JPH09111152A - Colorant for concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a colorant for concrete which, when sprayed on a colored concrete surface formed by a simultaneous carting and coloring method, penetrates and uniformly colores the surface and enables the repair excellent in durability by mixing a specific dye or pigment dispersion with a propellant. SOLUTION: A dye or pigment dispersion is prepd. by dissolving 0.5-2 pts.wt. developer comprising at least one compd. selected from among water-sol. alcohol, ketone, ether, and ester in 1 pt.wt. compsn. comprising 5-30wt.% dye or pigment, 0.01-5wt.% dispersant comprising spiculisporic acid or its salt produced by a fermentation method, and 65-90wt.% water. The dispersion is charged into an aerosol spray can, into which is then forced a propellant comprising at least one substance selected from among dimethyl ether, a liquefied petroleum gas, a liquefied natural gas, and liquefied carbon dioxide in an amt. of 15-50wt.% of the dispersion, thus giving a colorant sprayable as a homogeneous mist.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a coloring material for concrete. More specifically, the present invention relates to a coloring material for concrete which can be filled in an aerosol type spray can and easily sprayed on the concrete surface at a construction site to permeate and color the concrete surface.

[0002]

2. Description of the Related Art In recent years, a construction method has been widely used in which a concrete surface is provided with an uneven pattern to give an excellent appearance to a building or the like. Furthermore, there is a construction method in which a coloring material is brought into contact with the concrete surface before being dried and hardened, so that a natural coloring can be achieved. The inventors of the present invention have made a concrete permeation layer containing polyethylene oxide and a dye or a pigment as a main component in advance, from a foamed resin in which an irregularity pattern opposite to the irregularity pattern appearing on the concrete surface cast as a base material is formed. The present invention provides a coloring material for concrete adhered to a concrete formwork for concrete and a coloring construction method at the time of casting using the coloring material (Japanese Patent Publication No. 6-102584), and has already been widely implemented. In this construction method, the coloring may be partially faded due to the construction conditions, the concrete surface may be damaged when the formwork is dismantled after the concrete is hardened, and the coloring may be removed, or the concrete may be misused after the construction is completed. The surface may be scratched or contaminated. As a repair of such coloring of the concrete surface,
Even if the paint is brushed or repaired with a commercially available spray can type oil-based paint, the paint layer shines unnaturally and the difference from the original coloring is obvious, so the same paint used when placing concrete The composition must be spray painted with an air spray gun. However, in order to repair a small area of a defect with a spray gun, it is necessary to prepare a spray gun and a compressor, and a paint composition also needs a large excess amount compared to the area of the repaired area, which is a waste. In many cases, there is a demand for a coloring material that can be easily repaired.

[0003]

DISCLOSURE OF THE INVENTION The present invention is to fill an aerosol type spray can, and spray-paint on a concrete colored surface formed by a coloring construction method at the time of placing easily at a construction site to permeate and color the concrete surface. The present invention has been made for the purpose of providing a coloring material for concrete which is excellent in durability and can be repaired without uneven color.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that a dye or pigment,
By adding a developing agent and a propellant to a composition in which a dispersant and water are mixed in a specific ratio, it is possible to fill an aerosol type spray can and easily spray-paint on the concrete surface. It has been found that a coloring material for concrete which gives a colored surface formed by a coloring construction method and a repair surface without color unevenness can be obtained, and the present invention has been completed based on this finding. That is, the present invention provides (1)
Dye / pigment prepared by dissolving 5 to 30% by weight of a dye or pigment, 0.01 to 5% by weight of a dispersant, and 65 to 90% by weight of water, and adding 0.5 to 2 times by weight of a developing agent to dissolve and disperse the same. A coloring material for concrete, characterized by mixing a dispersion with a propellant, (2) a coloring material for concrete according to item (1), wherein the dispersing agent is a surfactant produced by a fermentation method. ,
(3) The surfactant produced by the fermentation method is spiculisporic acid or a salt thereof, the coloring material for concrete according to the item (2), (4) the developing agent is a water-soluble alcohol, a ketone, 1 or 2 selected from ethers and esters
The coloring agent for concrete according to the item (1), the item (2) or the item (3), which is a compound of one or more kinds, or the propellant (5),
Item (1), (2), (3) or (4), which is one or more substances selected from dimethyl ether, liquefied petroleum gas, liquefied natural gas and liquefied carbon dioxide. The present invention provides a coloring material for concrete.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The colorant for concrete surface of the present invention comprises 5 to 30% by weight of a dye or pigment, and a dispersant of 0.01 to
A dye-pigment dispersion is used in which 0.5 to 2 times by weight of a developing agent is added to a composition consisting of 5% by weight and 65 to 90% by weight of water to dissolve and disperse the composition. In the present invention, the type of dye or pigment to be used is not particularly limited, it is possible to select a dye or pigment having a desired color tone from water-soluble or dispersible dyes or pigments, concrete penetration in the coloring method during casting By selecting the same dye or pigment as that used for forming the layer, it is possible to obtain a concrete colorant having no color unevenness. In the present invention, the proportion of the dye or pigment in the composition comprising the dye or pigment, the dispersant and water is 5 to 30.
%, And more preferably 10 to 20% by weight. If the proportion of the dye or pigment is less than 5% by weight of the composition, the dye-pigment dispersion may flow when spray-painted on the concrete surface, and it may be difficult to adhere the dye or pigment to the concrete surface in a sufficient concentration. There is. If the proportion of the dye or pigment exceeds 30% by weight of the composition, stable spray coating as an aerosol may be difficult. In the present invention, the dispersant can be used without particular limitation as long as it can form a dye or a pigment in the dispersion liquid, but the dispersant is a surfactant produced by a fermentation method. It is particularly preferable that the dispersant is spiculisporic acid or a salt thereof. In the present invention, the proportion of the dispersant in the composition consisting of the dye or pigment, the dispersant and water is 0.01 to 5% by weight, more preferably 0.1 to 3% by weight. If the proportion of the dispersant is less than 0.01% by weight of the composition, poor dye or pigment dispersion may occur. If the proportion of the dispersant exceeds 5% by weight of the composition, the adhesion of the dye or pigment to the concrete surface may be reduced. The surfactant produced by the fermentation method has a large effect of preventing the aggregation of dyes and pigments,
It has a low foaming property compared to synthetic surfactants, and there is no risk of causing problems due to foaming during coating. Further, the surfactant produced by the fermentation method has a large buffering performance, shows a stable surfactant effect in a high pH range, and since there is no fear of lowering the surface strength of concrete, it can be suitably used. it can. Among the surfactants produced by the fermentation method, spiculisporic acid having a structure represented by the formula [1] can be particularly preferably used. Spiculisporic acid can be used in the form of free acid, monosodium salt, monopotassium salt, disodium salt, dipotassium salt and the like.

