KR101039306B1 - Painting composition for outer wall finishing - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a coating composition for exterior wall finishing, and in particular, including a room temperature curable organic liquid resin, glass beads, and calcium silicate hydrate or amorphous silica, such as building exterior walls, rooftops, water tanks, swimming pools, water purification tanks, and the like. It can prevent poor adhesion, contamination, and lifting when painting the outer wall, and it is possible to work on the vertical part, and at the same time, there is no peeling phenomenon of the outer wall due to temperature difference, and it has no physical properties such as adhesiveness, chemical resistance, weather resistance, heat resistance, sound insulation, and waterproof. It relates to a coating composition for finishing the outer wall that can maintain.

Outer Wall Finish, Room Temperature Curable Organic Liquid Resin, Glass Beads, Glass Powder, Glass Fiber, Calcium Silicate Hydrate, Amorphous Silica, Thixotropic

Description

Coating composition for exterior wall finishing {PAINTING COMPOSITION FOR OUTER WALL FINISHING}

The present invention relates to a coating composition for exterior wall finishing, and more particularly, to prevent adhesion defects, contamination, and lifting during exterior wall coating of water exterior walls, rooftops, water tanks, swimming pools, water purification tanks, and the like. In addition, at the same time there is no peeling phenomenon of the outer wall due to the temperature difference, and relates to a coating composition for finishing the outer wall that can maintain physical properties such as adhesion, chemical resistance, weather resistance, heat resistance, soundproofing, waterproof.

Building exterior walls, rooftops, water tanks, swimming pools, water purification tanks, etc., which are based on concrete surfaces, wood, stone, high boards, plaster boards, and slats, are exposed to various exterior paints to improve aesthetics and waterproof properties. Finished with

Water-based paints have been widely used as the most representative finishing materials. The water-based paint contains 50% or more of an acrylic synthetic resin as a main adhesive material, and uses various pigments, waterproofing agents, and the like in combination. The water-based paint has an advantage of easy concealment, workability, adhesion, etc., easy to install at the beginning of the application. However, in the case of the outer wall coated with the synthetic resin exposed to the atmosphere, the surface coating layers of the outer wall are separated from each other due to severe shrinkage and expansion between the paints due to the severe temperature difference between winter and summer. have. In addition, the moisture penetrates and stores the separated space, thereby causing problems such as decay of organic materials by moisture inherent in summer.

In addition, when painting exterior walls such as building exterior walls, rooftops, water tanks, swimming pools, water purification tanks, etc. based on concrete surfaces, wood, stone highboards, plasterboards, and slats, paint applied to the substrate flows down, resulting in poor adhesion, There is a problem that contamination, lifting phenomenon occurs, the work of the vertical portion is difficult.

Therefore, there is a need for a study on exterior wall finishing paints that can prevent the flow down while maintaining the basic physical properties when painting the exterior walls of buildings, roofs, water tanks, swimming pools, water purification tanks.

In order to solve the problems of the prior art as described above, the present invention provides a thixotropy to the paint when painting the exterior wall of the building exterior wall, rooftop, water tank, swimming pool, water purification tank, etc. It is an object of the present invention to provide a coating composition for exterior wall finishing that can prevent lifting.

Another object of the present invention is to provide a thixotropy to the paint when painting the outer wall to prevent the flow down, it is possible to work in the vertical area, the viscosity is given when the drag is applied and the viscosity is restored when the drag is removed has the property of increasing It is to provide a paint composition for finishing the outer wall brush is possible.

Still another object of the present invention is to provide a coating composition for finishing an outer wall, which does not have a peeling phenomenon due to a temperature difference and can maintain physical properties such as adhesion, chemical resistance, weather resistance, heat resistance, sound insulation, and waterproof.

In order to achieve the above object, the present invention in the coating composition for finishing the outer wall,

a) 100 parts by weight of a room temperature curable organic liquid resin;

b) 10 to 200 parts by weight of glass beads; And

c) 1 to 40 parts by weight of calcium silicate hydrate or amorphous silica

It provides a coating composition for finishing the outer wall comprising a.

Hereinafter, the present invention will be described in detail.

The inventors of the present invention while studying the coating that can prevent the flow down by giving thixotropy to the outer wall of the building exterior wall, rooftop, water tank, swimming pool, water purification tank, etc., the room temperature curing type organic liquid resin and glass beads As a result of the preparation of the coating composition by adding calcium silicate hydrate or amorphous silica to the resin mortar, the thixotropy is imparted to the coating to prevent it from flowing down, thereby preventing adhesion defects, contamination, and lifting. It was confirmed that the work of the site, and based on this, the present invention was completed.

