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Ultrahigh-molecular weight ethylene polymer powder and molded article using the ultrahigh-molecular weight ethylene polymer powder

An ultra-high molecular weight, ethylene-based technology, applied in the direction of single-component polyolefin artificial filaments, electrical components, electrochemical generators, etc., can solve the problems of resin extrusion molding processing difficulties, high molecular weight, etc.

Active Publication Date: 2019-03-15
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] By the way, these ultra-high molecular weight polyethylenes have a high molecular weight, so sometimes it becomes difficult to process resin alone by extrusion molding

Method used

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  • Ultrahigh-molecular weight ethylene polymer powder and molded article using the ultrahigh-molecular weight ethylene polymer powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0110] Hereinafter, the present invention will be described in more detail by way of examples and comparative examples, but the present invention is not limited to the following examples at all.

[0111] [Measurement method and conditions]

[0112] (1) Viscosity average molecular weight (Mv)

[0113] The viscosity-average molecular weight of the ultrahigh molecular weight ethylene-based polymer powder was determined by the method shown below in accordance with ISO1628-3 (2010). First, weigh 20 mg of ultra-high molecular weight ethylene-based polymer powder in a melting tube, replace the melting tube with nitrogen, and then add 20 mL of decahydronaphthalene (add 2,6-di-tert-butyl-4-methanol at 1 g / L Decalin based phenol) was stirred at 150° C. for 2 hours to dissolve the ultra-high molecular weight ethylene-based polymer powder. For this solution, the fall time (ts) between the marked lines was measured using a Cannon-Fenske viscometer (manufactured by Shibata Scientific Inst...

Synthetic example 1

[0182] [Catalyst Synthesis Example 1: Preparation of Solid Catalyst Component [A]]

[0183] (1) Synthesis of (A-1) vector

[0184] Into an 8 L stainless steel autoclave fully replaced with nitrogen and equipped with 8 stirring blades, 1000 mL of a hexane solution of 2 mol / L hydroxytrichlorosilane was added dropwise over 4 hours while stirring at 65°C and 120 rpm. Composed of the formula AlMg 5 (C 4 h 9 ) 11 (OC 4 h 9 ) 2 2,550 mL of a hexane solution of the indicated organomagnesium compound (corresponding to 2.68 mol of magnesium), was further stirred at 65° C. and 120 rpm for 1 hour, and the reaction was continued. After the reaction was completed, the supernatant was removed, and washed 4 times with 1800 mL of hexane. As a result of analyzing this solid ((A-1) support), the magnesium contained in 1 g of solid was 8.31 mmol.

[0185] (2) Preparation of solid catalyst component [A]

[0186] While stirring at 10°C, 110 mL of 1 mol / L titanium tetrachloride hexane solu...

Embodiment 1

[0189] (Example 1: PE1)

[0190] Hexane, ethylene, hydrogen, catalyst, and Stadis 450 (manufactured by The Associated Octel Company) were continuously supplied to a Bessel-type 300L polymerization reactor equipped with a stirring device. The polymerization temperature was maintained at 75°C using jacket cooling. Hexane was supplied at 55 L / hour. As the catalyst, a mixture of triisobutylaluminum and diisobutylaluminum hydride and a solid catalyst component [A] were used as cocatalyst components. The solid catalyst component [A] was added to the polymerizer at a rate of 0.7 g / hour, and a mixture of triisobutylaluminum and diisobutylaluminum hydride was added to the polymerizer at a rate of 9 mmol / hour. In addition, the solid catalyst component [A] and the mixture of triisobutylaluminum and diisobutylaluminum hydride were added in equal amounts each time so that the rate may become 5 L / hour. Similarly, Stadis450 was added so that the density|concentration of Stadis450 with res...

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Abstract

An ultrahigh-molecular weight ethylene polymer powder and a molded article using the ultrahigh-molecular weight ethylene polymer powder are provided. The present invention can provide an ultrahigh-molecular weight ethylene polymer powder and a molded article obtained by using the ultrahigh-molecular weight ethylene polymer powder, and the ultrahigh-molecular weight ethylene polymer powder can improve productivity while improving properties of a molded article. The ultrahigh-molecular weight ethylene polymer powder of the present invention contains an ethylene unit and / or an alpha-olefin unit having an ethylene unit and 3 or more and 8 or less carbon atoms as component units, and the viscosity average molecular weight of the ultrahigh-molecular weight ethylene polymer powder is 100,000 or more and 10,000,000 or less, the titanium element content obtained by inductively coupled plasma mass spectrometry (ICP / MS) is 20 ppm or less, and the isothermal crystallization time is less than 6 minutes. Further, the molded body of the present invention is obtained by using the ultrahigh-molecular weight ethylene polymer powder.

Description

technical field [0001] The present invention relates to ultra-high molecular weight ethylene-based polymer powder and a molded article using the ultra-high-molecular-weight ethylene-based polymer powder. Background technique [0002] Conventionally, ultra-high molecular weight olefins, especially ultra-high molecular weight polyethylene, have a higher molecular weight than general-purpose polyethylene, so they have excellent drawing processability, high strength, high chemical stability, and excellent long-term reliability. , It is used as a raw material for molded products such as microporous membranes for separators and fibers of secondary batteries represented by lead-acid batteries and lithium-ion batteries. [0003] In addition, compared with general-purpose polyethylene, ultra-high molecular weight olefins, especially ultra-high molecular weight polyethylene, are superior in various properties such as impact resistance, abrasion resistance, sliding properties, low-temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F210/08C08F110/06C08F4/645C08K5/098D01F6/46D01F1/10C08L23/08C08L23/06C08L91/06C08K5/134C08J5/18H01M2/16
CPCC08F110/06C08F210/16C08J5/18C08J2323/06C08J2323/08C08J2491/06C08K5/098C08K5/1345D01F1/10D01F6/46H01M50/411C08F210/08C08F4/6455C08F2500/18C08F2500/26Y02E60/10B29C48/08C08F2500/01C08F2500/24C08L23/0815C08L2207/068H01M10/0525
Inventor 浜田至亮
Owner ASAHI KASEI KK
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