Embedded image

In the present invention, it is preferable to uniformly disperse a composition comprising a dye or pigment, a dispersant and water. There is no particular limitation on the method of uniformly dispersing, for example,
A homomixer, a ball mill, a sand mill, etc. can be used. In the present invention, a dye / pigment dispersion is prepared by dissolving and dispersing a developing agent in a composition comprising a dye or pigment, a dispersant and water. The amount of developing agent added is 0,0 relative to the composition consisting of the dye or pigment, the dispersant and the water.
It is 5 to 2 times by weight, more preferably 0.7 to 1.5 times by weight of the composition, and particularly preferably 1 times by weight of the composition. If the amount of the developing agent added is less than 0.5 times the weight of the composition, stable spray coating as an aerosol may be difficult. When the amount of the developing agent to be added exceeds 2 times the weight of the composition, the dye / pigment dispersion will flow when spray-painted on the concrete surface, making it difficult to adhere the dye or pigment to the concrete surface in a sufficient concentration. There is a risk. In the present invention, as a developing agent, water-soluble alcohols, ketones,
It is preferable to use one or more compounds selected from ethers and esters. Examples of the water-soluble alcohols include methanol, ethanol, propanol, isopropanol, 1-butanol, 2-butanol, isobutanol, tert-butyl alcohol,
2-methoxyethanol, 2-ethoxyethanol, 2
-Isopropoxy ethanol, 2-butoxy ethanol, furfuryl alcohol, tetrahydrofurfuryl alcohol, diacetone alcohol and the like can be mentioned. Examples of the water-soluble ketones include acetone,
Methyl ethyl ketone, acetonyl acetone, etc. can be mentioned. As the water-soluble ethers, for example,
Examples thereof include dioxane, tetrahydrofuran, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, tripropylene glycol monomethyl ether. Among these developing agents, methanol, ethanol, isopropanol and methyl ethyl ketone can be preferably used, but ethanol can be particularly preferably used.

In the present invention, a propellant is mixed with a dye / pigment dispersion which is obtained by dissolving and dispersing a developing agent in a composition comprising a dye or pigment, a dispersant and water. The method of mixing the propellant is not particularly limited, but it is preferable to compulsorily inject the propellant using a pressure filling device after filling the dye / pigment dispersion in an aerosol spray can or the like. The propellant to be used is not particularly limited, and known propellants for aerosol can be used, but dimethyl ether (DME), liquefied petroleum gas (LPG), liquefied natural gas (LN. G) and liquefied carbon dioxide gas can be preferably used. These propellants may be used alone or in combination of two or more. In the present invention, the amount of the propellant used is not particularly limited, but it is 0.
It is preferably used in an amount of 15 to 0.4 times by weight, more preferably 0.2 to 0.3 times by weight based on the dye / pigment dispersion. The coloring material for concrete of the present invention can be spray-painted by ejecting it as a uniform mist from an aerosol spray can, and is spray-painted on the concrete surface despite containing no binder resin or the like. At this time, the dye or pigment is permeated and colored on the concrete surface, and the durability and the natural feeling are excellent, and it is possible to carry out the coloring by the coloring construction method at the time of casting and the repair coating without color unevenness.

