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    Home > Coatings News > Paints and Coatings Market > Paint knowledge | type of exterior wall paint price of exterior wall paint

    Paint knowledge | type of exterior wall paint price of exterior wall paint

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: first of all, let's see the classification of exterior wall coating There are many types of exterior wall coating It can be divided into strong acid and alkali resistant exterior wall coating, organic silicon self-cleaning and water-resistant exterior wall coating, toughened waterproof putty powder, pure acrylic elastic exterior wall coating, organic silicon self-cleaning elastic exterior wall coating, advanced acrylic exterior wall coating, fluorocarbon coating, tile special primer, tile finish, high weather resistant and hydrophobic surface paint, environmental protection exterior wall emulsion paint, acrylic oil finish, exterior wall oil Ba, metal paint , interior and exterior wall multi-functional coatings, etc., all of which have their own characteristics According to the decoration texture, it can also be divided into thin exterior wall coating, multi-layer pattern coating, colored sand coating and thick coating present Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: first to see the classification of exterior wall paint, there are many kinds of coating classification It can be divided into strong acid and alkali resistant exterior wall coating, organic silicon self-cleaning and water-resistant exterior wall coating, toughened waterproof putty powder, pure acrylic elastic exterior wall coating, organic silicon self-cleaning elastic exterior wall coating, advanced acrylic exterior wall coating, fluorocarbon coating, ceramic tile special primer, ceramic tile finish, high weather resistant and hydrophobic surface paint, environmental protection exterior wall emulsion paint , acrylic oil-based finish, exterior wall oil, metal paint, interior and exterior wall multi-functional coating, etc., all of which have their own characteristics According to the decoration texture, it can also be divided into thin exterior wall coating, multi-layer pattern coating, colored sand coating and thick coating Now Britain has invented a new type of building exterior wall coating, which can decompose harmful substances in the air In fact, a lot of paint in China will have some harm, only to see the degree of harm, now more popular is carpet art paint Generally, we should pay attention to the following points when purchasing exterior wall paint: good decoration, weather resistance, stain resistance, water resistance and mildew resistance These are important indicators to measure whether the wall paint is good or not Exterior wall coating construction method 1 Construction of thin-layer exterior wall coating thin-layer exterior wall coating is particularly suitable for the fine brushed wall, generally using one-time primer and two-time surface coating construction According to the project quality requirements, the number of surface coating can be increased appropriately Function of primer: seal the alkalinity of the wall, improve the adhesion between the surface coating and the wall, avoid absorbing a large amount of coating due to the wall is too dry, and ensure that the amount of absorption is equivalent, and increase the strength of the underlying material However, the function of primer is limited Although primer is used, the pH and moisture content of bottom layer must meet the requirements before construction Construction method: roller coating, brush coating, air spraying and airless spraying can be used Color selection: the fading of exterior wall coating is a common problem The slow fading of high-quality exterior wall paint does not mean that it will never fade, so it is generally recommended to choose a darker or darker color for the exterior wall paint, on the one hand, to make the building appear calm and generous, on the other hand, the darker color is generally prepared by inorganic pigments, and the weathering resistance of inorganic pigments is better than that of organic pigments, so the fading is also slower In addition, the same batch of paint shall be selected for the same building to ensure the same color The painting construction of the building shall be carried out from top to bottom, and each painting shall be bounded by the separation line, the joint of internal and external corners of the wall or the downpipe After opening the barrel, the coating shall be stirred evenly If the axial degree is too large, the construction performance can be adjusted by adding diluent (generally water is added to the emulsion paint) according to the instructions Pay attention to the requirements, especially the emulsion paint shall not be added with excessive water, otherwise the water will make the dry coating film difficult and reduce the gloss, durability and covering power of the coating The influence of temperature and humidity The minimum temperature for coating construction is generally specified in the coating specification Among them, latex paint has the highest requirement for construction temperature If it is constructed under a certain temperature, it will lead to poor film-forming There is another mistake in this area: some users think that the temperature of high-grade latex paint can be lower during construction In fact, it is the opposite Because the high-grade latex paint is usually made of emulsion with higher glass transition temperature, and the proportion of emulsion is higher, so even if a large amount of film builder is added, it needs a higher film forming temperature, that is, the construction temperature In addition, in the south of China, humidity often affects the quality of construction, especially for the solvent based exterior wall coating, it is not suitable for construction when the humidity is more than 85%, because the drying of the coating is very slow when the humidity is too high, which not only affects the adhesion of the coating to the wall, but also easily causes the wall to flower Therefore, when the air humidity is saturated, such as fog weather, coating construction