Preparation method of oxidized polyethylene wax

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...

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