Preparation method of oxidized polyethylene wax

A technology for oxidizing polyethylene wax and polyethylene wax, which is applied in the field of preparation of oxidized polyethylene wax, can solve the problems of high viscosity, a small amount of crosslinking reaction, dependence on imports, and low consumption, so as to reduce crosslinking reaction and meet the acid value standard , low cost effect

Inactive Publication Date: 2018-11-23
昀联科技有限公司
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although oxidized polyethylene is relatively expensive in the market and the market is tight, domestic consumption is still relatively low, and domestic enterprises have not fully mastered the relevant production technology. Therefore, my country currently relies heavily on imports for related products.
[0003] At present, the methods for preparing oxidized polyethylene wax are mainly divided into two categories: one is to directly inject oxygen-containing gas into the wax melt. Higher, there are defects such as a small amount of cross-linking reaction; the other is to disperse the wax into fine particles with the help of a non-ionic emulsifier at a temperature higher than the melting point of the wax, and then introduce oxygen-containing gas, so that under high pressure conditions The dispersion and barrier effect of the water phase can avoid the influence of high viscosity and crosslinking, but the solvent needs to be recovered later, and the steps are cumbersome

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of the present embodiment oxidized polyethylene wax comprises the following steps:

[0021] (1) A certain amount of high-density polyethylene resin is added in the reactor as raw material polyethylene, then feed nitrogen into the reactor to purify the oxygen;

[0022] (2) Turn on the stirring device, raise the temperature to 350°C, perform a constant temperature cracking reaction for 2 hours, cool down to below 120°C and discharge, and obtain low molecular weight polyethylene wax;

[0023] (3) Add a certain amount of cracked low-molecular-weight polyethylene wax to the reactor, heat it to a temperature higher than the melting point of the wax, then turn on the stirring device, and simultaneously feed oxygen at a gas flow rate of 2L / min, and continue to heat up to 150 °C, react for 12 hours, after the reaction, cool down to below 120 °C and discharge to obtain oxidized polyethylene wax.

Embodiment 2

[0025] The preparation method of the present embodiment oxidized polyethylene wax comprises the following steps:

[0026] (1) A certain amount of high-density polyethylene resin is added in the reactor as raw material polyethylene, then feed nitrogen into the reactor to purify the oxygen;

[0027] (2) Turn on the stirring device, raise the temperature to 370°C, conduct a constant temperature cracking reaction for 8 hours, cool down to below 120°C and discharge, and produce low molecular weight polyethylene wax;

[0028] (3) Add a certain amount of cracked low-molecular-weight polyethylene wax to the reactor, heat it to a temperature higher than the melting point of the wax, then turn on the stirring device, and simultaneously feed air at a gas flow rate of 4L / min, and continue to heat up to 160 °C, react for 8 hours, after the reaction is completed, cool down to below 120 °C and discharge to obtain oxidized polyethylene wax.

Embodiment 3

[0030] The preparation method of the present embodiment oxidized polyethylene wax comprises the following steps:

[0031] (1) A certain amount of low-density polyethylene resin is added in the reactor as raw material polyethylene, then in the reactor, feed nitrogen and oxygen purge is exhausted;

[0032] (2) Turn on the stirring device, raise the temperature to 400°C, conduct a constant temperature cracking reaction for 5 hours, cool down to below 120°C and discharge the material, so as to obtain low molecular weight polyethylene wax;

[0033] (3) Add a certain amount of cracked low-molecular-weight polyethylene wax to the reaction kettle, heat to a temperature higher than the melting point of the wax, then open the stirring device, and simultaneously feed air at a gas flow rate of 6L / min, and continue to heat up to 130 °C, react for 16 hours, after the reaction, cool down to below 120 °C and discharge to obtain oxidized polyethylene wax.

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

No PUM Login to view more

Abstract

The invention discloses a preparation method of oxidized polyethylene wax. The preparation method comprises the following steps: adding a given amount of raw material polyethylene into a reaction kettle, introducing nitrogen to purge the oxygen, stirring, heating to facilitate the cleavage reaction, then cooling, discharging the material, heating the prepared polyethylene wax to a temperature greater than a wax melting point, stirring, introducing oxidant gas at a set gas flow rate, continuously heating to a needed reaction temperature, reacting for a given time, after the reaction is ended, cooling, discharging, and obtaining the oxidized polyethylene wax. The preparation method has the beneficial effects that the high density polyethylene resin, low density polyethylene resin or waste polyethylene plastics are used as a raw material, the raw material can be selected according to a use and the cost, the waste can be effectively utilized, and the environmental protection is facilitated; the oxygen-containing gas is directly introduced into the wax melt, so that the preparation method has the advantages of low cost, simple process and the like; and meanwhile, by controlling variousreaction conditions, the cross-linking reaction in the oxidation process can be reduced, so that the viscosity and acidic value of a product can be ensured to reach the standard.

Description

technical field [0001] The invention relates to a method for synthesizing polymers, in particular to a method for preparing oxidized polyethylene wax. Background technique [0002] Oxidized polyethylene is made by oxidizing polyethylene wax through a special oxidation process, and has the characteristics of non-toxic, odorless and non-corrosive. It has high softening point, low viscosity, excellent chemical stability, and good compatibility with rubber, plastic, paraffin and other materials. Oxidized polyethylene emulsion has a wide range of applications, and can be used as a viscosity modifier for hot melt adhesives, a dispersant for inks, an anti-abrasion agent, a finishing agent for textile fabrics, a moisture-proof agent for packaging cartons, a stripping agent for paper industry, glass and glass products Finishing agent for leather industry, polishing agent for tanning industry, impregnating agent for asbestos tile, etc. Oxidized polyethylene can be used directly, dis...

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
IPC IPC(8): C08F8/06C08F8/50C08F110/02
CPCC08F8/06C08F8/50C08F110/02
Inventor 黄新冰黄颖
Owner 昀联科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap