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Polyethylene resin for secondary battery separator, method for manufacturing same and separator using same

A polyethylene resin and secondary battery technology, applied in the field of polyethylene resin, can solve problems such as difficult to achieve uniform melting of extruders, and achieve the effect of ensuring mechanical properties

Pending Publication Date: 2022-05-17
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it may be difficult to achieve uniform melting in the extruder

Method used

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  • Polyethylene resin for secondary battery separator, method for manufacturing same and separator using same
  • Polyethylene resin for secondary battery separator, method for manufacturing same and separator using same
  • Polyethylene resin for secondary battery separator, method for manufacturing same and separator using same

Examples

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preparation example Construction

[0045] Preparation of catalysts for polyethylene polymerization

[0046] A catalyst for polyethylene polymerization according to an embodiment of the present invention is prepared by including the following steps: a first step, wherein a magnesium compound solution is prepared by reacting a magnesium compound, an alcohol, and a hydrocarbon solvent; adding titanium tetrachloride to a magnesium compound solution and reacting to prepare a precursor; and a third step in which a catalyst is prepared by reacting the precursor with titanium tetrachloride and a carbonyl compound.

[0047] The magnesium compound may be a magnesium halide compound, such as magnesium chloride, such as magnesium dichloride (MgCl 2 ).

[0048] The hydrocarbon solvent may be an aliphatic hydrocarbon having 1 to 20 carbon atoms such as pentane, hexane, heptane, octane, decane, and kerosene, or an alicyclic hydrocarbon such as cyclopentane, methylcyclopentane, cyclopentane, Hexane and methylcyclohexane, or...

Embodiment 1

[0132] [Preparation of solid catalyst for polyethylene polymerization]

[0133] Step 1: Preparation of Magnesium Halide Compound Solution

[0134] After replacing the 1L-reactor equipped with a mechanical stirrer with a nitrogen atmosphere, 25 g of magnesium dichloride (MgCl 2), 300 ml of toluene and 100 ml of n-butanol, and the temperature was raised to 65° C. for 1 hour while stirring, and then kept for 2 hours, thereby obtaining a uniform magnesium halide compound solution.

[0135] Step 2: Preparation of solid composite titanium catalyst

[0136] After cooling the temperature of the solution prepared in the first step to 40 °C, slowly inject 70 ml of TiCl 4 , for 1 hour. When the injection was complete, the mixture was stirred at 350 rpm, the temperature of the reactor was raised to 60 °C for 1 hour, and aged for an additional 1 hour. When all the processes were completed, the reactor was allowed to stand to completely settle the solid components to remove the supernat...

Embodiment 2

[0153] The catalyst was prepared in the same manner as in Example 1. Polymerization was performed under the same polymerization conditions as in Example 1, except that the amount of hydrogen injected into the first polymerization reactor in Example 1 was changed to 10 g / h. A porous film was formed under the same molding conditions as in Example 1.

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Abstract

The present invention relates to a polyethylene resin for a separator capable of exhibiting excellent extrusion processability while ensuring excellent mechanical strength of a porous separator as a molded product, a method for manufacturing the same, and a separator for a secondary battery using the same. The polyethylene resin is a single particle and has a melting point exhibiting two peaks, wherein the first peak is in the range of 125 DEG C to 132 DEG C and the second peak is in the range of 133 DEG C to 136 DEG C.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2020-0153752 filed in the Korean Intellectual Property Office on November 17, 2020, the contents of which are hereby incorporated by reference in their entirety. technical field [0003] The present invention relates to a polyethylene resin for a separator, a method for producing the same, and a separator using the same. Background technique [0004] Ultra-high molecular weight polyethylene (UHMWPE) usually refers to a molecular weight of 10 6 Polyethylene above g / mol, and can be divided into molecular weight of 3×10 6 Polyethylene above g / mol (which is called UHMWPE) and molecular weight less than 3×10 6 g / mol of polyethylene (known as very high molecular weight polyethylene (VHMWPE)). Compared with general-purpose polyethylene, UHMWPE resin has excellent characteristics in terms of stiffness, wear resistance, environmental stress, u...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/06H01M50/417H01M50/489
CPCC08F210/16H01M50/417H01M50/489C08F2500/05C08F2500/24C08F210/06C08J5/18C08J2323/06H01M50/449Y02E60/10C08F2/001C08F110/02C08F2500/34C08F2500/07C08F2500/26C08F10/02C08F4/6545C08F4/651H01M50/411C08F210/08C08F2/01C08L23/06C08L23/0815C08L23/16C08F2500/18
Inventor 韩在爀朴垠珍李镇佑康美贤朴智溶
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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