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Laminated silicate modified double-peak high-density polytene winding pipe materials

A technology of high-density polyethylene and layered silicate, which is applied in the processing and manufacturing of winding pipes, can solve the problems of unsatisfactory performance, poor environmental stress resistance, ring stiffness, wear resistance and toughness, etc., and achieve Reduced melt viscosity, guaranteed dispersion and peeling, and improved processability

Inactive Publication Date: 2005-07-27
成都正光纳米科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor environmental stress resistance of unimodal high-density polyethylene, especially domestic unimodal high-density polyethylene, ring stiffness, wear resistance and toughness are not ideal
In order to improve its comprehensive performance, it has been tried to use ultra-fine talcum powder and thermoplastic elastomer (Liu Boyuan, "The development and application of the third generation of large-diameter double-wall corrugated pipe reinforcement and toughening masterbatch", "Plastic Processing", 2004, 39( 1), 33-38), linear low-density polyethylene (Wang Cheng's research on blended modified polyethylene pipe material', "Plastic Science and Technology", 1999, 08, p5), etc., although some effects have been achieved , but due to the performance limitation of the unimodal high-density polyethylene matrix resin itself, it is still not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 110 kg of water to 2 kg of sodium montmorillonite, disperse evenly, stir at high speed for 30 minutes, heat to 80°C, add cetyl trimethyl ammonium chloride aqueous solution (1.8 kg of cetyl trimethyl chloride) Ammonium dissolved in 26 kg of water), keep warm for 1 hour, filter with suction, wash with water until there is no chloride ion, add it to the mixer after drying, stir slowly at a speed of 40 rpm, and slowly spray an equal amount of ethylene 5% ethanol solution of base-R-methoxysilane (R is an alkyl group with 3 to 12 carbon atoms), stirred slowly at 40°C for 15 minutes, cooled, unloaded, and packaged.

Embodiment 2

[0014] The organic montmorillonite prepared by 5 kilograms of embodiment 1 and 0.25 kilogram of polyethylene oxide were added to a high-speed mixer and mixed at a high speed for 3 minutes to make a uniform premix, and then mixed evenly with 25 kilograms of bimodal high-density polyethylene. Put it into a twin-screw extrusion granulator, raise the temperature to 200°C, adjust the rotation speed to 300 rpm, carry out the intercalation stripping and dispersion of the organic montmorillonite, and finally extrude, draw, cool, and granulate.

Embodiment 3

[0016] 10 kg of organic montmorillonite prepared in Example 1 and 0.5 kg of ethylene-propylene copolymer were added to a high-speed mixer and mixed at high speed for 3 minutes to make a uniform premix, which was then mixed with 25 kg of bimodal high-density polyethylene Evenly, put it into a twin-screw extrusion granulator, raise the temperature to 200°C, adjust the rotation speed to 350 rpm, perform intercalation, stripping and dispersion of organic montmorillonite, and finally extrude, draw, cool, and granulate.

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Abstract

A laminated silicate modified doublet high-density polyethylene winding piping material is used for wind pipe with high environmental stress cracking resistant performance. The production is carried out by taking doublet high-density polyethylene, cetane trimethyl-salmiac and vinyl-R-methoxyl-silane (R is alkyl with 3-12 atom) treating, and melting composite modifying. It achieves improvement of abrasive-resistant, roughness and machining performance.

Description

technical field [0001] The invention relates to a layered silicate-modified bimodal high-density polyethylene material, which is especially suitable for processing and manufacturing winding pipes with high requirements on environmental stress cracking resistance and ring rigidity. technical background [0002] High-density polyethylene winding pipe has the characteristics of no pollution, corrosion resistance (adaptable to acid-base liquids with a concentration below 10%), low energy consumption, light weight, easy installation, large flow rate, long life, and excellent impact resistance. It has developed rapidly in recent years, and there is a tendency to gradually replace pipes made of high energy consumption materials (such as cement, cast iron, ceramics, etc.), and become the main product of drain pipes and sewage pipes. At present, unimodal high-density polyethylene is mainly used as the basic raw material at home and abroad to manufacture high-density polyethylene wind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08L23/06
Inventor 吴廷禄刘忠仁薛合伦肖雪莫敬源
Owner 成都正光纳米科技有限公司
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