Hydraulic composition and manufacturing method thereof, hardened product and manufacturing method thereof, and hydraulic composition kit

Abstract

To provide a polyurethane-based hydraulic composition with little change in color tone (color blur) of a hardened material due to a change in an amount of pigment added.SOLUTION: The hydraulic composition contains an active hydrogen-containing compound having more than one active hydrogen in one molecule, a polyisocyanate compound having more than one isocyanate group in one molecule, hydraulic cement, an aqueous inorganic powder pigment, and water.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a hydraulic composition and a method for producing the same, a cured product of the hydraulic composition and a method for producing the same, and a hydraulic composition kit and a pigment package used in the production of the hydraulic composition. [Background technology]

[0002] For example, a polyurethane-based hydraulic composition that combines urethane resin and cement is known as a floor coating material. Patent Document 1 describes a method of mixing hydraulic cement, water, polyol, and a polyisocyanate compound on-site for application. According to this method, the hydration reaction between the hydraulic cement and water, the urethane reaction between the polyol and the polyisocyanate compound, and the urea reaction between the water and the polyisocyanate compound proceed simultaneously, resulting in a hardened product (floor material) that is hard and has excellent abrasion resistance, heat resistance, chemical resistance, etc. Patent Document 2 proposes a method for coloring a material that combines resin and cement. As a specific example, the method describes a method in which a colored emulsion containing water, acrylic resin, and pigment is prepared in advance, and then mixed with a cement material for application. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-169744 [Patent Document 2] Japanese Patent Application Publication No. 11-199296 Summary of the Invention [Problem to be solved by the invention]

[0004] The present inventors attempted to apply the method described in Patent Document 2 to a polyurethane-based hydraulic composition. That is, they attempted a method in which a colored emulsion containing water, polyol, and pigment was prepared in advance, and then mixed with a cement material and a polyisocyanate compound for application, and found that the color tone of the cured product fluctuated significantly (also called color variation) with the amount of pigment added. The present invention aims to provide a polyurethane-based hydraulic composition which produces a cured product with little color variation and a method for producing the same, a cured product of the hydraulic composition and a method for producing the same, and a hydraulic composition kit and a pigment package used in the production of the hydraulic composition. [Means for solving the problem]

