Preparation method for door sheet protective agent

Abstract

The invention discloses a preparation method for a door sheet protective agent. The preparation method comprises the following steps of completely reacting polyester polyol with poly(hexanediol adipate); uniformly stirring an obtained reaction product and isophorone diisocyanate, and introducing nitrogen to be reacted with the reaction product and the isophorone diisocyanate to generate isocyanate-terminated polyurethane; heating the polyurethane, hydroxyethyl methylacrylate and di-n-butyltin dilaurate to obtain a prepolymer with double bonds at both ends, and adding 2-methyl methacrylate for reaction to make the prepolymer contain both hydrophilic ion groups and unsaturated double bonds; adding 2-methyl methacrylate into the polyurethane prepolymer for viscosity reduction, performing neutralization with triethylamine, and adding an ethylene diamine solution at concentration of 3 percent for emulsion dispersion; performing oscillation dispersion on a polyacrylamide solution at concentration of 1.5 percent, polyoxyethylene ether and nanometer aluminum oxide, performing high-speed grinding with organic siloxane, and adding polyvinylpyrrolidone for oscillation dispersion. Therefore, the acid resistance, the alkali resistance and the stability of the protective agent are improved.

Description

technical field [0001] The invention relates to coatings, in particular to a preparation method of a door panel protective agent. Background technique [0002] The types of coatings used on wooden doors are mainly divided into five types: PU coatings, PE coatings, NC coatings, UV coatings, and W coatings. In the painting of wooden doors, the above five kinds of coatings are commonly used. They have different shares in different periods and different types of enterprises. PU coating is the most commonly used type of paint in domestic enterprises. It has better comprehensive properties, such as: its process performance is better, and its fullness, hardness, sandability, etc. have better performance. PU coatings are the most widely used and most widely used in wooden door painting. The most commonly used PE coating is PE primer. It is divided into transparent primer and solid color primer. As a kind of high solid content coating, PE coating has high hardness, good fullnes...

AI Technical Summary

Problems solved by technology

At the same time, it also has its own shortcomings: such as high construction requirements, high brittleness, difficult grinding, etc.

[0003] In some specific environments, the wooden door panels are installed outdoors. Due to the harsh outdoor environment, they will be exposed to the sun and eroded by wind and rain, so some protective measures need to be taken on the wooden door panels. The door panel has the effect of fire prevention, but it has poor effects on its resistance to sunlight, waterproof and corrosion, which leads to the problem that the service life of the wooden door panel is not long

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