Preparation method of cross-linked polymer wax micropowder

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 specifically relates to a preparation method of crosslinked polymer wax. Background technique [0002] Polyethylene wax powder is widely used in coatings and inks due to its excellent abrasion resistance and stain resistance. When used in water-based paint and ink, because polyethylene wax has no polarity, it is difficult to mix uniformly with water, and its use is restricted. In order to improve the affinity with the water phase, it can be easily added to the water-based paint ink. The polyethylene wax is usually oxidized to prepare oxidized polyethylene wax powder, or a surfactant is added for emulsification to prepare a polyethylene wax emulsion. These methods have more or less affected its role as a wax: the hardness and wear resistance of the oxidized polyethylene wax powder prepared after the polyethylene wax is oxidized are worse than that of the polyethylene wax po...

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.