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Olefin-based polymer

A technology of polymers and olefins, applied in the field of low-density olefin-based polymers, can solve the problems of complex process, low miscibility, poor viscosity balance of grafted polymers and polar resins, etc., and achieve the goal of improving anti-adhesive properties Effect

Inactive Publication Date: 2020-08-07
LG CHEM LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has problems in that crosslinking and molecular chain scission in polyolefin molecules occur during the grafting reaction, and the viscosity balance of the grafted polymer and the polar resin is poor, so miscibility is low
There is also a problem that the appearance characteristics of molded articles are poor due to gel components generated by intramolecular crosslinking or foreign substances generated by molecular chain scission
However, the disadvantage of these methods is that the polymerization activity is very low
Therefore, a method of protecting a polar group by a protecting group has been carried out, but there is a problem that the process becomes complicated because the protecting group should be removed again after the reaction when the protecting group is introduced
[0012] As described above, various studies have been conducted on ansa-metallocene compounds capable of controlling the microstructure of olefin-based polymers and having higher activity, but the studies are still insufficient.

Method used

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Examples

Experimental program
Comparison scheme
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preparation example Construction

[0118]In the first method in the preparation method of the above-mentioned catalyst composition, the molar ratio of the transition metal compound represented by formula 1 and the transition metal compound represented by formula 2 / the compound represented by formula 3 or 4 can be 1 / 5,000 to 1 / 2, especially in the range of 1 / 1000 to 1 / 10, more particularly in the range of 1 / 500 to 1 / 20. When the molar ratio of the transition metal compound represented by formula 1 and the transition metal compound represented by formula 2 / compound represented by formula 3 or 4 exceeded 1 / 2, the amount of the alkylating agent was very small, so the alkylation of the metal compound did not fully carried out. When the molar ratio was less than 1 / 5000, the alkylation of the metal compound was carried out, but due to the side reaction between the remaining excess alkylating agent and the activator of the compound of formula 5, the alkylation of the metal compound could not be fully realized activat...

preparation Embodiment 1

[0135] Preparation Example 1: Preparation of Transition Metal Compound 1

[0136] (1) Preparation of 8-(2,3,4,5-tetramethyl-1,3-cyclopentadienyl)-1,2,3,4-tetrahydroquinoline

[0137]

[0138] (i) Preparation of lithium carbamate

[0139] 1,2,3,4-Tetrahydroquinoline (13.08 g, 98.24 mmol) and diethyl ether (150 mL) were added to the Schlenk flask. The above-mentioned Schlenk flask was immersed in a -78°C low-temperature bath formed of dry ice and acetone, and stirred for 30 minutes. Subsequently, n-BuLi (39.3 mL, 2.5 M, 98.24 mmol) was added thereto via a syringe under a nitrogen atmosphere, thereby forming a pale yellow slurry. Then, after the flask was stirred for 2 hours, the temperature of the flask was raised to room temperature while removing generated butane gas. The flask was again immersed in a cryogenic bath at -78 °C to lower the temperature, and then CO was introduced into it 2 gas. When carbon dioxide gas was introduced, the slurry disappeared and the solu...

preparation Embodiment 2

[0154] Preparation Example 2: Preparation of Transition Metal Compound 2

[0155] (1) Preparation of 2-methyl-7-(2,3,4,5-tetramethyl-1,3-cyclopentadienyl)indoline

[0156] Prepare in the same manner as (1) of Preparation Example 1, except that 2-methylindoline is used instead of 1,2,3,4-tetrahydroquinoline in (1) of Preparation Example 1 2-methyl-7-(2,3,4,5-tetramethyl-1,3-cyclopentadienyl)indoline. The yield was 19%.

[0157] 1 H NMR (C 6 D. 6 ): δ6.97(d, J=7.2Hz, 1H, CH), δ6.78(d, J=8Hz, 1H, CH), δ6.67(t, J=7.4Hz, 1H, CH), δ3 .94(m, 1H, quinoline-CH), δ3.51(br s, 1H, NH), δ3.24-3.08(m, 2H, quinoline-CH 2 ,Cp-CH),δ2.65(m,1H,quinoline-CH 2 ),δ1.89(s,3H,Cp-CH 3 ),δ1.84(s,3H,Cp-CH 3 ),δ1.82(s,3H,Cp-CH 3 ), δ1.13(d, J=6Hz, 3H, quinoline-CH 3 ),δ0.93(3H,Cp-CH 3 ) ppm.

[0158] (2) Preparation of [(2-methylindolin-7-yl)tetramethylcyclopentadienyl-η5,κ-N]dimethyltitanium

[0159]

[0160] (i) except that 2-methyl-7-(2,3,4,5-tetramethyl-1,3-cyclopentadienyl)-indo...

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Abstract

The present invention relates to an olefin-based polymer having (1) a density of 0.85 to 0.865 g / cc, (2) a melt index (MI) of 0.1 g / 10 min. to 3.0 g / 10 min. at 190 DEG C under a load condition of 2.16kg, (3) a soluble fraction (SF) of 10% or more at -20 DEG C in cross-fractionation chromatography (CFC), and a weight average molecular weight (MW) for corresponding fraction of 50,000 g / mol to 500,000 g / mol. The olefin-based polymer according to the present invention exhibits improved anti-blocking properties as a low-density olefin-based polymer.

Description

technical field [0001] [Cross Reference to Related Application] [0002] This application claims priority and benefit from Korean Patent Application No. 10-2017-0179656 filed in the Korean Intellectual Property Office on December 26, 2017, the entire contents of which are incorporated herein by reference. [technical field] [0003] The present invention relates to olefin-based polymers, and in particular, to low-density olefin-based polymers prepared using two types of transition metal compound catalysts and exhibiting excellent anti-blocking properties. Background technique [0004] Polyolefins are widely used in extrusion molded products, blow molded products and injection molded products due to their excellent moldability, heat resistance, mechanical properties, hygienic quality, water vapor permeability and appearance characteristics of molded products. However, polyolefins, especially polyethylene, have problems of low compatibility with polar resins such as nylon an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F4/6592C08F2/04
CPCC08F210/16C08L2207/064C08L2314/06C08F2420/02C08F4/65908C08F2/06C08F4/6592C08F4/65904C08F210/14C08F2500/03C08F2500/08C08F2500/12C08F2500/34C08F2500/35C08F2500/37C08F2/04C08F2500/18C08F210/18C08L23/0815
Inventor 李银精周炫珍朴仁成朴想恩裴庆馥李忠勳
Owner LG CHEM LTD
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