Catalyst composition and method for preparing olefin polymer using same

Patent metadata

Field	Value
Publication number	US-11072670-B2
Application number	US-201816765352-A
Country	US
Kind code	B2
Filing date	Nov 28, 2018
Priority date	Dec 20, 2017
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A catalyst composition and a method for preparing an olefin polymer by using the same are provided herein. In some embodiments, a catalyst composition includes a transition metal compound having a compound (A) represented by Chemical Formula 1 and a compound (B) represented by Chemical Formula 2 present in a molar ratio of 1.6:1 to 18. The catalyst composition has high activity in an olefin polymerization reaction and can contribute to a reduction of catalyst cost. The catalyst composition aides in high copolymerizability of olefin monomers, and the produced olefin polymers can exhibit excellent processability and long-term physical properties, suitable for a pipe.

First claim

The invention claimed is:

1. A catalyst composition, comprising:
a transition metal compound having a compound (A) represented by the following Chemical Formula 1 and a compound (B) represented by the following Chemical Formula 2 present in a molar ratio of 1.6:1 to 18:1

wherein, in Chemical Formula 1,
M 1 is a Group 3 transition metal, a Group 4 transition metal, a Group 5 transition metal, a lanthanides transition metal or an actinides transition metal,
X 1 and X 2 are identical to or different from each other, and each independently, a halogen,
A is a Group 14 atom,
n′ is an integer between 1 and 20,
R 1 is alkyl having 1 to 20 carbon atoms, alkenyl having 2 to 20 carbon atoms, alkylaryl having 7 to 30 carbon atoms, arylalkyl having 7 to 30 carbon atoms, or aryl having 6 to 30 carbon atoms,
R 2 is hydrogen, alkyl having 1 to 20 carbon atoms, alkenyl having 2 to 20 carbon atoms, alkylaryl having 7 to 30 carbon atoms, arylalkyl having 7 to 30 carbon atoms, or aryl having 6 to 30 carbon atoms,
R 3 and R 5 are identical to or different from each other, and each independently, alkyl having 1 to 20 carbon atoms,
R 4 and R 6 are each independently alkyl aryl having 7 to 30 carbon atoms or aryl having 6 to 30 carbon atoms,
wherein R 3 , R 4 , R 5 and R 6 , R 3 and R 5 are different substituents from each other, or R 4 and

R 6 are different substituents from each other,
(Cp 21 R 21 ) n (Cp 22 R 22 )M 2 (X 2 ) 3-n   [Chemical Formula 2]

wherein, in Chemical Formula 2,
M 2 is a Group 4 transition metal;
Cp 21 and Cp 22 are identical to or different from each other, and each independently, any one selected from the group consisting of cyclopentadienyl, indenyl, 4,5,6,7-tetrahydro-1-indenyl, and fluorenyl radical, wherein Cp 21 and Cp 22 are optionally substituted with hydrocarbon having 1 to 20 carbon atoms;
R 21 and R 22 are identical to or different from each other, and each independently, hydrogen, alkyl having 1 to 20 carbon atoms, alkoxy having 1 to 10 carbon atoms, alkoxyalkyl having 2 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, aryloxy having 6 to 10 carbon atoms, alkenyl having 2 to 20 carbon atoms, alkylaryl having 7 to 40 carbon atoms, arylalkyl having 7 to 40 carbon atoms, arylalkenyl having 8 to 40 carbon atoms, or alkynyl having 2 to 10 carbon atoms;
X 2 is a halogen atom, alkyl having 1 to 20 carbon atoms, alkenyl having 2 to 10 carbon atoms, alkylaryl having 7 to 40 carbon atoms, arylalkyl having 7 to 40 carbon atoms, aryl having 6 to 20 carbon atoms, substituted or unsubstituted alkylidene having 1 to 20 carbon atoms, substituted or unsubstituted amino group, alkylalkoxy having 2 to 20 carbon atoms or arylalkoxy having 7 to 40 carbon atoms; and
n is 1 or 0.