[0005] The present invention has the following aspects. [1] A hydraulic composition comprising an active hydrogen-containing compound having more than one active hydrogen per molecule, a polyisocyanate compound having more than one isocyanate group per molecule, hydraulic cement, an aqueous inorganic powder pigment, and water. [2] The hydraulic composition of [1], wherein the aqueous inorganic powder pigment is contained in an amount of 0.5 to 20 mass % based on the total mass of the hydraulic composition. [3] The hydraulic composition according to [1] or [2], wherein the active hydrogen-containing compound is 5 to 5,000 parts by mass and the polyisocyanate compound is 10 to 200 parts by mass per 100 parts by mass of the hydraulic cement. [4] The hydraulic composition of any of [1] to [3], wherein ΔE1 and ΔE2 of the cured product determined by the following measurement method are all 0.6 or less when the content of the aqueous inorganic powder pigment is changed to a specified amount of the aqueous inorganic powder pigment, 0.75 times the specified amount of the aqueous inorganic powder pigment, and 1.5 times the specified amount of the aqueous inorganic powder pigment. [Method of measuring ΔE1 and ΔE2] (1) Hydraulic composition X, in which the content of the aqueous inorganic powder pigment is a specified amount, hydraulic composition Y, in which the content of the aqueous inorganic powder pigment is 0.75 times the specified amount, and hydraulic composition Z, in which the content of the aqueous inorganic powder pigment is 1.5 times the specified amount, were each applied to the entire surface of a white slate board (length 300 mm, width 300 mm) in an amount of 4 kg / m 2The mixture is then left for 24 hours in an atmosphere having a temperature of 23°C and a humidity of 50% RH to harden. (2) The entire surface of each cured product was divided into nine square regions measuring 100 mm in length and 100 mm in width, and the square regions at the four corners were designated regions 1 to 4, and the square region in the center was designated region 5. (3) For each of areas 1 to 5, measure the L value, a value, and b value using a color difference meter. (4) In the regions 1 to 5 of the set product of the hydraulic composition X, the L values ​​are L01 to L05, the a values ​​are a01 to a05, and the b values ​​are b01 to b05, respectively, and in the regions 1 to 5 of the set product of the hydraulic composition Y, the L values ​​are L1 to L5, the a values ​​are a1 to a5, and the b values ​​are b1 to b5, respectively, ΔE is calculated by the following formulas (1) to (4) and is defined as ΔE1. L'={(L01-L1) 2 +(L02-L2) 2 +(L03-L3) 2 +(L04-L4) 2 +(L05-L5) 2} / 5...Equation (1) a'={(a01-a1) 2 +(a02-a2) 2 +(a03-a3) 2 +(a04-a4) 2 +(a05-a5) 2} / 5...Equation (2) b'={(b01-b1) 2 +(b02-b2) 2 +(b03-b3) 2 +(b04-b4) 2 +(b05-b5) 2} / 5...Equation (3) ΔE=(L'+a'+b') 1 / 2 ...Equation (4) (5) In the regions 1 to 5 of the set product of the hydraulic composition X, the L values ​​are L01 to L05, the a values ​​are a01 to a05, and the b values ​​are b01 to b05, respectively, and in the regions 1 to 5 of the set product of the hydraulic composition Z, the L values ​​are L1 to L5, the a values ​​are a1 to a5, and the b values ​​are b1 to b5, respectively, ΔE is calculated from the formulas (1) to (4) and is designated as ΔE2. [5] A hardened product of the hydraulic composition according to any one of [1] to [4] above. [6] The hardened product of [5], which is a flooring material. [7] A method for producing a hydraulic composition, comprising mixing a first composition containing an active hydrogen-containing compound having more than one active hydrogen per molecule and water, a second composition containing a polyisocyanate compound having more than one isocyanate group per molecule, a third composition containing hydraulic cement, and an aqueous inorganic powder pigment. [8] The method for producing a hydraulic composition according to [7], further comprising mixing the first composition, the second composition and the aqueous inorganic powder pigment to prepare a premixture, and mixing the premixture with the third composition. [9] The method for producing a hydraulic composition according to [7] or [8], wherein the aqueous inorganic powder pigment is a pigment package in which the aqueous inorganic powder pigment is sealed in a water-soluble container made of a water-soluble film.

[10] A method for producing a hardened product, comprising producing a hydraulic composition by any one of the production methods [7] to [9] above, coating the obtained hydraulic composition, and hardening the composition.

[11] The method for producing the hardened product according to

[10] , comprising applying the hydraulic composition to a floor.

[12] A first container containing a first composition including an active hydrogen-containing compound having more than one active hydrogen per molecule and water; a second container containing a second composition comprising a polyisocyanate compound having more than one isocyanate group per molecule; a third container containing a third composition comprising a hydraulic cement; and A hydraulic composition kit having a fourth container containing a water-based inorganic powder pigment.

[13] The hydraulic composition kit according to

[12] , wherein the fourth container is a pigment package in which the aqueous inorganic powder pigment is enclosed in a water-soluble container made of a water-soluble film.

[14] A pigment package in which a water-based inorganic powder pigment is enclosed in a water-soluble container made of a water-soluble film. Effect of the Invention

[0006] According to the present invention, there are obtained a polyurethane-based hydraulic composition which produces a cured product with little color variation and a method for producing the same, a cured product of the hydraulic composition and a method for producing the same, and a hydraulic composition kit and a pigment package used in the production of the hydraulic composition. [Brief description of the drawings]

[0007] [Figure 1] 1 is a graph showing the measurement results in the examples, in which the horizontal axis indicates the amount of pigment added and the vertical axis indicates ΔE. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In this specification, a numerical range expressed by "to" means a numerical range in which the numerical values ​​before and after "to" are the lower and upper limits. In this specification, the number average molecular weight (hereinafter also referred to as "Mn") is the polystyrene-equivalent molecular weight obtained by measurement by gel permeation chromatography (GPC) using a calibration curve prepared using standard polystyrene samples of known molecular weight.

[0009] In this specification, the average primary particle size of the aqueous inorganic powder pigment is a volume-based median size measured with a particle size distribution analyzer using a laser diffraction method. For example, a sample diluted with water is measured using a Microtrac MT3000 (Microtrac Corporation).

