TWI769701B - Building exterior wall waterproof particle coating structure and its application method - Google Patents

Abstract

A waterproof particle coating structure for building exterior walls and an application method thereof, comprising a primer layer, a particle structure layer and a surface coating structure layer sequentially applied to the wall surface, the main feature is that the particle structure layer contains an emulsion A granular paint mixture of water-based silicone-acrylic resin and a ceramic inorganic aggregate is applied to the wall surface and dried to form. Based on the total weight of the granular paint mixture, the proportion of the ceramic inorganic aggregate is between 55wt% and 65wt%. %, when the particle structure layer made according to the above formula is sprayed on the wall surface, it will produce a little protruding large and small particles, and produce a more beautiful visual effect.

Description

Building exterior wall waterproof particle coating structure and its application method

The invention is related to the waterproof particle coating of the exterior wall of the building, and has the characteristics of beautiful appearance, waterproof, heat insulation, shock resistance and anti-haze.

Please refer to the comparative example 1 of FIG. 1, which is a kind of exterior wall particle coating appearance of a building. Such exterior wall paint can imitate the texture of the stone wall, so it can be used as a coating to make the appearance of the building more textured, Increase the price. The operation method in Figure 1 is to apply latex paint first, and then use a roller to brush out the lines, but this method does not have the characteristics of shock resistance, water resistance and heat insulation.

The purpose of the present invention is to provide a building exterior wall with the characteristics of beauty, water resistance, heat insulation, shock resistance and anti-haze, which is a coating applied at least twice on the wall surface. A particle paint mixture is applied to a wall surface and dried to form a particle structure layer. The particle paint mixture includes an emulsion-type water-based silicone-acrylic resin and a ceramic inorganic aggregate. Based on the total weight of the particle paint mixture, the particle paint mixture is The proportion of ceramic inorganic aggregate is between 55wt% and 65wt%; then, a topcoat structure layer is formed by applying a topcoat mixture to the particle structure layer, the topcoat mixture comprising 27wt% to 33wt% of the polyacrylate dispersion body, 8 wt % to 12 wt % hollow ceramic particles, and 15 wt % to 25 wt % titanium dioxide, the hollow ceramic particles occupying 30 to 45 % of the total applied surface area in the dry topcoat structure layer. Wherein, a primer can also be applied between the wall surface and the particle structure layer, and the primer comprises 25wt% to 35wt% polyacrylate dispersion, 3wt% to 5wt% polypropylene glycol, 2wt% to 3wt% cellulose, 0.5 to 1.5 wt% of preservatives and the balance of water.

Preferably, the hollow ceramic particles are silicate ceramic particles.

Preferably, the primer comprises 30wt% polyacrylate dispersion, 4wt% polypropylene glycol, 2.5wt% cellulose, 1wt% preservative and balance water.

Preferably, the topcoat mixture contains 30wt% of the polyacrylate dispersion, 10wt% of the hollow ceramic particles, 20wt% of the titanium dioxide, and 40wt% of other additives, which are water, dispersants or adhesives.

The present invention also provides a method for applying a waterproof particle coating for building exterior walls, which comprises the following steps: evenly applying a primer mixture to the wall surface by rolling construction, and standing for at least 5 hours to form a primer layer; Apply a particle paint mixture to the primer layer by spraying with a spray gun, and let stand for at least 12 hours to form a topcoat structure layer; and apply the topcoat mixture to the topcoat structure layer by hand brushing or spray gun spraying, and let stand A topcoat structure layer is formed for at least 12 hours, wherein the hollow ceramic particles account for 30% to 45% of the total applied surface area in the dry topcoat structure layer.

In order to clearly illustrate the specific embodiment, structure and effect of the present invention, the following description is given in conjunction with the drawings. A numerical value defined by the term "about" in the following description should be understood as a range close to the numerical value, for example, the range It is the range formed by the interval of plus or minus 1 (%) of the numerical value, rather than the numerical value itself, so as to conform to the common understanding of those skilled in the art.

The invention provides a waterproof particle coating structure for building exterior walls, which at least comprises a particle structure layer and a surface coating structure layer. The particle structure layer is formed by applying the particle paint mixture to a wall surface and then drying it. The granular paint mixture comprises an emulsion type water-based silicone-acrylic synthetic resin and a ceramic inorganic aggregate. Based on the total weight of the granular paint mixture, the proportion of the ceramic inorganic aggregate is between 55 wt % and 65 wt %. Therefore, the particle structure layer has a waterproof effect. Among them, the function of silicone-acrylic synthetic resin is to glue, which can fill the natural cracks or uneven surfaces of general cement walls, and increase the adhesion of the topcoat structural layer. The ceramic inorganic aggregate is used to form particles and increase the adhesion degree combined with the topcoat structure layer, and the material cost is low.

