Olefin-based polymer and preparation method thereof

Patent metadata

Field	Value
Publication number	US-9353295-B2
Application number	US-201414526199-A
Country	US
Kind code	B2
Filing date	Oct 28, 2014
Priority date	Jul 1, 2010
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

The present invention relates to an olefin-based polymer which exhibits superior processability and superior adhesive properties and therefore is desirably applicable to a hot-melt adhesive (HMA) or the like, and a preparation method thereof. The olefin-based polymer has a molecular weight distribution (Mw/Mn, PDI) of 2˜3, and a density of 0.85 to 0.88 g/cm 3 , and satisfies the relation of Tc−Tm>0, wherein Tc (° C.) is a crystallization temperature and Tm (° C.) is a melting point.

First claim

What is claimed is:

1. An olefin-based polymer having a melt index under a load of 2.16 kg of more than 500 g/10 min and a zero shear viscosity of 20 Pa*S or less, and
satisfying the relation of Tc−Tm>0, wherein Tc (° C.) is a crystallization temperature of 60 to 90° C. and Tm (° C.) is a melting point of 50 to 70° C.

2. The olefin-based polymer according to claim 1 , wherein its weight average molecular weight (Mw) is 1,000 to 80,000.

3. The olefin-based polymer according to claim 1 , having a molecular weight distribution (Mw/Mn, PDI) of 2˜3 and a density of 0.85 to 0.88 g/cm 3 .

4. The olefin-based polymer according to claim 1 , wherein it is an ethylene-alpha olefin copolymer.

5. The olefin-based polymer according to claim 4 , wherein the alpha olefin includes one or more 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-dodecene, 1-tetradecene, 1-hexadecene, and 1-itocene.

6. The olefin-based polymer according to claim 4 , wherein the molar ratio of ethylene:alpha olefin is 1:100 to 100:1.

Assignees

• Lg Chemical Ltd

Inventors

• Kum Don-Ho
• Lee Eun-Jung
• Ha Jong-Joo
• Lee Choong-Hoon

Classifications

• C08F210/16

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

• C09J123/0815 Primary

  Copolymers of ethene with aliphatic 1-olefins · CPC title

• C08F4/6592

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

• C08F2500/08

  Low density, i.e. < 0.91 g/cm3 · CPC title

• C08F4/65908

  in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+ · CPC title