In our daily life, paint can be seen everywhere, especially in decoration, paint is an indispensable building material, so do you know anything about painting?

What is the composition of paint?

Generally speaking, it is a material that can be coated on the surface of the object to be coated and can form a continuous film with firm adhesion. Paint is a coating made of raw materials such as iron oxide or resin for decoration and protection.

Whether the traditional coating products use natural substances as raw materials or the modern development of coating products based on synthetic chemical products, all belong to organic chemical polymer materials, and the film formed belongs to the type of polymer compounds.

No matter what the variety or shape of paint is, it is composed of three basic materials: film-forming material, secondary film-forming material and auxiliary film-forming material.

Film-forming materials: most of the film-forming materials are organic polymer compounds such as a natural resin (rosin, lacquer), coatings (tung oil, linseed oil, soybean oil, fish oil, etc.), synthetic resin and other mixed ingredients, which are formed by high temperature reaction.

There are also inorganic paints (such as inorganic zinc-rich paint). It is the main body of the paint and determines the performance of the paint film. If there is no film-forming material, simple pigments and auxiliary materials can not form a paint film.

Secondary film-forming substances: including various pigments, physical pigments, and anti-rust pigments. Pigments provide color and hiding power for paint film, improve the protective performance and decorative effect of paint, and pigments with good weather resistance can improve the service life of the paint.

Physical pigments can increase the thickness of the paint film, make use of the performance of its "flake-like, needle-like" structure, form a fish-scale paint film through the stacking of pigments, improve the service life of the paint film, and improve the waterproof and anti-rust effect.

Antirust pigments prevent the surface of objects from being corroded by the atmosphere and chemicals and metal surfaces from being corroded by their own physical and chemical antirust effects.

Auxiliary film-forming materials: including various auxiliaries and solvents. Various auxiliaries play a very important role in the production process, storage process, use process and film formation process of paint.

Although the amount used is very small, it has a great influence on the performance of the paint film. Even can not form a paint film such as: do not dry, bottom caking, crust. Water-based paint needs more auxiliaries to meet the production, construction, storage and formation of the paint film.

Paint has a special smell, and the most harmful to the human body is colorless and tasteless formaldehyde, which is generally contained in glue, such as artificial panels, all kinds of aging plastics, etc., the production of new furniture, metope, floor decoration and laying, should use adhesives.

Where a large number of adhesives are used, there will always be formaldehyde release. Therefore, when selecting materials, it is best to choose solid wood furniture or metal doors and windows.

When you have no choice but to use an adhesive, try to use a high level of environmental protection and release less formaldehyde.

At present, environmental protection paint is relatively safe in the market, which refers to the coating products whose performance index and safety index meet the technical requirements of the national environmental label products on the premise of meeting the respective product standards.

It is not that there is no formaldehyde at all, but the content of formaldehyde and benzene in the environmental protection paint is lower than that of the general paint, which is relatively less harmful to the human body, so it is called environmental protection paint.