The topcoat structure layer has the characteristics of anti-haze, heat insulation and water resistance. The topcoat structure layer is formed by applying the topcoat mixture and covering the particle structure layer, and then drying. The topcoat mixture contains 27wt% to 33wt% of polyacrylic acid Ester dispersion, 8 to 12 wt % of hollow ceramic particles, and 15 to 25 wt % of titanium dioxide, and the balance of other additives, which are water, dispersants or adhesives. The hollow ceramic particles account for 30 to 45% of the total applied surface area in the dried topcoat structure layer, wherein the hollow ceramic particles are nano-scale silicate ceramic particles.

Among them, the polyacrylate dispersion is used as the polymerization medium, the titanium dioxide has the effect of physical sun protection, and the hollow ceramic particles have the effect of heat insulation and waterproof. In addition, since the particle structure layer is a water-based ceramic layer containing ceramic inorganic aggregates, and the topcoat mixture forming the topcoat structure layer is also a water-based latex paint, it is formed due to evaporation of water after coating, which can form better structural strength. Next, the hollow ceramic topcoat structure layer has a good thermal insulation effect. Even if the heat is conducted to the intermediate layer, there are inorganic aggregates to insulate the heat transfer. Therefore, the thermal insulation effect applied to the exterior wall of the building is good.

In order to increase the adhesion of the paint, a primer layer is also included between the wall surface and the particle structure layer. The primer layer is formed by first applying a primer mixture to the wall surface and drying, which can penetrate the wall material. And it is connected with the paint frame, so that the next layer of paint can be easily attached to the wall. The primer mixture comprises 25 wt% to 35 wt % of polyacrylate dispersion, 3 wt % to 5 wt % polypropylene glycol, 2 wt % to 3 wt % cellulose, 0.5 to 1.5 wt % preservative and the balance of water, wherein poly Acrylate dispersion is a dispersion of a copolymer of ethyl acrylate and methyl methacrylate in water, which can be used as an emulsifier and is an opaque white viscous liquid.

After the three layers of coatings are formed, a film can be formed, which is ductile, so it has the characteristics of shock resistance and crack resistance.

In order to better understand the above content, the following specific embodiments are provided to illustrate the content of the present invention.

Table 1 Content of each component in waterproof particle coating raw material Example 1 primer mix Polyacrylate dispersion 30wt% polypropylene glycol 4wt% cellulose 2.5wt% preservative 1wt% water 62.5wt% Granular paint mix Emulsion type water-based silicone acrylic resin 40wt% Ceramic inorganic aggregate 60wt% topcoat mix Polyacrylate dispersion 30wt% hollow ceramic particles 10wt% Titanium dioxide 20wt% Water, dispersion or adhesive. 40wt%

Please refer to FIG. 2 , the present invention also includes a method for applying the waterproof particle coating of building exterior walls, which comprises the following steps:

Step S1: the above-mentioned primer mixture is evenly spread and applied to the wall surface by rolling construction, and a primer layer is formed by standing for at least 5 hours;

Step S2: apply the above-mentioned particle paint mixture to the primer layer by spraying with a spray gun, and leave it to stand for at least 12 hours to form a one-side coating structure layer;

Step S3: Apply the above-mentioned topcoat mixture to the topcoat structure layer by hand brushing or spray gun spraying, and let stand for at least 12 hours to form a topcoat structure layer.

Compared with the appearance of Comparative Example 1, Example 1 produced a lower degree of particle aggregation, which was different from the existing paint.

Please refer to Table 2 below, which is the coating of the particle paint mixture, and the following tests are carried out. Pilot projects experiment method test results Impact resistance (500g steel ball, 300mm) CNS10757 No cracking, peeling phenomenon Buckling resistance (∮2mm) No cracking, peeling phenomenon Boiling water resistance (300min) No abnormality Washing resistance (large 10000) No significant cracks and wear Salt water resistance (25%NaCl, 240h at room temperature) No abnormality Water resistance (after 18h at 23℃) No abnormality Alkali resistance (saturated calcium hydroxide, 168h at 20℃) CNS8082 No abnormality Acid resistance (25%H ₂ S0 ₄ , room temperature for 240h) CNS10757 No abnormality Water permeability (cm) CNS8082 0 Resistance to the repeated effects of heat and cold The surface of the sample has no peeling, cracking, swelling, and no significant discoloration and gloss loss Adhesion strength (kgf/cm ² ) Water immersion in standard state CNS8082 34.8 19.3 Tensile strength (kgf/cm ² ) CNS10757 254 Elongation(%) 1169 Windability CNS8082 No cracking or peeling Water vapor transmission rate (g/m ² , h) (40℃, 90%RH) CNS10757 0.73 Density (g/cm ³ ) CNS9725 1.9 Thermal conductivity (W/mK) CNS7774 0.0378 Fire resistance class test CNS6532 Level 1 flame test CNS7614 Fire source heating time (sec) 10 Afterflame time (sec 0 Embers Time(sec) 0 Carbonization length (cm) 0

