Olefin-based polymer with excellent processability

Patent metadata

Field	Value
Publication number	US-10344102-B2
Application number	US-201515504269-A
Country	US
Kind code	B2
Filing date	Sep 4, 2015
Priority date	Sep 5, 2014
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

Provided is an olefin-based polymer with excellent processability. The olefin-based polymer according to the present invention has a high molecular weight and a broad molecular weight distribution to show excellent processability and improved mechanical properties, thereby being usefully applied according to the intended use.

First claim

What is claimed is:

1. An olefin-based polymer,
wherein the olefin-based polymer is a copolymer of ethylene and an alpha-olefin-based comonomer, and wherein the olefin-based polymer has:
a molecular weight distribution (Mw/Mn) of 5 to 30;
a weight average molecular weight of from 100,000 to 160,000 g/mol;
a melt flow rate ratio (MFR 21.6 /MFR 2.16 ) of 35 to 200, which is measured at 190° C. in accordance with ASTM1238;
a slope of −0.8 to −0.2 in a curve of complex viscosity (η*[Pa·s]) versus frequency (ω[rad/s]); and
a CI (Co-monomer Incorporation) Index of 0.5 to 5, the CI index represented by the following Equation 1:
CI Index=SCB content at high molecular weight side−SCB content at low molecular weight side/SCB content at low molecular weight side  [Equation 1]

wherein the SCB (Short Chain Branch) content means a content (unit: branch/1,000 C) of side chain branches of 2 to 7 carbon atoms per 1,000 carbons, and
the SCB content at low molecular weight side and the SCB content at high molecular weight side mean SCB contents at the left border (SCB content at low molecular weight side) and the right border (SCB content at high molecular weight side) of centered 60% area excluding 20% of the left and right ends in the total area of a molecular weight distribution curve which is obtained by plotting a log value (log M) of a molecular weight (M) of the olefin-based polymer on the x-axis, and a molecular weight distribution (dwt/dlog M) with respect to the log value on the y-axis.

2. The olefin-based polymer of claim 1 , wherein its density is 0.930 to 0.950 g/cm 3 .

3. The olefin-based polymer of claim 1 , wherein the olefin-based polymer has LCB (Long Chain Branch).

4. The olefin-based polymer of claim 1 , wherein the olefin-based polymer is prepared by polymerizing ethylene and the alpha-olefin-based comonomer in the presence of a hybrid supported metallocene catalyst comprising one or more first metallocene compounds represented by the following Chemical Formula 1; one or more second metallocene compounds selected from compounds represented by the following Chemical Formulae 3 to 5; a cocatalyst compound; and a support:

wherein A is hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C6 to C20 aryl group, a C7 to C20 alkylaryl group, a C7 to C20 arylalkyl group, a C1 to C20 alkoxy group, a C2 to C20 alkoxyalkyl group, a C3 to C20 heterocycloalkyl group, or a C5 to C20 heteroaryl group;
D is —O—, —S—, —N(R)— or —Si(R)(R′)—, wherein R and R′ are the same as or different from each other, and each independently hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, or a C6 to C20 aryl group;
L is a linear or branched C1 to C10 alkylene group;
B is carbon, silicon, or germanium;
Q is hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C6 to C20 aryl group, a C7 to C20 alkylaryl group, or a C7 to C20 arylalkyl group;
M is a Group 4 transition metal;
X 1 and X 2 are the same as or different from each other, and each independently halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C6 to C20 aryl group, a nitro group, an amido group, a C1 to C20 alkylsilyl group, a C1 to C20 alkoxy group, or a C1 to C20 sulfonate group;
C 1 and C 2 are the same as or different from each other, and each independently represented by one of the following Chemical Formula 2a, the following Chemical Formula 2b, or the following Chemical Formula 2c, excluding that both C 1 and C 2 are Chemical Formula 2c;

wherein R 1 to R 17 and R 1 ′ to R 9 ′ are the same as or different from each other, and each independently hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C1 to C20 alkylsilyl group, a C1 to C20 silylalkyl group, a C1 to C20 alkoxysilyl group, a C1 to C20 alkoxy group, a C6 to C20 aryl group, a C7 to C20 alkylaryl group, or a C7 to C20 arylalkyl group, and two or more adjacent groups of R 10 to R 17 are connected to each other to form substituted or unsubstituted aliphatic rings or aromatic rings;
(Cp 1 R a ) n (Cp 2 R b )M 1 Z 1 3-n   [Chemical Formula 3]