[0010] In this specification, the term "water-soluble film" refers to a film whose solubility at a water temperature of 5°C and at a water temperature of 35°C is both 95 to 100%, as measured by the following measurement method. <Method for measuring dissolution rate> Using the method described below, the dissolution rate when the sample temperature t is 5°C and the water temperature T is 5°C (hereinafter also referred to as the "5°C dissolution rate") and the dissolution rate when the sample temperature t is 35°C and the water temperature T is 35°C (hereinafter also referred to as the "35°C dissolution rate") are determined. The water-soluble film to be measured is left to stand for 24 hours in an atmosphere with a temperature of 23°C and a relative humidity of 50% to prepare a sample. The sample is cut into test pieces measuring 2 cm in length and 2 cm in width, and the total mass (W0: unit: g) of the 10 test pieces is measured. The test piece and 50 mL of water at T°C are placed in a 100 mL beaker, and the mixture is stirred at 300 rpm for 10 minutes using a magnetic stirrer and a stirring bar (7 mm x 20 mm). After stirring, the mixture is filtered through a stainless steel 200 mesh filter (mass W1: unit g) whose mass has been measured in advance, and the mesh filter is dried for 1 hour at 80° C. After that, the mesh filter is left to stand for 15 hours in an atmosphere at a temperature of 23° C. and a relative humidity of 50%, after which its mass (W2: unit g) is measured and the dissolution rate is calculated by the following formula (1). Dissolution rate (unit: %) = [W0-(W2-W1)] / W0 × 100 (1)

[0011] <Hydraulic composition> The hydraulic composition of the present embodiment contains an active hydrogen-containing compound, a polyisocyanate compound, hydraulic cement, an aqueous inorganic powder pigment, and water. It may further contain other components.

[0012] [Active hydrogen-containing compounds] An active hydrogen-containing compound has more than one active hydrogen in one molecule. In this specification, the active hydrogen-containing compound does not include "water". The hydraulic composition may contain one type of active hydrogen-containing compound or two or more types. When the active hydrogen-containing compound contains one type, it has two or more active hydrogens in one molecule. When the active hydrogen-containing compound contains two or more types, the average number of active hydrogens per molecule exceeds one.

[0013] The active hydrogen-containing compound is preferably a compound having a hydroxyl group or an amino group. A primary amino group has two active hydrogens, and a secondary amino group has one active hydrogen. Examples of the active hydrogen-containing compound include alcohols, polyhydric alcohols, amines, alkanolamines, polyether monools, polyether polyols, polyester polyols, castor oil or derivatives thereof, and polybutadiene polyols.

[0014] The alcohol is preferably an alcohol having a carbon number of 1 to 6. Examples include methanol, ethanol, propyl alcohol, isopropyl alcohol, and butanol. Examples of polyhydric alcohols include ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, glycerin, trimethylolpropane, pentaerythritol, sorbitol, and sucrose. The amine is preferably an aliphatic amine, examples of which include ethylenediamine, diethylenetriamine, and triethylenetetramine. Examples of alkanolamines include monoethanolamine, N,N-dimethylaminoethanol, dimethylaminoethoxyethanol, N,N',N'-trimethyl-N-aminoethylethanolamine, diethanolamine, and triethanolamine.

[0015] The polyether monol is preferably a compound obtained by ring-opening addition of one or more alkylene oxides described below to the above alcohol as an initiator. The polyether polyol is preferably a compound obtained by ring-opening addition of one or more alkylene oxides described below to the above polyhydric alcohol or the above alkanolamine as an initiator. Examples of the alkylene oxide include ethylene oxide, propylene oxide, 1,2-butylene oxide, and 2,3-butylene oxide. As the alkylene oxide, propylene oxide or a combination of propylene oxide and ethylene oxide is preferred.

[0016] The polyester polyol is preferably a compound obtained by reacting a polycarboxylic acid with one or more of the above polyhydric alcohols. Examples of the polycarboxylic acid include succinic acid, glutaric acid, pimelic acid, adipic acid, sebacic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, phthalic acid, and terephthalic acid. Polyester diols obtained by reacting dicarboxylic acids with dihydric alcohols are more preferred.

[0017] From the viewpoint of hydrophobicity and reactivity, the active hydrogen-containing compound preferably contains one or more selected from the group consisting of castor oil, castor oil derivatives, polyether polyols, and polyester polyols, and more preferably contains either one or both of castor oil and castor oil derivatives. The Mn of the active hydrogen-containing compound is preferably from 300 to 3,000, more preferably from 400 to 2,500, and even more preferably from 500 to 2,000, from the viewpoint of flowability. The average number of active hydrogen atoms per molecule of the active hydrogen-containing compound is preferably 2 to 5.