cannot be carried out, but after heavy rain, construction can only be carried out after the wall is dry 2 The construction of multi-layer coating is also known as concave convex pattern coating or relief spray coating In the past, it was emphasized that when the multi-layer coating was constructed, the particles should be large and the concave convex feeling should be strong However, due to the current environmental pollution and other reasons, the small and uniform particles, slightly concave convex exterior wall coating, also known as orange peel exterior wall coating, are often popular now The bottom layer of the compound coating is not required to be very flat, so it is more reasonable to choose the compound coating for rough roughened wall For obvious defects such as missing edges and corners, polymer cement putty can be used to repair before coating It is necessary to brush the primer, because the primer can not only seal the alkalinity of the wall, adjust the permeability of the bottom layer, but also increase the adhesion of the main coating, so it can not be missed or not brushed Construction of main coating: the main coating is also called aggregate If it belongs to the reaction curing type, it shall be used as it is prepared, not stored for a long time, and the proportioning shall be in the charge of a specially assigned person to ensure the accuracy of the proportioning Mechanical spraying is generally used in the construction of main coating, so trial spraying shall be carried out before construction, and proper adjustment shall be made to the coating stiffness, spray gun type, nozzle diameter, nozzle air pressure, distance and angle between spray gun and wall The sample shall be painted first, and large area construction can be carried out only after passing the inspection The separation line of internal and external corners shall be covered The walking route of the spray gun can be up and down or left and right, and the uneven part can be re sprayed to ensure uniformity After the main coating is sprayed, it can be rolled with plastic roller or rubber roller dipped in kerosene and other solvents according to the requirements, and no obvious joint mark shall be found at the junction of each roller Orange peel exterior wall coating works also use such as thick touch-up latex paint construction methods to construction, similar to decorative mortar Choose different roller designs to create a variety of shapes The technique of this kind of coating in the construction is very important, such as how much material is dipped in each time, the size of the force, etc will affect the pattern shape, so the construction personnel should repeatedly test the roller, after mastering the essentials, can carry out large-area construction Overlay coating: 2 coating on the main surface of the main coating The surface coating can be made of solvent based exterior wall paint or synthetic resin emulsion exterior wall paint emulsion paint The construction of the covering coating is the same as that of the thin-layer exterior wall coating 3 The construction of color sand wall exterior wall coating the color sand wall exterior wall coating is also called exterior wall sandblasting This kind of coating used to be the decorative coating used for the exterior wall of most residential quarters, but because of its poor stain resistance, its application is limited in recent years On this basis, two new types of exterior wall decorative coatings pearl paint and real stone paint are developed The so-called pearl paint refers to the solvent type exterior wall paint or glossy emulsion paint on the sandblasted surface of the exterior wall, so that the surface of the coating will form a luster like pearl, hence the name "pearl paint" The real stone paint is made of high-grade sand blasting made of natural stone powder particles with different particle sizes, and then coated with solvent type varnish on the surface Polymer putty shall be used to repair defects such as missing edges, corners, holes, cracks and pockmarks on the bottom surface In order to reduce the water absorption of the bottom layer and enhance the adhesion, a layer of sealing primer can be applied on the bottom layer Due to the use of natural stone and poor covering power, the sealing primer should be prepared with similar color to ensure the decoration effect of the stone paint Spray gun operation When spraying, the pressure shall be controlled at 0.6-0.8mpa If the pressure is too low, the discharge is too slow; if the pressure is too high, the rebound is large In addition, the vertical distance between the spray bucket and the wall should be about 50cm When the spray gun is running, it must be perpendicular to the painted surface and move in a plane parallel to the painted surface When spraying, the intermediate coating is usually dense while the side is sparse, so about 1 / 3 of each line should be operated repeatedly The operation speed of the spray gun shall be kept uniform If it runs too fast and the coating film is relatively thin, the color will be uneven and the covering power will be poor If it runs too slowly, the local coating will be too thick or even sagging The real stone paint can be sprayed twice according to the need of decoration effect Before spraying construction, it shall be checked that the scaffold cannot be too close to the wall, or obvious joints will be formed at the scaffold, which will affect the coating effect Surface coating: the surface of pearl paint should be covered with medium and high-grade exterior wall coating The color can be white or color The color should not be too deep or too light, because if it is too deep, it will not be like pearl color, and if it is too light, it will fade faster The surface coating shall have a certain gloss The two-component reactive curing coating, such as epoxy acrylic varnish or polyurethane acrylic varnish, should be selected for the coating of real stone paint, so as to improve the stain resistance of the final coating, while the stain resistance of common thermoplastic acrylic varnish is poor Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
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