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

Ultra-high molecular weight polyethylene catalyst and preparation method thereof

A technology of ultra-high molecular weight and polyethylene, applied in the production of bulk chemicals, etc., can solve the problem of low polymerization activity of catalysts, and achieve the effects of industrial application, high catalytic activity, and strong operability

Active Publication Date: 2017-11-24
PETROCHINA CO LTD
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the particle size distribution of the polymer is ideal, the polymerization activity of the catalyst is not high

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
  • Ultra-high molecular weight polyethylene catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Catalyst preparation:

[0042]Disperse 5 g of ethoxymagnesium carrier in 120 ml of n-decane solvent, at 150 °C, stir at 300 rpm, after fully dispersed, lower the system temperature to 80 °C, add bromocyclohexane 2 ml, react for 30 min, then add A mixture of 0.5ml of ethylene glycol dimethyl ether and 0.3g of aluminum triisopropoxide, keep the system temperature at 80°C and react for 60min, then add 25ml of transition metal compound titanium tetrachloride dropwise, continue the reaction for 120min, after completion, cool naturally After reaching room temperature, it was washed five times with 200 ml of n-hexane and vacuum-dried to obtain a light yellow solid powder with good fluidity. After analysis, the titanium content was 3.0%.

[0043] Polymerization test:

[0044] Replace the 2L polymerizer with nitrogen for three times, add 1L of hexane, start the stirring system, heat the system, add 10mg of catalyst, 0.6ml of cocatalyst triethylaluminum; when the temperature of...

Embodiment 2

[0046] Change the aluminum triisopropoxide consumption into 0.4g, and all the other are the same as in Example 1.

[0047] Polymerization test is with embodiment 1. The polymerization test results are shown in Table 1.

Embodiment 3

[0049] Change the aluminum triisopropoxide consumption into 0.5g, and all the other are the same as in Example 1.

[0050] Polymerization test is with embodiment 1. The polymerization test results 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
Login to View More

Abstract

The invention relates to a novel ultra-high molecular weight polyethylene catalyst in order to achieve the purpose of regulating the molecular weight of ultra-high molecular weight polyethylene according to demands. After the content of a main component titanium compound of the catalyst is determined, the content of an alkoxy aluminum compound is regulated, thereby effectively regulating and controlling the molecular weight of the ultra-high molecular weight polyethylene product, wherein the molecular weight of the polymerization product is 2-6 millions. The catalyst prepared through the method is high in catalytic activity and uniform in particle size, has no large particle and causes no agglomeration. The preparation method of the catalyst has the characteristics of being simple and easy to implement, safe, environmentally friendly, high in operability, beneficial to industrialized application, etc.

Description

technical field [0001] The invention relates to an ultra-high molecular weight polyethylene catalyst with adjustable molecular weight and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) refers to polyethylene products with a relative molecular weight of more than 1.5 million. It is a thermoplastic engineering plastic with excellent comprehensive properties. It has incomparable comprehensive properties such as impact resistance, wear resistance, low temperature resistance, light weight (the specific gravity per unit pipe length is only one-eighth of the steel pipe weight), safety and sanitation, and self-lubricating properties. UHMWPE is widely used in textile, mining, chemical industry, packaging, machinery, construction, electrical, medical, sports, military, aerospace and other fields due to its superior performance that other engineering plastics cannot match. [0003] It is well known that the molecular weigh...

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 Applications(China)
IPC IPC(8): C08F110/02C08F210/16C08F4/655C08F4/651C08F4/649C08F4/645C08F4/02
CPCC08F4/02C08F4/645C08F4/6493C08F4/6494C08F4/651C08F4/655C08F110/02C08F210/16C08F2500/01Y02P20/52
Inventor 王健崔月冯文元张利仁王博张利粉张光辉崔勇王大明郭洪元王永年刘志军徐丽艳王俊荣焦金华孙辉宇王永帮
Owner PETROCHINA CO LTD