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 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...