What is the role of primer sealing? The role of the sealing primer of the sealing primer

The function of sealing primer (1) Sealing the substrate, penetrating into the internal structure of the substrate, blocking the pores in the substrate, reducing the number of open pores in the substrate, increasing the number of closed pores, inhibiting the penetration of coating moisture, making the penetration uniform, and making the absorption of the substrate to the upper layer of the coating uniform. (2) The sealing primer can prevent moisture, resist alkali isolation, effectively isolate the alkali of the base layer, and prevent the exudation of alkali from damaging the coating. (3) Reinforcing the loose and weak substrate and strengthening the substrate.

Requirements for sealing primer: the sealing primer is directly attached to the substrate, which is attached to the middle coat and the top coat, which plays the role of connecting the upper and lower layers, a good coating system has no layer interface between the layers and the layer coating film, the coating construction requires effective mutual penetration between each process, the whole coating becomes a whole, the sealing primer is the first film attached to the substrate, so the quality requirements of the sealing primer are very high, there is good water resistance, alkali resistance, waterproof isolation saline-alkali exudation, good adhesion and interlayer adhesion. Types of sealing primers and selection of raw materials:

There are two kinds of sealing primers: solvent and water-based, solvent-based sealing bottom has strong penetration and strong sealing, and water-based has water-based emulsion and water-soluble. The sealing primer of water emulsion and silica sol combination has the sealing performance of solvent-based and emulsion. According to the type and condition of the substrate, the closed adhesive base material is selected, the loose porous substrate is selected with strong penetration and strong closure to strengthen the substrate, and the dense and smooth substrate is selected with strong adhesive performance, and good interlayer adhesion is required.

For different types of substrates, it is divided into two types: oily and water-based.

The function of the sealing primer is that after the solvent (or water) volatilizes, the polymers and pigments and fillers in it will penetrate into the pores of the base layer, thereby blocking the capillary pores on the surface of the base layer, so that the surface of the base layer has good waterproof performance, which can eliminate the pan alkali and blooming caused by water migration of the base layer, and also increase the adhesion between the main layer of the paint and the base layer, and avoid the phenomenon of peeling and loosening.

Summary. Hello, dear dear, the first component of the sealing primer is made of highly permeable epoxy resin liquid, and the second component is a special curing agent, which is suitable for the surface of concrete, wood, terrazzo, steel and other substrates as a sealing primer.

Kiss. Hello, it is a pleasure to answer for you, the answer to your question is: the function of the sealing primer is as follows:

1. Seal the substrate, infiltrate into the internal structure of the substrate, block the pores in the substrate, reduce the number of open pores in the substrate, increase the number of closed pores, inhibit the penetration of paint moisture, make the penetration uniform, and make the substrate absorb the mold failure letter of the upper layer of the coating uniformly.

Kiss the spine, hello, 2. Closed bottom cherry blossom can prevent moisture, anti-alkali isolation plum branches, can effectively isolate the alkali of the base layer, and prevent the exudation of alkali from damaging the coating. Reinforcing the loose and weak substrate and reinforcing the substrate.

Hello, dear, 3. The sealing primer is the first film attached to the base slip book, so the quality requirements of the sealing primer are very high, with good water resistance, alkali resistance, waterproof isolation and saline-alkali exudation, good adhesion and interlayer adhesion inspection and Li Xinhong.

Dear, hello, set up a sealing primer into a unique part of the first part of the highly permeable epoxy resin liquid, and the second component is a special curing agent, which is suitable for the surface of concrete, wood Zhihong lead, terrazzo, steel and other substrates as a sealing primer.

1. Anti-deformation and anti-cracking: Wood is a biological material, and the anisotropy of its structure leads to the anisotropy of its mechanics, so it is easy to produce the phenomenon of wet expansion and dry contraction. The sealing primer can isolate the inside of the wood from the outside air, prevent the wood from absorbing and dissipating moisture, and prevent the deformation and cracking of furniture.

2. Closed wood: After the sealing primer is cured, a dense coating is formed, which can fully seal the internal chemicals, moisture, grease and other substances in the wood, and prevent the paint film defects such as yellowing, whitening, and delamination in the later stage of the coating.

3. Hardened wood wool and wood thorns: When the furniture blank is polished, it is difficult for the sandpaper to effectively remove the flexible wood wool and wood thorns. After coating the sealing primer, the wood wool and wood thorns fully absorb the paint liquid, and after the complete curing, the wood wool and wood thorns change from flexible to hard and brittle, the sandpaper is lightly swept away, and the wood surface becomes smooth instantly from roughness.

4. Improve the coating quality: the sealing primer has excellent permeability, which can not only have a good effect on the wood, but also improve the coating quality, which is mainly manifested as follows.

