What is the role of coatings? What is the role of paint coating

Tracy Lonely - Manager Level 4" Please specify when quoting someone else's

The main function of exterior wall coating is to decorate and protect the exterior wall of the building, so that the appearance of the building is beautiful and tidy, so as to achieve the purpose of beautifying the urban environment. At the same time, exterior wall coatings can also play a role in protecting the exterior wall of the building and prolonging its service life. In order to obtain the ideal decorative and protective effect, the exterior wall paint should have the following characteristics:

1. Good decoration: the exterior wall coating is required to be rich in color and excellent color retention, and can maintain the original decorative performance for a long time.

2. Good weather resistance: exterior wall coatings, because the coating is exposed to the atmosphere, must withstand the effects of wind, sun, salt spray corrosion, rain, cold and heat changes, etc., under the long-term repeated action of these external natural environments, the coating is prone to cracking, chalking, peeling, discoloration and other phenomena, so that the coating loses its original decorative protection function. Therefore, it is required that the coating of the exterior wall should not be damaged within the specified service life.

3. Good stain resistance: due to the large differences in environmental conditions in different regions of China, for some cities with developed heavy industry and mining, due to the large amount of dust and other suspended substances in the atmosphere, the easily stained coating will lose its original decorative effect, thereby affecting the appearance of the building. Therefore, exterior wall coatings should have good stain resistance, so that the coating is not easy to be polluted or easy to clean off after contamination.

4. Good water resistance: exterior wall paint finishes are exposed to the atmosphere and will often be washed by rain. Therefore, the exterior wall paint coating should have good water resistance.

5. Good mildew resistance: exterior wall paint finishes are prone to mildew in humid environments. Therefore, it is required that the coating film inhibit the growth of mold and algae.

In addition, according to the different design function requirements, higher requirements are also put forward for exterior wall coatings: such as in the application of various exterior wall external thermal insulation system coatings, the exterior wall coatings are required to have good elastic elongation, so as to better adapt to the cracking of the surface layer due to the deformation of the base layer, and have a covering effect on the small cracks of the base layer; For the exterior wall coating of the anti-aluminum composite panel decorative effect, it should also have a better metal texture, ultra-long outdoor durability, etc.

The main function of exterior wall coating is to decorate and protect the exterior wall surface of the building, so that the appearance of the building is clean and beautiful, so as to achieve the purpose of beautifying the urban environment. At the same time, it can play a role in protecting the exterior wall of the building and prolong its service life. In order to obtain the ideal decorative and protective effect, the exterior wall paint should have the following characteristics.

1. Good decoration: the exterior wall coating is required to be rich in color and excellent color retention, and can maintain the original decorative performance for a long time.

2) Good weather resistance Exterior wall coatings are mainly used outdoors, and their coatings are exposed to the atmosphere, and they must withstand the effects of sunlight, rain, sand, cold and heat changes, etc., under these external actions, the coating is prone to cracking, chalking, peeling, discoloration and other phenomena, so that the coating loses its original decoration and protection function. Therefore, as an exterior wall coating, its coating is required to avoid the above-mentioned damage within the specified number of years, that is, it has good weather resistance.

3) Good stain resistance Due to the poor environmental conditions in China, generally speaking, the environmental pollution is more serious, the dust and other suspended substances in the atmosphere are more, and it is easy to stain the coating, so the coating will lose its decorative effect and become unrecognizable, which seriously affects the appearance of the building. Therefore, it is required that the exterior wall decorative coating is not easy to be stained by these substances, or can be easily removed after staining.

4) Good water resistance Exterior wall paint finishes are often washed by rain when exposed to the atmosphere, so exterior wall coatings should have good water resistance, and some elastic exterior wall coatings are required to have better waterproof performance. When micro-cracks occur in the base wall, the coating film remains intact and has a waterproof function.

5. Good mildew resistance: exterior wall paint finishes are prone to mildew in humid environments. Therefore, it is required that the coating film inhibit the growth of mold and algae.

Coating is a material that is used to coat the surface of objects to form a coating film, so as to protect, decorate, sign and other special functions (such as electrical insulation, antifouling, drag reduction, heat insulation, radiation resistance, electrical conductivity, magnetic conductivity, etc.). Therefore, it has been more and more widely used in industry and agriculture, national defense, scientific research and people's lives.

In the past, the total material was processed from vegetable oil and natural resin, which was often called paint. With the development of industry, the variety of coatings is increasing, the quality and performance are constantly improving, and many new coatings no longer contain oil components. In this way, the term paint is not precise enough.

