JP2010037168A - Coating liquid for coloring calcium-based inorganic base material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coloring composition, with which a surface of a calcium-based inorganic base material can be colored so that voids (recesses and projections) in the surface of the base material are concealed, that is to say, the surface of the base material (ground material) is put out of sight, coating (coloring) can be carried out in such a state that the calcium-based inorganic base material and the coloring composition are unified, and the colored surface is hardened and the exfoliation of the colored part can be thereby prevented. <P>SOLUTION: The composition for coloring the calcium-based inorganic base material is constituted of at least two kinds of pigments (A) having different particle diameters, a resin (B) having a silanol group or a group convertible into a silanol group, and a water-soluble alkali silicate compound (C). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coloring composition for a calcium-based inorganic substrate, a coloring kit for a calcium-based inorganic substrate, a coloring method for a calcium-based inorganic substrate, and a colored calcium inorganic substrate.

  Attempts have been made to color products made of calcium-based inorganic base materials such as concrete, cement, gypsum, and stone used for building materials and buildings.

  As a method for coloring the calcium-based inorganic base material, for example, there is a method in which a pigment is mixed in advance with cement itself. In this method, voids (unevenness) on the surface of the substrate cannot be hidden, and the appearance of the substrate is poor.

  As another method, there is a method of spraying a pigment on the surface before the cement is hardened. However, this method requires a pigment to be sprayed before curing, is difficult to work, and cannot hide the voids (irregularities) on the substrate surface.

  Furthermore, a method of coloring the calcium-based inorganic base material after curing is also performed. For example, Patent Document 1 describes a coating composition containing a water-soluble alkali silicate compound and a pigment, and Patent Document 2 discloses a coating composition containing a dye, a water-soluble alkali silicate compound, and an aqueous solvent. A method for coloring a concrete substrate using an object is described. However, since the pigment is liberated when it is applied in a certain amount or more, it can be applied only in a small amount, and since the dye penetrates the substrate, the voids (unevenness) on the surface of the substrate cannot be hidden. Furthermore, when a dye is used, the dye is poor in weather resistance against ultraviolet rays, water, etc., and therefore easily fades.

In addition, a method of coloring using an organic solvent-based or water-based paint mainly composed of a resin is also performed. When this method is used, it is possible to hide the voids (unevenness) on the surface of the substrate. However, since the cement base material itself is not colored but only the colored coating film is adhered to the cement base material surface, the coating film is easily peeled off from the adhesive surface. Furthermore, organic solvent-based paints are not so preferable in consideration of the environment.
Japanese Patent Laid-Open No. 2002-211988 Japanese Patent Laid-Open No. 2002-179952

  The object of the present invention is to color the substrate surface so as to conceal voids (unevenness) on the surface of the calcium-based inorganic substrate, that is, to prevent the substrate surface (base) from seeping through, and An object of the present invention is to provide a coloring composition that can be integrally coated (colored) and can harden the colored surface to prevent peeling of the colored portion.

  The present invention is a calcium comprising at least two pigments (A) having different particle sizes, a resin (B) having a silanol group or a group that can be converted to a silanol group, and a water-soluble alkali silicate compound (C). A composition for coloring an inorganic base material is provided.

  Furthermore, the present invention provides a first coating solution containing at least two pigments (A) having different particle diameters and a resin (B) having a silanol group or a group that can be converted into a silanol group, and water-soluble silicic acid Provided is a calcium-based inorganic base material coloring composition comprising a second coating solution containing an alkali compound (C).

  Furthermore, the present invention provides a first coating solution containing at least two pigments (A) having different particle sizes and a resin (B) having a silanol group or a group that can be converted into a silanol group; and a water-soluble silicic acid A coloring kit for a calcium-based inorganic base material, comprising: a second coating liquid containing an alkali compound (C).

  The present invention also provides a method for coloring a calcium-based inorganic substrate, the method comprising at least two pigments (A) having different particle diameters, a resin having a silanol group or a group having a group convertible to a silanol group (B And a step of applying a coating solution containing the water-soluble alkali silicate compound (C).

