Is real stone paint the same as latex paint?

The construction method and outline of real stone paint, and a comprehensive understanding of real stone paint starts here!

Before you know the construction method of real stone paint, you must know its formula and construction steps, such as:

Real stone paint formula

First, natural stone paint

Pure propiolic acid 30 natural colored stone sand 65 thickener 3 plasticizer 1 other additives 1

First add additives, such as emulsion, thickener, plasticizer, etc. And stir evenly, then slowly adding natural colored sand, stirring evenly, and packaging.

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Second, alkali-resistant sealing primer

Pure propiolic acid 60 water 35, anti-mildew, preservative and other additives.

First add emulsion, additives, etc. And stir evenly, and then add water and stir evenly to package.

Third, finish varnish.

Component a

Polyurethane resin 60% coating, ink, resin, adhesive, formula

Butyl acetate 18%

Xylene 20%

Anti-ultraviolet agent 1%

Other auxiliaries 1%

Uniformly mixing and stirring, and packaging.

B component

HDI curing agent (75%)66% ultraviolet, radiation, water-based, additives, pigments.

Butyl acetate 34%

Uniformly mixing and stirring, and packaging. (Note: The flour oil should be mixed and prepared according to the ratio of A: B = 4: 1, and it can only be used after being evenly stirred. The service life can't exceed 8 hours, and you can take it with you. )

work progress

/kloc-polishing after 0/2 to 24 hours

Spray primer twice-spray real stone paint for 2-3mm- spray top oil twice.

Architectural technical index

Ultraviolet, radiation, water-based, additives, pigments.

⑴. Spray base oil: choose a pot spray gun, the pressure is 4-7Kg/ cm2, the construction temperature is not lower than 10℃, spray twice, the interval is 2 hours, the thickness is about 30 microns, and dry at room temperature 12 hours.

⑵. Spray real stone paint: use a real stone paint spray gun, with the air pressure controlled at 4-7kg/cm2, the construction temperature above 10℃ and the thickness of about 2-3 mm.. If two or three layers are needed, it can be polished after drying for 24 hours.

⑶. Polishing: Use 400-600 mesh sandpaper to gently smooth the raised sand grains on the surface of real stone paint. Be careful not to use too much force, otherwise it will damage the paint film and cause the bottom to loosen. In severe cases, it will cause poor adhesion and the real stone paint will fall off.

⑷. Top oil spraying: Use a spray gun with a pressure of 4-7kg/cm2, the construction temperature is not lower than 10℃, spray twice with an interval of 2 hours, and the thickness is about 30μ m, and it takes 7 days to completely dry.

Bases and requirements

Suitable for concrete or cement interior and exterior walls and brick walls, as well as asbestos cement boards, wooden boards, gypsum boards, polyurethane foam boards and other substrates. The surface base of the construction base material should be smooth, clean and strong, and the new wall should work hard for one month before construction. To renovate the old wall, first level the base and remove impurities such as looseness, surface peeling, dust and grease before construction.

Construction method

1, real stone paint should be smooth, firm and crack-free.

2, first with alkali-resistant sealing primer or wall treatment agent back cover again, after drying, with a special spray gun besmear brushs real stone paint, spraying once or twice (or scraping), repainting interval of more than 2 hours.

After 3.48 hours, water-based primer and topcoat were applied again.

4. Primer and topcoat must be applied to ensure the construction quality and durability.

5. For the complex base, in order to ensure the best construction effect, a comprehensive construction scheme of real stone paint is provided.

The spraying process of real stone paint mainly includes the following aspects:

Roman cylinder spraying

Because it is cylindrical, it is sprayed in an "M" shape with an interval of about 40cm. The spray gun should be sprayed vertically on the cylinder, from top to bottom, and then turned to the other side at a turning angle of about 60 degrees.

Square column spray

Square columns are angular and easily blurred due to uneven spraying. For the convenience of spraying, spray the corners at a distance of about 50cm, and spray at a long distance, and the fog will spread widely and evenly. If the distance is too close and the spray is thick and uneven, the angular lines will not appear and the overall aesthetic feeling of the original building will be lost.

Vertical spraying

The circular spraying method is adopted, with a distance of 30cm-40cm and a radius of about 15cm, and the spray gun is shaken up and down from time to time, so the spraying speed is fast, uniform and easy to control. If the main overlapping spraying method is adopted row by row, the speed is slow, and it is difficult to control the upper and lower seams evenly, which will affect the appearance and cause coating defects.

Masonry paint

1. First, design the size of the brick as required, then make a brick model with a wooden frame on the wall that has been primed, spray it, and remove the wooden frame before the surface of the real stone paint dries thoroughly.

2. Design the size of the brick as required, and then paste adhesive tape or thread on the wall that has been primed to make a model of the brick, and immediately remove the adhesive tape after spraying. Remember to be careful when uncovering the tape so as not to affect the cutting angle of the coating. Tip: Pull up as far as possible, not forward.

