Polyurethane acrylate curable paint synthesizing method

Abstract

The invention relates to a synthesizing method of a polyurethane acrylate curable paint. The method comprises the following steps: polyoxypropylenetriol is subjected to a reduced-pressure vacuum treatment; pretreated toluene diisocyanate and 1,6-hexanediol diacrylate are added into a three-necked flask according to a formula, and are well mixed by stirring; polyoxypropylenetriol is added into the three-necked flask in batches and is subjected to a reaction; isocyano content is determined with a di-n-butylamine method after the reaction; hydroxyethyl methacrylate contaning p-hydroxyanisole and a catalyst is added into the three-necked flask and is subjected to a reaction; the product is cooled to room temperature and is discharged, such that a polyurethane acrylate oligomer is obtained; the polyurethane acrylate oligomer, an active diluting monomer, and auxiliary agents such as a coupling agent with amounts according to the formula are weighed and sequentially added into a flask; the mixture is well dispersed by stirring; a photoinitiator is added under a situation protected from light, and the mixture is well mixed, such that the polyurethane acrylate curable paint is obtained. The method provided by the invention is simple, and has low cost. The synthesized polyurethane acrylate curable paint has good adhesion, low-temperature resistance, and excellent wear resistance.

Description

technical field [0001] The invention relates to a synthesis technology of organic curing coatings, in particular to a synthesis method of polyurethane acrylate curing coatings. Background technique [0002] Polyurethane acrylate (PUA) is an important oligomer for the preparation of UV-curable coatings. The molecular structure of PUA oligomers has ether bonds and urethane bonds, and various hydrogen bonds can be formed between molecular chains. At the same time, there are flexible segments in the molecular chains. ,, so urethane acrylate has good adhesion to the substrate, has excellent low temperature resistance and abrasion resistance, and is widely used in UV curing coating systems. [0003] Urethane acrylate is generally produced by the reaction of diisocyanate, diol, and hydroxyethyl acrylate, and the synthesis conditions are harsh. In the actual production process, due to factors such as the selection of reaction temperature, improper reaction monomer ratio, and unreaso...

AI Technical Summary

Problems solved by technology

[0003] Urethane acrylate is generally produced by the reaction of diisocyanate, diol, and hydroxyethyl acrylate, and the synthesis conditions are harsh. In the actual production process, due to factors such as the selection of reaction temperature, improper reaction monomer ratio, and unreasonable control of process conditions, Generally, incomplete reaction, many by-products, poor hue, unreasonable molecular weight and molecular weight distribution are prone to occur in the synthesis of prepolymers, which will affect the performance of the prepared UV-curable coatings.