Unlock instant, AI-driven research and patent intelligence for your innovation.

Polyethylene composition with excellent crack resistance and preparation method thereof

A polyethylene and composition technology, applied in the field of polyethylene composition and its preparation, can solve the problems of difficult application by processing enterprises, reduced processing fluidity, difficult reaction control, etc., and achieve good environmental stress cracking resistance and excellent toughness , Improving the effect of environmental stress cracking resistance

Active Publication Date: 2021-08-10
CHINA PETROLEUM & CHEM CORP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is also difficult to be applied by post-processing enterprises; CN105924584A discloses a long-chain branched high-density polyethylene material resistant to environmental stress cracking. Carry out long-chain branching modification to improve its environmental stress cracking resistance, but the processing fluidity is reduced, and the reaction is not easy to control; CN 102924774 B is based on HDPE resin, through ultra-low density polyethylene (ULDPE) weather-resistant master Granules and organic peroxide micro-crosslinking modification to achieve
However, the processing cost is high by using three-time screw extrusion processing

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
  • Polyethylene composition with excellent crack resistance and preparation method thereof
  • Polyethylene composition with excellent crack resistance and preparation method thereof
  • Polyethylene composition with excellent crack resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A polyethylene composition consisting of the following components in parts by weight:

[0033]

[0034] The preparation method is as follows:

[0035] Dissolve the cross-linking agent and activator in acetone that is 10 to 20 times the total weight of the two, and add it into a high-speed mixer filled with elastomers by spraying, stir until the temperature reaches 40-45°C, and mix The time is 10-20 minutes. After the acetone is completely volatilized, put the remaining materials into the high-speed mixer and mix for 1 to 2 minutes. Put the mixture in the co-rotating twin-screw extruder with a screw diameter of 40mm and a screw length-to-diameter ratio of 44. The feeding section of the extruder The temperature is 120°C, the maximum temperature of the compression section is 150°C, the maximum temperature of the homogenization section is 180°C, and the temperature of the machine head is 190°C. The temperature of each section increases step by step, the screw speed is 1...

Embodiment 2

[0038] A polyethylene composition consisting of the following components in parts by weight:

[0039]

[0040]

[0041] The preparation method of embodiment 2 is identical with embodiment 1.

Embodiment 3

[0043] A polyethylene composition consisting of the following components in parts by weight:

[0044]

[0045] The preparation method of embodiment 3 is identical with embodiment 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
Login to View More

Abstract

The invention belongs to the field of polymer material modification, and in particular relates to a polyethylene composition with excellent crack resistance and a preparation method thereof. The components include the following parts by weight: 100 parts of HDPE resin, 0.03-0.15 parts of crosslinking agent, 0.05-0.5 parts of activator, 0.5-1.5 parts of polyethylene glycol, 8-15 parts of elastomer, 0-1.0 parts of auxiliary agent share. The crosslinking agent is an organic peroxide with a 1min half-life temperature of 140-165°C and an activation energy of ≥130kJ / mol. The invention has higher environmental stress cracking resistance than the original HDPE resin, while maintaining the rigidity and processing performance of the original HDPE resin, and can be used as a raw material for the production of plastic hollow containers that require higher environmental stress cracking resistance. The invention also provides its preparation method, the process is simple and reasonable, and it is easy for industrialized production.

Description

technical field [0001] The invention belongs to the field of polymer material modification, and in particular relates to a polyethylene composition with excellent crack resistance and a preparation method thereof. Background technique [0002] High-density polyethylene (HDPE), which is used to prepare hollow containers for packaging industrial chemicals, medicines, and food, has high crystallinity and high rigidity, and is prone to environmental stress cracking during use. Therefore, improving the environmental stress cracking resistance is the key to developing hollow container products. an important research direction. [0003] At present, there are mainly two methods for improving the environmental stress cracking resistance of HDPE materials: one is physical blending modification, and the other is chemical modification. Physical blending modification is by blending with rubber-like elastomer or flexible polyethylene, but this method reduces the rigidity of the material,...

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): C08L23/06C08L71/02C08L23/08C08K5/14C08K5/3415C08J3/24
CPCC08J3/246C08J2323/06C08J2423/08C08L23/06C08L2205/03C08L2207/062C08L2312/00C08L71/02C08L23/0815C08K5/14C08K5/3415C08L23/0853
Inventor 王日辉郭锐王群涛高凌雁许萍裴小静王秀丽
Owner CHINA PETROLEUM & CHEM CORP