Cylindrical spray

Modern buildings are decorated with cylindrical gourds as railings, and most of them require spraying real stone paint. Because of their exquisiteness and decoration, their spraying process is also more detailed. The gourd column decorated with railings is too close in some places to be sprayed on the front, so the general conventional spraying method can not achieve the ideal effect. When spraying, choose a small nozzle with a distance of about 40cm, spray real stone paint quickly, and spray from top to bottom, but not from the front. By shaking the spray gun, spray real stone paint around as much as possible, and then brush it flat with a brush. Where it is not sprayed, you can also apply a layer with a brush. Spray it again with a spray gun, not too thin or too thick, just cover the brush marks. If it is thin, it will not play a very good protective role. If it is thick, it will cover the original aesthetic feeling of the lines, and some bad surface phenomena such as cracks may appear.

Real stone paint layer

Real stone paint coating is mainly composed of alkali-resistant primer, real stone paint intermediate layer and topcoat.

(1) Alkali-resistant primer According to different types of base, alkali-resistant primer can be divided into oily and waterborne. The function of primer is that after the solvent (or water) is volatilized, the polymer and filler in it will penetrate into the pores of the base, thus blocking the pores on the surface of the base, making the surface of the base have good waterproof performance, eliminating the flooding and frosting of the base caused by water migration, and increasing the adhesion between the main layer of real stone paint and the base to avoid peeling and looseness.

The middle layer of real stone paint consists of aggregate, binder (binder), various additives and solvents. Aggregate Aggregate includes colored aggregate and ordinary aggregate. Colored aggregate is made of natural stone through crushing, cleaning and screening. It has good weather resistance, acid and alkali resistance and color fastness, and is non-artificial sintered colored sand. Quartz sand with good whiteness and high silicon content is selected as ordinary aggregate. Because natural stone powder is dull in color, it is dull when used alone. A certain amount of white quartz sand and natural colored stone powder can be used to adjust the color depth. The color of the coating is layered, which can obtain a texture similar to that of natural stone and reduce the production cost. The particle size distribution of aggregate has a great influence on the workability of real stone paint and the performance of the paint. Aggregate particles are too coarse, which are easy to precipitate in the coating. When spraying, the landing sand increases, the coating dosage is large, the coating hiding power decreases, the coating appearance is rough, and it is easy to accumulate dust and be polluted. Aggregate particles are too fine, and the decorative effect is not good. Therefore, the combination of coarse and fine particles will not easily affect the decorative effect of the coating, but also make the coating compact. For example, the middle coating formula of real stone paint: pure acrylic emulsion (emulsion with strong adhesion and higher MFT) 30 natural colored stone sand 60 additives 10. Most of the market still does not use pure acrylic, and the cost is too high. Most of them use styrene-acrylic acid, and some high-end customers will use pure acrylic acid, and the amount of pure acrylic acid added in this formula is very large. Binder Binder is one of the key factors affecting the properties of real stone paint, which directly affects the hardness, bonding strength, water resistance and weather resistance of real stone paint film. Emulsion for real stone paint shall meet the following three requirements:

A, the emulsion is stable, the formed paint film is colorless and transparent, and it is not easy to yellow and powder under ultraviolet irradiation;

B, the hardness of the coating should be high to improve the stain resistance of the coating;

C, the water absorption expansion rate of the paint film should be small, forming a water-resistant and whitening-resistant paint film, that is, it has the ability to resist water and whitening.

(3) Topcoat material is mainly used to enhance the waterproof, stain resistance and ultraviolet radiation resistance of real stone paint coating, and it is also convenient for future cleaning. Topcoat includes oily two-component polyurethane transparent topcoat, oily two-component fluorocarbon transparent topcoat and water-based one-component silicone-acrylic topcoat.

Maintenance method of real stone paint

The first is the first plastering process. You should soak the wall one day in advance, then throw the pulp and nap it, and soak it again a week later to start the plastering process. Pay attention to evenly smear the gap and wait for a month.

Secondly, the thickness of real stone paint generally needs to be painted twice, and it should be painted in strict accordance with the prescribed thickness, otherwise it will lead to empty drums and cracks;

Thirdly, it should be carried out directly after the completion of wall building to ensure the drying time and strength of the wall;

The fourth is the process of maintenance. After the completion of the construction of the plaster layer of real stone paint, it is necessary to ensure that there is enough moisture to form a certain strength and it is not easy to produce cracks;

Fifth, within one month after the completion of the construction of the plaster layer of real stone paint, if there is obvious empty drum phenomenon, it is necessary to knock it off and start construction again. Be careful in the construction process. If there is a problem, it is necessary to knock off the wall painted with real stone and start construction again.

Sixth, attention should be paid to the proportion of mortar and careful construction.

Real stone paint is a new type of green and pollution-free paint with long service life, and it is the first choice for wall decoration now.

