Method of preparing fluorinated polyurethane paint and fluorinated polyurethane anticorrosive paint

Abstract

The invention provides a method of preparing fluorinated polyurethane paint. The method is characterized by comprising the following steps: a step of preparing a component A, namely adding 15-60 parts of fluorinated polyether polyol and 0.01-0.03 part of dibutyltin dilaurate into a three-necked flask with a stirring rod in sequence, and stirring for 30 minutes to obtain the component A; a step of preparing a component B, namely adding 10-40 parts of 4,4-diphenyl methane diisocyanate and 0-30 parts of collaborative anticorrosive filler into 20-60 parts of a solvent system to stir and dissolve to obtain the component B; and a step of preparing fluorinated polyurethane anticorrosive paint, namely adding the component B into the three-necked flask filled with the component A, stirring for 8-10 minutes, grinding the mixed materials in the three-necked flask until fineness is 40-50 mu m after uniformly stirring, coating a metal sheet with the grinded mixed materials and curing for 24 hours to obtain the fluorinated polyurethane anticorrosive paint.

Description

technical field [0001] The invention relates to industrial chemicals, in particular to a method for preparing fluorine-containing polyurethane anticorrosion paint and the fluorine-containing polyurethane anticorrosion paint prepared by the method. Background technique [0002] Corrosion of materials refers to the damage or deterioration of materials due to environmental effects, which is an irreversible thermodynamic spontaneous process. The direct and indirect losses caused by material corrosion to the economies of countries around the world are staggering. According to statistics, more than 100 million tons of metals are scrapped due to corrosion every year in the world. Therefore, measures must be taken to reduce the loss caused by material corrosion. At present, the most effective, economical and common anti-corrosion method is to apply anti-corrosion coatings on the surface of materials. [0003] Anti-corrosion coatings are an indispensable coating in paints and coati...

AI Technical Summary

Problems solved by technology

There are difficulties in the preparation of the main raw materials required for the introduction of fluorine-containing chain segments into the hard segment. It is difficult to meet the high-quality requirements for fluorine-containing polyurethane coatings prepared by introducing fluorine-containing chain segments into acrylates. It is possible to prepare FPU by introducing fluorine-containing groups into the soft segment main chain. Overcome the defects in the technology of hard segment and acrylate introducing fluorine-containing segment

However, the technical cost of introducing fluorine-containing groups by using the soft segment main chain is relatively high, and generally has the characteristics of high fluorine and high performance, and the prepared FPU anti-corrosion coatings are relatively low in cost performance

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