3-C20) alkylsiloxy, (C6-C30) arylsiloxy, (C1-C20) alkylamino, (C6-C30) arylamino, (C1-C20) alkylthio, (C6-C30) arylthio or nitro, or the adjacent R 1 to R 4 optionally form an aliphatic ring, and monocyclic or polycyclic aromatic ring;

X 1 and X 2 are each independently halogen atom, (C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C30) ar (C1-C20) alkyl, (C1-C20) alkoxy, (C3-C20) alkylsiloxy, (C6-C30) arylsiloxy, (C1-C20) alkylamino, (C6-C30) arylamino, (C1-C20) alkylthio, (C6-C30) artylthio, or

R 11 to R 15 are each independently hydrogen atom, halogen atom, (C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C30) aryl, (C6-C30) ar (C1-C10) alkyl, (C1-C20) alkoxy, (C3-C20) alkylsiloxy, (C6-C30) arylsiloxy, (C1-C20) alkylamino, (C6-C30) arylamino, (C1-C20) alkylthio, (C6-C30) arylthio or nitro, or the adjacent R 11 to R 15 optionally form an aliphatic ring, and monocyclic or polycyclic aromatic ring; and

alkyl, aryl, cycloalkyl, aralkyl, alkoxy, alkylsiloxy, arylsiloxy, alkylamino, arylamino, alkylthio, arylthio of the R 1 to R 4 , R 11 to R 15 , R 22 and R 23 , and X 1 and X 2 ; the rings optionally formed by binding adjacent R 1 to R 4 or adjacent R 11 to R 15 are optionally further substituted with at least one selected from the group consisting of halogen atom, (C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C30) aryl, (C6-C30) ar (C1-C10) alkyl, (C1-C20) alkoxy, (C3-C20) alkylsiloxy, (C6-C30) arylsiloxy, (C1-C20) alkylamino, (C6-C30) arylamino, (C1-C20) alkylthio, (C6-C30) arylthio, nitro and hydroxy.

2. The method according to claim 1 , wherein M in the transition metal catalyst represented by the above Formula 1 is Ti, Zr or Hf.

3. The method according to claim 1 , wherein the transition metal catalyst is selected from the group consisting of the following Formulae:

where

R 21 to R 26 are each independently hydrogen atom, halogen atom, (C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C30) aryl, (C6-C30) ar (C1-C10) alkyl, (C1-C20) alkoxy, (C3-C20) alkylsiloxy, (C6-C30) arylsiloxy, (C1-C20) alkylamino, (C6-C30) arylamino, (C1-C20) alkylthio, (C6-C30) arylthio or nitro, or the adjacent R 21 to R 26 optionally form an aliphatic ring, and monocyclic or polycyclic aromatic ring; alkyl, aryl, cycloalkyl, aralkyl, alkoxy, alkylsiloxy, arylsiloxy, alkylamino, arylamino, alkylthio, arylthio of the R 21 to R 26 are optionally further substituted with at least one selected from the group consisting of halogen atom, (C1-C20) alkyl, (C3-C20) cycloalkyl, (C6-C30) aryl, (C6-C30) ar (C1- C10) alkyl, (C1-C20) alkoxy, (C3-C20) alkylsiloxy, (C6-C30) arylsiloxy, (C1-C20) alkylamino, (C6-C30) arylamino, (C1-C20) alkylthio, (C6-C30) arylthio, nitro and hydroxy;

Cp is a cyclopentadienyl ring, or a cyclopentadienyl containing fused ring that can form an η 5 -bond along with a central metal, Ti, and the cyclopentadienyl ring or the cyclopentadienyl containing fused ring is optionally further substituted with at least one selected from the group consisting of (C1-C20) alkyl, (C6-C30) aryl, (C2-C20) alkenyl and (C6-C30) ar (C1-C20) alkyl; and

X 1 and X 2 are methyl or Cl.

4. The method according to claim 1 , wherein the transition metal catalyst is selected from the group consisting of the following Formulae:

where

Cp is a cyclopentadienyl ring, or a cyclopentadienyl containing fused ring that can form an η 5 -bond along with a central metal, M, and the cyclopentadienyl ring or the cyclopentadienyl containing fused ring is optionally further substituted with at least one selected from the group consisting of (C1-C20) alkyl, (C6-C30) aryl, (C2-C20) alkenyl and (C6-C30) ar (C1-C20) alkyl; and

X 1 and X 2 are methyl or Cl.

5. The method according to claim 1 , wherein the transition metal catalyst is at least one selected from the group consisting of (dichloro)(pentamethylcyclopentadienyl)(2-(9,9′-dimethylfluorene-2′-yl)phenoxy)titanium(IV) and (chloro)(pentamethylcyclopentadienyl)(bis(2-(9,9′-dimethylfluorene-2′-yl)phenoxy))titanium(IV).

6. The method according to claim 1 , wherein the pressure of the reaction is 1 to 500 atm and the temperature of the polymerization is 30 to 300° C.

7. The method according to claim 1 , wherein the catalyst composition includes the transition metal catalyst; and a cocatalyst selected from the group consisting of aluminoxane compound, alkylaluminum compound, boron compound, and the combination thereof.

8. The method according to claim 7 , wherein the ratio of the transition metal catalyst and the cocatalyst is 1:0.1 to 50:1 to 1000 based on the mole ratio of transition metal M:boron atom:aluminum atom.

9. The method according to claim 1 , wherein the organic solvent is at least one selected from the group consisting of butane, isobutane, pentane, hexane, heptane, octane, isooctane, nonane, decane, dodecane, cyclohexane, methylcyclohexane, benzene, toluene and xylene.

10. The method according to claim 1 , wherein the copolymer of ethylene, propylene, and styrene has 60,000 to 600,000 of a weight average molecular weight and 1.0 to 5.0 of a molecular weight distribution Mw/Mn.