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Method for continuously preparing polymer wax ultrafine powder

A technology of ultrafine powder and polymer, which is applied in the field of preparation of polymer wax ultrafine powder, which can solve the problems of environmental protection and high separation cost, and achieve the effects of high production efficiency and fast wax melting speed

Active Publication Date: 2013-03-27
NANJING TIANSHI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method must separate the ultrafine powder of polymer wax from the solvent, and the cost of solid / liquid separation is high, and it is not environmentally friendly.

Method used

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  • Method for continuously preparing polymer wax ultrafine powder
  • Method for continuously preparing polymer wax ultrafine powder
  • Method for continuously preparing polymer wax ultrafine powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Add PEW-0200 polyethylene wax 1 with a molecular weight of 2000 and a melting point of 110 degrees to the solid feed bin of the continuous feeder 2, heat and melt through the continuous wax melting machine, and heat up to 130 degrees. Pressed to 10MPa, mixed with 10MPa compressed carbon dioxide gas from the compressed gas source 6 at the nozzle 3 and sprayed into the spray tower 4, the spray temperature is 125 degrees, the wax is cooled in the spray tower to form polyethylene wax ultrafine powder, The polyethylene wax superfine powder product 5 was obtained after classification.

[0019] The product index that present embodiment prepares is as follows:

[0020]

Embodiment 2

[0021] Embodiment 2: import 3# carnauba wax 80%, national standard No. 52 refined paraffin wax 20%, after mixer machine mixes, join in the solid feed bin of continuous feeder 2, heat and melt through continuous wax melting machine , and heated up to 120 degrees, boosted to 6MPa, mixed with 6MPa compressed carbon dioxide gas from the compressed gas source 6 at the nozzle 3 and sprayed into the spray tower 4, the spray temperature is 110 degrees, the wax is cooled in the spray tower and formed Polyethylene wax ultrafine powder, after classification, obtain polyethylene wax ultrafine powder product 5.

[0022] The product index that present embodiment prepares is as follows:

[0023]

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Abstract

The invention belongs to the technical field of polymer materials in the fine chemical industry, and relates to a continuous preparation method of polymer wax ultrafine powder. The preparation method comprises the following steps of: a, melting polymer wax in a continuous wax melting machine and pressurizing to 0.1-20MPa; b, mixing the molten polymer wax with compressed gas which comprises compressed air, nitrogen and carbon dioxide under the pressure of 0.1-20MPa; and c, keeping the temperature of the mixture of the polymer wax and the compressed gas to be above the melting point of the polymer wax and spraying to form the ultrafine powder, thus obtaining the polymer wax ultrafine powder with the mean particle size of 1-80mu m. The method provided by the invention can be used for producing various kinds of polymer wax ultrafine powder, and is especially suitable for producing low-melting polymer wax ultrafine powder and mixed wax ultrafine powder compounded from various kinds of polymer wax. The prepared polymer wax ultrafine powder can be widely used in oil paint, printing ink, powder coating, leather, papermaking and fabric finish to play the effects of resisting abrasion, resisting sticking, enhancing the handle and the like.

Description

technical field [0001] The invention belongs to the technical field of fine chemical polymer materials, and in particular relates to a preparation method of superfine polymer wax powder. Background technique [0002] Due to its excellent performance, the superfine powder of polymer wax has been widely used in inks and coatings due to its high friction resistance and stain resistance. Therefore, it has also given birth to a variety of polymers Wax superfine powder process. Traditional methods include: (1) mechanical grinding, including jet grinding, cryogenic grinding, and wet grinding; (2) direct polymerization; (3) precipitating powder from polymer solution. [0003] The mechanical grinding method is the most widely used method, but polymer waxes are all thermoplastic materials, and the mechanical grinding method can only grind polymer waxes with particularly high melting points and brittleness, and there are very few materials suitable for processing by this method. Refri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08L23/06C08L91/06
Inventor 于天诗
Owner NANJING TIANSHI NEW MATERIAL TECH
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