[0018] [Polyisocyanate compounds] A polyisocyanate compound has more than one isocyanate group in one molecule. The hydraulic composition may contain one type of polyisocyanate compound or two or more types. When it contains one type of polyisocyanate compound, the polyisocyanate compound has two or more isocyanate groups in one molecule. When it contains two or more types of polyisocyanate compound, the average number of isocyanate groups per molecule exceeds one. The polyisocyanate compound is preferably a low molecular weight polyisocyanate compound or an isocyanate group-terminated urethane prepolymer.

[0019] Examples of the low molecular weight polyisocyanate compound include aliphatic diisocyanates, alicyclic diisocyanates, aromatic diisocyanates, and modified products thereof. An example of the aliphatic diisocyanate is hexamethylene diisocyanate. Examples of alicyclic diisocyanates include 4,4'-dicyclohexylmethane diisocyanate (hydrogenated MDI) and isophorone diisocyanate. Examples of aromatic diisocyanates include tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate (MDI), polyphenyl polyisocyanate (polymeric MDI), and xylylene diisocyanate. Examples of the modified product include uretidione modified product, nurate modified product, carbodiimide modified product, and biuret modified product.

[0020] The isocyanate-terminated urethane prepolymer is preferably a compound obtained by reacting the low-molecular-weight polyisocyanate compound with a polyhydric alcohol under conditions in which the isocyanate group is in excess. Examples of the polyhydric alcohol include the same polyhydric alcohols as the active hydrogen-containing compound, and among these, polyether polyols are preferred. The Mn of the isocyanate group-terminated urethane prepolymer is preferably from 500 to 10,000, and more preferably from 500 to 2,000.

[0021] As the polyisocyanate compound, from the viewpoints of reactivity and workability, the low molecular weight polyisocyanate compounds are preferred, aromatic diisocyanates or alicyclic diisocyanates are more preferred, and polymeric MDI is even more preferred.

[0022] [Hydraulic cement] Hydraulic cement hardens or sets upon mixing with water. Any known hydraulic cement can be used. Portland cement is preferred. Examples of Portland cement include ordinary Portland cement and high-early-strength Portland cement. From the viewpoints of reactivity and workability, ordinary Portland cement is preferred. White ordinary Portland cement (white cement) is more preferred because it is easy to adjust the color tone of the hardened product.

[0023] [Water-based inorganic powder pigment] Aqueous inorganic powder pigments are surface-treated pigments in which hydrophilic functional groups are introduced onto the particle surface by surface-modifying inorganic powder pigments. Aqueous inorganic powder pigments have affinity for water and can be stably dispersed in water. Aqueous inorganic powder pigments may be used alone or in combination of two or more. Examples of inorganic powder pigments include carbon black, titanium oxide, iron oxide, chromium oxide, and cobalt aluminate. Examples of the hydrophilic functional group include a carboxy group, a sulfo group, a carbonyl group, and a hydroxy group. The hydrophilic functional group may form a salt.

[0024] The surface modification treatment can be carried out by a known method, for example, a method of carrying out an oxidation treatment in a liquid phase using an oxidizing agent (e.g., hypochlorite). Alternatively, a method can be used in which the pigment is dispersed in a sulfonation reaction solvent and a sulfonating agent is used to introduce sulfonic acid groups (for example, the methods described in JP-A-8-283596, JP-A-10-110110, JP-A-10-110111, and JP-A-10-110114). The average primary particle size of the aqueous inorganic powder pigment is preferably 0.01 to 100.0 μm, more preferably 0.02 to 50.0 μm. If it is equal to or greater than the lower limit of the above range, it is easier to disperse and easier to develop a uniform color, whereas if it is equal to or less than the upper limit, it is difficult to develop color vividness. When two or more kinds of water-based inorganic powder pigments are used in combination, it is preferable that the average primary particle size of each of them is within the above range.

[0025] Commercially available aqueous inorganic powder pigments may be used, and examples thereof include STC-295 (a product name of Resinocolor Kogyo Co., Ltd.), EMF color, Riofast SF color (all of which are product names of Toyo Color Co., Ltd.), NAF color, AF color, MF color, WA color, and Cesiumsorb (all of which are product names of Dainichi Seika Chemical Co., Ltd.).

