Olefin-based polymer

Patent metadata

Field	Value
Publication number	US-11339235-B2
Application number	US-201816640263-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Dec 22, 2017
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

The present invention relates to an olefin-based polymer, which has (1) a density (d) ranging from 0.850 g/cc to 0.865 g/cc, (2) a melt index (MI, 190° C., 2.16 kg load conditions) ranging from 0.1 g/10 min to 3.0 g/10 min, (3) a melt temperature (Tm) of 10° C. to 100° C., and (4) a hardness (H, Shore A), the density (d) and the melt temperature (Tm) satisfying Equation 1, and Equation 2 or 3. The olefin-based polymer according to the present invention has low hardness and improved foaming properties, and exhibits improved impact strength at compounding.

First claim

The invention claimed is:

1. An olefin-based polymer, which has (1) a density (d) ranging from 0.850 g/cc to 0.865 g/cc, (2) a melt index (MI, 190° C., 2.16 kg load conditions) ranging from 0.1 g/10 min to 3.0 g/10 min, (3) a melt temperature (Tm) of 10° C. to 100° C., and (4) a hardness (H, Shore A) defined by the following Equation 1:
H= 1293× d+A,   [Equation 1]

in Equation 1, A satisfies Equation 2 or Equation 3 below:
Tm ×(0.855× Tm− 62)< A<d×− 1238,  [Equation 2]

d×− 1238< A<Tm ×(0.855× Tm− 62),  [Equation 3]

in Equations 1 to 3, H is the hardness (shore A), d is the density, and Tm is the melt temperature.

2. The olefin-based polymer according to claim 1 , wherein the olefin-based polymer has (5) a soluble fraction (SF) of 8 wt % or more at −20° C. in cross-fractionation chromatography (CFC), in which a weight average molecular weight (Mw) of the soluble fraction is in a range of 50,000 g/mol to 120,000 g/mol.

3. The olefin-based polymer according to claim 1 , wherein the olefin-based polymer has (6) a molecular weight distribution (MWD) in a range of 1.0 to 3.0.

4. The olefin-based polymer according to claim 1 , wherein the olefin-based polymer has (7) a weight average molecular weight (Mw) in a range of 10,000 to 500,000.

5. The olefin-based polymer according to claim 1 , wherein the hardness (Shore A) of the olefin-based polymer is 50 or less.

6. The olefin-based polymer according to claim 1 , wherein the melt index (MI) of the olefin-based polymer is in a range of 0.5 g/10 min to 2.0 g/10 min.

7. The olefin-based polymer according to claim 1 , wherein the hardness (shore A) of the olefin-based polymer is in a range of 30 to 50, when the density of the olefin-based polymer is in a range of 0.855 g/cc to 0.865 g/cc and the melt index (MI) of the olefin-based polymer is in a range of 0.95 g/10 min to 1.2 g/10 min.

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

9. The olefin-based polymer according to claim 8 , wherein the alpha-olefin comonomer includes 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, or a mixture of at least two thereof.

10. The olefin-based polymer according to claim 8 , wherein the alpha-olefin comonomer is in an amount of 90 wt % or less.

11. The olefin-based polymer according to claim 1 , wherein the olefin-based polymer is a copolymer of ethylene and 1-octene.

12. The olefin-based polymer according to claim 1 , wherein the olefin-based polymer is obtained by a method of preparing an olefin-based polymer including a step of polymerizing an olefin-based monomer in the presence of a catalyst composition for olefin polymerization including a transition metal compound represented by the following Formula 1 and a transition metal compound represented by the following Formula 2 in a molar ratio of 1:1 to 1:5:

in Formula 1,
R 1 s are the same or different, and each R 1 independently represents hydrogen, an alkyl having 1 to 20 carbon atoms, an alkenyl having 2 to 20 carbon atoms, an aryl, a silyl, an alkylaryl, an arylalkyl or a metalloid radical of a Group 4 metal substituted with a hydrocarbyl;
R 2 s are the same or different, and each R 2 independently represents hydrogen; a halogen; an alkyl having 1 to 20 carbon atoms; an aryl; an alkoxy; an aryloxy; or an amido radical, and two or more of the R 2 s are optionally connected to each other to form an aliphatic ring or an aromatic ring;
R 3 s are the same or different, and each R 3 independently represents hydrogen; a halogen; an alkyl having 1 to 20 carbon atoms; or an aliphatic or aromatic ring which contains nitrogen and is substituted with an aryl radical or unsubstituted, and when a number of substituents is plural, the substituents are optionally connected to each other to form an aliphatic or aromatic ring;
M 1 is a Group 4 transition metal; and
Q 1 and Q 2 each independently represent a halogen; an alkyl having 1 to 20 carbon atoms; an alkenyl; an aryl; an alkylaryl; an arylalkyl; an alkylamido having 1 to 20 carbon atoms; or an arylamido;

in Formula 2,
R 4 s are the same or different, and each R 4 independently represents hydrogen, an alkyl having 1 to 20 carbon atoms, an alkenyl having 2 to 20 carbon atoms, an aryl, a silyl, an alkylaryl, an arylalkyl or a metalloid radical of a Group 4 metal substituted with a hydrocarbyl;
R 5 s are the same or different, and each R 5 independently represents hydrogen; a halogen; an alkyl having 1 to 20 carbon atoms; an aryl; an alkoxy; an aryloxy; or an amido radical, and two or more of the R 5 s are optionally connected to each other to form an aliphatic ring or an aromatic ring;
R 6 s are the same or different, and each R 6 independently represents hydrogen; a halogen; an alkyl having 1 to 20 carbon atoms; or an aliphatic or aromatic ring which contains nitrogen and is substituted with an aryl radical or unsubstituted, and when a number of substituents is plural, the substituents are optionally connected to each other to form an aliphatic or aromatic ring;
M 2 is a Group 4 transition metal; and
Q 3 and Q 4 each independently represent a halogen; an alkyl having 1 to 20 carbon atoms; an alkenyl; an aryl; an alkylaryl; an arylalkyl; an alkylamido having 1 to 20 carbon atoms; or an arylamido.

13. The olefin-based polymer according to claim 12 , wherein the olefin-based polymer is prepared by a continuous solution polymerization reaction using a continuous stirred tank reactor in the presence of the catalyst composition for olefin polymerization.

14. The olefin-based polymer according to claim 12 , wherein the transition metal compound represented by Formula 1 is one or more selected from the group consisting of the following Formulae 1-1 and 1-2, and the transition metal compound represented by Formula 2 has the following Formula 2-1:

15. An olefin-based polymer, which has:
a density (d) ranging from 0.850 g/cc to 0.865 g/cc;
a melt index (MI, 190° C., 2.16 kg load conditions) ranging from 0.1 g/10 min to 3.0 g/10 min;
a soluble fraction (SF) of 10 wt % or more at −20° C. in cross-fractionation chromatography (CFC), in which a weight average molecular weight (Mw) of the soluble fraction is in a range of 50,000 g/mol to 120,000 g/mol;
a vinyl group content per 1,000 carbon atoms of 0.06 to 1, which is determined by infrared absorption measurement;
a MFR10/MFR2.16 of 8.5 or less, which is a ratio of a melt flow rate measured ASTM D1238 at 190° C. 10 kg load and ASTM D1238 at 190° C. 2.16 kg load; and
a hardness (H, Shore A) defined by the following Equation 1:
H= 1293× d+A,   [Equation 1]

in Equation 1, A satisfies Equation 2 or Equation 3 below:
Tm ×(0.855× Tm− 62)< A<d×− 1238,  [Equation 2]

d×− 1238< A<Tm ×(0.855× Tm− 62),  [Equation 3]

in Equations 1 to 3, H is the hardness (shore A), d is the density, and Tm is the melt temperature.

Assignees

• Lg Chemical Ltd

Inventors

• Park In Sung
• Lee Eun Jung
• Ju Hyun Jin
• Park Sang Eun
• Bae Kyung Bok
• Lee Choong Hoon

Classifications

• C08F210/16 Primary

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

• C08F210/14 Primary

  Monomers containing five or more carbon atoms · CPC title

• C08F2500/34

  Melting point [Tm] · CPC title

• C08F2/01

  characterised by special features of the polymerisation apparatus used · CPC title

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title