The coating composition for exterior wall finishing of the present invention is prepared by stirring and mixing a room temperature-curable organic liquid resin, glass beads, and calcium silicate hydrate or amorphous silica.                     

The room temperature-curable organic liquid resin used in the present invention may be used as it is, epoxy, acrylic, urethane, alkyd, polyester, or polyvinyl chloride. The epoxy-based resin is preferably a solvent-free or solvent- diluting epoxy resin having a molecular weight in the range of 350 to 3,000 MW among diglycidyl and triglycidyl types. The acrylic resin is preferably an acrylic urethane, an aqueous acrylic hydrosol, an emulsion-free acrylic silane, an ultraviolet curable acrylic, or the like having a methacrylic acid derivative as a main component. The alkyd based resin is preferably an alkyd resin in the form of a coating modified with a polybasic acid and a polyhydric alcohol ester compound, and includes rosin, phenol, epoxy, and vinyl styrene monomer. ), Alkyd resins modified with isocyanate, silicon, or the like can also be used. The polyvinyl chloride system preferably uses a plastic sol liquid resin of PVC.

These resins act as a binder of the coating composition, impart acid and alkali resistance, add a curing agent if necessary to cure, and a curing accelerator may be used to control the curing rate. Of course, the selection of these curing agents and curing accelerators can be determined according to the type and amount of the resin.

Such a room temperature-curable organic liquid resin has a problem that the binder capacity is weak when the content is too low, the content of the glass powder is reduced when the content is too high, the strength and physical properties are generally poor.                     

The glass beads used in the present invention may use glass beads of spherical shape, elliptical shape, or the like, and may be used to select only a certain size from a variety of sizes distributed.

Preferably the particle size of the glass beads is preferably 200 mesh (mesh) to 3 mm. If the particle size is less than 200 mesh, the volume fillability may be lowered and the impact resistance may be lowered. If the particle size is larger than 3 mm, the dispersibility may be lowered or protruded more than necessary.

The glass beads are preferably included in an amount of 10 to 200 parts by weight, and more preferably 50 to 100 parts by weight, based on 100 parts by weight of the room temperature curable organic liquid resin. If the content is within the above range, both the adhesiveness and workability and the physical properties of the attachment portion are good.

In addition, the coating composition for finishing the outer wall of the present invention may include glass fibers as necessary. The glass fiber is present in the resin to increase the tensile force of the coating composition to be cured and serves to prevent cracking. Such glass fibers are preferably long glass fibers of an E glass composition, and fibers of an alkali resistance composition may be used.

The glass fiber may be a chopped fiber or a milled fiber prepared by crushing the glass fiber having a fiber diameter of 10 to 20 ㎛ to a uniform stand length, or pulverized to an average fiber length. In particular, the chopped fiber is preferably cut to a fiber length of about 2 to 12 mm, and the pulverized fiber is preferably an average fiber length of 100 to 300 ㎛. Particularly, pulverized fibers are preferable in consideration of tensile strength reinforcement and dispersibility of the resin, and chopped fibers and pulverized fibers may be mixed and used.

The glass fiber is preferably included 1 to 50 parts by weight based on 100 parts by weight of the room temperature curing type organic liquid resin. When the content of the glass fiber is within the above range, there is a particularly advantageous advantage such as tensile strength, durability and dispersion.

In addition, the coating composition of the present invention containing the above components may include glass powder (glass power) as necessary.

The glass powder may be mixed with the resin to increase the viscosity, and after curing, the impact resistance may be increased by filling the pores of the resin. In addition, the glass powder functions to strengthen the surface hardness and improve scratch resistance, abrasion resistance, and fouling resistance after the resin is cured with a rigid material having a hardness of 6 to 7.

The glass powder may be one of various particle shapes and particle sizes, and the particles of the glass powder are obtained by pulverizing general glass, and the glass composition is compatible with resins such as A, C, E, and alkali-resistant glass powder compositions. It will not be specifically limited if it is. Particularly, when the particle size of the glass powder is 10 μm to 1 mm, the particle size of the glass powder is better in terms of ease of operation and physical properties.

The glass powder is preferably contained in 10 to 400 parts by weight, more preferably 50 to 100 parts by weight based on 100 parts by weight of the room temperature-curable organic liquid resin. If the content is less than 10 parts by weight, the viscosity of the composition may be lowered and shrinkage expansion may increase after curing. If the content is more than 400 parts by weight, the viscosity may be increased too much, the resin content may be lowered and the strength may be lowered. There is a problem that it can be dropped after curing.

