Waterborne high-corrosion-resistance polyester coating and preparation method thereof

Abstract

The invention discloses a water-based high-corrosion polyester coating, which is composed of the following raw materials in parts by weight: guaiacol 0.1-0.2, calcium benzoate 2-3, sodium diacetate 1-2, polybenzo Imidazole 3‑4, sucrose acetate isobutyrate 0.2‑0.4, rosin 35‑40, fumaric acid 8‑10, 20‑30% sodium hydroxide solution 6‑7, ethylene glycol 20‑34, antimony trioxide 0.1-0.2, sodium polyacrylate 2-3, zinc chloride 13-20, polyether diol 80-90, toluene diisocyanate 100-130, 2,2-dimethylolpropionic acid 2-3, diglycol Alcohol 4‑5, Triethylamine 1‑2, 2‑Mercaptobenzimidazole 0.2‑0.4, Hexabromocyclododecane 0.7‑1, Monobutyltin Oxide 1‑2, Tetrabutylammonium Bromide 2‑3 . The guaiacol, calcium benzoate, sodium diacetate, polybenzimidazole and the like added in the invention can effectively improve the anticorrosion performance of the finished coating.

Description

technical field [0001] The invention relates to the technical field of polyester coatings, in particular to a water-based high-corrosion 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...

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, and 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;