 wherein M 1 is a Group 4 transition metal;
Cp 1 and Cp 2 are the same as or different from each other, and each independently any one selected from the group consisting of cyclopentadienyl, indenyl, 4,5,6,7-tetrahydro-1-indenyl, and fluorenyl radicals, each of which may be substituted with a hydrocarbon having 1 to 20 carbon atoms;
R a and R b are the same as or different from each other, and each independently hydrogen, C1 to C20 alkyl, C1 to C10 alkoxy, C2 to C20 alkoxyalkyl, C6 to C20 aryl, C6 to C10 aryloxy, C2 to C20 alkenyl, C7 to C40 alkylaryl, C7 to C40 arylalkyl, C8 to C40 arylalkenyl, or C2 to C10 alkynyl;
Z 1 is a halogen atom, C1 to C20 alkyl, C2 to C10 alkenyl, C7 to C40 alkylaryl, C7 to C40 arylalkyl, C6 to C20 aryl, substituted or unsubstituted C1 to C20 alkylidene, substituted or unsubstituted amino group, C2 to C20 alkylalkoxy, or C7 to C40 arylalkoxy;
n is 1 or 0;
(Cp 3 R c ) m B 1 (Cp 4 R d )M 2 Z 2 3-m   [Chemical Formula 4]

 wherein M 2 is a Group 4 transition metal;
Cp 3 and Cp 4 are the same as or different from each other, and each independently any one selected from the group consisting of cyclopentadienyl, indenyl, 4,5,6,7-tetrahydro-1-indenyl, and fluorenyl radicals, each of which may be substituted with a hydrocarbon having 1 to 20 carbon atoms;
R c and R d are the same as or different from each other, and each independently hydrogen, C1 to C20 alkyl, C1 to C10 alkoxy, C2 to C20 alkoxyalkyl, C6 to C20 aryl, C6 to C10 aryloxy, C2 to C20 alkenyl, C7 to C40 alkylaryl, C7 to C40 arylalkyl, C8 to C40 arylalkenyl, or C2 to C10 alkynyl;
Z 2 is a halogen atom, C1 to C20 alkyl, C2 to C10 alkenyl, C7 to C40 alkylaryl, C7 to C40 arylalkyl, C6 to C20 aryl, substituted or unsubstituted C1 to C20 alkylidene, a substituted or unsubstituted amino group, C2 to C20 alkylalkoxy, or C7 to C40 arylalkoxy;
B 1 is one or more of radicals containing a carbon, germanium, silicon, phosphorous, or nitrogen atom, which crosslink Cp 3 R c ring to Cp 4 R d ring or crosslink one Cp 4 R d ring to M 2 , or a combination thereof, and
m is 1 or 0;
(Cp 5 R e )B 2 (J)M 3 Z 3 2   [Chemical Formula 5]

wherein M 3 is a Group 4 transition metal;
Cp 5 is any one selected from the group consisting of cyclopentadienyl, indenyl, 4,5,6,7-tetrahydro-1-indenyl and fluorenyl radicals, each of which may be substituted with a hydrocarbon having 1 to 20 carbon atoms;
R e is hydrogen, C1 to C20 alkyl, C1 to C10 alkoxy, C2 to C20 alkoxyalkyl, C6 to C20 aryl, C6 to C10 aryloxy, C2 to C20 alkenyl, C7 to C40 alkylaryl, C7 to C40 arylalkyl, C8 to C40 arylalkenyl, or C2 to C10 alkynyl;
Z 3 is a halogen atom, C1 to C20 alkyl, C2 to C10 alkenyl, C7 to C40 alkylaryl, C7 to C40 arylalkyl, C6 to C20 aryl, substituted or unsubstituted C1 to C20 alkylidene, a substituted or unsubstituted amino group, C2 to C20 alkylalkoxy, or C7 to C40 arylalkoxy;
B 2 is one or more of radicals containing a carbon, germanium, silicon, phosphorous or nitrogen atom, which crosslink Cp 5 R e ring to J, or a combination thereof; and
J is any one selected from the group consisting of NR f , O, PR f and S, wherein R f is C1 to C20 alkyl, aryl, substituted alkyl, or substituted aryl.

5. The olefin-based polymer of claim 4 , wherein R 1 to R 17 and R 1 ′ to R 9 ′

Assignees

• Lg Chemical Ltd

Inventors

• Kim Joong Soo
• Sung Yu Taek
• Lee Ki Soo
• Hong Dae Sik
• Song Ki Heon
• Song Eun Kyoung
• Kwon Heon Yong
• Lee Yong Ho
• Jeong Dong Hoon
• Sun Soon Ho
• Kim Sun Mi

Classifications

• C08F2500/04

  Broad molecular weight distribution, i.e. Mw/Mn > 6 · CPC title

• C08F210/16 Primary

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

• C08F4/65912

  in combination with an organoaluminium compound · CPC title

• B01J27/24

  Nitrogen compounds · CPC title