Does water based paint belong to the paint category? What is the classification of water based paint

Paint is defined as: a chemical mixture coating that can firmly cover the surface of an object for protection, decoration, signs and other special purposes (encyclopedia).

Water-based paint naturally belongs to paint. In addition, water-based paint does not mean that the paint components are completely free of organic components

Water-based paints consist of solids (resins, polyesters), organic solvents (contained in solvents, additives, pigments, etc.) and solvent waters. However, compared with oil-based paint, the proportion of organic components in water-based paint is very small, and generally after water-based paint is sprayed, the direct discharge concentration of VOCs (or NMHC) in the paint exhaust gas can reach the national standard.

Water-based paint is water-based as a thinner, oil-based paint is a thinner material, water-based paint is safe and environmentally friendly, no pollution, oil-based paint contains benzene, toluene, xylene, formaldehyde, etc., which is very harmful to the body!

It should be counted. The solvent of water-based lacquer is water.

We will use paint more or less in decoration, and the paint is also divided into many kinds, which can be divided into two kinds of water-based paint and oil-based paint from the state.

1. What is water-based paint?

Introduction: Water-based paint is mainly made of water as a thinner, and there are fewer harmful substances. However, its paint film hardness and wear resistance are somewhat inferior, so you envy generally makes more decorative coatings, such as the most commonly used latex paint.

Features: harmless to the human body, does not pollute the environment, the paint film is plump, crystal clear, flexible and has water resistance, wear resistance, aging resistance, yellowing resistance, fast drying, easy to use, etc.

Second, the classification of water-based paint.

1. Water-soluble.

In the process of production, a certain amount of water-soluble resin is added, and the two are fused to produce water-based paint with good air permeability and rich and diverse colors.

2. Water dilution type.

Water dilution type refers to the paint prepared by the post-emulsion emulsion for the film-forming substance, so that the solvent-based resin is dissolved in the organic solvent, and then with the help of the emulsifier, the resin is dispersed in the water with the help of strong mechanical stirring, so as to form an emulsion, which is called the post-emulsion emulsion, and the paint made can be diluted with water during construction.

3. Water dispersion type.

The water-dispersible type mainly refers to the lacquer prepared with a synthetic resin emulsion as a film-forming material. In the presence of emulsifier, in the process of mechanical stirring, the small particle clusters formed by the polymerization of unsaturated vinyl monomer at a certain temperature are dispersed in water to form a dispersed emulsion. Lacquer prepared by adding a small amount of emulsion to water-soluble resin cannot be called latex paint.

Strictly speaking, water-diluted paint cannot be called latex paint, but it is customary to classify it as latex paint.

There are different classifications of water-based paint, using the components of water-based paint, which can be divided into the above three types.

Water-based paint is made of water as the dispersion medium, using multiple anti-rust mechanisms such as physics and chemistry, and formulated according to chemical principles such as chemical transformation and complexation reaction. It is the best replacement product for traditional anti-rust primer.

It is widely used in all kinds of automobiles, ships, grids, machinery manufacturing, containers, railways, bridges, boilers, steel structures, petrochemical equipment and other anti-corrosion protection, which is incomparable to solvent-based paints.

The water-based paint adopts a new generation of water-based resin, which greatly improves the physical performance index on the basis of the original water-based polyurethane paint. It only takes 10 minutes for the paint surface to dry at room temperature, which solves the defects of slow drying and long recoating time of other brands of water-based paint, and greatly improves the work efficiency.

Development stage. Generally speaking, water-based paint technology has gone through the following three stages:

The first generation of water-based paint uses acrylic as the main raw material, and its advantages are water resistance and good weather resistance. Its disadvantage is that the comprehensive performance is average, the chemical properties are relatively low (such as poor alcohol and alkali resistance), and the physical indicators such as hardness and wear resistance are low, which is why most people think that water-based paint is not good.

The second generation of water-based paint with acrylic acid and water-based polyurethane composite as the main raw material, not only inherits the advantages of the first generation of acrylic products with good weather resistance and good construction tolerance, but also improves the hardness of water-based paint, but the chemical properties are still relatively low, and only a few domestic enterprises can produce, which is a mid-range product in water-based paint.

The third generation of water-based paint with acrylic modified water-based polyurethane as the main raw material, on the basis of the second-generation water-based paint products, the comprehensive performance of the product is greatly improved, and the hardness of the pencil method test can reach more than 2h, which fully meets the daily needs; The abrasion resistance even exceeds that of oil-based paint, and it has obvious advantages in terms of service life and color matching.

More importantly, the chemical properties are stable, and the alcohol and alkali resistance are greatly enhanced compared with the first two, which is a high-end product in water-based paint, and the technology is monopolized by a few manufacturers at home and abroad.