  Furthermore, the present invention provides a method for coloring a calcium-based inorganic base material, which includes at least two pigments (A) having different particle diameters and a silanol group or silanol group on the calcium-based inorganic base material. A step of applying and drying a first coating solution containing a resin (B) having a convertible group; and a water-soluble alkali silicate compound (C) on the substrate surface to which the coating solution for coloring is applied The process of providing the 2nd coating liquid containing this is included.

  In one embodiment, the second coating liquid further contains a resin (B) having a group that can be converted into a silanol group.

  The present invention also provides a colored calcium inorganic base material colored using the coloring composition.

  According to the present invention, the surface of the substrate can be colored so as to hide the voids (unevenness) on the surface of the calcium-based inorganic substrate, that is, the substrate surface (underlying) is not transparent, and the calcium-based inorganic substrate Integrated painting (coloring) is possible, and the colored surface can be hardened to prevent peeling of the colored portion. That is, in the coloring of the calcium-based inorganic base material, the base material itself is not colored in advance, but the base material is covered with the base and the base material is covered and integrated with the base material.

(Calcium-based inorganic base material coloring composition)
The calcium-based inorganic base material coloring composition of the present invention (hereinafter sometimes simply referred to as “coloring composition”) comprises at least two pigments (A) (hereinafter simply referred to as (A ), A resin (B) having a silanol group or a group that can be converted to a silanol group (hereinafter sometimes referred to as a silanol group-containing resin (B) or simply (B)), and water-soluble It consists of an alkaline silicate compound (C) (hereinafter sometimes simply referred to as (C)). In the present specification, “calcium-based inorganic base material” refers to a base material made of concrete, cement, gypsum, stone or the like.

  Here, “configured” does not necessarily mean that all of (A) to (C) are mixed together, for example, (A) to (C) are mixed. Without mixing each of them independently; a mixture obtained by mixing (A) and (B) and a state existing as two types of (C); (A) and (B) The state which exists as two types of the mixture obtained by mixing (B) and (C), and the like obtained by mixing.

  In the present invention, a first coating solution containing at least two pigments (A) having different particle diameters and a silanol group-containing resin (B), and a second coating containing a water-soluble alkali silicate compound (C). It is preferable that the coating liquid is composed of two types of coating liquids, and it is more preferable that the second coating liquid further contains a silanol group-containing resin (B). In this case, the silanol group-containing resin (B) contained in the first coating liquid and the silanol group-containing resin (B) contained in the second coating liquid may be the same silanol group-containing resin or different silanol group-containing resins. Resin may be used.

The pigment used in the present invention is not particularly limited, and any pigment can be used as long as it does not adversely affect the coating solution, such as deteriorating the stability of the coating solution. The pigment may be either an inorganic pigment or an organic pigment, and may be derived from a chemical composition or a natural product. However, inorganic pigments are preferred because of environmental considerations for low carbon society such as CO ₂ emission reduction.

  Examples of pigments include red pigments (lead red, iron oxide red, etc.), yellow pigments (yellow lead (chrome yellow), zinc yellow (one type of zinc yellow and two types of zinc yellow)), and blue pigments (ultramarine blue). , Prussian blue (potassium ferrocyanide), cobalt blue, etc.), green pigment (cobalt green, chromium oxide, phthalocyanine green, etc.), black pigment (carbon black, titanium black, etc.), white pigment (zinc white, lead white, Lithopone, titanium dioxide, precipitated barium sulfate, barite powder, etc.).

  In the coloring composition of the present invention, among these pigments, at least two pigments having different particle sizes are used. That is, as long as at least two kinds of pigments having different particle diameters, the same color pigments or different color pigments may be used. In the case of pigments of the same color, the same pigments having different particle sizes may be used. For example, in the case of a red pigment, two or more types of red lead having different particle sizes may be mixed and used, and in the case of a black pigment, two or more types of carbon black having different particle sizes may be mixed. If the particle sizes are different, different pigments of the same color may be used, such as a mixture of red lead and iron oxide red, a mixture of carbon black and titanium black, and the like. In the present specification, “particle size” means an average particle size.

