Ultra-high molecular weight polyethylene resin and preparation method thereof

A technology of ultra-high molecular weight and polyethylene resin, which is applied in the field of polymer materials, can solve the problems of reducing the content of fine powder, achieve the effects of easy production and operation, improve the operating environment, and reduce the phenomenon of agglomeration

Active Publication Date: 2015-02-25
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the existing literature, there is no report that ultrasonic technology is applied to the preparation

Method used

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  • Ultra-high molecular weight polyethylene resin and preparation method thereof
  • Ultra-high molecular weight polyethylene resin and preparation method thereof
  • Ultra-high molecular weight polyethylene resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Preparation of ultra-high molecular weight polyethylene catalyst

[0063] Fully clean the glass flask equipped with a stirring device and a reflux condensing system with nitrogen, and then add 60ml of n-hexane, 1g of anhydrous magnesium chloride, and 5ml of n-butanol under the protection of nitrogen, at 70°C, with a stirring speed of 250 rpm , stirred at constant temperature for 0.5 hours to obtain a magnesium alkoxide compound solution; cooled to 20°C, slowly added dropwise 5ml of SiCl 4 , after the carrier magnesium chloride is precipitated, heat up to 70°C and stir for 0.5 hours; turn on the ultrasonic generator, set the frequency to 40KHz, and the power to 50W, and treat the suspension for 3 minutes; turn off the ultrasonic generator, and continue to stir at 70°C for 0.5 hours; cool to 20°C, slowly add 4ml of titanium tetrachloride, and stir at a constant temperature of 70°C for 2 hours; wash the catalyst particles with n-hexane several times, and dry to obtain ...

Embodiment 2

[0067] (1) Preparation of ultra-high molecular weight polyethylene catalyst

[0068] Adopt the same catalyst component and preparation process as in Example 1, but in the preparation process, the treatment time of the ultrasonic generator is 0.5 minutes, the frequency of the ultrasonic generator is set to 60KHz, and the power is set to 300W.

[0069] (2) Preparation of ultra-high molecular weight polyethylene resin

[0070] Using the same polymerization conditions and polymerization process as in Example 1, the polymerization results are shown in Table 1, and the product screening data are shown in Table 2.

Embodiment 3

[0072] (1) Preparation of ultra-high molecular weight polyethylene catalyst

[0073] Using the same catalyst components and preparation process as in Example 1, but in the preparation process, the processing time of the ultrasonic generator was 5 minutes, the power of the ultrasonic generator was set to 80W, and the hydrocarbon solvent was changed to heptane.

[0074] (2) Preparation of ultra-high molecular weight polyethylene resin

[0075] Using the same polymerization conditions and polymerization process as in Example 1, the polymerization results are shown in Table 1, and the product screening data are shown in Table 2.

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Abstract

The invention discloses an ultra-high molecular weight polyethylene resin and a preparation method thereof, particularly an ultra-high molecular weight polyethylene resin prepared by using an ultrasonic-treated supported titanium catalyst and a preparation method thereof, belonging to the technical field of high polymer materials. The preparation method comprises the following steps: by using an ultra-high molecular weight polyethylene catalyst as a main catalyst and alkyl aluminum as a cocatalyst, adding a polymerization solvent and an outer electron donor to carry out homopolymerization under non-hydrogen conditions by a slurry polymerization technique. The preparation method disclosed by the invention can easily implement industrialization, and has the advantages of favorable adjustability of technological conditions and high reaction kinetic stability of the catalyst. The ultra-high molecular weight polyethylene resin prepared by the method has the advantages of higher viscosity-average molecular weight and adjustable molecular weight, and effectively lowers the content of fine powder in resin granules.

Description

technical field [0001] The invention relates to an ultra-high-molecular-weight polyethylene resin and a preparation method thereof, belonging to the technical field of polymer materials, in particular to an ultra-high-molecular-weight polyethylene resin produced by a supported titanium series catalyst treated with ultrasonic waves and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) refers to a linear structure polyethylene with a viscosity average molecular weight of more than 1.5 million. Its average molecular weight is more than ten times that of conventional high-density polyethylene (HDPE). Impact resistance, high wear resistance, high corrosion resistance, self-lubrication, high comprehensive temperature resistance, good noise reduction performance, good stress cracking resistance, and compliance with hygienic standards. Due to its unique performance advantages, UHMWPE is widely used in many fields such as t...

Claims

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Application Information

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IPC IPC(8): C08F110/02C08F4/658C08F4/651C08F4/649C08F4/646
Inventor 李晓庆毕晓龙周建勇李文义李留忠于永玲严婕齐立芳徐晓李功韬范大鹏
Owner CHINA PETROLEUM & CHEM CORP
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