Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of polyethylene resin composition for pipe material

A technology of polyethylene resin and resin composition, applied in the field of resin composition for pipes, can solve the problems of inability to price and grade, limit the scope of use, complicated technology, etc., and achieve improved compatibility, improved dispersion effect, and low density. Effect

Active Publication Date: 2014-10-15
PETROCHINA CO LTD
View PDF18 Cites 3 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of polyethylene resin composition for pipe material
  • A kind of polyethylene resin composition for pipe material
  • A kind of polyethylene resin composition for pipe material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preparation of ULDPE-g-VA graft: According to the weight percentage of ULDPE, 7 parts of vinyl acetate (VA) and 100 parts of ULDPE (4703G) were mixed at high speed for 7 minutes, and the mixed materials were placed in an airtight container Place in the middle for 10hr; then take 0.03 parts of DCP and 0.3 parts of acetone and mix them in a beaker, then put the mixed solution and the placed mixed material, 0.15 parts of antioxidant 1010, and 0.15 parts of calcium stearate into 10L In the high-speed mixer, mix at high speed for 5 minutes; finally, add the mixed material into the Φ67 twin-screw extruder, and the reaction temperature (°C) of each section of the screw is: 160, 170, 180, 190, 200, 190, 180, 175, 170; carry out melt grafting reaction, after reacting for 7 minutes, extrude, cool, and granulate to obtain ULDPE-g-VA graft (grafting rate: 3.1%).

[0045] (2) Preparation of ULDPE weather-resistant masterbatch: according to the weight percentage of ULDPE, 100 par...

Embodiment 2

[0048] (1) The preparation of the ULDPE-g-VA graft is completely the same as in Example 1.

[0049] (2) The preparation of ULDPE weather-resistant masterbatch is completely identical with embodiment 1.

[0050] (3) Preparation of polyethylene pipe resin composition: after mixing 0.003 part of BPO and 0.06 part of TBHP with 0.2 part of acetone solvent, then add 5 parts of HDPE (6100M) granular resin, mix in 10 liters of high-speed mixer for 3 minutes, Make a premixed masterbatch; take out 16 parts of ULDPE weather-resistant masterbatch a and premixed masterbatch, 95 parts of HDPE (6100M) resin, 0.15 parts of antioxidant B561, 0.2 parts of zinc stearate and add them to Φ67 double In the screw extruder, the reaction temperature (℃) of each section of the screw is: 160, 170, 180, 190, 200, 210, 220, 200, 190; Vinyl pipe resin composition. The composition is made into a standard sample by injection method, and the tested properties are shown in Table 1.

Embodiment 3

[0052] (1) The preparation of the ULDPE-g-VA graft is completely the same as in Example 1.

[0053] (2) The preparation of ULDPE weather-resistant masterbatch is completely identical with embodiment 1.

[0054] (3) Preparation of polyethylene pipe resin composition: after mixing 0.004 part of BPO and 0.07 part of TBHP with 0.2 part of acetone solvent, then add 5 parts of HDPE (6100M) granular resin, mix in 10 liters of high-speed mixer for 3 minutes, Make a premixed masterbatch; take out 20 parts of ULDPE weather-resistant masterbatch a and premixed masterbatch, 95 parts of HDPE (6100M) resin, 0.15 parts of antioxidant B561, 0.2 parts of zinc stearate and add them to Φ67 double In the screw extruder, the reaction temperature (℃) of each section of the screw is: 160, 170, 180, 190, 200, 210, 220, 200, 190; Vinyl pipe resin composition. The composition is made into a standard sample by injection method, and the tested properties are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
melt flow indexaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

A purpose of the present invention is to provide a polyethylene resin composition for pipes, wherein a HDPE resin is adopted as a base material, and micro cross-linking modification of ultra-low density polyethylene (ULDPE) weathering resistance master batch and an organic peroxide is adopted to achieve the purpose. The resin composition has an excellent ESCR performance (more than 3000 hours). The resin composition comprises, by weight of high density polyethylene (HDPE), 100% of HDPE 100, 0.05-0.2% of a compound cross-linking aid, and 10-35% of ULDPE weathering resistance master batch, wherein the ULDPE weathering resistance master batch is a blend comprising ULDPE, a composite light stabilizer, a ULDPE-g-VA graft and a dispersing agent, and the ULDPE-g-VA graft is a graft of ULDPE and vinyl acetate. The present invention further provides a preparation method for the resin composition.

Description

technical field [0001] The invention relates to a polyethylene resin composition, in particular to a resin composition for pipes with high-density polyethylene (HDPE) as the base material and excellent resistance to environmental stress cracking. 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 engineering and oil fields, chemical industry, post and telecommunications and other fields. [0003] Among polyethylene pipes, high-density polyethylene (HDPE) pipes have the characteristics of l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08L51/06C08K5/14C08F255/02C08J3/22B29B9/06B29C47/92B29C48/92
CPCB29C47/92
Inventor 徐典宏赵燕曹凤霞李慧文郭珺李耀翟云芳王月霞魏绪玲梁天珍
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com