For this reason, the various materials used to coat the surface are now collectively referred to as coatings. With the development of science and the wide application of various polymer synthetic resins, the coating products have undergone fundamental changes, so the accurate name should be "organic coatings".

Due to its advantages of convenient construction, low cost and high added value, coatings have been widely used in various industries such as agriculture, national defense, scientific research, construction, machinery, electronic appliances, food packaging, etc. According to incomplete statistics, there are thousands of varieties of paint products in the world, in 1999 the National Bureau of Statistics of China announced, China's paint output of 10,000 tons per year, in 2000 has reached 10,000 tons per year, ranking third in the world. The development of coatings is changing with each passing day and has become one of the important fine chemical products.

With the development of coating performance, its application is becoming more and more extensive. To sum up, its uses are mainly as follows.

1.Protective. Coatings can form a protective film on the surface of objects, which can prevent or delay metal rust, wood corrosion, cement weathering and other damage caused by long-term exposure to air by moisture, air, microorganisms, etc.

For example, the life span of a steel bridge without paint protection is only a few years; And the paint can stand tall for a hundred years when used properly.

2.decorative role. With the improvement of people's living standards, the criteria for selecting goods are not only limited to their quality, but also their appearance has attracted more and more attention. Therefore, the decorative properties of coatings have also become an important factor in the development of varieties.

3.Color marker function. Internationally, the use of paint as a symbol of color has gradually been standardized.

Paint can be used to mark all kinds of chemicals, dangerous goods containers, all kinds of pipelines, machinery and equipment can also be marked with various colors of paint, such as hydrogen cylinders are green, chlorine cylinders are yellow; In transportation, different colors are also commonly used to indicate warning, danger, forward, stop and other signals to ensure safety.

4.Special functional role. Coatings can play a role in many special functions, such as electrical insulation, conductivity, shielding electromagnetic waves, and anti-static generation in terms of electrical properties; high temperature, room temperature and temperature markings in terms of thermal energy; Absorbs solar energy and shields rays; Anti-slip, self-lubricating, anti-chipping and splashing in terms of mechanical properties; It also has various functions such as noise prevention, vibration damping, sanitation and disinfection, frost prevention, and ice prevention.

The first is the protection function.

Anti-corrosion, waterproof, oil-proof, chemical-resistant, light-resistant, temperature-resistant, etc. Objects are exposed to the atmosphere and are eroded by oxygen and moisture, resulting in metal rust, wood decay, cement weathering and other damage phenomena. Coating the surface of the object to form a protective film can prevent or delay the occurrence and development of these damages, so that the service life of various materials can be extended.

Therefore, the protective effect is one of the main functions of the coating.

The second is the decorative function.

Color, gloss, pattern, flatness, etc. Objects of different materials can be coated with paint, which can get a colorful and colorful appearance, play a role in beautifying the living environment of human beings, and make contributions to the material life and spiritual life of human beings that cannot be ignored.

And then there are the other features.

Marking, anti-fouling, insulation, etc. For modern coatings, this role is increasingly important compared to the first two. Some modern paint varieties offer a variety of different special features, such as:

Electrical insulation, conductivity, shielding electromagnetic waves, anti-static generation, etc.; biochemical effects such as anti-mildew, sterilization, insecticide, and anti-adhesion of marine organisms; High temperature resistance, heat preservation, temperature indication and temperature marking, prevention of flame retardation, ablation and heat insulation; the role of optical properties such as reflecting light, luminescence, absorption and reflection of infrared rays, absorption of solar energy, shielding of rays, and color of signs; Anti-slip, self-lubricating, anti-chipping and splashing and other mechanical properties; There are also various functions such as noise prevention, vibration reduction, sanitation and disinfection, condensation prevention, and ice prevention.

Hello, varnish can be applied to the surface of furniture, and after drying, it will form a smooth and transparent film, which has the effect of moisture-proof, wear-resistant, and insect-proof; Varnish can be applied to the surface of doors, windows, cars, bicycles, etc., and after the paint surface dries, a thin film will be formed, which can play an anti-oxidation role. In addition, the varnish can also be used for gouache drawings or fixed sketches, and can also play an anti-oxidation role.

Hope the above answers can help you.

The simple explanation is decoration, protection and other special roles, details can be consulted by the President of the Coating Chamber of Commerce --- Changsha Haodu Coatings.

