JPH0128161B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to coloring of road surfaces paved with cement concrete, cement mortar, asphalt concrete, etc., or similarly paved floor surfaces of tennis courts, poolsides, warehouses, hallways, balconies, etc. This relates to construction methods.

Conventionally, as a method for applying color to road or floor surfaces, a method of applying a solvent-based epoxy resin coloring paint or a urethane resin coloring paint once has been adopted. Although it is possible to obtain a durable painted surface with these methods, there is a risk of fire or poisoning due to the use of organic solvents, and since two liquids are mixed together, they are complicated by measuring, uniformly mixing, etc. There are various problems such as the fact that the construction requires a high level of skill, the colored paint is expensive, and when repairing, it requires a great deal of labor and expense to prepare the base. There is also a method of directly applying a synthetic resin aqueous emulsion colored paint, but this method cannot be said to be sufficient as a coating film of the desired thickness cannot be obtained.

In view of this situation, the inventors of the present invention have conducted intensive research and have found that the conventional drawbacks can be overcome by adopting a construction method in which two coats are applied using specific room-temperature film-forming compositions each having a different composition. The present invention was completed based on the discovery that it is possible to obtain a coated surface that is both durable and durable.

That is, in the present invention, an undercoat composition having the following composition (a) is applied to a road surface or a floor surface in an amount of 0.5 to 5 kg/m ² and dried, and then a color composition having the following composition (b) is applied to the dried coated surface. The present invention relates to a color application method characterized in that the undercoat composition is coated and dried in an amount of 0.1 to 3 kg/m ² and equivalent to 0.2 to 0.6 times the amount of the undercoat composition.

Note (a) Contains an acrylic polymer emulsion and a filler in a proportion such that the filler is in the range of 25 to 400 parts by weight per 100 parts by weight of the acrylic polymer emulsion (in terms of non-volatile content), and further has an average particle diameter. is 80
A room-temperature film-forming undercoat composition containing no color pigment and comprising aggregate of ~600 μm in the range of 10 to 200 parts by weight based on 100 parts by weight of the composition excluding the aggregate.

(b) Contains an acrylic polymer emulsion and a filler in a proportion such that the filler is in the range of 25 to 400 parts by weight per 100 parts by weight of the acrylic polymer emulsion (in terms of non-volatile content), and further does not contain a coloring pigment. A color composition consisting of.

The acrylic polymer emulsion used in the present invention is obtained by emulsion polymerization of monomer components containing acrylic esters and/or methacrylic esters as main components by a known procedure. If a resin emulsion other than an acrylic polymer emulsion is used, a colored paved surface with excellent adhesiveness and weather resistance cannot be obtained. Usually, acrylic polymer emulsions having a concentration of 30 to 70% by weight are effectively used.

Examples of the filler include known extender pigments such as calcium carbonate, clay, talc, barium sulfate, and asbestos, which are used in a proportion of 25 to 400 parts by weight based on 100 parts by weight of the nonvolatile content of the emulsion. do. If the amount used is less than 25 parts by weight, opacification will not occur. On the other hand, if it is used in an amount exceeding 400 parts by weight, the relative amount of the film-forming acrylic polymer emulsion decreases, and the film-forming properties of the undercoat composition and topcoat composition deteriorate.

Examples of the aggregate include silica sand, ceramic powder, river sand, and crushed stone. The particle size of the aggregate ranges from 80 to 600 μm. Examples of aggregates having this particle size include silica sand of sizes 5 to 8. Particle size is 80μm
If the thickness is less than 600μm, it will be difficult to achieve the strength of the coating itself and the adhesion to the base of the coating, and there will be a problem that a thick film will not be obtained.On the other hand, if it exceeds 600μm, the smoothness of the coating surface will deteriorate It is damaged and a beautiful coating film cannot be obtained. The amount of aggregate in the undercoat composition is in the range of 10 to 200 parts by weight based on 100 parts by weight of the composition excluding the aggregate. If the amount of aggregate used is less than 10 parts by weight, the adhesive reinforcement effect on the base of the paint film will be insufficient and it will be difficult to obtain a thick film, while if it exceeds 200 parts by weight, the strength of the paint film itself will decrease. , which is undesirable because it reduces the durability of the colored paved surface. Although aggregate is an essential component of the undercoat composition, it can also be incorporated into the color composition if necessary.

Examples of coloring pigments include known organic or inorganic coloring pigments such as titanium oxide, Bengara, yellow lead, and phthalocyanine blue.One or more of these pigments may be used to obtain a beautiful painted surface. Used according to purpose. Naturally or artificially colored aggregates can also be used as coloring pigments.

