General composition of paint

The composition of a general coating contains four types of components: a film-forming substance, a pigment filler, a solvent, and an auxiliary agent. A brief description of the following film forming materials: film-forming material is the basis of the composition of the coating, which plays a decisive role in the nature of the coating. There are many varieties of film-forming substances that can be used as paints, which can be divided into two major categories: transformed and non-converted. The conversion coating film forming materials mainly include dry oils and semi-dry oils, two-component amino resins, polyurethane resins, alkyd resins, thermosetting acrylic resins, phenolic resins, and the like. The non-transformation coating film forming materials mainly include ***, chlorinated rubber, asphalt, modified rosin resin, thermoplastic acrylic resin, vinyl acetate resin, and the like.

B. Filler: Pigments can make the paint show a rich color, make the coating have a certain hiding power, and have the effect of enhancing the mechanical properties and durability of the coating film. There are many types of pigments, and care should be taken in selecting the different properties and uses required when preparing coatings. Filler can also be called as constitution pigment, which is characterized by basically no hiding power, and plays a major role in the coating. Fillers can reduce coating costs, increase the thickness of the coating, and enhance the mechanical properties and durability of the coating. Commonly used fillers include talcum powder, calcium carbonate, barium sulfate, silicon dioxide, and the like.

C Solvents: In addition to a few solvent-free coatings and powder coatings, solvents are an integral part of coatings. Commonly used organic solvents are mainly aliphatic hydrocarbons, aromatic hydrocarbons, alcohols, esters, ketones, halogenated hydrocarbons, terpenes, and the like. The proportion of solvents in paints is mostly over 50%. The main role of the solvent is to dissolve and dilute the film, so that the paint is easy to form a perfect paint film during construction. After the paint is applied, the solvent is generally evaporated to the atmosphere and rarely remains in the paint film. In this sense, the solvent in the coating is not only a great pollution to the environment, but also a great waste of resources. Therefore, the modern paint industry is striving to reduce the amount of solvent used, and has developed environmentally friendly coatings such as high solids coatings, waterborne coatings, latex coatings, and solvent-free coatings. Many of the company's coatings are environmentally friendly coatings.

D additives: The image says that the role of additives in coatings is equivalent to the effect of vitamins and trace elements on the human body. The amount is small, the role is very important and indispensable. There are four major types of modern paint additives:

(1) Additives that act on the paint production process, such as defoamers, wetting agents, dispersant emulsifiers, etc.

(2) Additives that act on the paint storage process, such as anti-settling agents, stabilizers, and anti-skinning agents.

(3) Additives that act on the coating process, such as leveling agents, defoamers, driers, and anti-sagging agents.

(4) Additives that act on the properties of the coating, such as plasticizers, matting agents, flame retardants, and mildewproofing agents.