Paint knowledge | knowledge of interior wall coating

Core tips: first, what kinds of interior wall coatings are currently available? The first type is low-grade water-soluble coating, which is made by dissolving polyvinyl alcohol in water and adding pigments and other additives In order to improve its performance and reduce its cost, a variety of ways have been adopted, with many brands The main products are 106, 107803 interior wall coating The disadvantage of the coating is that it is not water resistant and alkali resistant, and the coating is easy to peel off after being damped It is a low-grade interior wall coating, suitable for general interior wall decoration This kind of coating has the advantages of low price, non-toxic, odorless and convenient construction The powder can't be wiped off dry As the film-forming substance is water-soluble, it can be wiped with a wet cloth Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: first, the current interior decoration interior wall coatings have those types The first type is low-grade water-soluble coating, which is made by dissolving polyvinyl alcohol in water and adding pigments and other additives In order to improve its performance and reduce its cost, a variety of ways have been adopted, with many brands The main products are 106, 107803 interior wall coating The disadvantage of the coating is that it is not water resistant and alkali resistant, and the coating is easy to peel off after being damped It is a low-grade interior wall coating, suitable for general interior wall decoration This kind of coating has the advantages of low price, non-toxic, odorless and convenient construction Dry wipe powder, because its film-forming material is water-soluble, so with a wet cloth after scrubbing always leave some traces, durability is not good, easy yellow color, but its price is cheap, construction is also very convenient, the current consumption is still the largest, about 50% of the market, mostly for low-end or temporary indoor wall decoration The second type is emulsion paint, which is made of acrylate, styrene acrylate copolymer, vinyl acetate polymer aqueous solution as film-forming substance and adding a variety of auxiliary components The film-forming substance is insoluble in water, and the film is coated Compared with the first type, the water resistance and weather resistance of the product are greatly improved, leaving no trace after wet scrubbing, and there are different decoration types such as flat light and high light Due to its less colors, the decoration effect is similar to 106 kinds In fact, these two kinds of coatings are not of the same grade at all They belong to the middle and high-grade coatings Although their prices are relatively expensive, they occupy a larger and larger market share due to their excellent performance and decorative effect Good latex coating layer has good water resistance, alkali resistance, scrub resistance, and the coating will never peel off after being damped Generally speaking (under the same conditions of pigment, volume and concentration), styrene acrylic emulsion paint has better water resistance, alkali resistance and scrub resistance than ethylene acrylic emulsion paint, and ethylene acrylic emulsion paint is better than polyvinyl acetate emulsion paint (commonly known as emulsion paint) The third type is a very popular multi-color coating The film-forming material of the coating is nitrocellulose, which is dispersed in the water phase in the form of oil in water A spray can form a variety of color patterns In recent years, another kind of porcelain like coating has appeared, which belongs to the fourth category Its decoration effect is delicate, bright and clean, elegant, and the price is not high However, the construction process is complicated, and the resistance to wet rubbing is poor Secondly, how to judge the quality of the emulsion paint after opening the cover is really environmentally friendly The latex paint should be waterborne, non-toxic and tasteless, so if the user smells, if it has pungent odor or industrial flavor, it is not an ideal choice After a period of time, the surface of the genuine latex paint will form a very thick elastic oxide film, which is not easy to crack, while the defective paint will only form a very thin film, which is fragile and has a pungent smell Mix the emulsion paint with a wooden stick, and pick it up with a wooden stick When the high-quality emulsion paint flows down, it will form a fan shape Touch with your fingers, the genuine latex paint should feel smooth and delicate The real emulsion paint has no pungent smell, while the low-grade water-soluble paint of fake emulsion paint may contain formaldehyde, so it has a strong pungent smell Secondly, a little paint can be brushed on the cement wall After the coating is dry, it can be scrubbed with a wet cloth The real latex paint has a strong scrubbing resistance, and one or two hundred times of scrubbing will not have a significant impact on the appearance of the coating, while the low-grade water-soluble paint only has a dozen times of scrubbing, which will cause the fading phenomenon of powder falling and exposed bottom When the emulsion paint is applied to the wall, the color of the genuine paint is as bright as new When purchasing, you should look at the ingredients The ingredients of the high-quality paint should be copolymer resin or pure acrylic resin Don't forget to look at the shelf life of the product 3、 Why latex paint is much better than solvent paint? Latex paint is water-based paint Its film performance is much better than solvent paint The organic solvent, which accounts for half of solvent paint, is replaced by water here Therefore, the toxicity of organic solvent is basically solved by latex paint Emulsion paint is made of some polymer aqueous solution In addition to water and different types of safe and harmless polymers or polymers, it also contains a small amount of emulsifier and a small amount of unpolymerized free monomers Free monomers are some volatile small molecular substances with different degrees of toxicity Now the concentration of free monomers of environmental protection paint is controlled below 0.1%, and the use of auxiliaries is under control 2% to 3% of them are in large quantity, and only 0.05% to 0.1% of them are in small quantity At present, the toxic concentration of free monomers and the amount of additives used in inferior latex paint exceed the standard by dozens or hundreds of times, which affects the health Now the commonly used lipang and Dulux paints have reached the specified environmental