1.The properties of the wood surface layer tend to be unified, providing a very good interface for the subsequent coating, which is convenient for the primer to fully wet the conduit, better spreading, leveling, and drying;

2.It is easy for Grace to wipe, and the three-dimensional sense is strong after coloring, and the color is more uniform;

3.After the sealing primer penetrates into the surface of the wood, it can "drive away" the air in the pores of the wood, prevent the subsequent coating from producing bubbles, and effectively improve the adhesion of the primer primer.

4.After the sealing primer fully penetrates into the surface of the wood, it combines with the wood to form a dense coating, and at the same time can provide a "support" effect on the dry coating and prevent the problem of paint film sagging.

The first component of the sealing primer is made of highly permeable epoxy resin liquid, and the second component is a special curing agent, which is suitable for the surface of concrete, wood, terrazzo, steel and other substrates as a sealing primer. Peculiarity.

1. Strong permeability, excellent sealing performance, which can improve the strength of the substrate.

3. The coating has excellent alkali resistance, acid resistance and water resistance, and has good matching properties with the surface layer.

4. It can be brushed and rolled, and the construction performance is excellent.

Hello, we are glad to answer for you, sealing primer is a special coating, which is mainly used to seal the pores and cracks on the surface of wood, and enhance the smoothness and durability of the wood surface. In general, a sealing primer is made from a mixture of various chemicals, the main components of which include polyurethane, epoxy, acrylic, etc. These components have good filling, adhesion and abrasion resistance, and can form a strong coating, which can effectively protect the surface of the spike wood from damage and oxidation.

In addition, sealing primers can also be used to control the water absorption and color of the wood surface, making it more uniform and aesthetically pleasing. Hope it can help you and have a happy life!

Wall decoration includes the interior wall and the exterior wall, we often only care about the construction of the interior wall, in fact, the exterior wall is also quite important, if the exterior wall closed primer is not well brushed, your exterior wall is likely to not be long after, there will be a large area of the phenomenon of wall skin falling off, I think this is what everyone does not want to see, then some people have doubts, since the paintingExterior wall closure primerThere will be falling off, why do you have to brush it, then you must not understand its function, let us introduce it to you in detail.

1. What is the function of exterior wall sealing primer?

1. The reinforcement base plays a role in reinforcing and protecting the relatively loose interior wall putty;

2. Reduce and uniform the water absorption of the base layer, and prevent the uneven topcoat paint film and color difference caused by the large and uneven water absorption of the interior wall putty;

3. Improve the adhesion of the coating on the putty, the primer generally has low viscosity, slightly lower surface tension, fine particles, good fluidity, easy to penetrate into the surface of the putty, and produce good adhesion;

4. Sealing effect, the primer can penetrate into the putty layer to fill the pores, which can effectively prevent the salt, alkali and other harmful substances in the putty from migrating to the surface of the paint film with the evaporation of water, affecting the surface effect of the topcoat and the overall performance of the paint film.

Second, the construction guidance of the exterior wall closure primer

1. Before the construction of the exterior wall primer, it is necessary to carry out a certain amount of maintenance on the exterior wall, and the wall should be leveled as much as possible, without too obvious pits and protrusions, and there are no hard injuries such as cracks.

2. Apply primer on the exterior wall, the role of primer is very important, it has a strong adhesive ability, and the alkaline sealing of the wall is closed, so that the exterior wall primer can be bonded very firmly when painting; It can also make the ash layer and putty bottom integrated, which greatly improves the waterproof performance of the exterior wall; Moreover, it can save more cracked socks material, so that the paint is more evenly applied, and the final effect will be very good.

3. During construction, it is best to use short wool rollers, and the brushing should be in place to avoid sagging and missing coating.

4. The topcoat is painted only after these are done, but before that, it is necessary to check whether the primer is missing, whether it is polluted, and the construction of the first topcoat is carried out after the completion of these, and the topcoat should be painted evenly and in the same direction.

3. Precautions for the purchase of exterior wall closure primer

The purchase of exterior wall paint should pay attention to the quality of wall paint in addition to consideration, and generally choose a reputable big brand. At the same time, check the detailed inspection sheet of the product, etc. Paint is a continuous film material that covers the surface of an object and can be firmly adhered to, and the environmental label is a "passport" in the paint market.

Try to choose big brand manufacturers. The basic performance of exterior wall paint is similar to that of interior wall chain latex paint, but the paint film is harder and the water resistance is stronger.

There are a lot of businesses selling exterior wall primers, and it is very important to be able to buy a good primer, so you should be careful when choosing. I believe that after reading the above introduction, Zhaoxiao should understand the role and importance of exterior wall sealing primer.