2. The catalyst composition of claim 1 , wherein
in Chemical Formula 1, R 3 and R 5 are different from each other and each independently, an alkyl having 1 to 4 carbon atoms, and
R 4 and R 6 are different from each other and each independently, alkylaryl having 7 to 12 carbon atoms or aryl having 6 to 12 carbon atoms.

3. The catalyst composition of claim 1 , wherein
the compound represented by Chemical Formula 1 is represented by the following Chemical Formula 1-1.

4. The catalyst composition of claim 1 , wherein
the compound represented by Chemical Formula 2 is one selected from the group consisting of compounds represented by the following structural formulas.

5. The catalyst composition of claim 1 , further comprising:
one or more cocatalysts selected from the group consisting of the compounds represented by the following Chemical Formulas 3 to 5,
R 8 —[Al(R 7 )—O] m —R 9   [Chemical Formula 3]

in Chemical Formula 3,
R 7 , R 8 and R 9 are each independently any one of hydrogen, halogen, a hydrocarbyl group having 1 to 20 carbon atoms or a hydrocarbyl group having 1 to 20 carbon atoms substituted with halogen, and
m is an integer of 2 or more,
D(R 10 ) 3   [Chemical Formula 4]

in Chemical Formula 4,
D is aluminum or boron, and
each R 10 is independently halogen, a hydrocarbyl group having 1 to 20 carbon atoms, a hydrocarbyloxy group having 1 to 20 carbon atoms or hydrocarbyl group having 1 to 20 carbon atoms substituted with halogen,
[L-H] + [W(J) 4 ] − or [L] + [W(J) 4 ] −   [Chemical Formula 5]

in Chemical Formula 5,
L is neutral or cationic Lewis base,
W is a Group 13 atom, and J is independently, a hydrocarbyl group having 1 to 20 carbon atoms, a hydrocarbyloxy group having 1 to 20 carbon atoms; or a hydrocarbyl group having 1 to 20 carbon atoms or a hydrocarbyloxy group having 1 to 20 carbon atoms of which one or more hydrogen atoms are substituted with one or more substituents selected from the group consisting of halogen, a hydrocarbyloxy group having 1 to 20 carbon atoms and a hydrocarbyl(oxy)silyl group having 1 to 20 carbon atoms.

6. The catalyst composition of claim 1 , further comprising:
a carrier that supports the transition metal compound.

7. The catalyst composition of claim 6 , wherein
the carrier is silica, alumina, magnesia or a mixture thereof.

8. A method for preparing olefin polymer, comprising:
polymerizing olefin monomers in the presence of the catalyst composition of claim 1 .

9. The method for preparing olefin polymer of claim 8 , wherein
the olefin monomers include one or more selected from the group consisting of 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-eicosene, norbornene, norbonadiene, ethylidene norbordene, phenyl norbordene, vinyl norbordene, dicylcopentadiene, 1,4-butadiene, 1,5-pentadiene, 1,6-hexadiene, styrene, alpha-methylstyrene, divinylbenzene, and 3-chloromethlystyrene.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Ye Jin
• Lee Hye Kyung
• Song Eun Kyoung
• Hong Daesik
• Kim Byung Seok
• Shin Eunyoung
• Kwak Jinyoung

Classifications

• C08F2420/07

  Heteroatom-substituted Cp, i.e. Cp or analog where at least one of the substituent of the Cp or analog ring is or contains a heteroatom · CPC title

• C08F2420/10

  Heteroatom-substituted bridge, i.e. Cp or analog where the bridge linking the two Cps or analogs is substituted by at least one group that contains a heteroatom · CPC title

• C08F4/65927 Primary

  two cyclopentadienyl rings being mutually bridged · CPC title

• C08F4/65904

  in combination with another component of C08F4/64 · CPC title

• C08F4/52

  selected from boron, aluminium, gallium, indium, thallium or rare earths (C08F4/14 takes precedence) · CPC title