  In the coloring composition of the present invention, various pigments may be used in combination in order to obtain a target color tone. For example, when an orange color is desired, it is preferable to use a mixture of a red pigment and a yellow pigment.

  The particle size of the pigment used in the present invention is not particularly limited. Preferably, a pigment having a large particle size is combined with a pigment having a small particle size. The particle size of the large pigment is preferably 1 μm to 5 μm, more preferably 1 μm to 2 μm, and the particle size of the small pigment is preferably 0.1 μm to 1 μm, more preferably 0.1 μm to 0.5 μm. Further, when three or more pigments are combined, a pigment having a particle size between a large particle size and a small particle size may be included. When different color pigments are mixed and used, not only the particle sizes of the pigments of the respective colors are different, but also the particle sizes of the pigments of the respective colors may be different. The difference between the largest particle size and the smallest particle size among the pigments to be combined is preferably 0.5 μm to 4 μm in terms of more reliably concealing voids (irregularities) on the substrate surface and coloring more reliably. More preferably, it is 0.7 micrometer-2.5 micrometers, More preferably, it is 0.8 micrometer-2 micrometers.

  The mixing ratio of two or more pigments having different particle diameters can be appropriately set depending on the surface state of the applied calcium-based inorganic base material, the desired color tone, the desired film thickness, and the like. For example, when a large number of voids are present on the surface of the substrate, it is preferable to use an excessively small pigment having a small particle diameter. In this case, the pigment having a small particle size and the pigment having a large particle size can be blended preferably in a mass ratio of 80:20 to 60:40. When it is desired to make the coating thicker, it is preferable to use an excessively large pigment having a large particle diameter. In this case, the pigment having a small particle size and the pigment having a large particle size can be blended preferably in a mass ratio of 20:80 to 40:60.

  The resin (B) having a silanol group or a group convertible to a silanol group used in the present invention is not particularly limited as long as it is a resin having a silanol group or a group convertible to a silanol group. As the silanol group-containing resin (B), for example, acrylic resins and styrene-acrylic resins are preferably used.

  Examples of the group that can be converted to a silanol group include groups in which the hydroxyl portion of the silanol group is an alkoxy group, a halogen group, or the like (these can be converted to a hydroxyl group by hydrolysis or the like). The acrylic resin, styrene-acrylic resin and the like preferably contain a carboxyl group.

  Such a silanol group-containing resin (B) can be prepared, for example, in the form of an emulsion, or dissolved or dispersed in a solvent, preferably in the form of an aqueous emulsion.

  Only one type of silanol group-containing resin (B) may be used, or two or more types of silanol group-containing resins (B) may be used in combination.

The water-soluble alkali silicate compound (C) used in the present invention is not particularly limited as long as it is a water-soluble alkali silicate compound. Such a compound is generally represented by M ₂ O · nSiO ₂ (M is an alkali metal, and n is an integer of usually 2 to 4). Examples of the water-soluble alkali silicate compound (C) include sodium silicate (sodium orthosilicate, sodium sesquisilicate, sodium metasilicate, etc.), lithium silicate, potassium silicate and the like. Of these, sodium silicate represented by Na ₂ O.3SiO ₂ is preferably used.

  The water-soluble alkali silicate compound (C) forms an insoluble silicate compound by reaction with a polyvalent metal ion or by removing the alkali component (M) of the compound from the silica network of the compound. A concentrated aqueous solution of the water-soluble alkali silicate compound (C) is generally called water glass.

  Only one type of water-soluble alkali silicate compound (C) may be used, or two or more types of water-soluble alkali silicate compounds (C) may be used in combination.

