In today's modern society, the external walls of buildings are used to install insulation boards to heat the houses. However, after painting the exterior wall paint for a period of time, due to the thermal expansion and contraction movement of the insulation board, the external wall coatings are applied. There will be cracks on the wall. However, modern new paints have changed their original characteristics. The appearance of crack resistant paints on exterior walls has caused more and more villas to use exterior paints because only external paints have various bright colors. This is other materials. Unmatched. Well, now on the market which have exterior house paint, what is exterior house paint. Let's take a look together.
What is a building exterior paint
The bottom layer of the external wall of the building requires sufficient curing period. The surface of the new water mortar concrete must be properly maintained for a period of time to allow it to “spike alkali†and be fully dried. The surface of the bottom layer should be dry, solid, and firm, and there should be no defects such as sanding, cracks, and looseness.
1, use:
It is used to remove various oils, greases, rust-proof oils, greases, polishing pastes, polishing pastes and other oils on the surface of metal workpieces and equipment. It is especially suitable for stretching oils and pulls on the surface of parts after stretching or drawing. The removal of oil is completed in one step after oil degreasing, which has the characteristics of thorough degreasing, economical efficiency, etc. Finally, the product surface is clean and is suitable for metal and its non-metals (such as plastics, rubber, ceramics, etc.).
2, features:
Neutral, no harm to the skin, workpiece, equipment, has a low use of the concentration, the speed of oil removal, low cost, high efficiency, completely remove the stainless steel surface dirt, and ultimately make the product clean and clean. The higher the temperature is, the stronger the cleaning ability is, and it is especially suitable for small parts such as metal tableware and cooking utensils.
3, usage:
The cleaning solution is formulated as a 5 to 10% (by weight) aqueous solution (the higher the concentration is, the better the degreasing effect is), and is used after being heated to 60°C to 90°C at room temperature (the higher the temperature is, the better the degreasing effect is); Soak the to-be-treated parts in the above-mentioned cleaning agent to scrub or scrub the surface of the parts, or use a roller to clean and wash for 10-20 minutes, or a cleaning machine sprays and cleans the to-be-processed parts for 3 minutes-5 minutes, or in the ultrasonic cleaning equipment. The above-mentioned good cleaning agent is heated to 60°C~95°C, and the ultrasonic cleaning of the equipment is started for 3 to 15 minutes until the oil is clean and the clean water is rinsed. ,
Coating quality control
First, strict quality control of paint products
Understand the design intent and other design documents, clarify the use of features, and give priority to the use of quality certified products or green products. To prevent the use of counterfeit and inferior products, to inspect the incoming materials to see if their varieties and colors meet the requirements of design and construction, and to have product performance test reports and product qualification certificates. They shall be responsible for sorting, marking, and responsible persons for incoming materials, and establish a material entry acceptance system. Effectively make good materials quality.
Second, do a good job of grassroots construction quality
The key to the quality of construction at the grass-roots level lies in the strength, flatness and cleanliness of the grass-roots level. It can be seen that the moisture content of the grass-roots is an important indicator of the strength of the grass-roots, and different types of paint have different requirements for the moisture content of the grass-roots. Due to the poor air permeability of the coating of the solvent-based paint and hydrophobicity, it is easy to peel off if it is applied on the wet base layer. When applying a solvent-based paint, the moisture content of the base layer must not exceed 8%, and the moisture content of the base layer when brushing the water-based paint should not exceed 10%. Therefore, the control requirement of the base layer moisture content is to ensure the adhesion of the paint and the grass-roots layer and the phenomenon of peeling, hollowing, and cracking of the base layer. The intensity of the grass-roots level should not be neglected due to the progress of the construction period.
Secondly, the smoothness of the surface to be coated is poor. If the surface is rough or the surface roughness is different, spray, roller, or brush coating may also cause unevenness in the color of the exterior wall due to uneven absorption of the paint. A “flower face†should be formed. In addition, the grass-roots surface is uneven, resulting in uneven thickness and unevenness in the scraping of putty. It is also prone to local cracking and peeling. Therefore, the surface of the grass-roots level should be smooth, firm and solid, and it should not use defects such as sanding, cracks, and looseness.
In addition, grassroots pollution such as floating ash, soil, release agent, oil and other attachments, but also due to poor adhesion of the coating and the grass roots caused by the appearance of peeling, peeling, discoloration and other phenomena, which must be guaranteed The grass surface is clean.
