KR20060037108A - Aqueous paint composition for preventing sticker from being adhered to wall - Google Patents

Abstract

 The aqueous coating composition for preventing sticking includes 10 to 50 parts by weight of the extender pigment having a particle size of 8 to 80 μm, 2 to 10 parts by weight of the siloxane organic compound, and 0.1 to 2 parts by weight of the amine compound. By using the water-based coating composition for preventing the sticking of the sticker, it is possible to significantly reduce the appearance damage of the building wall by lowering the possibility of sticking the sticker and easily removing the attached sticker by only the physical properties of the paint itself without a separate process.

Description

Aqueous paint composition for preventing sticker from being adhered to wall}

The present invention relates to a coating composition, and more particularly, to an aqueous coating composition that can prevent the sticking of the coating by coating only the aqueous coating on the wall without any additional process.

Water-based interior paints on general concrete surfaces can perform aesthetic functions not only by protecting the concrete surface but also by assigning colors, but when a sticker such as an advertisement sticker is attached, the sticker is easily attached as well as a strong adhesive force over time. Due to the disadvantage that the sticker is not easily removed. The outer walls of shopping malls and the like are exposed to air pollution and contamination by hand. However, in recent years, the contamination of the wall surface by sticker advertisements, etc. has become a greater factor that hurts the aesthetics of the building.

In the case of conventional paints for the purpose of preventing sticking, most of oil paints and sheet products are used. In the case of oil paints, the silicone component used for low surface tension has an advantage in stability in oil paints. However, by using glass beads, etc. to make irregularities to weaken the adhesion of the sticker, complex professional system coating such as flooring and top coating is required, and since it is oil-based, it is necessary to use the thinner to improve worker's health, environmental pollution and safety. Not preferred in In addition, due to the dense coating film of the oil paint film and low surface tension due to the silicon component has a disadvantage that it is difficult to repaint. Therefore, due to the various disadvantages listed above, the antifouling paint has a limitation in its use.

An object of the present invention is to provide a water-based coating composition that can be repainted by minimizing the contact surface of the coating film surface and the sticker surface and excellent in the sticking prevention effect.

Aqueous coating composition for preventing adhesion of stickers according to an embodiment of the present invention for achieving the above object is 10 to 50 parts by weight of the extender pigment having a particle size of 8 to 80 ㎛, 2 to 10 parts by weight of siloxane organic compound, 0.1 to amine compound 2 parts by weight.

Using the aqueous coating composition for preventing the sticking of the sticker makes it difficult to attach the sticker on the wall of the building and the removal of the sticker once attached.

Hereinafter, an aqueous coating composition for preventing sticking according to an embodiment of the present invention will be described.

The aqueous coating composition contains a coloring pigment such as titanium dioxide, which is generally used, and the above-mentioned extender pigment. In the aqueous coating, the extender pigment not only functions to reinforce physical properties and to form a coating film, but also serves to prevent the adhesive material of the sticker from sticking to the coating film surface by forming a fine unevenness, that is, a micro structure on the surface of the coating film. At this time, the extender pigment used is a material having a spherical or irregular particle shape. As the extender pigment, silica or calcium carbonate is preferable. The plate-shaped silicate pigments have relatively little concave-convex effect due to the plate-like arrangement in the case of the use of pigments having the same particle diameter in forming the concave-convex surface of the coating film. In addition, the particle size and content of the extender pigment may also be important in order to prevent sticking of the sticker, and the particle size of the extender pigment is preferably 8 to 80 μm. If the particle size of the extender pigment is less than 8 μm, the unevenness is not large, and the close contact with the sticker can be easily performed within one week after the coating film is formed. If the particle size of the extender pigment exceeds 80 μm, the sticker may be caused by severe irregularities. Although it is difficult to attach, the surface of the coating is likely to be damaged due to the pigment falling easily in the coating or contamination by external air pollutants or hands. The aqueous coating composition may also include a extender pigment outside the range of the particle diameter. This is included to improve the physical properties of general paints. However, the particle size of the extender pigment used to prevent sticking should satisfy the above range.

The extender pigment is preferably contained 10 to 50 parts by weight in the total aqueous coating composition. When the sieving pigment is less than 10 parts by weight, the unevenness may be small, so that adhesion with the sticker may be easily performed at the initial stage of drying the coating. When the sieving pigment is more than 50 parts by weight, the contamination may be caused by dust or air in the air rather than by adhesion with the sticker. easy.

