Heat-resistant water-based polyester coating and preparation method thereof

Abstract

The invention discloses a heat-resistant water-based polyester coating which comprises the following raw materials in parts by weight: 0.4-1 part of 8-hydroxyquinoline, 1-2 parts of pyromellitic dianhydride, 1-2 parts of bisphenol A phosphite, 3-5 parts of beeswax, 35-40 parts of rosin, 8-10 parts of fumaric acid, 6-7 parts of 20-30 percent of sodium hydroxide solution, 20-34 parts of ethylene glycol, 0.1-0.2 part of antimony trioxide, 2-3 parts of sodium polyacrylate, 13-20 parts of zinc chloride, 80-90 parts of polyether glycol, 100-130 parts of toluene diisocynate, 2-3 parts of 2,2-dimethylolpropionic acid, 4-5 parts of diethylene glycol, 1-2 parts of triethylamine, 0.2-0.4 part of 2-mercapto benzimidazole, 3-5 parts of aluminum stearate, 4-6 parts of pentaerythritol and 1-2 parts of nickel aminosulfonate. As the bisphenol A phosphate, the aluminum stearate and the like are added, the heat resistance of the finished coating can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of polyester coatings, in particular to a hot water resistant polyester coating and a preparation method thereof. Background technique [0002] At present, although the commonly used water-based polyurethane materials are widely used in coatings, adhesives and other industries due to their environmental friendliness, conventional water-based polyurethane materials still have shortcomings such as poor heat resistance, weather resistance, and poor antistatic properties, which affect In order to better improve the overall performance of water-based polyurethane coatings, overcome its own shortcomings such as poor water resistance and low solid content, and expand its application range, the modification of water-based polyurethane has become a major research topic in recent years. Hotspots, the depth and breadth of discussions have also been expanded. The modification of waterborne polyurethane is mainly divide...

AI Technical Summary

Problems solved by technology

As one of the important forestry biomass resources in my country, rosin has been studied by scholars to add it to the synthesis of polyurethane to improve the gloss and adhesion of polyurethane products, but they all directly add rosin to polyurethane, while Rosin is a mixture of various resin acids and its functionality is not high, so it cannot be added to the main chain of polyurethane, and the performance of the product cannot be significantly improved, and the characteristics of rosin cannot be fully utilized; rosin has high hardness, good heat resistance and insulation , anti-corrosion and other excellent properties, if it is introduced into polyurethane, it can overcome the shortcomings of conventional water-based polyurethane such as low hardness, poor heat resistance and water resistance

However, most of the predecessors directly used the mixture of rosin. The structure of rosin can only be used as an end-capping agent to connect to the end of the molecular chain, so that the performance of rosin cannot be fully reflected.