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Modified polyethylene and preparation method thereof

A polyethylene and polyethylene-based technology, which is applied in the field of modified polyethylene, can solve the problems that the tensile strength and impact toughness of materials are difficult to meet at the same time, the melt flow rate is unstable, and the purity of polyethylene is high, so as to meet the requirements of hollow blowing. Plastic process and follow-up product performance requirements, wide range of equipment use, and wide range of performance adjustments

Inactive Publication Date: 2018-03-27
GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has problems such as difficulty in controlling the degree of crosslinking, unstable melt flow rate, high purity requirements for polyethylene in recycled materials, and difficulty in meeting the tensile strength and impact toughness of materials at the same time.

Method used

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  • Modified polyethylene and preparation method thereof
  • Modified polyethylene and preparation method thereof
  • Modified polyethylene and preparation method thereof

Examples

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Effect test

preparation example Construction

[0025] Before describing the preparation method of the present invention, the present invention provides a description of the relevant structure of the twin-screw extrusion equipment designed in the present invention.

[0026] Such as figure 1 As shown, the twin-screw extruder is divided into 1-solid conveying section, 2-melting section A, 3-vacuum port A, 4-vacuum port B, 5-side feeding A, 6 from the feed port to the discharge port. - Side feeding B, 7- Melting section B, 8- Vacuum port C, 9- Homogenization and melt conveying section.

Embodiment 1

[0028] A modified polyethylene prepared from the following raw materials in weight percent:

[0029] 80% polyvinyl waste recycled materials, 0.25% 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, 0.6% bis-(4-methylbenzoyl) peroxide 0.05% 2,2-thiobis(4-tert-octylphenoxy)nickel, 0.12% 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 7.5 % EPDM, 10% glass flakes, 0.5% tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol, 0.28% 1,1, 3-Tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, 0.7% of N,N'-ethylenebisstearamide.

[0030] The specific preparation method is as follows:

[0031] Mix polyethylene-based waste recycled materials, cross-linking agents and processing aids uniformly and then feed them into the twin-screw extruder from the main feeding port, mix the antioxidant and some reinforcement modifiers uniformly and then add them from side feeder A, and then The remaining reinforcement modifier and stabilizer are mixed evenly and then added from side feeder B,...

Embodiment 2

[0046] A modified polyethylene prepared from the following raw materials in weight percent:

[0047] 73% polyvinyl waste recycled materials, 0.7% dicumyl peroxide, 0.1% bis-(4-methylbenzoyl) peroxide, 0.15% tris(1,2,2,6 , 6-pentamethylpiperidinyl) phosphite, 0.15% resorcinol monobenzoate, 10% ethylene-vinyl acetate copolymer EVA, 15% attapulgite, 0.1% β-(3, 5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, 0.5% dioctadecyl pentaerythritol diphosphite, 0.2% zinc stearate, 0.2% white mineral oil.

[0048] Concrete preparation method is identical with embodiment 1.

[0049] The control air pressure at vacuum port A is -0.055MPa, the control air pressure at vacuum port B is -0.076MPa, and the control air pressure at vacuum port A is -0.045MPa.

[0050] Extruder The speed of twin-screw extruder is 300r / min, and the temperature setting and screw combination of different functional areas during the reactive extrusion process are as follows:

[0051]

[0052]

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Abstract

The invention discloses modified polyethylene and a preparation method thereof, aiming at providing the modified polyethylene which is prepared from a polyethylene-based waste recycled material and has high tensile strength and good impact toughness. The modified polyethylene is prepared from the following components: 60 percent to 85 percent of the polyethylene-based waste recycled material, 0.01percent to 5 percent of a cross-linking agent, 0.1 percent to 0.5 percent of a stabilizer, 10 percent to 35 percent of an enhanced modifier, 0.1 percent to 1.5 percent of an antioxidant and 0.1 percent to 3 percent of a processing modifier; the sum of all the components is 100 percent.

Description

technical field [0001] The invention discloses a modified polyethylene, in particular to a method for preparing modified polyethylene from polyethylene-based waste recycled materials. Background technique [0002] The rapid development of polymer materials has provided great convenience for people's daily life. As the simplest polymer, polyethylene is mainly obtained by high-temperature cracking of light oil and ethane to obtain ethylene, which is further formed by addition polymerization. Its output is a sign to measure the development level of petrochemical industry and even the entire chemical industry. With the large-scale application of polyethylene materials, some problems have gradually emerged: ethylene is processed and prepared from petroleum, and the life cycle of polyethylene products is short, and it is difficult to degrade and disappear when discarded in nature. After a large amount of waste, it will cause "white pollution" "Simple landfill or incineration trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/16C08L23/08C08L91/06C08L53/02C08L23/28C08K13/04C08K7/00C08K3/40C08K5/14C08K5/20C08K13/02C08K3/34C08K5/098C08K5/524C08K5/132C08K7/28C08K3/26B29B9/06B29B17/00
CPCB29B9/06B29B17/00C08K2201/014C08L23/06C08L2205/025C08L2205/035C08L2207/068C08L2207/20C08L23/16C08K13/04C08K7/00C08K3/40C08K5/14C08K5/20C08L23/0853C08L91/06C08K13/02C08K3/346C08K5/098C08K5/524C08L53/025C08K5/132C08K3/34C08L23/286C08K7/28C08K3/26Y02W30/62
Inventor 甄智勇朱永祥唐孝芬吴浪赖建明杜惠娟钟璐
Owner GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD
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