When people buy paints and coatings, they usually have sets of paint and coating thinners. Generally, anticorrosive paint thinners are volatile liquids used to dissolve and dilute paint. It can be used to adjust the viscosity of the paint to suit the painting requirements. Paint thinner often consists of a solvent and a thinner, and sometimes a portion of a co-solvent is added. Can dissolve other substances known as solvents, then, the following together to understand how to correctly select and use anticorrosive paint thinner!

Coating thinner is mainly a variety of organic liquids that can dissolve grease, paint, resin, cellulose and other film-forming substances, is the main component of the thinner. The co-solvent itself on the film-forming substances do not have the ability to dissolve, and some kind of solvent in the appropriate proportion when mixed, can enhance the solubility of the solvent. Only part of the coating products (such as nitro paints, etc.) use solvents need to add co-solvents. Although diluents cannot dissolve film-forming substances, they can be used together with solvents for coatings without harmful effects. Thinners are applied mainly to regulate the evaporation rate of the thinner and to reduce its cost.

Solvents, co-solvents and paint thinners are not definite. The same organic substance can be a solvent for one type of coating, but a co-solvent or thinner for another. For this reason, they are often collectively referred to as organic solvents, whereas a thinner is really just a solvent mixture. For specific varieties, it is important that the proportion of solvents, diluents and co-solvents in their composition is appropriate, especially with regard to the type and amount of solvents and diluents used in the coating. Only then can they be formulated.

When formulating paint thinner, due to the great difference in solubility and volatility of various organic solvents, it is necessary to apply the solvent theory (principle of similar polarity, principle of solventization, principle of solubility parameter) according to the composition and performance of various paints. Therefore, different coatings with different diluents. For the same paint, the composition of the thinner varies depending on the season and climate. The thinner will dry out slightly. Therefore, it is not advisable to use summer paint thinner products in winter, otherwise it will cause bottoming and other paint film defects due to slow drying.

At present, there are many poor-quality paint thinner on the market, although inexpensive, but they have different components, relatively toxic odor, volatilization rate is too fast, solubility is extremely poor, not only seriously affecting the health of the construction workers, but also prone to the following problems: paint film disease:

1, poor hiding power: the thickness of the paint film is too thin, through the paint film can see the color of the underlying surface.

2, loss of light: paint film before drying full of luster, after drying lack of luster or later paint film luster gradually disappear.

3, orange peel: paint film surface uneven, similar to the appearance of orange peel, grapefruit peel.

4, fogging / spots (silver paint spots): silver paint color changes, the formation of dark or light-colored patches, often along the direction of the painting to form different color stripes. 5, pinhole (pothole): paint after painting, due to the rapid evaporation of the thinner, the paint can not be replenished in time, resulting in pinhole-like holes or lenticular.

6, prickly heat (solvent bubbles): due to the thinner evaporates too quickly, the water vapor penetrates into the paint film, resulting in small bubbles and bubble marks in the top coat.

7、Fogging / fogging: milky white mist appears on the surface of the paint film.

8, dripping, sagging, tearing: paint in the coating and drying process, the vertical surface of too much paint to form a top-to-bottom hanging or make the lower edge of the film thickening phenomenon.

Therefore, the correct choice and use of regular manufacturers with paint thinner, not only can make the paint film has a good appearance, but also because of its volatilization rate matched with the paint, you can ensure that the appearance of the paint film after painting, and at the same time to avoid construction. Some of the resulting disadvantages.