Third, correctly grasp the temperature and humidity, select the appropriate environment for construction
All kinds of paints need to form a continuous film under certain temperature conditions, so it has a higher requirement for the construction environment. The appropriate temperature is conducive to the drying and filming of the paint. If the ambient temperature is too low or too high during construction, it will Reducing the technical indicators of the paint will cause poor film formation of the paint, so that it can not be uniform surface to produce cracks in the coating film, pulverization, shedding of water. Seriously affect the appearance of the building and the life of the finish. Therefore, the minimum allowable construction temperature and humidity should be strictly controlled. The best construction environment for the coating project should be chosen between 5-35°C. And good ventilation can not only accelerate the process of conjunctiva, but also benefit the health of operators.
With the development of new products, the types of coatings are also increasing. In particular, the technical standards and functions of new products should be properly constructed according to the requirements of the operating instructions. It is impermissible to act on the basis of experience. It should also be emphasized that the film formation of the paint is not completed in an instant and there is a process in between. Therefore, it is required that not only the minimum construction temperature requirements be met during construction, but also the temperature requirements should be met within a certain period of time after construction. If an abnormal situation occurs due to climate change or other reasons, appropriate protective measures should be taken. Guarantee the quality of the paint.
Fourth, strictly regulate the construction operating procedures. Guarantee the quality of appearance coatings
1. The construction personnel must prepare for the pre-construction work: Select the paint type and color according to the design and construction requirements. In order to avoid chromatic aberration, it is necessary to prepare enough materials and preparations at one time according to the requirements of use, and stir them evenly to ensure the consistent and consistent technical indicators.
2, due to alkali closed primer only:
a, closed the basic role of the external wall.
b. Improve the adhesion between the surface coating and the wall.
c. Strengthen the hiding power of the surface coating to prevent the surface coating from blooming.
d, saving face paint. Therefore, before the coating is applied, the outer wall must be subjected to a reasonable curing period and then a brush or roller is used for the sealing primer treatment.
The joints of the paint must remain in the compartments and at the corners of the yin and yang. It cannot be arbitrarily left to affect the appearance, and the protection of the finished product should be taken care of to prevent secondary pollution and man-made collision, scratching, scraping and rubbing. In the summer when the temperature is high and the humidity is low, the wall surface should be wetted with clean water, and the water can be applied after the water is basically dried. Otherwise, the coating film will not be easily peeled and cracked. In rainy days, it is unfavorable for construction because the anti-coating film is not rained before it is formed. This is particularly noticeable in construction.
Fifth, control the appropriate consistency
Consistency, excessive water will make the coating difficult to film, reduce coating gloss, hiding power and durability. therefore. Must be in the paint must be used before, must be fully mixed, and according to the requirements of the instructions for the organization of the construction, make the end of the work should not be mixed with water or color, and used up within the specified time, otherwise it will reduce its technical indicators affect its application quality.
What are the exterior wall paints?
1. Nano Multifunctional Exterior Wall Coating
Nanometer multifunctional exterior wall coating is made of imported emulsions and auxiliaries, combined with new nano-materials. It is a combination of nano multifunctional and exterior wall decoration. It is stain-resistant, washable, and high in color retention. High-grade environmental protection exterior wall paint widely used in villa buildings. Its characteristics are represented by nano-materials modification, effective shielding of ultraviolet rays, excellent weatherability, color retention, bright and durable coating; excellent water and alkali resistance, scrub resistance; strong hiding power, easy construction, and excellent resistance Algae mildew ability; 5, high anti-fouling, self-cleaning ability, can effectively cover the base of micro cracks.
2, external wall scraping type elastic texture coating
The external wall scraping type elastic texture coating consists of finely-graded fillers, pure acrylic acid binders and other additives. Specially designed viscosity structure, good flexibility, anti-collision and impact, the coating has excellent weather resistance, water permeability, can effectively bridge and cover the small cracks in the wall. Applicable to brick surface, cement mortar surface, gravel surface, plywood, rust-proof Steel Plate and other base surface, construction tolerance is wide. Its characteristics are: excellent adhesion and perfect hiding power; excellent outdoor weatherability, long-lasting color retention; good flexibility, impact resistance and impact; hydrophobic breathable, moisture-proof sound-absorbing;
3, mineral paint
In foreign countries, mineral paints have long been used to replace the outer wall tiles. This mineral paint has the advantages of resistance to acid rain, brushing, and resistance to air pollution. At present, domestic and building materials have been introduced and used in advanced applications. Villa home.
Editor's summary: The information on what constitutes exterior wall coatings and exterior wall coatings for buildings was introduced here. I hope this article will be helpful to everyone. If you still have something you don't understand, you can leave a message to Xiaobian at the bottom. We will answer your questions as soon as possible.
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