The main chemical components of paint What is the curing agent of paint used for?
release time：
2022-10-17
Paint is a chemical mixture coating that can firmly cover the surface of objects for protection, decoration, signs and other special purposes. The authoritative book "Coating Technology" in China's coating industry defines it as follows: "Coating is a material that can be coated on the surface of objects by different construction techniques to form a firm adhesion, a certain strength, and a continuous Solid film. The film formed in this way is generally called coating film, also known as paint film or coating." What is the main chemical composition of paint? What is the hardener of paint used for?
The main chemical components of paint
Regardless of the type or form of paint, it is composed of three basic substances: film-forming substances, secondary film-forming substances and auxiliary film-forming substances.
1. Film-forming substances
Film-forming substances, also known as binders, are mostly 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 reaction. , There are also paints combined with inorganic substances (such as: inorganic zinc-rich paint). It is the main body of the paint and determines the performance of the paint film.
2. Secondary film-forming substances
Secondary film-forming substances include various pigments, extender pigments, and anti-rust pigments. Pigments provide color and hiding power to the paint film, improve the protective performance and decorative effect of the paint, and pigments with good weather resistance can improve the service life of the paint. Extender pigments can increase the thickness of the paint film, improve water resistance and rust resistance. Anti-rust pigments can prevent the surface of the object from being corroded by the atmosphere and chemical substances, and the metal surface from being corroded.
3. Auxiliary film-forming substances
Auxiliary film-forming substances include various auxiliaries, solvents, and various auxiliaries play a very important role in the production process, storage process, use process, and paint film formation process of the paint. Although the amount used is very small, it has a great impact on the performance of the paint film. Even a paint film cannot be formed, such as: not drying, sinking to the bottom and agglomerating, and crusting.
What is the hardener of paint used for?
Paint curing agent is a material specially used in paint to accelerate paint drying and promote paint drying speed.
1. Physical drying effect: The internal molecules of the paint directly react with the oxygen in the air, so as to achieve the purpose of drying.
2. Chemical curing: The curing agent reacts with the main paint, which can increase the hardness, brightness and adhesion of the paint film, and improve the chemical stability and anti-corrosion ability of the paint. It can make the paint film full and delicate, smooth and elastic, wear-resistant and not easy to scratch.
3. The curing agent can also accelerate the firming of the primer and the panel.
4. Accelerate the curing time of the primer. If the curing time of the primer is slow, it will also delay the time of the topcoat. If time is not urgent, some primers do not add curing agent, and need to wait until the primer is completely dry before topcoating. So also a waste of time.
Paint is an indispensable material for project decoration and home decoration. Knowing the main chemical components of paint and what the curing agent of paint is used for can not only decorate the ideal home style, but also help protect your own health.
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