Olefin-based copolymer and method for preparing the same

Patent metadata

Field	Value
Publication number	US-11732071-B2
Application number	US-201917050089-A
Country	US
Kind code	B2
Filing date	May 3, 2019
Priority date	May 4, 2018
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

An olefin-based copolymer and method of making the same are disclosed herein. In some embodiments, the olefin-based copolymer includes a repeating unit derived from an alpha-olefin, wherein the alphas-olefin is present in the copolymer at 15 wt % to 45 wt %, wherein the copolymer has a density (d) of 0.85 to 0.89 g/cc, a melt index (MI), measured at 190° C. and 2.16 kg load, of 15 g/10 min to 100 g/10 min, and a hardness defined by Equation 1. The olefin-based copolymer has improved hardness and is highly flowable, and may show improved physical properties of tensile strength, elongation rate and flexural modulus.

First claim

The invention claimed is:

1. An olefin-based copolymer comprising a repeating unit derived from an alpha-olefin,
wherein the repeating unit is present in the olefin-based copolymer from 25.2 wt % to 45 wt %,
wherein the olefin-based copolymer has:
a density (d) of 0.85 to 0.89 g/cc
a melt index (MI), measured at 190° C. and 2.16 kg load, of 15 g/10 min to 100 g/10 min, and
a Shore A hardness defined by Equation 1,
Hardness=0.0082× MI 2 −0.99× d×MI+A   [Equation 1]

wherein 97×d<A<101×d.

2. The olefin-based copolymer according to claim 1 , wherein the olefin-based copolymer has a weight average molecular weight (Mw) of 10,000 g/mol to 80,000 g/mol.

3. The olefin-based copolymer according to claim 1 , wherein the olefin-based copolymer has a molecular weight distribution (MWD) of 1.5 to 3.0.

4. The olefin-based copolymer according to claim 1 , wherein the Shore A hardness ranges from 30 to 80.

5. The olefin-based copolymer according to claim 1 , wherein the olefin-based copolymer is a copolymer of ethylene and an alpha-olefin comonomer of 3 to 12 carbon atoms.

6. The olefin-based copolymer according to claim 5 , wherein the alpha-olefin comonomer comprises any one selected from 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-eicocene, or a mixture of two or more thereof.

7. A method for preparing the olefin-based copolymer of claim 1 , the method comprising:
polymerizing an olefin-based monomer by injecting hydrogen in 10 to 100 cc/min in the presence of a catalyst composition to prepare an olefin-based copolymer, the catalyst composition comprising a transition metal compound represented by Formula 1:

in Formula 1,
R 1 is hydrogen, alkyl of 1 to 20 carbon atoms, cycloalkyl of 3 to 20 carbon atoms, alkenyl of 2 to 20 carbon atoms, alkoxy of 1 to 20 carbon atoms, aryl of 6 to 20 carbon atoms, arylalkoxy of 7 to 20 carbon atoms; alkylaryl of 7 to 20 carbon atoms, or arylalkyl of 7 to 20 carbon atoms,
R 2a to R 2e are each independently hydrogen, halogen, alkyl of 1 to 20 carbon atoms, cycloalkyl of 3 to 20 carbon atoms, alkenyl of 2 to 20 carbon atoms, alkoxy of 1 to 20 carbon atoms, or aryl of 6 to 20 carbon atoms,
R 3 is hydrogen, halogen, alkyl of 1 to 20 carbon atoms, cycloalkyl of 3 to 20 carbon atoms, alkenyl of 2 to 20 carbon atoms, aryl of 6 to 20 carbon atoms, alkylaryl of 6 to 20 carbon atoms, arylalkyl of 7 to 20 carbon atoms, alkyl amido of 1 to 20 carbon atoms, aryl amido of 6 to 20 carbon atoms, alkylidene of 1 to 20 carbon atoms, or phenyl which is substituted with one or more selected from the group consisting of halogen, alkyl of 1 to 20 carbon atoms, cycloalkyl of 3 to 20 carbon atoms, alkenyl of 2 to 20 carbon atoms, alkoxy of 1 to 20 carbon atoms and aryl of 6 to 20 carbon atoms,
R 4 to R 9 are each independently hydrogen, silyl, alkyl of 1 to 20 carbon atoms, cycloalkyl of 3 to 20 carbon atoms; alkenyl of 2 to 20 carbon atoms, aryl of 6 to 20 carbon atoms, alkylaryl of 7 to 20 carbon atoms, arylalkyl of 7 to 20 carbon atoms, or a metalloid radical of a metal in group 14, which is substituted with hydrocarbyl of 1 to 20 carbon atoms, among the R 6 to R 9 , adjacent two or more are optionally connected with each other to form a ring,
Q is Si, C, N, P or S,
M is a transition metal in group 4, and
X 1 and X 2 are each independently hydrogen, halogen, alkyl of 1 to 20 carbon atoms, cycloalkyl of 3 to 20 carbon atoms, alkenyl of 2 to 20 carbon atoms, aryl of 6 to 20 carbon atoms, alkylaryl of 7 to 20 carbon atoms; arylalkyl of 7 to 20 carbon atoms, alkylamino of 1 to 20 carbon atoms, arylamino of 6 to 20 carbon atoms, or alkylidene of 1 to 20 carbon atoms.