The calcium silicate hydrate or amorphous silica used in the present invention provides a thixotropy that prevents the coating composition from flowing down at the same time, while exhibiting strong adhesion and strength to the coating composition. In the case of repairing cracks in areas where the mother is porous (cement brick, etc.), in which the injected resin penetrates into the mother, causing the cracks to cavify and lead to poor adhesion, or through cracks. It prevents leakage and contamination on the back.

The calcium silicate hydrate may be Xonotlite (6CaO · 6SiO ₂ · H ₂ O) or Tobermorite (5CaO · 6SiO ₂ · 5H ₂ O) as a material produced by the reaction between calcium silicate (C ₃ S) and water. As the amorphous silica, conventional ones used in the art can be used.

The calcium silicate hydrate or amorphous silica is preferably added to and mixed with the glass beads prior to curing.

The calcium silicate hydrate or amorphous silica is preferably included in an amount of 1 to 40 parts by weight, more preferably 5 to 10 parts by weight, based on 100 parts by weight of the room temperature curable organic liquid resin. When the content is within the above range, it is possible to effectively give thixotropy to the coating composition, so that the work of the vertical part is possible, and when the drag is given, the viscosity decreases, and when the drag is removed, the viscosity is restored to increase the brush coating. There is an advantage.

In addition, the coating composition of the present invention may add various colors to the floor of the parking lot by adding a pigment, if necessary, in addition to additives such as fillers, diluents, dehumidifying agents, flame retardants, surfactants, or antioxidants. Can be.

The coating composition of the present invention comprising the above components can be coated on the outer wall of the building exterior wall, rooftop, water tank, swimming pool, water purification tank and the like to exhibit excellent durability, preferably to be coated with a thickness of 500 to 7,000 ㎛ It is good to apply | coat, More preferably, it is coating by thickness of 0.8-1.2 mm, Most preferably, it is coating by thickness of 1 mm.

The coating may use a conventional method used in the art, and specifically, brush coating, spray coating, roller coating and the like may be used, and in particular, it is preferable to paint using a brush painting or spray coating.

The coating composition of the present invention as described above can prevent the adhesion failure, contamination, lifting by preventing the flow down by giving thixotropy to the paint when painting the outer wall of the building exterior wall, rooftop, water tank, swimming pool, water purification tank, etc., vertical Not only the work of the site is possible, but the viscosity is given when drag is applied, and the viscosity is restored when the drag is removed, which has the advantage of increasing the brush painting. In addition, the coating composition does not have a peeling phenomenon of the outer wall due to the temperature difference, and has the advantages of having physical properties such as adhesion, chemical resistance, weather resistance, heat resistance, soundproofing, and waterproofing.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.

[Example]

Example 1

20 g of benzyl alcohol and Xonotlite (6CaO. 80 g of 6SiO ₂ H ₂ O) was added and uniformly mixed to prepare a coating composition.

Examples 2-9 and Comparative Examples 1-4

A coating composition was prepared in the same manner as in Example 1, except that Example 1 was used as a component and a composition ratio shown in Table 1 below. At this time, the unit of Table 1 is g.

division Example Comparative example One 2 3 4 5 6 7 8 9 One 2 3 4 Epoxy
Liquid resin 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 Glass beads 500 500 500 500 500 500 500 500 500 - 500 500 500 Fiberglass - 50 50 - 50 50 - 50 50 - - 50 50 Glass powder - - 500 - - 500 - - 500 - - - 500 XONOT
LITE 80 80 80 - - - - - - - - - - TOBERMO
RITE - - - 80 80 80 - - - - - - - Amorphous
Silica - - - - - - 80 80 80 - - - - Epoxy liquid resin: YD-128, manufactured by Kukdo Chemical
Glass beads: Glass beads with an average particle size of 1 mm (local production company)
Glass fiber: crushed glass fiber (MF300, Finance Industry Co., Ltd.) with an average fiber length of 300 µm
Glass powder: Glass powder with an average particle size of 200 mesh and a specific gravity of 2.54 (Finance Industry Co., Ltd.)
_{XONOTLITE: 6CaO · 6SiO 2 · H} 2 O
TOBERMORITE: 5CaO, 6SiO ₂ , 5H ₂ O

The physical properties of the coating compositions prepared in Examples 1 to 9 and Comparative Examples 1 to 4 were measured by the following methods, and the results are shown in Table 2 below. The average value was repeated 10 times with 5 points showing the most excellent physical property, 3 points showing the middle property, and 1 point showing the worst physical property.

