Olefin block copolymers and production methods thereof

Patent metadata

Field	Value
Publication number	US-9238701-B2
Application number	US-201314144277-A
Country	US
Kind code	B2
Filing date	Dec 30, 2013
Priority date	Jan 27, 2011
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

The present description relates to olefin block copolymers having excellent elasticity and processability in conjunction with enhanced heat resistance, and to a preparation method thereof. The olefin block copolymers comprise a plurality of blocks or segments that comprise ethylene or propylene repeating units and α-olefin repeating units at different mole fractions from one another, wherein the block copolymer shows peaks at the 2θ of 21.5±0.5° and 23.7±0.5° in a wide-angle x-ray diffraction (WAXD) pattern, and the peak ratio defined by (the peak area at 21.5±0.5°)/(the peak area at 23.7±0.5°) is no more than 3.0.

First claim

What is claimed is:

1. A method of producing an olefin block copolymer, comprising:
subjecting ethylene or propylene and a C 4 or more α-olefin to copolymerization in the presence of a catalyst composition comprising a metallocene catalyst having a Group IV transition metal, and a cocatalyst;
wherein the metallocene catalyst having the Group IV transition metal comprises a metallocene compound of Chemical Formula 1:

in Chemical Formula 1, R1 to R17 are the same with or different from each other, and are independently hydrogen, a halogen, a C 1 - C 20 alkyl group, a C 2 - C 20 alkenyl group, a C 6 - C 20 aryl group, a C 7 - C 20 alkylaryl group, or a C 7 - C 20 arylalkyl group, respectively,
L is a straight or branched chain C 1 - C 10 alkylene group,
D has an unshared electron pair and is —O—, —S— or —N(R)—, in which R is hydrogen, a halogen, a C 1 - C 20 alkyl group, a C 2 - C 20 alkenyl group, or a C 6 - C 20 aryl group,
A is hydrogen, a halogen, a C 1 - C 20 alkyl group, a C 2 - C 20 alkenyl group, a C 6 - C 20 aryl group, a C 7 - C 20 alkylaryl group, a C 7 - C 20 arylalkyl group, a C 2 - C 20 alkoxy alkyl group, a C 2 - C 20 heterocyclic alkyl group, or a C 5 - C 20 heteroaryl group, and
M is a Group IV transition metal, X 1 and X 2 are the same with or different from each other, and are independently a halogen, a C 1 - C 20 alkyl group, a C 2 - C 20 alkenyl group, a C 6 - C 20 aryl group, a nitro group, an amido group, a C 1 - C 20 alkylsilyl group, a C 1 - C 20 alkoxy group, or a C 1 - C 20 sulfonate group, respectively.

2. The method of producing an olefin block copolymer in accordance with claim 1 , wherein the C 4 or more α-olefin is at least one selected from the group consisting of 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-undecene, 1-do decene, 1-tetradecene, 1-hexadecene, and 1-itocene.

3. The method of producing an olefin block copolymer in accordance with claim 1 , wherein the cocatalyst comprises a compound of Chemical Formula 3:
—[A1(R18)—O] n —  [Chemical Formula 3]

in Chemical Formula 3, R18s are the same with or different from each other, and are independently a C1- C20 hydrocarbon; or a C1-C20 hydrocarbon substituted with a halogen; and n is an integer of at least two.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Yong-Ho
• Jeon Man-Seong
• Kwon Heon-Yong
• Cho Min-Seok
• Kim Seon-Kyoung
• Hong Dae-Sik
• Sohn Se-Hui
• Lee Ki-Soo
• Lim Kyoung-Chan

Classifications

• C08F210/14 Primary

  Monomers containing five or more carbon atoms · CPC title

• C08F297/083 Primary

  the monomers being ethylene or propylene · CPC title

• C08F4/65912

  in combination with an organoaluminium compound · CPC title

• C08F210/16

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

• C08F4/65927

  two cyclopentadienyl rings being mutually bridged · CPC title