8. The method for preparing the olefin-based copolymer according to claim 7 , wherein
R 1 is hydrogen, alkyl of 1 to 12 carbon atoms, cycloalkyl of 3 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, aryl of 6 to 12 carbon atoms, arylalkoxy of 7 to 13 carbon atoms, alkylaryl of 7 to 13 carbon atoms, or arylalkyl of 7 to 13 carbon atoms,
R 2a to R 2e are each independently hydrogen, halogen, alkyl of 1 to 12 carbon atoms, cycloalkyl of 3 to 12 carbon atoms' alkenyl of 2 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, or phenyl,
R 3 is hydrogen, halogen; alkyl of 1 to 12 carbon atoms, cycloalkyl of 3 to 12 carbon atoms, alkenyl of 2 to 12 carbon atoms, alkylaryl of 7 to 13 carbon atoms, arylalkyl of 7 to 13 carbon atoms, phenyl, or phenyl which is substituted with one or more selected from the group consisting of halogen, alkyl of 1 to 12 carbon atoms, cycloalkyl of 3 to 12 carbon atoms, alkenyl of 2 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms and phenyl,
R 4 to R 9 are each independently hydrogen, alkyl of 1 to 12 carbon atoms, cycloalkyl of 3 to 12 carbon atoms, aryl of 6 to 12 carbon atoms, alkylaryl of 7 to 13 carbon atoms, or arylalkyl of 7 to 13 carbon atoms,
among the R 6 to R 9 , adjacent two or more are optionally connected with each other to form an aliphatic ring of 5 to 12 carbon atoms or an aromatic ring of 6 to 12 carbon atoms,
the aliphatic ring or the aromatic ring may be substituted with halogen, alkyl of 1 to 12 carbon atoms, alkenyl of 2 to 12 carbon atoms, or aryl of 6 to 12 carbon atoms,
Q is Si,
M is Ti, and
X 1 and X 2 are each independently hydrogen, halogen, alkyl of 1 to 12 carbon atoms, or alkenyl of 2 to 12 carbon atoms.

9. The method for preparing the olefin-based copolymer according to claim 7 , wherein the transition metal compound is one selected from the group consisting of compounds of 1-1 to Formula 1-10:

10. The method for preparing the olefin-based copolymer according to claim 7 , wherein the polymerizing is performed at 110° C. to 160° C.

Assignees

• Lg Chemical Ltd

Inventors

• Park Sang Eun
• Lee Eun Jung
• Ju Hyun Jin
• Park In Sung
• Lee Choong Hoon
• Gong Jin Sam
• Jun Jung Ho
• Gwak Rae Keun

Classifications

• C08F210/16 Primary

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

• C08F2420/02

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

• C08F2420/06

  Cp analog where at least one of the carbon atoms of the non-coordinating part of the condensed ring is replaced by a heteroatom · CPC title

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title

• C08F2500/18

  Bulk density · CPC title