The present invention also includes 2 to 10 parts by weight of the siloxane organic compound and 0.1 to 2 parts by weight of the amine compound. The siloxane organic compound lowers the surface tension of the coating surface after drying the coating film, thereby imparting water repellency and making it difficult to attach contaminants. When the siloxane organic compound is less than 2 parts by weight, the surface tension of the initial state of drying of the coating film may not be lowered, and the sticker may be easily adhered. When the amount of the siloxane exceeds 10 parts by weight, the wetting on the body itself may not be well performed. . As said siloxane organic compound, the polydimethylsiloxane which has an amino functional group and an amino alkyl functional group is preferable. The siloxane organic compound consists of a polar part having a strong adhesion and arrangement toward the pigment in the coating film in terms of its structure and a lipophilic part showing the low surface tension property of the coating film at the surface.

It is preferable that the amine compound is contained in an amount of 0.1 to 2 parts by weight. When the amine compound is less than 0.1 part by weight, the storage stability of the paint is deteriorated, and at the same time, the phenomenon of the brush is easily hardened when the brush is painted. This hardening is noticeable when using a colorant. On the other hand, if the content exceeds 2 parts by weight, the odor is generated and the polar portion of the siloxane organic compound is stabilized, so that the alignment to the pigment does not occur well during the drying process, and as a result, low surface tension is hardly obtained in the initial dry coating state. As the amine compound, a relatively volatile low molecular weight amine compound such as diethylethanolamine, 2-amino-2-methyl-1-propanol, normal butyl diethanolamine, triethylamine, ammonia water or the like is preferable. An amine compound having a molecular weight above the oligomer may be weak in water resistance.

As such, by applying a predetermined size of the extender pigment, the siloxane organic compound and the amine compound to a general internal aqueous formulation, it is possible to exhibit a sticking preventing effect.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, Examples are only for illustrating the present invention, the present invention is not limited to the following Examples.

Example 1

In a paint mixing flask, 26.35 wt% water, 0.7 wt% dispersing wetting agent, 1.5 wt% antifreeze, 0.25 wt% antifoam, 0.15 wt% preservative, 25 wt% titanium dioxide pigment, 10 wt% 70 Μm silica pigment, 5 wt% 50 μm calcium carbonate, 10 wt% 1 μm calcium carbonate, 0.25 wt% thickener, 0.8 wt% aqueous ammonia, polydimethyl with 5 wt% amino functionality An aqueous paint for preventing sticking was prepared by adding siloxane and 15% by weight of an acrylic emulsion binder.

Example 2

21.65 wt% water, 0.7 wt% dispersing wetting agent, 1.5 wt% antifreeze, 0.25 wt% antifoam, 0.15 wt% preservative, 20 wt% titanium dioxide pigment, 33 wt% Charged a 24 μm silica pigment, 0.25 wt% thickener, 0.5 wt% 2-amino-2-methyl-1-propanol, 7 wt% polydimethylsiloxane with amino functionality and 15 wt% acrylic emulsion binder To prepare an aqueous coating material for preventing sticking.

Example 3

21.95 wt% water, 0.7 wt% dispersing wetting agent, 1.5 wt% antifreeze, 0.25 wt% antifoam, 0.15 wt% preservative, 25 wt% titanium dioxide pigment, 20 wt% 36 Μm sized silica pigment, 10 wt% 1 μm size calcium carbonate, 0.25 wt% thickener, 0.2 wt% dimethylethanolamine, polydimethylsiloxane with 5 wt% amino functionality and 15 wt% acrylic emulsion binder Was prepared to prepare an aqueous coating material for preventing sticking.

Example 4

16.15 wt% water, 0.7 wt% dispersing wetting agent, 1.5 wt% antifreeze, 0.25 wt% antifoam, 0.15 wt% preservative, 20 wt% titanium dioxide pigment, 35 wt% An aqueous coating material for preventing sticking was prepared by adding a calcium carbonate having a size of µm, 0.25% by weight of thickener, 1.0% by weight of triethylamine, 10% by weight of polydimethylsiloxane having an amino function, and 15% by weight of an acrylic emulsion binder. .

Example 5

22.35 wt% water, 0.7 wt% dispersing wetting agent, 1.5 wt% antifreeze, 0.25 wt% antifoam, 0.15 wt% preservative, 20 wt% titanium dioxide pigment, 27 wt% 30 in a paint mixing flask Μm size silica pigment, 5 wt% 1 μm calcium carbonate, 0.25 wt% thickener, 1.8 wt% 2-amino-2-methyl-1-propanol, polydimethylsiloxane with 6 wt% amino functional groups And 15% by weight of the acrylic emulsion binder was added to prepare a paint.