protection standards and are safe At present, there are a lot of latex paint brands in the market, and the imported and domestic products are on the same pace, with fierce competition The domestic brands with guaranteed quality and good reputation are Hongshi and Kelan; the imported brands are duluxi, Libang paint, Laiwei paint, etc The washability of these brands is generally no less than 300 times, some as high as 2000 times If the imported brand is a "green product", there is an international certification mark on the outer package, for example, Germany is a "Blue Angel" sign; the domestic product can only be called a "green product" if it has the word "product certified by China Environmental Labeling Product Certification Committee" 4、 Comparison between imported latex paint and domestic latex paint at present, the imported latex paint in the market belongs to high-grade and high-priced paint It is only slightly better than domestic latex paint in leveling, fineness, color matching and can opening state, other indicators are equal, but the price is 1-2 times higher than domestic latex paint There are some misunderstandings about the use of imported latex paint For example, one kilogram of latex paint can be brushed over 8 square meters, which is intended to tell people that the cost per square meter is not more expensive than that of domestic latex paint But one kilogram is impossible to brush such a large area The coating is too thin to guarantee other properties Generally 1 kg paint brush 5 square meters is not less Moreover, some imported latex paints are actually produced by domestic joint ventures and are labeled with the trademarks of foreign companies But the domestic latex paint also has many good quality, but the price is much lower than the imported paint, for the general family, it is more suitable The best choice for home decoration is interior wall emulsion paint 5、 How to choose latex paint according to different parts of the paint The function of emulsion paint is very important It should be selected according to different parts of the paint For example, the wall of bedroom and living room should have strong adhesion, fine texture, good differentiation resistance and air permeability; the emulsion paint of kitchen and bathroom should be waterproof, mildew proof and easy to wash The bedroom chooses the polyvinyl acetate type (commonly called latex paint), but the kitchen, toilet and balcony ceiling are easy to be affected with damp parts, should choose the paint that is more resistant to scrubbing, strong ethylene propylene or styrene propylene latex paint VI, what should be paid attention to in construction? Before the construction of emulsion paint, the wall must be treated properly, otherwise the emulsion paint will cause serious problems such as falling off, cracking, foaming and so on At present, many people still use 821 putty in construction In fact, 821 putty is very water-resistant When the wall contains water, 821 putty will absorb water and blister, which will cause large area blistering and falling off of latex paint And the better the performance of latex paint, the better the film-forming property, the more serious the problem Therefore, when using emulsion paint, first use the back cover to seal the wall, and then use water-resistant putty to avoid the above problems During the construction of emulsion paint, it should be stirred evenly, especially when using bright colored products If not stirred evenly, when the color paste in the paint is not stable or precipitated due to long-term storage, the construction will cause the decorative effect to be affected seriously In addition, whether and how much water can be added during latex paint construction must be strictly in accordance with the manufacturer's regulations Because some manufacturers in the design and development of latex paint, have fully considered the needs of users, designed a variety of formulas, some latex paint in the construction of water, water instead of breaking the various properties of the latex paint It should be noted that brush coating, roller coating and spray coating can be used in the construction Either of the above methods can achieve the expected effect, but the viscosity of the emulsion paint should be adjusted to make it easy to brush during the construction, and there is no obvious brush mark after brushing If the viscosity is too large, the brush mark is obvious, and the viscosity is too low, it is easy to cause slag flow and poor covering power After construction, tools shall be cleaned with water in time, otherwise, it will be difficult to clean the emulsion paint after drying due to its water resistance 7、 Can the exterior wall paint be applied to the interior wall? According to experts, it's no problem to paint the exterior wall with interior wall paint from the perspective of environmental protection, but it's not necessary to paint the exterior wall with interior wall paint According to the introduction, internal and external wall latex paint have their own special requirements External wall latex paint is used for painting on the building facade, so the most important index is anti ultraviolet radiation, to achieve long-term exposure without discoloration And the interior wall paint used for interior wall painting, UV resistance requirements are much lower than the exterior wall paint The interior wall latex paint has a high requirement for scrub resistance It is easy to stain the wall surface in home life and can be wiped with water at any time The external wall shall be water resistant and self-cleaning The paint film shall be hard and flat, and the dirt shall be washed away as soon as possible The elasticity of interior and exterior wall paint is very important Elasticity can prevent cracking caused by temperature and climate change Exterior wall paint can be used for interior wall painting because it also has water resistance, while interior wall paint does not have sun resistance, so it cannot be used for exterior wall painting, but experts suggest that it is better to use it for special purpose ■ interior and exterior wall paint have the same requirements for environmental protection People raised the question "whether exterior wall paint can be used to brush interior wall", mainly concerned about environmental protection, and worried about the low environmental protection index of exterior wall paint, which will cause indoor air pollution In fact, as long as it is latex paint, whether it is interior wall paint or exterior wall paint, there is no pollution 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,