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Preparation method of oxidized polyethylene polymer wax for coating

A technology for oxidizing polyethylene and polymers, which is applied in the direction of coating, etc., and can solve problems such as ineffectiveness

Pending Publication Date: 2019-06-11
扬州罗兰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of oxidized wax used in coatings often fails to achieve the desired effect. At present, most of the domestic market uses imported oxidized wax

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A preparation method of oxidized polyethylene high polymer wax for coatings, which is carried out according to the following steps: first 1) heat and melt low-density polyethylene wax and polypropylene in a certain proportion, heating temperature is 260°C, and stir at 260°C , the mixing time is 2 hours;

[0015] 2) Pump the stirred and mixed materials to the oxidation kettle, then add catalyst to the reaction kettle and pass oxygen, heat up to 240°C for 4 hours, the reaction kettle needs to be protected with nitrogen during the oxidation process, and finally cool and solidify to form a product get oxidized wax;

[0016] The low-density polyethylene wax and polypropylene are in parts by mass: 80 parts of low-density polyethylene wax and 20 parts of polyethylene.

[0017] Preferably, in the step 2), the material is placed on the upper part of the oxidation kettle.

[0018] Preferably, in the step 2), the nitrogen gas is passed into the reaction kettle from the lower par...

Embodiment 2

[0020] A preparation method of oxidized polyethylene high polymer wax for coatings, which is carried out according to the following steps: firstly, 1) heat and melt low-density polyethylene wax and polypropylene in a certain proportion at a heating temperature of 280°C, and stir at a constant temperature of 260°C , the mixing time is 2.1 hours;

[0021] 2) Pump the stirred and mixed materials to the oxidation kettle, then add catalyst to the reaction kettle and pass oxygen, heat up to 220°C for 5 hours, the reaction kettle needs to be protected with nitrogen during the oxidation process, and finally cool and solidify to form a product get oxidized wax;

[0022] The low-density polyethylene wax and polypropylene are in parts by mass: 85 parts of low-density polyethylene wax and 15 parts of polyethylene.

[0023] Preferably, in the step 2), the material is placed on the upper part of the oxidation kettle.

[0024] Preferably, in the step 2), the nitrogen gas is passed into the...

Embodiment 3

[0026] A preparation method of oxidized polyethylene high polymer wax for coatings, which is carried out according to the following steps: first 1) first heat and melt low-density polyethylene wax and polypropylene in a certain proportion, heating temperature is 250°C, and stir at a constant temperature of 260°C , mixing time 1.8 hours;

[0027] 2) Pump the stirred and mixed material to the oxidation kettle, then add catalyst to the reaction kettle and pass oxygen, heat up to 260°C for 6 hours, the reaction kettle needs to be protected with nitrogen during the oxidation process, and finally cool and solidify to form a product get oxidized wax;

[0028] The low-density polyethylene wax and polypropylene are in parts by mass: 70 parts of low-density polyethylene wax and 30 parts of polyethylene.

[0029] Preferably, in the step 2), the material is placed on the upper part of the oxidation kettle.

[0030] Preferably, in the step 2), the nitrogen gas is passed into the reaction...

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Abstract

The invention relates to a preparation method of oxidized polyethylene polymer wax for coating. The method comprises the following steps: 1) heating and melting low density polyethylene wax and polypropylene in a certain proportion at the heating temperature to 240-280 DEG C; stirring at the constant temperature of 260 DEG C, wherein the mixing time is 1.8-2.5 hours; 2) pumping the stirred and mixed material to an oxidation kettle, adding catalyst and pumping oxygen into the reaction kettle, and heating to 200-280 DEG C and reacting for 4-6 hours, adding nitrogen into that reaction kettle during the oxidation process, and finally cooling and curing and molding to prepare the oxidized wax. The invention provides a preparation method of oxidized polyethylene polymer wax for coating, which has reasonable process and high performance.

Description

Technical field [0001] The invention relates to a preparation method of oxidized polyethylene high polymer wax for coatings, and belongs to the technical field of polyethylene wax preparation. Background technique [0002] Oxidized wax is added to the paint to improve the scratch resistance of the paint, which requires the melting point and melt viscosity of the wax to be high. However, the oxidation currently produced in China uses low-density and high-pressure polyethylene cracking reaction to produce low-density polyethylene. After the wax is oxidized, oxidized wax is produced. The melting point of this wax does not exceed 100℃, and the viscosity is within 20-60mm² / s@240℃. This kind of oxidized wax often fails to achieve the desired effect when used in coatings. At present, most imported oxidized wax is used in the domestic market. Contents of the invention [0003] In view of the above defects, the purpose of the present invention is to provide a method for preparing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/06C08F110/02C08F110/06C09D7/65
Inventor 朱建军樊勇军
Owner 扬州罗兰新材料有限公司
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