  In the coloring composition of the present invention, the pigment (A) is preferably 10% by mass to the total mass of the pigment (A), the silanol group-containing resin (B), and the water-soluble alkali silicate compound (C). 50 mass%, silanol group-containing resin (B) is composed of 10 mass% to 50 mass%, and water-soluble alkali silicate compound (C) is composed of 20 mass% to 80 mass%, and (A) to (C) Are adjusted to 100% by mass in total. More preferably, the pigment (A) is 20% by mass to 40% by mass, the silanol group-containing resin (B) is 20% by mass to 40% by mass, and the water-soluble alkali silicate compound (C) is 30% by mass to 70% by mass. And (A) to (C) are prepared so as to be 100% by mass in total. In addition, when silanol group containing resin (B) is used with forms, such as an emulsion, content of silanol group containing resin (B) is the quantity converted into solid content (namely, resin content).

  When the coloring composition of the present invention is composed of the first coating liquid and the second coating liquid, the pigment (A) and the silanol group-containing resin (B) contained in the first coating liquid are: Preferably, it is contained in a mass ratio of 1: 1 to 15: 1, more preferably 1: 1 to 10: 1.

  Furthermore, when the coloring composition of the present invention is composed of the first coating liquid and the second coating liquid, it is preferable that the second coating liquid contains a silanol group-containing resin (B). . In this case, the silanol group-containing resin (B) and the water-soluble alkali silicate compound (C) are preferably contained in a mass ratio of 1: 2 to 1:15, more preferably 1: 2 to 1:10.

  Furthermore, when the coloring composition of the present invention is composed of the first coating liquid and the second coating liquid, examples of the solvent that can be used for the coating liquid include an aqueous solvent and an organic solvent. . The aqueous solvent refers to a mixed solvent of water or a water-soluble organic solvent (for example, alcohols such as methanol and ethanol) and water. As described above, from the viewpoint of consideration for the environment, an aqueous solvent is preferable, and water is particularly preferable.

(Coloring kit for calcium-based inorganic substrate)
The calcium-based inorganic substrate coloring kit of the present invention (hereinafter sometimes simply referred to as “coloring kit”) includes at least two pigments (A) having the different particle diameters and the silanol group-containing resin (B And a second coating solution containing the water-soluble alkali silicate compound (C). The first coating liquid and the second coating liquid are as described above.

  The coloring kit of the present invention includes specifications describing the coloring method, if necessary.

(Method for coloring calcium-based inorganic base material)
The calcium-based inorganic base material coloring method of the present invention comprises a calcium-based inorganic base material having at least two pigments (A) having different particle diameters, a resin having a silanol group or a group that can be converted into a silanol group ( B), and a step of applying a coating solution containing the water-soluble alkali silicate compound (C) (hereinafter may be referred to as “first coloring method”).

  Furthermore, the coloring method of the calcium type inorganic base material of this invention has at least 2 sorts of pigments (A) which have the said different particle size in the calcium type inorganic base material, and the group which can be converted into the said silanol group or a silanol group. A step of applying and drying a first coating solution containing a resin (B); and a second surface containing the water-soluble alkali silicate compound (C) on the substrate surface to which the coating solution for coloring is applied. A step of applying the coating liquid (hereinafter sometimes referred to as “second coloring method”).

  In the first coloring method of the present invention, a mixture obtained by mixing the pigment (A), the silanol group-containing resin (B), and the water-soluble alkali silicate compound (C) (that is, (A) to (A A coating solution containing all of C) is applied to the surface of the calcium-based inorganic substrate.

In the first coloring method of the present invention, the coating liquid containing all of (A) to (C) is preferably a pigment (A), a silanol group-containing resin (B), and a water-soluble alkali silicate compound (C). In a total amount of 100 g to 300 g per 1 m ² of the calcium-based inorganic substrate surface. The calcium-based inorganic base material provided with the coating solution is dried, and a coating film having a thickness of preferably 10 μm to 100 μm can be formed on the surface of the base material.