Both the undercoat and color composition of the present invention need to be film-formable at room temperature. Depending on the type of polymer composition in the acrylic polymer emulsion used, the composition may not be able to form a film at room temperature, but in such cases, a plasticizer such as dibutyl phthalate or dioctyl phthalate may be used. , butyl cellosolve, butyl carbitol acetate, and other cellosolves and carbitols; 224-trimethylpentanediol monoisobutyrate; alcohols such as benzyl alcohol; and solvents such as toluene and xylene. It is sufficient to use the film to form a film at room temperature. Furthermore, for the purpose of adjusting the viscosity and viscosity of the composition and imparting workability, water-soluble or water-dispersible polymer thickeners such as celluloses such as methylcellulose and hydroxyethylcellulose, or polycarboxylic acid-based polymers such as sodium polyacrylate are used. agent, finely powdered silica, synthetic polymer surfactant, etc. Also, a dispersant,
Wetting agents, antifoaming agents, freeze stabilizers, preservatives, antifungal agents,
Other known additives can be used. It is convenient to adjust the nonvolatile content of the composition excluding aggregates to a range of 30 to 80% by weight.

It is also possible to incorporate rubber powder and/or fibrous substances such as glass fibers into the undercoat and color compositions to improve workability and finish feel. Furthermore, the strength and drying properties of the coating film can be improved by adding an appropriate amount of cement.

There are no particular restrictions on the method for preparing the composition of the present invention.
It can be prepared in various ways. For example, a mixture of an acrylic polymer emulsion and a filler is prepared in advance, the mixture is divided into two parts immediately before color application, aggregate is added to one of the mixtures to form an undercoat composition, and the remaining mixture is divided into two parts. It can be prepared by blending color pigments into a color composition. However, the present invention is not limited only to this preparation method.

In the color application method of the present invention, first, 0.5% of an undercoat composition of a specific composition as described above is applied to the road surface or floor surface.
After coating and drying in an amount of ~5 Kg/m ² , that is, after undercoating, a color composition having a specific composition as described above is applied to the dry coated surface at an amount of 0.1 to 3 Kg/m ² and 0.2 to 0.6 with respect to the undercoat composition. This is achieved by applying and drying an amount equivalent to twice the amount, that is, by overcoating. If the coating amount of the undercoat composition is less than 0.5 kg/m ² , it will not be possible to obtain a smooth undercoat layer that also serves to adjust unevenness when the road or floor surface is uneven;
If an amount exceeding Kg/m ² is used, the durability of the coating film will decrease.

If the amount of topcoat composition applied is less than 0.1 kg/ ^m2 , a beautiful colored paved surface cannot be obtained, and even if the amount exceeds 3 kg/ ^m2 , no improvement in performance commensurate with the amount used cannot be expected. This will only lead to higher costs. Furthermore, if the amount of the topcoat composition is less than 0.2 times the amount of the undercoat composition, it will be difficult to finish a beautiful colored paved surface, and if it exceeds 0.6 times, the effect of using the undercoat composition will not be seen. It disappears. There is no particular restriction on the number of times of coating for both top coating and undercoating, but it is preferable to perform each coating within the range of 1 to 3 times.

In applying each composition, conventionally known means may be employed, such as spraying,
This can be done using tools such as brushes, broomsticks, rubber rakes, trowels, and rollers. The time required for the applied composition to dry cannot be determined as it varies depending on weather conditions and construction environment, but generally it takes less time in the summer.
It takes 0.5 to 3 hours, and 2 to 6 hours in winter. As a result, even if the road or floor surface has some unevenness, the undercoat layer can adjust the unevenness and obtain a smooth surface, and a thick film can be obtained, and a painted surface with excellent durability and beautiful finish can be obtained. Can be done. By appropriately changing the type and amount of the acrylic polymer emulsion, filler, and additives used in the color composition and undercoat composition, as well as the size and blending ratio of the aggregate, you can freely design the finish. It is possible. In addition, before applying the undercoat composition, a solvent-based epoxy resin, urethane resin, acrylic resin, or synthetic resin water-based emulsion is applied as a primer to improve the adhesion between the road surface or floor surface and the undercoat layer. Good too. It is effective when the road or floor is made of cement concrete or cement mortar. Also within the scope of the present invention is a method of applying and drying a composition comprising a color composition and an aggregate on a dry undercoat surface, and then applying and drying a color composition.

The composition of the present invention is water-based and forms a film at room temperature, so it is not complicated to handle, there are no problems with fire, poisoning, or pollution, and it can be easily applied without requiring a high level of skill. It has the advantage of being able to carry out repairs without extensive ground preparation. It is economical because there is no need to use expensive pigments in the undercoat layer. Furthermore, since an acrylic polymer emulsion is used, it has excellent weather resistance, water resistance, alkali resistance, impact resistance, waterproofness, etc. Furthermore, since the undercoat composition contains aggregate with a specific particle size, the strength of the coating film itself is high, and it also has excellent adhesion to the substrate, resulting in long-term durability and a coating that also exhibits an anti-slip effect. Get a face.

Examples will be shown next, but the present invention is not limited to the examples. In addition, parts in the examples are parts by weight, and % is weight %.

Example 1 0.5 parts of butyl carbitol acetate, 75 parts of calcium carbonate, 0.75 parts of sodium hexametaphosphate for 100 parts of an acrylic ester-methacrylic ester copolymer emulsion having a minimum film formation temperature of 0° C. and a non-volatile content of 50%. A composition consisting of 8 parts of a 3% methyl cellulose aqueous solution, 75 parts of water, and an appropriate amount of antifoaming agent was prepared, and 150 parts of No. 6 silica sand was added to 100 parts of the composition to obtain an undercoat composition.

