Method of preparing olefin-based polymer and olefin-based polymer prepared thereby

Patent metadata

Field	Value
Publication number	US-9550848-B2
Application number	US-201414779788-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Sep 26, 2013
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

The present invention relates to a method of preparing an olefin-based polymer including a step of polymerizing an olefin monomer in the presence of a catalyst composition including a cis isomer and a trans isomer. According to the method of preparing an olefin-based polymer according to an embodiment of the present invention, similar level of density and molecular weight may be exhibited with a relatively smaller amount of octene when compared to that of a common polymer. Thus, a stable olefin-based polymer having good copolymerization properties may be prepared.

First claim

The invention claimed is:

1. A method of preparing an olefin-based polymer, comprising polymerizing an olefin monomer in the presence of a catalyst composition including a transition metal compound of the following Formula 1:

in the above Formula 1,
M is a transition metal in group 4,
Q 1 and Q 2 are the same or different and independently hydrogen; halogen; alkyl having 1 to 20 carbon atoms; alkenyl having 2 to 20 carbon atoms; aryl having 6 to 20 carbon atoms; alkylaryl having 6 to 20 carbon atoms; arylalkyl having 7 to 20 carbon atoms; alkyl amido having 1 to 20 carbon atoms; aryl amido having 6 to 20 carbon atoms; or alkylidene having 1 to 20 carbon atoms,
R 1 to R 6 are the same or different and independently hydrogen; silyl; alkyl having 1 to 20 carbon atoms; alkenyl having 2 to 20 carbon atoms; aryl having 6 to 20 carbon atoms; alkylaryl having 7 to 20 carbon atoms; arylalkyl having 7 to 20 carbon atoms; or a metalloid radical of a metal in group 14 substituted with hydrocarbyl having 1 to 20 carbon atoms; R 1 and R 2 optionally connected from each other, or at least two of R 3 to R 6 optionally connected to each other to form an aliphatic ring having 5 to 20 carbon atoms or an aromatic ring having 6 to 20 carbon atoms; the aliphatic ring or the aromatic ring optionally substituted with halogen, alkyl having 1 to 20 carbon atoms, alkenyl having 2 to 20 carbon atoms or aryl having 6 to 20 carbon atoms, and
R 7 to R 11 are the same or different and independently hydrogen; alkyl having 1 to 20 carbon atoms; alkenyl having 2 to 20 carbon atoms; aryl having 6 to 20 carbon atoms; alkylaryl having 7 to 20 carbon atoms; or arylalkyl having 7 to 20 carbon atoms; at least two adjacent to each other of R 7 to R 11 optionally connected to each other to form an aliphatic ring having 5 to 20 carbon atoms or an aromatic ring having 6 to 20 carbon atoms; the aliphatic ring or the aromatic ring optionally substituted with halogen, alkyl having 1 to 20 carbon atoms, alkenyl having 2 to 20 carbon atoms or aryl having 6 to 20 carbon atoms.

2. The method of claim 1 , wherein the olefin-based polymer comprises a first semi-crystalline olefin-based polymer and a second semi-crystalline olefin-based polymer.

3. The method of claim 2 , wherein a fractional ratio of a peak for a first semi-crystalline olefin-based polymer (P1) is 5 to 95%, and a fractional ratio a peak for a second semi-crystalline olefin-based polymer (P2) is 5 to 95% when measuring temperature rising elution fractionation (TREF) of the olefin-based polymer.

4. The method of claim 1 , wherein R 1 and R 2 are alkyl having 1 to 20 carbon atoms.

5. The method of claim 1 , wherein M is Ti, Hf or Zr.

6. The method of claim 1 , wherein the catalyst composition further comprises at least one kind of a cocatalyst.

7. The method of claim 6 , wherein the cocatalyst comprises at least one selected from the following Formulae 12 to 14:
—[Al(R 18 )—O] a —  <Formula 12>

in the above Formula, R 18 is independently a halogen radical; a hydrocarbyl radical having 1 to 20 carbon atoms; or a hydrocarbyl radical having 1 to 20 carbon atoms substituted with halogen, and a is an integer greater than or equal to 2,
D(R 18 ) 3   <Formula 13>

in the above Formula, D is aluminum or boron, and R 18 is the same as in the above Formula 12,
[L-H] + [Z(A) 4 ] − or [L] + [Z(A) 4 ] −   <Formula 14>

in the above Formula, L is a neutral or cationic Lewis acid, H is a hydrogen atom, Z is an element in group 13, and A is independently aryl having 6 to 20 carbon atoms or alkyl having 1 to 20 carbon atoms, where at least one hydrogen atom optionally substituted with a substituent, and the substituent is halogen, hydrocarbyl having 1 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, or aryloxy having 6 to 20 carbon atoms.

8. The method of claim 1 , wherein the polymerizing of the olefin monomer comprises homopolymerizing of at least one monomer of an alpha-olefin monomer, a cyclic olefin monomer, a diene olefin monomer, a triene olefin monomer or a styrene monomer, or copolymerizing at least two monomers.

9. The method of claim 8 , wherein the copolymerizing is copolymerizing of ethylene and an alpha-olefin monomer having 2 to 12 carbon atoms.

10. The method of claim 9 , wherein an addition amount ratio of the ethylene and the alpha-olefin monomer having 2 to 12 carbon atoms is 1:0.2 to 4 by weight.

11. The method of claim 10 , wherein the density of the olefin-based polymer is in a range of 0.85 to 0.91 g/cc.

12. The method of claim 1 , wherein the polymerizing is performed by a liquid phase, a slurry phase, a bulk phase or a gaseous phase polymerization in a hydrocarbon solvent.

13. The method of claim 1 , wherein the polymerizing is performed in a continuous type reactor.

14. The method of claim 1 , wherein the polymerizing is performed in the presence of an inert gas.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Young Woo
• Park Hae Woong
• Park Sang Eun
• Lee Choong Hoon
• Kum Don Ho

Classifications

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title

• C08F2420/02

  Cp or analog bridged to a non-Cp X anionic donor · CPC title

• C08F4/65904

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

• C08F2500/03

  Narrow molecular weight distribution, i.e. Mw/Mn < 3 · CPC title

• C08F210/16 Primary

  Copolymers of ethene with alpha-alkenes, e.g. EP rubbers · CPC title