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Preparation method of cross-linked polymer wax micropowder

A technology of cross-linked polymers and polymers, applied in applications, coatings, inks, etc., can solve the problems of wide molecular weight distribution, low melting point, low hardness, etc., and achieve enhanced heat resistance and environmental aging resistance, good water repellency, The effect of enhanced hydrophobicity

Active Publication Date: 2011-09-21
NANJING TIANSHI NEW MATERIAL TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

The hardness of oxidized polyethylene wax is low, the melting point is low, and the molecular weight distribution is wide. It is not easy to prepare oxidized polyethylene wax micropowder by traditional technology, and the wear resistance is relatively poor after being prepared into micropowder.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 100

[0016] Example 100KG of newly cracked polyethylene wax melt is at a temperature of 225°C, and 5KG of impregnated oxidized polyethylene wax containing 1.5KG A-151 silane is evenly added online, stirred and mixed for 6 minutes to complete grafting, and micronized to Dv50 Greater than 6um.

[0017] The micropowder was stirred in deionized water containing 0.1KG butyltin dilaurate at a temperature of 50 DEG C for 2 hours, and after drying, the degree of crosslinking was checked, and the gel rate was greater than 50%.

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Abstract

The invention belongs to the technical field of polymeric material in fine chemicals, and relates to a preparation method of a cross-linked polymer wax. The method comprises the following steps: a. melting a polymer wax and grafting silane; b. carrying out micronization on the polymer grafted with the silane; c. obtaining a polymer wax micropowder with an average particle size between 1-50 [mu]m; besides, a crosslinking of a micronized graft polymer is finished in water. Before the crosslinking, the polymer wax micropowder prepared by the method is hydrophilic and is conducive to be added into a water-based paint ink; after the crosslinking, the polymer wax micropowder has good water repellency and a much higher molecular weight. Compared with oxidized polyethylene wax micropowder of prior art, the polymer wax micropowder has increased hydrophobicity, heat resistance, and environmental aging resistance, and is wear resistant and stain resistant as well.

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 cross-linked polymer wax. Background technique [0002] Polyethylene wax micropowder has been widely used in coatings and inks due to its excellent abrasion resistance and stain resistance. When used in water-based paint inks, because polyethylene wax has no polarity, it is difficult to mix evenly with water, and its use is limited. In order to improve the affinity with the water phase, it can be easily added to water-based paint inks. Polyethylene wax is usually oxidized to prepare oxidized polyethylene wax micropowder, or a surfactant is added for emulsification to form polyethylene wax emulsion. These methods more or less affect its function as a wax: the hardness and abrasion resistance of oxidized polyethylene wax micropowder prepared after polyethylene wax is oxidized are worse than polyethylene wax micropowder, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08J3/12C08F255/02C08F289/00C09D151/06C09D151/00C09D11/00
Inventor 于天诗
Owner NANJING TIANSHI NEW MATERIAL TECH
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