Olefin-based copolymer and method for preparing the same

Patent metadata

Field	Value
Publication number	US-11629208-B2
Application number	US-201917050198-A
Country	US
Kind code	B2
Filing date	May 3, 2019
Priority date	May 4, 2018
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

An olefin-based copolymer and a method of making the same are disclosed herein. In some embodiments, an 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, a number of unsaturated functional groups (total V) per 1,000 carbon atoms of 0.8 or less, a vinylene content, and a vinyl content, wherein the vinylene content, the vinyl content and the total V satisfy (a) vinylene content/total V=0.1 to 0.7 and (b) vinylene content/vinyl content=0.8 to 1.6. The olefin-based copolymer has controlled content and kind of an unsaturated functional group in the olefin-based copolymer and thus, has high flowability, and may show improved physical properties of hardness, flexural strength and tensile strength.

First claim

The invention claimed is:

1. An olefin-based copolymer having
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,
a number of unsaturated functional groups (total V) per 1,000 carbon atoms of 0.8 or less,
a number of vinylene (vinylene content) per 1,000 carbon atoms, wherein the vinylene has a chemical formula of —CH═CH—, and
a number of vinyl (vinyl content) per 1,000 carbon atoms,
wherein the vinylene content, the vinyl content, and the total V satisfy the following (a) and (b):
(a) vinylene content/total V=0.1 to 0.7, and
(b) vinylene content/vinyl content=0.8 to 1.6.

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 total V is 0.15 to 0.7.

5. The olefin-based copolymer according to claim 1 , wherein:
(a) vinylene content/total V=0.2 to 0.6, and
(b) vinylene content/vinyl content=0.8 to 1.5.

6. 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.

7. The olefin-based copolymer according to claim 6 , wherein the alpha-olefin comonomer comprises any one selected from the group consisting of 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, norbornene, norbornadiene, ethylidene norbornene, phenyl norbornene, vinyl norbornene, dicyclopentadiene, 1,4-butadiene, 1,5-pentadiene, 1,6-hexadiene, styrene, alpha-methylstyrene, divinylbenzene and 3-chloromethylstyrene, and a mixture of two or more thereof.

8. The olefin-based copolymer according to claim 1 , wherein (b) vinylene content/vinyl content=0.9 to 1.4.

Assignees

• Lg Chemical Ltd

Inventors

• Park In Sung
• Lee Eun Jung
• Ju Hyun Jin
• Park Sang Eun
• 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

• C08F4/6495

  containing nitrogen · CPC title

• C08F4/65912

  in combination with an organoaluminium compound · CPC title

• C08F4/6592

  containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring · CPC title

• C08F210/14

  Monomers containing five or more carbon atoms · CPC title