7. What are the main functions and characteristics of exterior wall coatings?
The main function of exterior wall coatings is to decorate and protect the exterior walls of buildings, making the appearance of buildings neat and beautiful, thereby achieving the purpose of beautifying the urban environment. At the same time, it can protect the exterior walls of buildings and extend their service life. In order to achieve ideal decorative and protective effects, exterior wall coatings should have the following characteristics.
(1) Good decorative properties require that the exterior wall coatings have rich colors and excellent color retention, and can maintain the original decorative properties for a long time.
(2) Good weather resistance Exterior wall coatings are mainly used outdoors. Their coatings are exposed to the atmosphere and must withstand sunlight, rain, wind and sand, and changes in temperature. Under these external effects, the coatings are prone to cracking, powdering, peeling, discoloration, etc., causing the coatings to lose their original decorative and protective functions. Therefore, as exterior wall coatings, their coatings are required not to suffer the above-mentioned damage within the specified period of time, that is, they have good weather resistance.
(3) Good stain resistance Generally speaking, the environment is seriously polluted, and there are more dust and other suspended matter in the atmosphere, which are easy to stain the coating. As a result, the coating will lose its decorative effect and become unrecognizable, seriously affecting the appearance of the building. Therefore, it is required that the exterior wall decorative coating is not easily stained by these substances, or it is easy to remove the stain.
(4) Good water resistance The exterior wall paint surface is exposed to the atmosphere and is often washed by rain. Therefore, the exterior wall coating should have good water resistance. Some elastic exterior wall paints are required to have better waterproof performance. When fine cracks occur on the base wall, the coating film remains intact and has waterproof function.
8. What are the main functions and characteristics of interior wall paint?
The main function of interior wall paint is to decorate and protect the interior wall, making it beautiful and tidy. The color of interior wall paint is suitable for light and soft, creating a comfortable living environment. However, there are also people who choose dark and bright colors or choose interior wall paint with various textures in pursuit of fashion.
In order to obtain good decorative and protective effects, interior wall paint should have the following characteristics.
① Meet environmental protection requirements, especially VOC and free formaldehyde, heavy metal content must meet national standards.
② Rich colors, fine coating, good covering power.
③ Good water resistance and scrub resistance. Since indoor walls are often in direct contact with furniture, daily necessities, children, etc., they are easily stained by scratches, dust, and stains, and require easy cleaning.
④ Have a certain degree of air permeability. It can be constructed on a relatively humid substrate without the occurrence of coating bulging and other disadvantages.
⑤ Good construction performance, no brush marks, no sag. Since the indoor space is relatively small, the defects of the interior wall paint finish are easily exposed, which requires the paint to have a better appearance, small brush marks, and no sag.
9. What are the main functions and characteristics of floor paint?
The main function of floor paint is to decorate and protect the indoor floor, making the floor clean, beautiful and strong. Together with decorative materials such as wall paint to create an elegant indoor environment, in order to obtain good decorative and protective effects, floor paint should have the following characteristics.
(1) Strong bonding strength. Indoors are places where people live and work. They are in direct contact with floor coatings and suffer from high wear and tear. Therefore, floor coatings must have good bonding strength and should not peel or peel off.
(2) Good wear resistance. Since people walking and objects moving often cause friction with the ground, floor coatings must have good wear resistance.
(3) Strong impact resistance. In daily life, things often fall on the ground. Floor coatings must be able to withstand the impact of objects without damage and must have impact resistance.
(4) Good water resistance. Since the ground is often scrubbed with water and various cleaning liquids, it must have good water resistance.
(5) Good chemical resistance. Since the ground, especially the ground in industrial plants, often encounters chemicals such as acids, alkalis, and oils, it must have good chemical resistance.
(6) Comply with environmental protection requirements and do not pollute indoor air.
10. What are functional architectural coatings? What are their varieties?
Functional architectural coatings are also called special coatings. In addition to being used for decorative functions on the interior walls, exterior walls, and floors of buildings, they also have certain special functions, such as waterproofing, mildew resistance, fire resistance, thermal insulation, etc. These coatings are required to have a unique function in addition to the general properties and decorative effects of architectural coatings, and can play a certain expected functional role. Functional architectural coatings have expanded the application range of architectural coatings. Common functional architectural coatings include waterproof coatings, fireproof coatings, mildew-proof coatings, elastic coatings, thermal insulation coatings, and anti-corrosion coatings. In addition, there are anti-condensation coatings, insecticide coatings, anti-static coatings, radiation protection coatings, anti-graffiti and anti-sticking coatings, etc.