Comparative Example 1

15.12 wt% water, 0.7 wt% dispersing wetting agent, 2.5 wt% antifreeze agent, 0.25 wt% antifoam, 0.15 wt% preservative, 23 wt% titanium dioxide pigment, 0.28 wt% thickener in a paint mixing flask , 55% by weight of the acrylic emulsion binder, 3% by weight of the coating agent was prepared to prepare an aqueous coating.

Comparative Example 2

32.17 wt% water, 0.7 wt% dispersing wetting agent, 1.5 wt% antifreeze, 0.25 wt% antifoam, 0.15 wt% preservative, 15 wt% titanium dioxide pigment, 10 wt% 1 Calcium micrometer in size, 5 wt% of 3 μm calcined clay, 10 wt% of 7 μm of talc, 0.23 wt% of thickener, 23 wt% of acrylic emulsion binder, 1 wt% of coating agent An aqueous paint was prepared.

The dispersing wetting agents used in Examples 1 to 5 or Comparative Examples 1 to 2 were Tego Dispers 735W of Tego, Germany, cryoprotectant, ethylene glycol, antifoaming agent, BYK-024 from Biwaike, Germany, and preservative, Proxel XL- of Genca, UK. 2, the thickening agent of Natrosol 250HHR of Cornel Bross, the TEXANOL of Eastman, the acrylic emulsion binder is a synthetic resin having a composition of Tg 22 ℃ prepared by copolymerization of styrene, methyl methacrylate, butyl acrylate monomer.

Paint property test

The paints of the above examples were prepared by experiment and test specimens by the method of twice painting on the slate plate.

1. Sticker removal

After sticking the adhesive sticker on the dried specimens on a day, it was determined whether the residue of the sticker remained on the coating film and whether the adhesive itself was easily made.

2. Painting workability

The state of the brush at the time of painting or the state of the wet coating film was visually confirmed by brush painting on the slate plate.

3. Repaintability

After the coated specimen was dried at 60 ° C. for 5 hours in an oven to arbitrarily create an elapsed time, the coating was applied twice at room temperature, and the wet coating state at the time of coating was visually confirmed.

4. Dry coating appearance

It was visually confirmed whether the coating film of the dry coating specimen coated twice by brush coating was creering.

5. Dichroic

1% of a general aqueous colorant was added to the coating material of the Example and the dichroism was confirmed through comparison of the color difference between the first coating and the second coating.

6. Water resistance

After immersing the dried specimen in water for 48 hours, it was taken out and observed for abnormalities of the coating film.

7. Alkali resistance

 One day dried specimens were immersed in saturated aqueous calcium hydroxide solution for 48 hours and then taken out to observe the abnormality of the coating film.

The physical property test results are shown in Table 1 below.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Sticker removable △ ○ ○ ◎ ○ ×× × Painting workability ○ ○ △ ○ ○ ○ ○ Repainting ○ ○ ○ △ ○ ○ ○ Dry coating appearance ○ ◎ △ ○ ○ ◎ ◎ Dichroic ○ ○ ○ ○ ○ ○ ○ Water resistance ◎ ◎ ◎ ○ △ ◎ △ Alkali resistance ○ ○ ○ ○ △ ○ ○

◎: Very good ○: Excellent △: Good X: Poor XX: Very bad

Referring to Table 1, the anti-sticking water-based paint prepared by the above Example showed an excellent anti-sticking function while maintaining the physical properties of the basic paint.

Thus, by providing an aqueous paint having a composition containing a certain size of pigment and a siloxane organic compound and an amine compound, it is easy to prevent the adhesion and removal of stickers that can be attached to the building wall, thereby significantly reducing the appearance damage of the building wall. Can be. Also, unlike the oil-based paint prevention method, the general water-based coating method can easily prevent the appearance damage of the building wall.                     

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified without departing from the spirit and scope of the invention described in the claims below. And can be changed.

Claims (4)

An aqueous coating composition for preventing adhesion of stickers, comprising 10 to 50 parts by weight of extender pigments having a particle size of 8 to 80 μm, 2 to 10 parts by weight of siloxane organic compound, and 0.1 to 2 parts by weight of amine compound. The aqueous coating composition of claim 1, wherein the extender pigment comprises silica or calcium carbonate. The aqueous coating composition for preventing adhesion of stickers according to claim 1, wherein the siloxane organic compound is a polydimethylsiloxane having an amino functional group or an amino alkyl functional group. The compound of claim 1, wherein the amine compound comprises at least one compound selected from the group consisting of diethylethanolamine, 2-amino-2-methyl-1-propanol, normal butyl diethanolamine, triethylamine and ammonia water. An aqueous coating composition for preventing adhesion of stickers, characterized by the above-mentioned.