Matters needing attention in the construction of real stone paint

(1) In order to ensure the integrity of the coating, the primer and the main coating shall be the products of the same manufacturer;

(2) Basic treatment

1) The curing period of cement layer should be about 20 days, and it should be dry and smooth (2m drop < 2mm);

2) The water content is less than 10%, and the PH value is less than 10, so it has a certain bearing capacity;

3) Before construction, the surface mortar, floating ash and other attachments shall be removed;

4) The cavity should be removed, and the cement surface after plastering and repairing should be dealkalized;

(3) Flexible putty batch scraping

(1) Check whether the angle of Yin and Yang is incomplete and whether the lines meet the requirements.

(2) Scraping flexible putty in batches. First, mix and stir the putty evenly in proportion, then scrape the putty on the grassroots wall with a spatula, and then quickly scrape it flat with a spatula; If the putty dries too fast and cannot be leveled, it can be diluted appropriately to improve the workability. When scraping surface putty, a new batch knife must be used to avoid the defects on the blade from affecting the smooth scraping.

(3) After this batch of polishing putty is completely dried, the greasy layer can be polished, and it must be polished with 320 # ~ 400 # sandpaper. Too thick sandpaper will leave obvious sand marks and even destroy the greasy layer.

(4) Protection of finished products and lines Before priming, protect all the places that need protection.

1) Protection object: all other finished products connected with the construction surface, including doors, windows, door and window frames and glass; Outdoor downpipe; Other exterior wall decoration.

2) Protection purpose: avoid pollution, reduce cleaning workload, avoid cleaning damage and clean up residues.

3) protection methods

A doors and windows: use plastic film, baffle, plastic cloth, etc. , and stick it to the surface to be protected with double-sided tape.

B. Door and window frames: covered with masking tape and plastic film.

Outdoor downpipe: wrapped in plastic film.

E, other exterior wall decoration, such as marble, can be protected with plastic sheets.

(5) Brush the primer

Before the primer is used, stir it evenly before brushing it. The dipping degree of the roller brush should be appropriate, and the brushing must be uniform, and it is not allowed to miss the brush or sag. Where the internal angle is not easy to brush evenly, brush can be used to avoid hairiness caused by different absorption of real stone paint by the base material. The dosage of tinting primer is about 0.1.2m2/kg.

(6) Real stone paint construction

1) Primer must be thoroughly dried before spraying real stone paint. When spraying real stone paint, the muzzle must be perpendicular to the wall, not inclined at a large angle, so as to avoid blooming due to different sand particle arrangements; When spraying, the muzzle should be about 40cm away from the wall, and the distance should remain the same when spraying. Otherwise, the muzzle is too close, the sand grains are arranged closely, the color is dark, and the surrounding color is light. If it is too far away, the sand will float on the wall, and the adhesion is not enough, and the color will become lighter.

2) When spraying, spray evenly as far as possible, keep the gun moving at a constant speed, and don't pause on the wall; You can't directly face the wall when you start the spray gun, and you can't directly face the wall when you finish spraying the gun. You should move the gun and turn off the spray gun to avoid hair loss.

3) Each spraying surface should be completed at one time as far as possible, and the construction must be carried out from the top to the bottom of the building. Each spraying is bounded by the angle of yin and yang or the joint of downpipe. If there is no corner of yin and yang or downpipe in a large area, as many people as possible should finish it side by side at one time to avoid general face-to-face summer-planting. When the spraying of a cage cannot be completed at one time and needs to be stopped, try to stop at the horizontal decorative line to avoid horizontal summer-planting in the next spraying. The dosage of real stone paint is about 4-5kg/㎡.

(7) Finished product protection When the two colors of real stone paint cross, they must be protected to avoid mutual pollution and smudge. The specific method is to spray one color first, then use plastic film to protect it from contact with another color after drying, then spray another color, and then remove the protective film after spraying. If one color is just a decorative line or the area is very small, it can be scraped without protection, but care must be taken not to pollute another color during construction. After the construction of real stone paint is completed, we must pay attention to protect the finished product from damage and pollution, because real stone paint is difficult to repair. Once contaminated or damaged, patches will be formed when repaired. If you want to repair it, you can only spray it all over the wall, which is a great loss.

(8) The construction topcoat can only be started after the real stone paint is completely dried for 24 hours. Top coat must be spread evenly when roller coating, and it can't sag, so as to minimize summer-planting and avoid roller coating being too thick. In some places, the gloss is too high, resulting in hair loss due to different glossiness.

(9) Construction should be avoided under the environmental conditions that the air temperature is lower than 5℃ and the relative humidity is higher than 85%, so as to avoid frost caused by poor film formation of real stone paint; Nor can it be constructed in windy weather, so as to avoid that the real stone paint is difficult to spray on the wall, causing a lot of waste, and it is also difficult to spray evenly in windy weather, which may cause galling. In windy weather, the real stone paint may dry too fast and crack.

(10) Due to the thick coating and long drying time of real stone paint spraying construction, attention should be paid to the weather forecast. Make construction arrangements to avoid construction before rain and snow.

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