Beautify the walls! Make the walls smoother....

The main thing is the role of decoration and protection.

What is the purpose of dressing?

Summary. Hello and glad to your question What is the role of paint coating: Definition of coating:

Paint is generally in a liquid state, it is sprayed or brushed on the coated object, and the solvent volatilizes to form a coating film, which can protect the coated object and show its appearance. The purpose of painting: Painting is to protect the object to be painted, so that it has a value or identification effect.

Dear, hello and glad to ask your questionWhat is the function of coating coating: Definition of coating: Coating is generally in a liquid state, it is sprayed or brushed on the coated object, and the solvent volatilizes to form a coating film, which can protect the coated object and show its appearance effect.

The purpose of painting: Painting is to protect the object being painted, so that it can produce values or identify the hand.

Extended information: 1. Protection: Most of the main materials of the car structure rental hall are steel plates, if it is only steel plates, it will combine with oxygen and water vapor in the air to produce oxidation and rust, so the coating can prevent the production of rust, so protecting the body is the biggest purpose of coating.

2. Aesthetic function: There are many shapes and angles of the body, and the use of coating can set off its three-dimensional sense and color beauty, so as to make the body more beautiful. 3. Value role:

Cars of the same level will also have different sense of value due to the different aesthetics of the painting. 4. Identification function: Cars of different purposes can be distinguished by their special colors, such as taxis, police cars, ambulances, etc.

Composition of coatings 1. Pigments: Pigments are extremely small particles, most of which are obtained by chemical refining reactions, which make the paint have hiding power. 2. Solvent:

Most of them are refined by **, which can dissolve the resin to liquefy and dilute it. 3. Additives: mainly used to prevent coating defects.

4. Resin: sometimes called solid paint agent or fixative, which makes the paint form a thin film, so that the pigment particles are suspended and have an adhesion function. The above-mentioned paint is what we often call paint.

From the "Cregency Automotive Refinish Paint Grading Basics Manual" If my answer is helpful to you, please give a thumbs up (comment in the lower left corner), look forward to your like, your efforts are very important to me, and your support is also the driving force for my progress. If you feel that my answer is still satisfactory, you can click on my avatar for one-on-one consultation. Finally, I wish you good health and a good mood!

Protective effect: metal, wood and other materials are often exposed to the atmosphere, and are gradually destroyed due to the erosion of moisture, salt spray, gases and microorganisms in the atmosphere. Coating on the surface of the object can isolate the external corrosive medium, prevent corrosion, and prolong the service life.

Decorative function: the coating is bright, beautiful, bright, and pleasing to the eye. It can change the original color of objects, coordinate colors, improve the environment, and beautify life. In national defense, the protective color of the paint is also used to hide.

Signs: All kinds of chemicals and dangerous goods used in the factory can be marked with the color of paint, and all kinds of pipelines, mechanical equipment and signal devices on the ship can be marked with various paints, which can make it easy for operators to identify and operate. On transport lines, different colors of paint are used to indicate warnings and red flags.

Binder (also known as film substance, adhesive): Binder is the most important component in the coating, its function is to connect the other components in the coating into a whole, adhere to the surface of the coated base layer, easy to dry and cure, and form a uniform, continuous and tough protective film.

Pigment: Pigment is a component of the coating film, because it cannot leave the main film-forming substance and form a coating film alone, so it is called a secondary film-forming substance. Its main role in the coating is to make the coating film have the required various colors and a certain hiding power, and it also has a certain impact on the performance of the coating film.

Solvent (or water): Solvent (or water) is also a secondary film-forming substance. The main function is to adjust the viscosity and solid content of the coating.

Pigment (color paste): Pigment is also a component of the coating film, and it is called a secondary film-forming substance because it cannot leave the main film-forming substance and constitutes the coating film alone. Its main role in the coating is to make the coating film have the required various colors and a certain hiding power, and it also has a certain impact on the performance of the coating film.

Filler: Filler, also known as physique pigment, is mainly used to make the coating film have a certain hiding power and color in the coloring pigment, and then supplement the required pigment components, and the filler plays"Filling"It is used to increase the thickness of the coating film, improve the durability and hardness of the coating film, and reduce the shrinkage of the coating film. In addition, fillers are used mainly to reduce the cost of coatings.

Additives: Additives are also known as auxiliary film-forming substances. The main function is to improve some properties of coatings and coating films. Although the general dosage is small, it has a significant impact on the performance of the coating.