0.5 parts of butyl carbitol acetate, calcium carbonate per 100 parts of the above copolymer emulsion
30 parts, Bengara 10 parts, sodium hexametaphosphate
0.4 parts, 6 parts of 3% methylcellulose aqueous solution, 40 parts of water
A colored composition was prepared, and 100 parts of No. 7 silica sand was added to 100 parts of the composition to obtain a color composition.

An undercoat composition was applied to an asphalt concrete road surface at a rate of 2 kg/m ² using a rubber rake to obtain a flat painted surface. After this painted surface had dried, a color composition was applied at a rate of 1 kg/m ² using a rubber rake, dried, and colored. No abnormalities were observed on the colored road surface even after one year.

Example 2 3 parts of butyl carbitol acetate, 40 parts of calcium carbonate, and 0.4 parts of sodium hexametaphosphate per 100 parts of an acrylic ester-methacrylic ester copolymer emulsion with a minimum film formation temperature of 20°C and a non-volatile content of 50%. A composition consisting of 6 parts of a 3% hydroxyethyl cellulose aqueous solution, 40 parts of water, and an appropriate amount of antifoaming agent was prepared, and 130 parts of No. 7 silica sand was added to 100 parts of the composition to obtain an undercoat composition.

For 100 parts of the above emulsion, 3 parts of butyl carbitol, 20 parts of calcium carbonate, 5 parts of phthalocyanine green, 0.25 parts of sodium hexametaphosphate
parts, 3% hydroxyethyl cellulose aqueous solution 5
25 parts of water and an appropriate amount of antifoaming agent were mixed to prepare a colored composition, and 80 parts of No. 8 silica sand was blended to 100 parts of the composition to obtain a color composition.

The undercoat composition was applied with a metal trowel in an amount of 2 kg/m ² onto a cement concrete floor surface that had previously been coated with a solvent-based acrylic resin at a rate of 200 g/m ² as a primer and dried. Next, on the dry painted surface,
The color composition was applied with a metal trowel in an amount of 1 kg/m ² and dried to perform color application. A smooth and beautifully painted floor surface was obtained. No abnormalities were observed on the colored floor surface even after one year.

Example 3 4 parts of butyl carbitol acetate, 40 parts of calcium carbonate, 10 parts of red iron, and hexamethalin were added to 100 parts of an acrylic ester-methacrylic ester copolymer emulsion with a minimum film formation temperature of 30°C and a non-volatile content of 50%. Sodium acid 0.5 part, Neugen DS-601 (Daiichi Kogyo Seiyaku Co., Ltd. product) 5
A color composition was obtained consisting of 4 parts of % aqueous solution and an appropriate amount of antifoaming agent.

The undercoat composition used in Example 1 was applied to the asphalt concrete surface using a rubber rake in an amount of 2 kg/m ² to obtain a flat painted surface. After this painted surface has dried, apply 0.5% of the above color composition.
It was applied with a brush in an amount of Kg/m ² , dried and colored. No abnormalities were observed on the colored surface even after one year.

Comparative Example 1 Color coating was performed by repeating the same operations as in Example 1 except that No. 7 silica sand was not used in the undercoat composition. When the colored surface was observed after one year, it was found that some peeling and cracking had occurred.

Comparative Example 2 In Example 3, the application amount of the undercoat composition was
Color construction was carried out by repeating the same operations as in Example 3 except that the amount was 0.2 Kg/m ² . After drying, the effect of adjusting unevenness by the undercoat composition was not exhibited on the surface, and the pattern of the base appeared on the surface, making it impossible to obtain a smooth color-applied surface. Furthermore, when we observed the color-applied surface after one year, we found areas where peeling and cracking had occurred.

Claims (1)

[Scope of Claims] 1. After applying and drying the undercoat composition of the composition (a) below in an amount of 0.5 to 5 kg/m ² on a road or floor surface, a color having the composition of the following (b) is applied to the dry coated surface. composition from 0.1
3Kg/ ^m2 and 0.2 to 0.6 for the basecoat composition
A color application method characterized by applying and drying an amount equivalent to double the amount. Note (a) Contains an acrylic polymer emulsion and a filler in a proportion such that the filler is in the range of 25 to 400 parts by weight per 100 parts by weight of the acrylic polymer emulsion (in terms of non-volatile content), and further has an average particle diameter. is 80
A room-temperature film-forming undercoat composition containing no color pigment and comprising aggregate of ~600 μm in the range of 10 to 200 parts by weight based on 100 parts by weight of the composition excluding the aggregate. (b) Contains an acrylic polymer emulsion and a filler in a proportion such that the filler is in the range of 25 to 400 parts by weight per 100 parts by weight of the acrylic polymer emulsion (in terms of non-volatile content), and further does not contain a coloring pigment. A color composition consisting of.