[0008]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the present invention. Example 1 67.2 g of deionized water was mixed with 0.8 g of disodium spiculisporate as a dispersant and 12 g of a brown pigment, and the mixture was uniformly dispersed using a homomixer. To this mixed solution, 80 g of ethanol as a developing agent was added and mixed to prepare a pigment dispersion, which was filled in an aerosol spray can. Further, 40 g of dimethyl ether was forcedly injected into the aerosol spray can using a pressure filling device. Even when dimethyl ether was mixed with the pigment dispersion, neither thickening nor gelation of the pigment dispersion was observed, and a uniform mist was obtained when the pigment dispersion was sprayed from an aerosol spray can. When spray-painted on a non-colored hardened concrete surface and dried, it was possible to obtain a natural coloring without uneven color. In addition, scratches are created by punching out part of the concrete colored surface formed by the coloring construction method of the same color during casting.
When spray-painted and dried on top of that, there was no color unevenness and there was no discomfort in the repaired area. Example 2 The same operation as in Example 1 was repeated except that 80 g of isopropyl alcohol was used as a developing agent instead of 80 g of ethanol in Example 1. Even when dimethyl ether was mixed with the pigment dispersion, neither thickening nor gelation of the pigment dispersion was observed, and a uniform mist was obtained when the pigment dispersion was sprayed from an aerosol spray can. When spray-painted on a non-colored hardened concrete surface and dried, it was possible to obtain a natural coloring without uneven color. In addition, when a part of the concrete colored surface formed by the coloring construction method of the same color was punched out, a scratch was created, and when spray painting on it, there was no color unevenness and there was no discomfort at the repaired part. . Example 3 The same operation as in Example 1 was repeated except that 28 g of dimethyl ether and 12 g of LPG were used as a propellant instead of 40 g of dimethyl ether of Example 1. Even when dimethyl ether and LPG were mixed with the pigment dispersion, neither thickening nor gelation of the pigment dispersion was observed, and a uniform mist was obtained when the pigment dispersion was sprayed from an aerosol spray can. When spray-painted on a non-colored hardened concrete surface and dried, it was possible to obtain a natural coloring without uneven color. In addition, when a part of the concrete colored surface formed by the coloring construction method of the same color was punched out, a scratch was created, and when spray painting on it, there was no color unevenness and there was no discomfort at the repaired part. . Comparative Example 1 To 141.2 g of deionized water, 0.8 g of disodium spiculisporate as a dispersant, 12 g of a brown pigment and 6 g of polyethylene oxide as a sizing agent were mixed and uniformly dispersed using a homomixer. This pigment dispersion was filled in an aerosol spray can, and 40 g of dimethyl ether was forcibly injected using a pressure filling device. When dimethyl ether was added, this pigment dispersion liquid thickened and gelled, and even when sprayed, it did not become a mist and became a stream state, and it was impossible to make this pigment dispersion liquid into an aerosol. The pigment dispersion liquid of Comparative Example 1 is a composition that can be suitably used for forming a concrete permeation layer in the coloring method during casting, but it can be used as a spray paint by filling it in an aerosol spray can. I knew I couldn't. On the other hand, the pigment dispersions of Examples 1 to 3 do not thicken or gel even when the propellant is forcibly injected into the aerosol spray can because they contain the developing agent, and thus the spray paint It was able to be used suitably as.

[0009]

EFFECTS OF THE INVENTION According to the coloring material for concrete of the present invention, spray painting can be performed easily and easily by using an aerosol spray can. It is possible to obtain a coated surface which is excellent in feeling, has good durability, and has no color unevenness.

Claims (5)

[Claims] 1. Dye or pigment 5 to 30% by weight, dispersant 0.1.
A propellant is mixed with a dye / pigment dispersion liquid in which 0.5 to 2 times by weight of a developing agent is added to a composition consisting of 01 to 5% by weight and 65 to 90% by weight of water to be dissolved and dispersed. Characteristic coloring material for concrete. 2. The coloring material for concrete according to claim 1, wherein the dispersant is a surfactant produced by a fermentation method. 3. The coloring material for concrete according to claim 2, wherein the surfactant produced by the fermentation method is spiculisporic acid or a salt thereof. 4. The developing agent is one or two selected from water-soluble alcohols, ketones, ethers and esters.
Claims 1, 2 or 3 which are one or more compounds.
The coloring material for concrete described. 5. The propellant is one or two or more substances selected from dimethyl ether, liquefied petroleum gas, liquefied natural gas and liquefied carbon dioxide, claim 1, claim 2 and claim 3.
Alternatively, the coloring material for concrete according to claim 4.