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Preparation method of plate out-free external lubricant

An external lubricant and pressure analysis technology, which is applied in the field of polymer material processing, can solve the problems of labor and time consumption, product scrapping, product surface defects, etc., reduce the number of cleaning and filter replacement, and the structure of the external lubrication film is firm , Good effect of external lubrication

Inactive Publication Date: 2019-04-12
摩特卡(杭州)进出口贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the commonly used polyolefin external lubricants are used in PVC processing, the phenomenon of pressure separation often occurs, that is, the content of the lubricant used exceeds its solubility in the PVC matrix and migrates to the surface. Usually, this process will bring out pigments or fillers, etc. to deposit on the surface of the workpiece
Pressure analysis will cause surface defects of the product, and in severe cases, the product will be scrapped directly. On the other hand, the sediment caused by pressure analysis is difficult to remove, which consumes a lot of labor and time, increases costs, and reduces production efficiency.

Method used

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  • Preparation method of plate out-free external lubricant

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of a pressure-separation-free external lubricant, the method comprising the steps of:

[0019] (1) Dissolve 3.5kg of allyl urea and 0.3kg of a 1:1 mixture of lauryl peroxide and dicumyl peroxide in a small amount of acetone solution, and then mix the two evenly before use;

[0020] (2) Add 100kg of polyethylene wax to the reactor, melt it and keep it at 140°C, then start to blow nitrogen into the reactor, and after the air in the reactor is completely driven out, start to drop the mixed solution;

[0021] (3) After the dropwise addition, react at 140°C for one hour. Continue to protect with nitrogen during this process. Stop heating after the reaction is over. When the temperature drops to about 100°C, pour the product into a container filled with cold water. And vigorously stirred, filtered to get the crude product;

[0022] (4) Take the crude product, add xylene, heat to dissolve, then add acetone to it to form a white precipitate, wash the filte...

Embodiment 2

[0024] A preparation method of a pressure-separation-free external lubricant, the method comprising the steps of:

[0025] (1) Dissolve 4.5kg of allyl urea and 0.35kg of benzoyl peroxide in a small amount of acetone solution, then mix the two evenly before use;

[0026] (2) Add 100kg of Fischer-Tropsch wax into the reactor, keep it at 120°C after melting, and then start to blow nitrogen into the reactor, and after the air in the reactor is completely driven out, start to drop the mixed solution;

[0027] (3) After the dropwise addition, react at 120°C for one hour. Continue to protect with nitrogen during this process. After the reaction, stop heating. When the temperature drops to about 100°C, pour the product into a container filled with cold water. And vigorously stirred, filtered to get the crude product;

[0028] (4) Take the crude product, add xylene, heat to dissolve, then add acetone to it to form a white precipitate, wash the filter cake with acetone for 3 times afte...

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Abstract

The invention aims to solve the technical problems of existing polyolefin wax external lubricants to enhance the use effect of external lubricants during PVC processing, and also can solve the external lubricant-related plate out phenomenon in PVC processing. Therefore, the invention discloses an external lubricant, which is prepared by taking the existing common polyolefin wax external lubricantand allyl urea as the raw materials and through step-by-step reaction of specific process. The external lubricant prepared by the method provided by the invention can effectively delay plasticizationduring PVC processing, and has strong external lubrication function. Moreover, after application of the external lubricant provided by the invention, external lubricant-related plate out phenomenon does not appear during PVC processing.

Description

technical field [0001] The invention relates to the field of polymer material processing, in particular to a pressure-separation-free external lubricant for polyvinyl chloride processing. Background technique [0002] Polyvinyl chloride (PVC) is the second largest general-purpose plastic after polyethylene. It is widely used in construction, packaging, communication, chemical and other industries because of its advantages such as low price, corrosion resistance and flame retardancy. However, PVC is very polar, and there is a strong interaction between its structural units of each layer and between them and processing equipment, resulting in high melt viscosity during processing, high friction between materials and between materials and equipment, and serious adhesion. Both these processing problems and thermal instability make PVC very difficult to thermoplastically process. Therefore, PVC must be added with a suitable lubricant during processing. Generally, PVC lubricants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F226/02C08L27/06C08L51/06C08K5/58
CPCC08F251/00C08L27/06C08F226/02C08L51/06C08K5/58
Inventor 徐晓鹏韩盈芝钮博翔
Owner 摩特卡(杭州)进出口贸易有限公司
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