A) Workability (brush painting)-The coating composition prepared in Examples 1 to 9 and Comparative Examples 1 to 4 was measured on a vertical portion of the cement by brush painting.

B) Adhesion strength-After preparing the specimen in the size of 65 × 65 × 25 mm based on KSL 5100, the coating composition prepared in Examples 1 to 9 and Comparative Examples 1 to 4 to a thickness of 0.3 kg / ㎡ After application, curing for 12 days at 85% relative humidity and 21 ~ 23 ℃ of temperature, test by 5.8.2 of KSF4715 (light finish wall coating material). The upper jig was firmly fixed. Five specimens were tested and evaluated with three average values except the maximum and minimum values.

C) Waterproof-The cement mold was prepared according to KSF2451 in Korea and demolded after 1 day, and then cured for 21 days at a relative humidity of 85% and a temperature of 21 to 23 ° C., thus prepared in Examples 1 to 9 and Comparative Examples 1 to 4. One coating composition was applied and room temperature curing was used for 15 days. The test method was evaluated by comparing the weight after immersion in water for 24 hours.

D) crack resistance-After coating the coating composition prepared in Examples 1 to 9 and Comparative Examples 1 to 4 to the cement mold, it was measured by adjusting the temperature to -10 ℃, 10 ℃, and 30 ℃.

division Example Comparative example One 2 3 4 5 6 7 8 9 One 2 3 4 Workability 4.4 4.4 4.6 4.5 4.5 4.6 4.5 4.6 4.6 1.7 1.8 1.8 1.9 Adhesive strength 4.5 4.5 4.6 4.4 4.5 4.5 4.5 4.5 4.6 4.0 4.2 4.2 4.3 Waterproof 4.6 4.6 4.7 4.6 4.4 4.5 4.6 4.5 4.6 2.3 2.3 2.5 2.5 Crack resistance 4.3 4.4 4.5 4.3 4.4 4.4 4.4 4.5 4.5 3.0 3.5 3.4 3.6

Through the above Table 1, workability, adhesive strength, water resistance, and resistance when the paint composition prepared in Examples 1 to 9 according to the present invention when compared to the paint composition of 1 to 4 in the brush painting on the vertical portion It was confirmed that the cracking properties were excellent.

The coating composition according to the present invention prevents adhesion failure, contamination, and lifting by providing thixotropy to the paint when painting the exterior wall of a building exterior wall, rooftop, water tank, swimming pool, water purification tank, and the like. Not only work is possible, but the viscosity is given when drag is applied, and when the drag is removed, the viscosity is restored and has an increasing property, which is capable of painting the brush. In addition, the coating composition does not have a peeling phenomenon of the outer wall due to the temperature difference, and has the effect of having physical properties such as adhesion, chemical resistance, weather resistance, heat resistance, soundproofing, and waterproofing.

Claims (7)

In the coating composition for exterior wall finishing, a) 100 parts by weight of a room temperature curable organic liquid resin; b) 10 to 200 parts by weight of glass beads; And _{c) Xonotlite (6CaO · 6SiO 2} · H 2 O), Tobermorite (5CaO · 6SiO 2 · 5H 2 O) or amorphous silica of 1 to 40 parts by weight Coating composition for exterior wall finishing comprising a. The method of claim 1, The coating composition for exterior wall finishing of said at least 1 type from which the room temperature hardening type organic liquid resin of said a) consists of epoxy type, acryl type, urethane type, alkyd type, polyester type, and polyvinyl chloride type. The method of claim 1, The particle size of the glass beads of b) is 200 mesh (mesh) to 3 mm, the coating composition for finishing the outer wall. The method of claim 1, The coating composition is a coating composition for the exterior wall finish further comprises a glass powder (glass power) having a particle size of 10 ㎛ to 1 mm in an amount of 10 to 400 parts by weight based on 100 parts by weight of the room temperature-curable organic liquid resin. The method of claim 1, The coating composition may be a chopped fiber obtained by cutting a glass fiber having a fiber diameter of 10 to 20 μm into a uniform stand length or a milled fiber obtained by grinding the average fiber length to 100 to 300 μm. 1 to 50 parts by weight based on 100 parts by weight of the curable organic liquid resin further comprises a coating composition for exterior wall finishing. delete The method of claim 1, The paint composition for exterior wall finishing further comprises an additive selected from the group consisting of pigments, fillers, diluents, dehumidifiers, flame retardants, surfactants, and antioxidants.