Characteristics and Applications of Oxidized Polyethylene Wax - Detailed Explanation of Product Features, Uses, and Char

Oxidized polyethylene wax is a polymer compound. The production method involves polymerizing ethylene into polyethylene and then oxidizing the polyethylene to obtain oxidized polyethylene wax. It has good wear resistance, heat resistance, chemical resistance, and electrical insulation. Widely used in various fields such as manufacturing, chemical industry, construction, printing, coatings, etc.

There are many types of oxidized polyethylene wax, and the common ones are:

1. High density oxidized polyethylene wax; 

2. Low density oxidized polyethylene wax;

3. Microcrystalline oxidized polyethylene wax;

4. Linear oxidized polyethylene wax;

5. Non ionic oxidized polyethylene wax, etc.

When choosing oxidized polyethylene wax, the following aspects should be considered:

1. Product purity;

2. Product granularity;

3. Product dissolution point;

4. Product content;

5. Product application areas.

The difference between high-density oxidized polyethylene wax and low-density oxidized polyethylene wax lies in their different densities. The density of high-density oxidized polyethylene wax is relatively high, generally between 0.93-0.96g/cm ³, while the density of low-density oxidized polyethylene wax is relatively low, generally between 0.88-0.92g/cm ³.

The production process of high-density oxidized polyethylene wax generally includes the following processes:

1. Raw material processing;

2. Heating and mixing;

3. Oxidation reaction;

4. Refrigeration and separation;

5. Refinement and packaging.

Production process of low-density polyethylene

The production process of low-density polyethylene mainly includes ethylene secondary compression, injection of initiators and conditioners, polymerization reaction system, high and low pressure separation and recovery system, extrusion granulation and post-treatment system.

According to the different types of reactors, they can be divided into two types: high-pressure tube type and high-pressure kettle type.

Both tubular and kettle processes have their own characteristics: tubular reactors have a compact structure, are easy to produce and maintain, and can withstand higher pressures; The structure of a kettle type reaction kettle is complex, and maintenance and installation are relatively difficult. The volume of the reaction kettle is generally small because its ability to dissipate heat from the reaction is limited.

Generally speaking, large equipment mostly adopts the tubular method, while high value-added products such as special models with high vinyl acetate content and EVA production equipment adopt the kettle method.

Due to different processes, kettle type products have multiple side chains and good impact strength, making them suitable for extruding coating resins. Tube type products have a wide molecular weight distribution, few branches, strong optical properties, and are suitable for making thin films.

Production process of low-density polyethylene by pressure tube method

The inner diameter of a tubular reactor is generally 25~82mm, the length is 0.5~1.5mmkm, the length to diameter ratio is greater than 10000: the diameter to inner diameter ratio is generally not less than 2mm, and there is also a water jacket used to remove some of the reaction heat.

So far, the basic processes of various tubular processes are roughly the same. Due to the use of different reactor feed points, different content adjusters, initiators, and injection locations, as well as different additive injection methods, product processing, ethylene return rates, and delivery locations, various processes with different characteristics will be formed.

At present, the more mature tubular production processes mainly include LyondellBasell's LupotechT process, ExxonMobil's tubular process, DSM's CTR process, etc.

Substitutes for oxidized polyethylene wax include:

 1. Polyethylene wax; 2. Polypropylene wax; 3. Polyethylene lipids; 4. Polyester; 5. Polyurethane, etc.