Traditional organic solvents such as alkyd, amino, perchloroethylene, nitro, epoxy, polyurethane and thermoplastic acrylic resin coatings cannot be used.

The so-called green paint is the paint that can protect the environment. It is non-toxic and tasteless, and can inhibit the growth of mold.

So, how to identify green paint?

First of all, to buy paint, you should choose a regular sales store and choose the products of well-known manufacturers to see if the paint meets the national mandatory standards. For example, Dulux, Nippon, Fenlin, Du Fang, Dupont, Fuya, Levi's, Fleiger, Nader and many other paint brands are well-known manufacturers' products sold in regular stores, and consumers can buy them with confidence.

Secondly, we should carefully check the product quality inspection report, especially the VOC content in the quality inspection report. The national standard stipulates that the VOC limit should not exceed 200 grams per liter, the better paint is below 100 grams per liter, and the environmental protection paint is close to 0.

If possible, please open the paint bucket and test it yourself. If there is serious stratification, the quality is poor; Stir gently with a stick, and the coating stays on the stick for a long time after lifting, covering evenly, indicating good quality; Gently twist with your hands, the thinner the better. The latex paints for the interior walls of Fule Pavilion and Master are sold with open covers, so that consumers can intuitively feel their unique environmental protection.

In addition, it should be noted that most environmentally-friendly coatings will have a pungent smell because of excessive VOC, formaldehyde and other harmful substances, so be careful when choosing. Of course, don't buy products that smell good. Generally speaking, this kind of paint adds essence, and the additive itself is a chemical product, so it is difficult to ensure environmental protection.

Dulux, Nippon, Fenlin, Du Fang, Dupont, Fuya, Levi's, Fule Pavilion, Longpai, Adilan, nart, Milton, Fulang, Dabao, Onide and Xiaoyun are all green paints. For example, Nippon all-in-one interior wall latex paint will form a protective film of silver ions and zinc ions on the wall after drying, which can inhibit the metabolism of bacteria attached to the wall and comprehensively care for the health of residents. Fuya Super Antibacterial 6-in-1 1 Wall Paint VOC content is close to 0, which is super environmentally friendly.

Among ecological coatings, the most famous brands are Milton, Levi's, Asahi and Xiaoyun. The nano interior wall coating of Milton Kang Jie's room can generate negative ions under photocatalytic conditions. After Xiaoyun8-1eco-paint is coated, water molecules in the air collide with negative ions in the paint through the gap of polymer film, thus increasing the concentration of negative ions in the air and improving the indoor environment.

Regarding the definition of green paint, Professor Tsinghua University Hong thinks it should be divided into three levels.

The first level is the total organic volatile matter content (VOC) of coatings: organic volatile matter causes direct harm to our environment, our society and human beings. Paint is the second largest pollution source in modern society. The first pollution source is brought by the transportation industry, such as automobile exhaust and oil infiltration. Therefore, people pay more and more attention to the pollution of coatings to the environment. 1967, 66 laws and regulations were implemented in Los Angeles, USA to limit the solvent capacity of coatings. Since then, the amount of solvents used in coatings abroad has become more and more strict. At first, only some solvents that can react photochemically were limited. Later, it was found that almost all solvents can react photochemically except water and acetone. Therefore, some commonly used solvents such as toluene, xylene, butanone, acetate, etc. Limited, and ethanol is no exception. In a word, we should try to reduce the amount of these solvents.

The second level is the toxicity of solvents: that is, those solvents that can cause diseases after contact with human body or inhalation. It is well known that benzene and methanol are toxic solvents. Ethylene glycol ether used to be a common solvent for waterborne coatings. In the 1970s, it was widely used as a non-toxic solvent, but in the early 1980s, it was found that ethylene glycol ether was a highly toxic solvent. At that time, the use of this solvent in the laboratory was strictly prohibited. For example, polyvinylpyrrolidone is an artificial plasma, and its monomer vinylpyrrolidone was once considered as a non-toxic chemical. Introduced into the field of photocurable coatings in the late 1980s, it is considered as a reactive monomer with high dilution efficiency and fast polymerization speed, and the paint film obtained by using it as reactive diluent has excellent performance. But it was soon found to be a carcinogen, so it was forbidden to use it. Toxic solvents will cause direct harm to production and construction personnel.

The third level is the safety of users: generally speaking, after the paint is dried, its solvent can basically volatilize, but there is a process, especially for the paint cured at room temperature, some solvents volatilize slowly. Although the amount of these solvents is not large, due to the long-term contact of users, if the solvent is toxic, it will also cause harm to human health, so the use of toxic solvents must be restricted during preparation.