To find the composition of the paint, it is necessary to analyze the composition of the paint

Your question is very general.

There are many kinds of lacquer, so I don't know what kind of paint you want.

Generally speaking, there is.

1.The main film-forming substance: called binder, adhesive or curing agent, its function is to bond other components in the coating together, and can firmly adhere to the surface of the base layer to form a continuous, uniform, tough protective film.

It has high chemical stability and certain mechanical strength. (At present, the film-forming substances used in China's architectural coatings are mainly synthetic resins.) ）

2.Secondary film-forming substances: refers to the pigments and fillers used in the coating, which are the components of the coating film, and are evenly dispersed in the coating medium in the form of fine powder, giving the coating film color and texture, so that the coating film has a certain hiding power, reducing shrinkage, and can also increase the mechanical strength of the film, prevent the penetration of ultraviolet rays, and improve the anti-aging and weather resistance of the coating film.

There are many varieties of pigments, which can be divided into artificial pigments and natural pigments; According to its function, it can be divided into coloring pigments, anti-rust pigments and physical pigments (i.e., fillers).

The main role of fillers is to improve the coating performance of the coating and reduce costs.

Solvent, also known as diluent, is the volatile component of the coating, its main function is to make the coating have a certain viscosity to meet the requirements of the construction process.

Commonly used solvents are rosin perfume, alcohol, No. 200 solvent gasoline, benzene, xylene, acetone, etc.

Auxiliary materials, also known as additives, are substances added in the preparation of coatings in order to further improve or increase some properties of coatings, and their dosages are small, generally accounting for only a few percent to a few ten-thousandths of the total amount of coatings, but the effect is significant. Commonly used additives are as follows:

1) Hardener, desiccant, catalyst, etc.

2) Plasticizers, brighteners, ultraviolet absorbers, antioxidants, etc.

3) Antifouling agents, antifungal agents, flame retardants, insecticides, etc.

In addition, there are dispersants, thickeners, antifreeze, rust inhibitors, fragrances, etc.

The main components of paint include the following five parts:

Oilseeds: including dry oil and semi-dry oil, which is one of the main film-forming substances.

Reins: including natural resins and artificial resins, which are also part of the main film-forming substances.

Pigments: including coloring pigments, physique pigments and anti-rust pigments, there are quite a variety of specific varieties, which are secondary film-forming substances.

Thinner: including solvent and diluent, used to dissolve the above substances and adjust the consistency, as an auxiliary film-forming substance.

Excipients: including driers, curing agents, plasticizers, and moisture-proof agents. It is also an auxiliary film-forming substance.

The formula ratio of paint thinner, in general, is 2:1:, 2 refers to the paint ratio, 1 refers to the curing agent, refers to the thinner.

In the process of paint and thinner ratio, it is necessary to reinforce the chemical agent, because when adding paint and thinner, it may not be possible to grasp the completely standard amount, so it is possible to add too much diluent, or too little paint to add, which will appear in various situations after adjustment, so you can use the curing agent to adjust, so that they can maintain a balanced state and facilitate use.

Classification of architectural paints and coatings.

1. Natural lacquer (also known as national lacquer, lacquer): there are raw lacquer and cooked lacquer. The natural paint film is tough, durable, acid-resistant, heat-resistant, and glossy.

2. Oil paints and coatings: clear oil (commonly known as cooked oil, fish oil): made of refined dry oil with driers, often used as waterproof or moisture-proof coatings, and used to modulate original paint and blended paint, etc.; oil-based thick paint; Oil-based blending paint.

3. Resin paints and coatings: varnish (resin paint); Enamel; varnish (commonly known as Lac); spray paint (nitro paint); Blended paint: It is made of dry oil, pigment, solvent, drier, etc.

Paint is a type of paint that is made up of a mixture of ingredients, the basic components of which include pigments, resins, and solvents. Pigments are usually hard pigments, such as lead white, zinc oxide and titanium dioxide, which have good hiding and gloss. The stalking resin acts as a binder, binding the pigment and forming a film of paint.

A variety of resins can be used in paint production, including acrylics, phenolics, and epoxies. Solvents are used to dilute the pigment and resin mixture for ease of application and to affect the drying time and the degree of shine of the paint.

The composition of paint includes not only pigments, resins and solvents, but also some additives such as desiccant, leveling agent and protective agent. The desiccant increases the drying speed of the paint, the leveling agent improves the gloss and smoothness of the paint surface, and the protective agent makes the paint have waterproof, anti-corrosion and anti-aging properties.

In the oil paint manufacturing process, a mixture of resin and pigment is dissolved in a solvent that can be easily applied to the surface of the object to be painted using a roller or brush.

In summary, paints contain a variety of complex chemical components, among which pigments, resins, and solvents are the basic components that make up paints. Additives may also play a key role in different paints. Knowing the composition of paint helps us choose the right paint to ensure that it has anti-aging, moisture-resistant and other properties.

Regardless of the variety or form, paint is composed of three basic substances: film-forming substances, secondary film-forming substances and auxiliary film-forming substances

1.Film-forming substances: also known as binders, most of the film-forming substances are organic polymer compounds such as natural resins (rosin, lacquer), coatings (tung oil, linseed oil, soybean oil, fish oil, etc.), synthetic resins and other mixed ingredients, which are formed by high-temperature reactions, and there are also inorganic combinations of paints (such as:

inorganic zinc-rich paint).

2.Secondary film-forming substances: including various pigments, physique pigments, and anti-rust pigments. Pigments provide color and hiding power for paint films, improve the protective properties and decorative effects of paints, and pigments with good weather resistance can improve the service life of paints.

3.Auxiliary film-forming substances: including various additives, solvents, and various additives play a very important role in the production process, storage process, use process, and the formation process of paint film. Although the amount used is very small, it has a great impact on the performance of the paint film.

The chemical composition of each lacquer is different.

( ) Pigment (one of the two non-volatile film-forming ingredients in paint, which provides color and durability to the paint and is able to mask the coating underneath. It can also improve surface strength and adhesion, and improve paint gloss.

The size and shape of the pigment particles are also important, the size of the particles has an impact on the ability to cover, and the shape of the particles has an impact on the strength of the paint finish. These particles are roughly spherical, and some are also rod-shaped, and rod-shaped particles can increase the strength of the paint film.

Fig. 2 ( ) Adhesive It is another non-volatile film-forming ingredient in paint, which is the main component of paint, which can give pigments a liquid form, durability, and the ability to adhere to metal surfaces.

The adhesive is generally composed of vegetable oil, natural resin (rosin, etc.) or synthetic resin (PVC, etc.), which determines the type of paint because it directly affects the drying mechanism. Adhesives are typically modified with reinforcing agents and catalysts to improve durability, adhesion, corrosion resistance, and abrasion resistance.

Solvents Most solvents are extracted from petroleum, which is a volatile ingredient in paints. The main function of the solvent is to make the paint properly applied to the surface of the adherent, so it must have sufficient solubility to partially dissolve the adhesive so that the pigment is evenly dispersed in the adhesive. This facilitates a more precise dispensing of colors, and high-quality solvents also improve the quality of the finish and the properties of the paint film.

In addition to the solvents already present in paint, there are also dilution solvents that are used in combination with painting, and if used in conjunction with enamel paint, this combination solvent is called a reducing agent.

Fig. 4 ( ) Additives Although additives account for a small proportion of paints, they have many important functions, such as some additives can change the speed of paint drying and paint gloss, and some additives have the comprehensive function of wrinkle removal. Additives that accelerate paint drying are called hardeners, and additives that reduce the gloss of paint surfaces are called matting agents.