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Special high-density polyethylene resin for pressure-resistant pipes and preparation method of special high-density polyethylene resin

A technology of high-density polyethylene and polyethylene resin, which is applied in the field of high-density polyethylene resin for pressure-resistant pipes and its preparation, can solve problems such as the difficulty of pressure-resistant performance to meet the requirements, and achieve the increase of nominal strain at tensile fracture and tensile strength. The effect of increasing tensile yield stress and high heat resistance

Pending Publication Date: 2022-03-04
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the problem that the existing high-density polyethylene is difficult to meet the requirements of the pressure resistance when it is applied to pipes, the purpose of the present invention is to provide a high-density polyethylene resin for pressure-resistant pipes with excellent pressure resistance, which can endow polyethylene with The pipe has excellent comprehensive properties such as high heat resistance, high strength, high modulus, and high fracture toughness, which in turn improves its resistance to slow crack growth and environmental stress cracking resistance, etc., and expands the application field of pipes.

Method used

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  • Special high-density polyethylene resin for pressure-resistant pipes and preparation method of special high-density polyethylene resin
  • Special high-density polyethylene resin for pressure-resistant pipes and preparation method of special high-density polyethylene resin
  • Special high-density polyethylene resin for pressure-resistant pipes and preparation method of special high-density polyethylene resin

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Effect test

Embodiment 1

[0038] The raw material of the special high-density polyethylene resin for pressure-resistant pipes of the present embodiment includes the following quality components: 70kg high-density polyethylene resin-1, 10kg konjac flour-1, 5kg stevioside-1, 5kg cyclohexyl acetophenone, 0.3 kg vinyltrimethoxysilane, 0.3kg dicumyl peroxide, 0.10kg diaryl secondary amine, 0.10kg dilauryl thiodipropionate, 0.08kg calcium stearate, 0.02kg fluoroelastomer.

[0039] Its preparation method includes the following steps: take each raw material according to the selected quality and add it to a high-speed mixer for 50r / min and mix it uniformly for 2 hours, then add the uniformly mixed material into a special extruder to extrude and granulate, and the temperature of the extruder is 180 ℃, the screw speed is 150r / min, and the high-density polyethylene resin, which is a special material for pressure-resistant pipes, is obtained.

Embodiment 2

[0041] The raw material of the special high-density polyethylene resin for pressure-resistant pipes of the present embodiment includes the following quality components: 80kg high-density polyethylene resin-1, 15kg konjac flour-1, 10kg stevioside-1, 8kg cyclohexyl acetophenone, 0.6 kg vinyltrimethoxysilane, 0.6kg dicumyl peroxide, 0.16kg diaryl secondary amine, 0.15kg dilauryl thiodipropionate, 0.13kg calcium stearate, 0.03kg fluoroelastomer.

[0042] Its preparation method comprises the following steps: taking each raw material according to the selected quality and adding it into a high-speed mixer at 50r / min for uniform mixing for 2 hours, adding the uniformly mixed material into a special extruder for extruding and granulating, and the temperature of the extruder is 200 ℃, the screw speed is 120r / min, and the high-density polyethylene resin, which is a special material for pressure-resistant pipes, is obtained.

Embodiment 3

[0044] The raw material of the special high-density polyethylene resin for pressure-resistant pipes of the present embodiment includes the following quality components: 75kg high-density polyethylene resin-1, 13kg konjac flour-1, 8kg stevioside-1, 7kg cyclohexyl acetophenone, 0.5 kg vinyltriethoxysilane, 0.4kg bis-tert-butylperoxycumene, 0.12kg ketone-amine condensation product, 0.12kg dilauryl thiodipropionate, 0.10kg calcium stearate, 0.02 kg fluoroelastomer.

[0045] Its preparation method comprises the following steps: taking each raw material according to the selected quality and adding it into a high-speed mixer at 50r / min for uniform mixing for 2 hours, adding the uniformly mixed material into a special extruder for extruding and granulating, and the temperature of the extruder is 200 ℃, the screw speed is 120r / min, and the high-density polyethylene resin, which is a special material for pressure-resistant pipes, is obtained.

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Abstract

The invention provides a special material high-density polyethylene resin for a pressure-resistant pipe and a preparation method of the special material high-density polyethylene resin. The special material high-density polyethylene resin for the pressure-resistant pipe is prepared from the following raw materials through reaction: high-density polyethylene resin, konjaku flour, stevioside, cyclohexyl acetophenone, a cross-linking agent, a cross-linking auxiliary agent, a main antioxidant, an auxiliary antioxidant, a halogen absorbent and a processing auxiliary agent. The special high-density polyethylene resin for the pressure-resistant pipe has high heat resistance, high strength, high modulus and high fracture toughness, and particularly, the pressure resistance necessary for the pipe is greatly improved, so that the pressure-resistant ductility such as slow crack growth resistance, environmental stress cracking resistance and the like of the pipe are improved, and the application field of the pipe is widened.

Description

technical field [0001] The invention belongs to the field of polymer material modification, and in particular relates to a special high-density polyethylene resin for pressure-resistant pipes and a preparation method thereof. Background technique [0002] In recent years, with the advancement of domestic shantytown transformation and the demand for lightweight materials, polyethylene pipes have become more and more widely used due to their outstanding corrosion resistance, wear resistance, no pollution to the conveying medium, and long service life. It is widely used in gas transmission, water supply, sewage discharge, mine fine particle solid transportation and other fields. The expansion of application fields and the specialization of customer needs require polyethylene pipes to have better pressure bearing capacity, resistance to rapid crack growth and resistance to slow crack growth, and put forward higher requirements for the performance of pipe special resins . [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L5/00C08K5/1545
CPCC08L23/06C08L2203/18C08L2207/062C08L2201/08C08L5/00C08K5/1545
Inventor 蓝程程徐彦龙李允升李胜龙张建新朱文俊喻啸晨高晴晴张宏科
Owner WANHUA CHEM GRP CO LTD
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