Ultra-high molecular weight polyethylene composition and process method for producing an ultra-high molecular weight polyethylene composition tubular product

An ultra-high molecular weight, high-density polyethylene technology, applied in the direction of pipes/pipe joints/fittings, pipes, rigid pipes, etc., can solve the problems of difficult molding, high viscosity, low viscosity fluidity, mechanical strength and softening temperature, etc. Achieve the effect of good mechanical properties and small linear expansion coefficient

Active Publication Date: 2014-09-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention aims at the problems of high viscosity, poor fluidity, difficult molding and slow extrusion of ultra-high molecular weight polyethylene in the prior art, and provides an ultra-high molecular weight polyethylene composition with low viscosity, high fluidity, high mechanical strength and softening temperature

Method used

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  • Ultra-high molecular weight polyethylene composition and process method for producing an ultra-high molecular weight polyethylene composition tubular product

Examples

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Effect test

Embodiment 1

[0042] Measure 100 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 5 million, 10 parts of polyethylene wax with a molecular weight of 5000, 40 parts of high-density polyethylene with a molecular weight of 500,000, and 50 parts of ultra-high molecular weight polyethylene with a molecular weight of 11 million. 3 parts, 3 parts of calcium stearate and zinc stearate with a mass ratio of 1:1, polyimide, polytrimethylene terephthalate and polyethylene terephthalate with a mass ratio of 1:1:1 10 parts of a mixture of alcohol esters, 2 parts of a mixture of fumed silica and sodium benzoate at a mass ratio of 1:1, 0.5 parts of a compound of phenolic antioxidants and phosphite antioxidants at a mass ratio of 3:2 share. Before mixing, dry the ultra-high molecular weight polyethylene in a drying oven at 120°C for 10 hours, and cool to room temperature in a dry atmosphere, then put the above components in a high-speed stirrer, and stir at room...

Embodiment 2

[0044] Measure 100 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 3 million, 0.5 part of polyethylene wax with a molecular weight of 1000, 10 parts of high-density polyethylene with a molecular weight of 100,000, and ultra-high molecular weight polyethylene wax with a viscosity-average molecular weight of 8 million. 20 parts of ethylene, 0.5 parts of calcium stearate and zinc stearate in a mass ratio of 1:1, polyimide, polytrimethylene terephthalate and polyterephthalic acid in a mass ratio of 1:1:1 1 part of a mixture of ethylene glycol esters, 0.5 parts of a mixture of fumed silica and sodium benzoate at a mass ratio of 1:1, a compound of phenolic antioxidants and phosphite antioxidants at a mass ratio of 3:2 0.8 parts. Before mixing, place the ultra-high molecular weight polyethylene in a drying oven at 120°C for 12 hours, and cool to room temperature in a dry atmosphere, then put the above components in a high-speed stirrer, ...

Embodiment 3

[0046] Measure 100 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 3.5 million, 5 parts of polyethylene wax with a molecular weight of 3000, 25 parts of high-density polyethylene with a molecular weight of 300,000, and ultra-high molecular weight polyethylene wax with a viscosity-average molecular weight of 9.5 million. 35 parts of ethylene, 2 parts of calcium stearate and zinc stearate in a mass ratio of 1:1, polyimide, polytrimethylene terephthalate and polyterephthalic acid in a mass ratio of 1:1:1 5.5 parts of a mixture of ethylene glycol esters, 1.3 parts of a mixture of fumed silica and sodium benzoate at a mass ratio of 1:1, a compound of a phenolic antioxidant and a phosphite antioxidant at a mass ratio of 3:2 1 serving. Before mixing, place the ultra-high molecular weight polyethylene in a drying oven at 120°C for 12 hours, and cool to room temperature in a dry atmosphere, then put the above components in a high-speed sti...

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Abstract

The invention relates to an ultra-high molecular weight polyethylene composition with the advantages of low melt viscosity, good flowability and high mechanical strength and softening temperature and a process method for producing an ultra-high molecular weight polyethylene composition tubular product. The composition comprises the following components in parts by mass: 100 parts of ultra-high molecular weight polyethylene of which the viscosity-average molecular weight is 3000000-5000000, 0.5-10 parts of polyethylene wax of which the molecular weight is 1000-5000, 10-40 parts of high-density polyethylene of which the molecular weight is 100000-500000, 20-50 parts of ultra-high molecular weight polyethylene of which the molecular weight is 8 millions-11 millions, 0.5-3 parts of a lubricant, 1-10 parts of a filling enhancer, 0.5-2 parts of nucleating agent, and 0.1-2 parts of a compound antioxidant. According to the invention, problems of high viscosity, poor flowability and difficulty in processing of the ultra-high molecular weight polyethylene melt in the prior art solved.

Description

technical field [0001] The invention relates to the field of ultra-high molecular weight compositions, in particular to an ultra-high molecular weight polyethylene composition and a process for producing pipes of the composition. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) generally refers to high-density polyethylene with a viscosity average molecular weight greater than 1 million (IUPAC). Due to its extremely large molecular weight, special linear structure and good molecular weight regularity and alignment, ultra-high molecular weight polyethylene resin has excellent comprehensive properties that other engineering plastics do not have, including excellent resistance to friction and wear, Impact, corrosion resistance, low temperature resistance, pressure resistance, stress crack resistance, swelling resistance, scaling resistance, self-lubricating and non-adhesive, etc. Therefore, ultra-high molecular weight polyethylene has been widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L79/08C08L67/02C08K13/02C08K3/36C08K5/098B29C47/92F16L9/12B29C48/92
CPCB29C2947/92619B29C47/385B29C2947/92714B29C47/0023B29C2947/92628B29C2947/926B29C47/92B29C2947/92647B29C48/09B29C48/397B29C48/92B29C2948/926B29C2948/92619B29C2948/92628B29C2948/92647B29C2948/92704B29C2948/92714C08L23/06C08L2201/08C08L2203/18C08L2205/025C08L2205/035C08L2207/062C08L2207/068C08L79/08C08L67/02C08K13/02C08K3/36C08K5/098
Inventor 王志明石建设纪艳娟石国军袁月李翠
Owner CHINA PETROLEUM & CHEM CORP
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