Therefore, the building exterior wall of the present invention can be applied as a three-layer coating to achieve waterproof, thermal insulation, shock resistance and anti-haze resistance, and can have a better selling price.

S1~S3: Steps

The upper and lower side photos of FIG. 1 are respectively the appearances of the paints of Comparative Example 1 and Example 1 applied to the wall surface.

FIG. 2 is a flow chart of the method of operation of the present invention.

none

S1~S3: Steps

Claims (8)

A waterproof particle coating structure for building exterior walls, comprising: a particle structure layer formed by applying a particle paint mixture to a wall surface, the particle paint mixture comprising an emulsion type water-based silicone acrylic resin and a ceramic inorganic aggregate , based on the total weight of the particle paint mixture, the proportion of the ceramic inorganic aggregate is between 55wt% and 65wt%; a surface coating structure layer is formed by applying a surface paint mixture to the particle structure layer, and the topcoat The mixture comprises 27wt% to 33wt% polyacrylate dispersion, 8wt% to 12wt% hollow ceramic particles and 15wt% to 25wt% titanium dioxide, the topcoat mixture forms the topcoat structure layer after application to dry, and after drying The hollow ceramic particles in the topcoat structure layer account for 30 to 45% of the total surface area; wherein, a primer is included between the wall surface and the particle structure layer, and the primer contains 25wt% to 35wt% of polyacrylate dispersion, 3wt% to 5wt% polypropylene glycol, 2wt% to 3wt% cellulose, 0.5 to 1.5wt% preservative and balance water. The building exterior wall waterproof particle coating structure as claimed in claim 1, wherein the primer comprises 30wt% polyacrylate dispersion, 4wt% polypropylene glycol, 2.5wt% cellulose, 1wt% preservative and the rest amount of water. The building exterior wall waterproof particle coating structure as claimed in claim 1, wherein the topcoat mixture comprises 30wt% of the polyacrylate dispersion, 10wt% of the hollow ceramic particles, 20wt% of the titanium dioxide, and 40wt% of other additives, the Other additives are water, dispersants or adhesives. The building exterior wall waterproof particle coating structure as claimed in claim 1, wherein the hollow ceramic particles are silicate ceramic particles. A method for applying a waterproof particle coating for building exterior walls, comprising the following steps: A primer mixture is applied to the wall surface and allowed to stand for at least 5 hours to form a primer layer, the primer mixture comprising 25wt% to 35wt% polyacrylate dispersion, 3wt% to 5wt% polypropylene glycol, 2wt% to 3 wt % of cellulose, 0.5 to 1.5 wt % of preservatives and the balance of water; applying a particulate paint mixture to the primer layer and standing for at least 12 hours to form a topcoat structure layer, the particulate paint mixture comprising an emulsion type water-based silicone acrylic resin and a ceramic inorganic aggregate, based on the total weight of the particulate paint mixture, the proportion of the ceramic inorganic aggregate is between 55wt% and 65wt%; and the topcoat mixture is applied to The topcoat structure layer is left to stand for at least 12 hours to form a topcoat structure layer, and the topcoat mixture comprises 27wt% to 33wt% of polyacrylate dispersion, 8wt% to 12wt% of hollow ceramic particles and 15wt% to 25wt% of Titanium dioxide, the hollow ceramic particles accounted for 30% to 45% of the total surface area applied in the dry topcoat structure. The application method of claim 5, wherein the primer mixture is applied evenly by roller application, the particle paint mixture is sprayed with a spray gun, and the topcoat mixture is sprayed with a hand brush or a spray gun. The application method of claim 5, wherein the topcoat mixture comprises 30wt% of the polyacrylate dispersion, 10wt% of the hollow ceramic particles, 20wt% of the titanium dioxide, and 40wt% of other additives. The application method according to claim 5, wherein based on the total weight of the particulate paint mixture, the proportion of the ceramic inorganic aggregate is 60 wt%.

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