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Polyolefin resin composition for pipe

A technology of polyolefin resin and resin composition, which is applied in the field of resin composition for micro-crosslinked modified polyethylene pipes, can solve the problems of unavailable price and grade, limited use range, complicated technology, etc., so as to reduce safety problems and avoid The effect of excessive cross-linking or insufficient cross-linking and reasonable dosage

Inactive Publication Date: 2011-12-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ESCR of PE63 grade resin is less than 1000 hours, so the scope of use is limited, and the price and grade cannot compete with PE80 and PE100 grade resin for pipes
The ESCR of PE80, PE100 or higher polyethylene pipe resins exceeds 1000 hours, but the resin is directly obtained from the polymerization reaction, which is complicated in technology and high in cost.

Method used

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  • Polyolefin resin composition for pipe
  • Polyolefin resin composition for pipe
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] 1 raw material

[0025] resin

HDPE

ULDPE

MFR, g / 10min

0.17

1.5

ρ, g / cm 3

0.945

0.880

ESCR / hr

338

1460

manufacturer

China Petroleum

Jilin Petrochemical Company

ExxonMobil

company

[0026] Tert-Butyl Hydroperoxide Half-life T=264℃ / 1min, Lanzhou Auxiliary Factory

[0027] 2,5-Dimethyl-2,5-di-tert-butylperoxyhexane, half-life T=186℃ / 1min, Lanzhou Auxiliary Factory

[0028] Antioxidant B561 (1:4 compound mixture of antioxidant 1010 and antioxidant 168) Ciba, Switzerland

[0029] Zinc Stearate Chongqing Changjiang Chemical Plant

[0030] 2 performance test standard

[0031] Melt flow rate MFR (g / 10min) GB / T3682-2000

[0032] Density (g / cm 3 )GB / T1033-1986

[0033] Resistance to environmental stress cracking (h) GB / T 1842-2008

[0034] Tensile strength (MPa) GB / T 2567-2008

[0035] Izod impact strength (J / m) GB / T 1843-2008

[0036] 3 Equipment and inst...

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PUM

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Abstract

A polyolefin resin composition for pipes, comprising: 100% high-density polyethylene, melt flow rate 0.1-0.5g / 10min, density 0.945-0.957g / cm3; 2) 10%-30% ultra-low density polyethylene, melt flow rate 0.1-20g / 10min, density 0.860-0.900g / cm3; 3) 0.1%-0.30% peroxide modifier. The composition undergoes a micro-crosslinking reaction through a reactive extrusion process, which improves the environmental stress cracking resistance (>2000 hours) of the high-density polyethylene, and expands the application of the high-density polyethylene in pipes or other fields. The invention further discloses a preparation method of the resin composition.

Description

Technical field [0001] The invention relates to a polyolefin resin composition for pipes, in particular to a resin composition for micro-crosslinked modified polyethylene pipes. Background technique [0002] In recent years, with the development of the plastics industry, polyethylene pipes have attracted more and more attention due to their light weight, corrosion resistance, low thermal conductivity, good insulation performance, convenient construction, installation and maintenance, and have become the next PVC pipe. , the world's largest consumption of plastic pipe varieties, the application areas throughout the water supply, agricultural irrigation, gas transmission, sewage, mine mortar transportation and other projects and oil fields, chemicals and post and telecommunications and other fields. [0003] Among polyethylene pipes, high-density polyethylene (HDPE) pipes have the characteristics of light weight, excellent mechanical properties, excellent curlability and flexi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/14C08K5/098B29B9/06B29C47/92B29C48/92
Inventor 牛承祥张宇杨世元白竞冰杨柳谈敦礼乔彤森薛旭辉李朋朋赵燕魏福庆陈红
Owner PETROCHINA CO LTD
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