  On the other hand, in the second coloring method of the present invention, the first coating liquid containing the pigment (A) and the silanol group-containing resin (B) is applied to the substrate surface and dried, and then water-soluble silicic acid. A second coating solution containing the alkali compound (C) is applied. The first coating liquid and the second coating liquid are as described above.

In the second coloring method of the present invention, the first coating liquid per 1 m ² of the calcium-based inorganic substrate surface is the total amount of the pigment (A) and the silanol group-containing resin (B), preferably 100 g to 300 g. It is given to become.

  After the application of the first coating solution, the calcium-based inorganic base material is dried. The drying conditions are not particularly limited, and may vary depending on the application amount, application location, etc., but may be naturally dried for 1 hour to 1 day, for example.

  After drying, the base material to which the first coating liquid is applied is subjected to a step of applying the second coating liquid. In this step, the second coating liquid containing the water-soluble alkali silicate compound (C) is applied to the surface of the base material to which the coating liquid for coloring is applied for the purpose of preventing peeling of the colored portion and hardening the surface. Is granted.

The second coating solution is applied so that the water-soluble alkali silicate compound (C) is preferably 100 g to 300 g per 1 m ^{2 of the} substrate surface to which the first coating solution is applied.

  In the second coloring method of the present invention, a coating film of the water-soluble alkali silicate compound (C) is formed so as to cover the coating film formed from the pigment (A) and the silanol group-containing resin (B). Since it becomes a two-layer coating film, a coating film having a thickness of preferably 10 μm to 500 μm can be formed on the substrate surface.

  Furthermore, the second coating liquid may contain a silanol group-containing resin (B). The ratio of the silanol group-containing resin (B) and the water-soluble alkali silicate compound (C) is as described above.

  According to the first coloring method and the second coloring method of the present invention, the pigment (A) is incorporated into the silanol group-containing resin (B), and the reactive group of the silanol group-containing resin (B) and the concrete base material are combined. Furthermore, the silanol group-containing resin (B) is bonded to the water-soluble alkali silicate compound (C) to form a silica network in which the pigment is sealed on the substrate surface. Therefore, the colored portion is integrated with the base material despite the post-coating coloration, and peeling is prevented.

  In particular, according to the second coloring method, the water-soluble alkali silicate compound (C) is applied after the application of the first coating liquid containing the pigment (A) and the silanol group-containing resin (B), so that it is water-soluble. The alkali silicate compound (C) is bonded so as to cover the coating film formed from the pigment (A) and the silanol group-containing resin (B) to form a coating film, and hardens the colored portion. Is possible. Furthermore, when the 2nd coating liquid containing a water-soluble alkali silicate compound (C) contains silanol group containing resin (B), a very firm network is formed. Accordingly, the pigment is not liberated, and water resistance and the like are further imparted.

(Colored calcium mineral base material)
The colored calcium inorganic base material (concrete, cement, gypsum, stone, etc.) of the present invention is colored using the coloring composition. The colored calcium inorganic base material of the present invention is preferably used as an indoor concrete floor.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated, this invention is not limited to these Examples.

Example 1
A square plate-shaped concrete substrate having a side of 6 cm was prepared (FIG. 1). This concrete base material had a mass ratio of cement to sand of 1: 2, and a water cement ratio of 50%.

  Next, as a pigment (A), a mixture of a yellow pigment (particle size: 1.5 μm) and a blue pigment (particle size: 0.5 μm) (mass ratio of yellow pigment to blue pigment is 1: 1), and containing silanol groups As the resin (B), a silanol group-containing styrene-acrylic resin emulsion was mixed at a mass ratio of 2: 1 (emulsion is converted into a resin content). Water was added to the mixture of (A) and (B) and stirred to prepare a coating solution (this coating solution is referred to as coating solution 1). In addition, in the obtained coating liquid 1, (A) and (B) were contained in the ratio of 40 mass% in total.