[0026] [Other ingredients] Examples of other components include aggregate, cement water reducing agent, plasticizer, antifoaming agent, and carbon dioxide gas absorbent. As the aggregate, a known inorganic aggregate or a known organic aggregate can be used. One type of aggregate may be used, or two or more types may be used in combination. Examples of inorganic aggregates include natural siliceous materials such as river sand and silica sand, ground inorganic materials such as glass, ceramics, fused alumina and silicon carbide, and hollow materials such as glass balloons and shirasu balloons. An example of the organic aggregate is crushed plastic. The aggregate may be colored with a dye or pigment.

[0027] The average particle size of the aggregate (median size based on number) is preferably 0.05 to 4 mm from the viewpoint of spreading workability. When two or more types of aggregate are used, it is preferable that the average particle size of each aggregate is within the above range. Fine glass, ceramics, and shirasu balloons with an average particle size of 0.05 mm or less may be used in combination as long as it does not impair spreading workability.

[0028] The cement water reducing agent is a component that acts as a surfactant to improve the dispersion stability by acting on the interface between hydraulic cement particles and the dispersion medium. It also contributes to improving the fluidity, workability and workability of the hydraulic composition. Known compounds can be used as cement water reducing agents, and specific examples include naphthalene sulfonate-formaldehyde condensate water reducing agents, melamine sulfonate-formaldehyde condensate water reducing agents, polycarboxylic acid water reducing agents, lignin sulfonic acid water reducing agents, polystyrene sulfonic acid water reducing agents, phenol formaldehyde condensate water reducing agents, and aniline sulfonic acid water reducing agents.

[0029] Examples of the plasticizer include dioctyl phthalate, butyl benzyl phthalate, dioctyl adipate, diisononyl phthalate, glycol benzoate, alkylsulfonic acid phenyl ester, and glycol octylate.

[0030] [Content] The amount of the aqueous inorganic powder pigment is preferably 0.5 to 20 mass%, more preferably 1 to 15 mass%, further preferably 2 to 12 mass%, and particularly preferably 4 to 10 mass%, based on the total mass of the hydraulic composition. When the amount is equal to or more than the lower limit of the above range, the coloring power and hiding power tend to be good, and when the amount is equal to or less than the upper limit, the pigment is less likely to aggregate and color unevenness is less likely to occur. The content of the active hydrogen-containing compound is preferably 5 to 5000 parts by mass, more preferably 10 to 100 parts by mass, per 100 parts by mass of hydraulic cement. When the content is equal to or more than the lower limit of the above range, a good appearance of the hardened product is easily obtained. When the content is equal to or less than the upper limit, a good strength of the hardened product is easily obtained. The content of the polyisocyanate compound is preferably 10 to 200 parts by mass, more preferably 50 to 100 parts by mass, based on 100 parts by mass of hydraulic cement. When the content is equal to or more than the lower limit of the above range, good surface hardness of the cured product is easily obtained. When the content is equal to or less than the upper limit, good fluidity of the hydraulic composition is easily obtained. The water content is preferably 5 to 500 parts by mass, more preferably 10 to 100 parts by mass, and even more preferably 10 to 50 parts by mass, relative to 100 parts by mass of hydraulic cement. When the water content is equal to or more than the lower limit of the above range, good fluidity of the hydraulic composition is easily obtained. When the water content is equal to or less than the upper limit, good appearance of the hardened product is easily obtained.

[0031] When the hydraulic composition contains aggregate, the content of the aggregate is preferably 10 to 10,000 parts by mass, more preferably 25 to 5,000 parts by mass, and even more preferably 100 to 1,000 parts by mass, relative to 100 parts by mass of hydraulic cement. When the content is equal to or more than the lower limit of the above range, the curing shrinkage suppression effect is easily obtained. When the content is equal to or less than the upper limit, good spreading workability is easily obtained. When the hydraulic composition contains a cement water-reducing agent, the content of the cement water-reducing agent is preferably 0.01 to 20 parts by mass, more preferably 0.1 to 5 parts by mass, relative to 100 parts by mass of hydraulic cement. When the content is equal to or more than the lower limit of the above range, good fluidity of the hydraulic composition is easily obtained. When the content is equal to or less than the upper limit, good appearance of the hardened product is easily obtained.

