With the increasing demand of people, some products with single function can no longer meet the requirements. The same is true of paint. . Alkyd resin paint is a kind of paint with alkyd resin made of polyol, polyacid and dry vegetable oil as the main film-forming substance. It has many unique characteristics and is widely used. Not only can it be used alone, but it can also be used with other resins to make coatings with different properties. Next, Bian Xiao will introduce more secrets of alkyd coatings in detail.

Main components of alkyd coatings

The main component of alkyd paint: alkyd resin

Alkyd resin is a polymer formed by polycondensation of polyhydric alcohol, polybasic acid and fatty acid. Alkyd resin has become one of the most widely used synthetic resins because of its mature synthetic technology, easily available raw materials and good comprehensive performance of resin coating? .

Correlation classification

1, solvent alkyd coating

The traditional alkyd resin coating is solvent-based and contains a lot of solvents (the mass ratio is more than 40? %)? Main ingredients: alkyd resin, No.200 solvent gasoline, drier (containing cobalt, manganese, lead, zinc, calcium, or rare earth cobalt and manganese) and anti-skinning agent. Paint also contains pigments and so on. In the process of production and construction, it will seriously endanger the environment and the health of operators. In recent years, the environmental protection laws and regulations of countries all over the world have become increasingly strict, and the traditional solvent-based coatings have been challenged more and more.

The trend of waterborne and high solid coatings is becoming increasingly clear.

2. Water-soluble alkyd coatings

Water-soluble coatings are a kind of coatings in which hydrophilic or water-soluble groups are introduced into film-forming polymers to make them soluble in water. Is it 20? A new type of low-pollution, energy-saving and resource-saving coating developed in 1960s. Because of its obvious advantages, the research and application of water solubility of coatings have received extensive attention and made important progress. Water-soluble alkyd resin coating is a new development trend, which has been studied and developed a lot.

Curing principle

Film Formation by Chain Polymerization —— Oxidation Polymerization Form

The automatic oxidation of unsaturated fatty acid double bonds induces polymerization, forming a network macromolecular structure and curing to form a film. The speed of oxidative polymerization is related to the number and position of functional groups (double bond groups) and the speed of oxygen transfer (using metals such as cobalt, manganese and lead to promote oxygen transfer and improve curing speed). Coatings with similar curing methods include: natural resin coatings containing oil, phenolic resin coatings and epoxy resin coatings.

The above is the content of alkyd resin paint introduced by Bian Xiao today. The so-called know yourself and know yourself, and you will be invincible. The function of coatings is the primary reference factor in selection, so there are many coatings with special functions on the market. Knowing the characteristics and usage of alkyd resin paint, you will be more handy when choosing. Bian Xiao also hopes that everyone can use alkyd paint more rationally and let it bring more beautiful experiences to everyone's life.

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