Next, the coating liquid 1 was applied so that (A) and (B) totaled about 200 g per 1 m ^{2 of the} concrete base surface.

  After the coating liquid 1 was applied, the concrete substrate was naturally dried for 1 day to obtain a colored concrete substrate.

  As shown in FIG. 1, a number of voids (unevenness) were observed on the surface of the concrete base material before applying the coating liquid 1. However, no voids (irregularities) were observed on the surface of the concrete base material (colored concrete base material) colored with the coating liquid 1.

(Example 2)
The colored concrete substrate obtained in Example 1 was coated with a coating solution containing a sodium silicate aqueous solution as the water-soluble alkali silicate compound (C) and a silanol group-containing styrene-acrylic resin emulsion as the silanol group-containing resin (B) (this The coating solution was designated coating solution 2). The coating liquid 2 contains sodium silicate and silanol group-containing styrene-acrylic resin in a mass ratio of 2: 1. The coating liquid 2 contains sodium silicate and silanol group-containing styrene-acrylic resin. A total of 45% by mass was included.

  After the coating liquid 2 was applied, the colored concrete base material was naturally dried to obtain a colored concrete base material having a hardened colored surface (FIG. 2). As shown in FIG. 2, the colored concrete base material has a very good appearance because the void (unevenness) on the surface of the concrete base material is hidden. Furthermore, since the colored portion is hardened with an alkali silicate compound and integrated with the substrate surface, it does not peel off.

  According to the present invention, the surface of the substrate can be colored so as to hide the voids (unevenness) on the surface of the calcium-based inorganic substrate, that is, the substrate surface (underlying) is not transparent, and the calcium-based inorganic substrate An integrated coating (coloring) is possible, and a coloring composition that can harden the colored surface and prevent peeling of the colored portion can be provided. Therefore, it is useful in many fields including building materials, preferably on floors of parking lots, warehouses, factories and the like.

It is a photograph which shows the state of the concrete base-material surface before providing the composition for coloring of this invention. It is a photograph which shows the state of the concrete base material surface after providing the coloring composition of this invention.

Claims (9)

  Calcium-based inorganic base material comprising at least two pigments (A) having different particle diameters, a silanol group or a resin (B) having a group that can be converted to a silanol group, and a water-soluble alkali silicate compound (C) Coloring composition.   A first coating solution containing at least two pigments (A) having different particle diameters and a silanol group or a resin (B) having a group that can be converted into a silanol group, and a water-soluble alkali silicate compound (C); A composition for coloring a calcium-based inorganic base material, comprising a second coating liquid to be contained.   The coloring composition according to claim 2, wherein the second coating liquid further contains a resin (B) having a group that can be converted into a silanol group. A coloring kit for a calcium-based inorganic base material,
A first coating solution containing at least two pigments (A) having different particle sizes and a resin (B) having a silanol group or a group that can be converted into a silanol group; and a water-soluble alkali silicate compound (C) A second coating solution containing;
Including a kit.   The kit according to claim 4, wherein the second coating liquid further contains a resin (B) having a silanol group or a group that can be converted into a silanol group. A method for coloring a calcium-based inorganic base material,
Applying a coating solution containing at least two pigments (A) having different particle sizes, a silanol group or a resin (B) having a group that can be converted into a silanol group, and a water-soluble alkali silicate compound (C);
Including the method. A method for coloring a calcium-based inorganic base material,
A first coating solution containing at least two pigments (A) having different particle sizes and a resin (B) having a silanol group or a group that can be converted into a silanol group is applied to the calcium-based inorganic base material. A step of drying; and a step of applying a second coating solution containing a water-soluble alkali silicate compound (C) to the surface of the substrate to which the first coating solution is applied;
Including the method.   The method according to claim 7, wherein the second coating liquid further contains a resin (B) having a silanol group or a group that can be converted into a silanol group.   A colored calcium-based inorganic base material colored using the coloring composition according to any one of claims 1 to 3.

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