Resin special for paints resistant to strong corrosion and preparation method thereof

Abstract

The invention relates to a resin special for paints resistant to strong corrosion and a preparation method thereof. The resin is prepared from polyvinyl alcohol, butyraldehyde, a supported heteropolyacid catalyst, ethanol and zinc powder. The method comprises the processes of dissolving, reacting, dehydrating and drying. In the reaction process, the ethanol and zinc powder are added, thus improving the unique attributes of the resin and enabling the resin to have the characteristics of excellent resistance to strong corrosion, strong adhesion, fast drying at normal temperature, high content of zinc powder in paint films, great cathodic protection action, fine antirust property of the materials resistant to liquid corrosion and the like. The neutral supported heteropolyacid catalyst is used instead of an acid catalyst, thus being free from pollution, playing a role of environmental protection, dispensing with washing process and saving abundant water resources. Meanwhile, the reaction is carried out at 30-45 DEG C, thus greatly lowering the production cost.

Description

technical field [0001] The invention relates to an anticorrosion resin, in particular to a special resin for anticorrosion paint. Background technique [0002] Corrosion of metal is a phenomenon in which metal is destroyed by chemical or electrochemical action of environmental medium. The corrosion of metals spreads all over the national economy and brings huge losses to the national economy. In industrially developed countries, the direct economic loss caused by corrosion accounts for 1%-4% of the total output value of the national economy, the annual corroded and rusted steel accounts for about 20% of the output, and about 30% of the equipment is scrapped due to corrosion. In China, the economic loss caused by metal corrosion is as high as 30 billion yuan per year, accounting for 4% of the gross national product, much more than the sum of other natural disasters. Metal corrosion is a relatively serious problem that we are currently facing, especially in many coastal area...

AI Technical Summary

Problems solved by technology

However, due to the use of carbon tetrachloride and other chlorinated hydrocarbons in the production of chlorinated rubber, it will cause certain harm to the atmospheric ozone layer and cause a greater impact on environmental protection, and the pollution produced in the production process is also extremely serious. It is inevitable that chlorinated rubber anti-corrosion paint will be gradually restricted until it is banned. Therefore, it is imminent to develop an environmentally friendly anti-corrosion paint special resin to replace chlorinated polyethylene resin.