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Composite auxiliary agent for high-density polyethylene pressure-resistant pipes, preparation method thereof, and resin raw material containing the same

A technology of high-density polyethylene and composite additives, applied in the field of high-density polyethylene pressure-resistant pipe resin raw materials, can solve the problems of rough inner surface of the pipe, harsh safety performance, uneven thickness of the pipe wall, etc., and improve the poor appearance of the pipe , Improve processing performance, good rigidity and toughness balance effect

Active Publication Date: 2018-08-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the processing is relatively difficult, and it is easy to cause problems such as uneven thickness of the pipe wall, shark skin on the outer wall of the pipe, and rough inner surface of the pipe.
Moreover, since such pipes are mostly used in water supply, gas transmission and other fields, they need to withstand certain pressure and environmental aging during use, thus putting forward very strict requirements for their safety performance.

Method used

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  • Composite auxiliary agent for high-density polyethylene pressure-resistant pipes, preparation method thereof, and resin raw material containing the same
  • Composite auxiliary agent for high-density polyethylene pressure-resistant pipes, preparation method thereof, and resin raw material containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 100g tetrakis(3-(3',5'-di-tert-butyl-4'-hydroxyphenyl) propionate) pentaerythritol ester (ie, bisphenol antioxidant 1010), 80g tris(2,4-di-tert Butyl) phenyl phosphite (trade name: Mark2112), 60g of calcium stearate, 6g of fluoroelastomer Viton FFGB ​​(manufactured by DuPont) were added to the mixer, mixed for 5 minutes at room temperature, then fed into the powder for extrusion Machine, forced extrusion at room temperature to obtain granular composite additives (GC-1).

Embodiment 2

[0044] 100g tetrakis(3-(3',5'-di-tert-butyl-4'-hydroxyphenyl) propionate) pentaerythritol ester, 100g tris(2,4-di-tert-butyl) phenyl phosphite, 60g hard Calcium fatty acid, 7g fluoroelastomer Viton FFGB ​​(manufactured by DuPont) join in the mixer, after mixing at room temperature for 10 minutes, send into the powder extruder, forced extrusion at room temperature, obtain granular composite auxiliary agent (GC -2).

Embodiment 3

[0046] 100g tetrakis(3-(3',5'-di-tert-butyl-4'-hydroxyphenyl) propionate) pentaerythritol ester, 120g tris(2,4-di-tert-butyl) phenyl phosphite, 60g hard Calcium fatty acid, 8 grams of fluoroelastomer Viton FFGB ​​(manufactured by DuPont) join in the mixer, after mixing at room temperature for 20 minutes, send into powder extruder, under room temperature forced extrusion, obtain granular composite auxiliary agent ( GC-3).

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Abstract

The invention provides a composite auxiliary agent for a high density polyethylene overpressure resistant tubing. The composite auxiliary agent comprises 30-50 parts by weight of a long-term ageing resistant auxiliary agent , 10-30 parts by weight of a thermal stable auxiliary agent, and 10-30 parts by weight of a processing auxiliary agent, wherein the long-term ageing resistant auxiliary agent is at least one selected from a group consisting of hindered phenols antioxidants, amines antioxidants, and phosphorus antioxidants; the thermal stable auxiliary agent is at least one selected from metal soap stabilizers; and the processing auxiliary agent comprises at least a fluoroelastomer. The invention also provides a preparation method of the composite auxiliary agent, and a high density polyethylene overpressure resistant tubing resin raw material containing the composite auxiliary agent. The high density polyethylene overpressure resistant tubing resin raw material containing the composite auxiliary agent has excellent processing performance. The formed tubing has excellent environmental stress crack resistance, ageing resistance, and rigidity-toughness balance.

Description

technical field [0001] The invention relates to a composite auxiliary agent for high-density polyethylene pressure-resistant pipes, a preparation method thereof, and a high-density polyethylene pressure-resistant pipe resin material containing the composite auxiliary agent. Background technique [0002] Polyethylene pipes have outstanding chemical corrosion resistance, low temperature resistance, heat and wear resistance, excellent welding characteristics, no pollution to the conveying medium, long service life, and low manufacturing and installation costs. They are currently widely used in gas transmission and water supply. , sewage, heating, petrochemical and electronic communications and other fields. [0003] The development of polyethylene pipes has a history of more than 50 years, and its development is usually divided into three stages. The first stage began in the 1950s. In this stage, the first generation of high-density polyethylene (High Density Polyethylene, HDP...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/134C08K5/526C08K5/098C08L27/12C08L23/06C08L23/08
Inventor 王华宋磊杨勇张瑞高宇新韦德帅方宏李岩王世华王斯晗姜进宪邹恩广安彦杰张德英肖展王尧于波李冬霞张明强葛腾杰王文燕李波张丽丽高晓宇姜晓强张绪华梁利伟田炳权姜丽丽
Owner PETROCHINA CO LTD
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