Ultra-low VOC air-drying poly-aspartic paint for engineering machinery

Abstract

The invention relates to an ultra-low VOC air-drying poly-aspartic paint for engineering machinery. The poly-aspartic paint comprises a component A and a component B, wherein the component A comprises the following raw materials: 25 to 37 parts of polyaspartic ester a, 15 to 23 parts of polyaspartic ester b, 30 to 40 parts of pigments and fillers, 3 to 10 parts of one or more additives, and 0 to 15 parts of one or more solvents; the polyaspartic ester a and the polyaspartic ester b are Bayer NH1420 / NH1520, or Zhuhaifeiyang F420 / F520; the mass ratio of the polyaspartic ester a to the polyaspartic ester b is (1 to 2):1; the component B comprises the following raw materials: 50 to 70 parts of HDI uretdione isocyanate, 30 to 40 parts of HDI tripolymer isocyanate, 0 to 3 parts of one or more additives, and 0 to 5 parts of one or more solvents; the mass ratio of HDI uretdione isocyanate and HDI tripolymer isocyanate is (1.5 to 2):1; the equivalence ratio of the component B to the component A, that is, -NCO of the component B to -OH of the component A, is 1.05:1. The poly-aspartic paint provided by the invention is ultra-low in VOC, fast in air drying and film formation, and excellent in coating appearance and performance, and suitable for being applied to environment-friendly one coat paint or finishing coat paint.

Description

[technical field] [0001] The invention relates to asparagus paint, in particular to a very low VOC self-drying polyaspartate paint for engineering machinery [Background technique] [0002] At present, except for a small amount of electrophoretic coatings and powder coatings used for thin plate parts, most of the coatings for construction machinery are ordinary solvent-based coatings. Each liter of coating uses about 0.6 liters of solvent, and the limited recovery of organic solvents cannot be realized in the spray booth. Direct emissions, resulting in extremely high VOC content. With the gradual enhancement of environmental protection awareness and the introduction of VOC consumption tax, environmentally friendly coatings have become an inevitable trend of development. Due to the large and complex characteristics of engineering machinery structural parts, UV light-cured coatings and powder coatings cannot meet their needs. Water-based coatings and high-solid coatings have b...

AI Technical Summary

Problems solved by technology

However, due to the high surface tension of high-solid coatings, fast curing and film formation, and most of them use high-pressure airless spraying methods, there are many defects in the individual performance and appearance quality of the coatings. Therefore, technical breakthroughs are still needed

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