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Polyethylene material and polyethylene pipe

A technology of polyethylene and high-density polyethylene, applied in the field of polymer materials, can solve problems such as unstable pipe quality, affecting pipe quality, and difficulty in uniform dispersion, so as to improve anti-sag performance, improve overall performance, and increase the degree of dispersion Effect

Active Publication Date: 2020-09-01
中化石化销售有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the existing anti-sag polyethylene pipes, there are PE100 special materials and chemical cross-linking solutions, but the former is more expensive, and the latter is prone to local gelation that affects the quality of the pipe.
[0003] In addition, the compatibility of carbon black in HDPE black pipes and HDPE matrix resin is very poor, and carbon black particles are difficult to Uniform dispersion not only affects the appearance of the pipe, but also leads to unstable pipe quality and shortened service life

Method used

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  • Polyethylene material and polyethylene pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 prepares polyethylene material by following method:

[0062] Add POSS, malonic acid, glycerol, and 4-dimethylaminopyridine into the reaction vessel at a molar ratio of 0.1:1:1:0.001, protect with nitrogen, heat up, melt and stir for 4 hours, the reaction temperature is 120°C, and stir Speed ​​1000rpm. Add MDI by 1% of glycerol molar number, continue to react for 2h, obtain hyperbranched polyester. After drying the microcrystalline cellulose at 80° C. for 4 hours, it is directly added to the above-mentioned reaction vessel and subjected to vacuuming for 2 hours to obtain the cellulose modified by hyperbranched polyester.

[0063] Simultaneously, the reaction temperature and stirring speed remained unchanged. Weigh polyethylene resin, carbon black masterbatch, KH560 and cellulose modified by hyperbranched polyester according to the mass ratio of 100:5:0.1:1, mix them evenly, and then process granulation through twin-screw extrusion. The twin-screw extrusio...

Embodiment 2

[0066] The experimental process is basically the same as in Example 1, the difference is that: KH560 is adjusted to 2% of the polyethylene resin mass, the carbon black content in the carbon black masterbatch is adjusted to 45%, and the high-density polyethylene is adjusted to be 190 ° C and a pressure of 5 kg The melt index under the condition is 0.3g / 10min.

[0067] The carbon black dispersion grade of the final compound was 2.5.

Embodiment 3

[0069] The experimental process is basically the same as in Example 1, the difference is that the addition of hyperbranched polyester modified cellulose is 5% of the polyethylene resin quality, the carbon black content in the carbon black masterbatch is adjusted to 30%, and the high-density polyethylene The melt index is 0.03g / 10min at 190°C and a pressure of 5kg.

[0070] The carbon black dispersion grade of the final compound was 2.5.

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Abstract

The invention provides a polyethylene material and a polyethylene pipe. The polyethylene material provided by the invention contains cellulose modified with hyperbranched polyester, and the hyperbranched polyester is hyperbranched polyester containing polyhedral oligomeric silsesquioxane. In addition, the polyethylene material also contains carbon black master batch, a coupling agent and high-density polyethylene. The polyethylene pipe prepared from the polyethylene material has the advantages of uniform carbon black dispersion, high wall thickness, large pipe diameter, stable quality and longservice life.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to the field of plastic pipes, in particular to a polyethylene material and a polyethylene pipe. Background technique [0002] Sag resistance refers to the ability of a polymer melt to bear its own weight. The anti-sagging performance of polyethylene resin directly determines the pipe diameter and wall thickness in the quality index of pipes. How to produce polyethylene pipes with thicker pipe walls and larger pipe diameters is the key to the product transformation of enterprises. Among the existing anti-sag polyethylene pipes, there are PE100 special materials and chemical cross-linking solutions, but the former is more expensive, and the latter is prone to local gelation that affects the quality of the pipe. [0003] In addition, the compatibility of carbon black in high-density polyethylene black pipes with high-density polyethylene matrix resin is very poor. It is difficult for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L87/00C08K3/04C08K5/5435C08G81/00
CPCC08L23/06C08G81/00C08L2203/18C08L87/005C08K3/04C08K5/5435
Inventor 李波梁胜轲金华王武聪杜中杰孙佩鑫侯斌
Owner 中化石化销售有限公司
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