[0032] <Method for producing hydraulic composition> The hydraulic composition is obtained by mixing an active hydrogen-containing compound, a polyisocyanate compound, a hydraulic cement, an aqueous inorganic powder pigment, water, and other components as necessary. The color tone of the cured product can be adjusted by either or both of the type and the amount of the aqueous inorganic powder pigment added.

[0033] The hydraulic composition hardens by the hydration reaction between the hydraulic cement and water, the urethane reaction between the active hydrogen-containing compound and the polyisocyanate compound, and the urea reaction between the polyisocyanate compound and water. Therefore, it is preferable that at least the mixing of the hydraulic cement with water, the mixing of the active hydrogen-containing compound with the polyisocyanate compound, and the mixing of the polyisocyanate compound with water are carried out at the construction site. The active hydrogen-containing compound and water may be mixed in advance.

[0034] Preferably, a first composition containing an active hydrogen-containing compound and water, a second composition containing a polyisocyanate compound, a third composition containing hydraulic cement, and an aqueous inorganic powder pigment are prepared separately and mixed to produce a hydraulic composition. The second composition is a liquid not containing water, and the third composition and the aqueous inorganic powder pigment are powders. When the hydraulic composition contains other components, the aggregate is preferably contained in the third composition together with the hydraulic cement. The cement water-reducing agent, the plasticizer, the defoaming agent and the carbon dioxide gas absorbent are preferably contained in the first composition together with water.

[0035] Regarding the order of mixing the first to third compositions and the aqueous inorganic powder pigment, a method in which the first composition, the second composition and the aqueous inorganic powder pigment are first mixed to prepare a preliminary mixture, and then the obtained preliminary mixture is mixed with the third composition to obtain a hydraulic composition is preferred in terms of dispersibility of the pigment.

[0036] For example, the first to third compositions and the aqueous inorganic powder pigment may be prepared in the form of a hydraulic composition kit, which will be described later. The aqueous inorganic powder pigment is preferably used in the form of a pigment package described below. In the pigment package, the aqueous inorganic powder pigment is sealed in a water-soluble container made of a water-soluble film. When the pigment package is placed in a liquid containing water without being opened, the water-soluble container dissolves in the water and the aqueous inorganic powder pigment disperses in the liquid. When the pigment package is used, a predetermined amount of the aqueous inorganic powder pigment can be added at the application site without having to measure it. In addition, the reproducibility of the amount of the aqueous inorganic powder pigment added is excellent.

[0037] <Method of manufacturing the cured product> After the hydraulic composition is produced, it is applied to an object to be worked on before hardening progresses, and then allowed to stand to obtain a hardened product. The application target may be, for example, a wall or floor of a building. A known method may be applied depending on the application target. The application amount may be set depending on the thickness of the cured product to be obtained.

[0038] The hardened product of the hydraulic composition is hard and has excellent abrasion resistance, heat resistance, chemical resistance, etc., and is suitable for flooring or wall materials. For example, it is suitable for flooring or wall materials in food factories, chemical factories, machine factories, etc. It is particularly suitable for flooring. The thickness of the flooring material made of the hardened hydraulic composition is preferably set from the viewpoints of impact resistance, strength and design, and is preferably 1 to 50 mm, more preferably 2 to 20 mm.

[0039] The hydraulic composition of this embodiment is a polyurethane-based hydraulic composition containing an aqueous inorganic powder pigment, and as shown in the examples described later, a hardened product with little color variation (color blur) due to changes in the amount of pigment added can be obtained. Therefore, even if the amount of pigment added varies at the construction site, the aesthetic appearance can be maintained at a constant level.

[0040] Specifically, when the content of the aqueous inorganic powder pigment is changed to a specified amount, 0.75 times the specified amount, and 1.5 times the specified amount, a hydraulic composition can be realized in which ΔE1 and ΔE2 of the cured product measured by the following measurement method are small. The smaller ΔE1 and ΔE2 mean that the color tone fluctuation (color blur) caused by the change in the amount of pigment added is smaller. The specified amount of pigment is the amount of pigment added that is set to approximate the 2019 K edition standard paint color published by the Japan Paint Manufacturers Association. For example, by adding 10 parts by mass of commercially available Resinocolor Kogyo's product name "STC-295" to 100 parts by mass of hydraulic cement, a color (green) similar to color chart number K39-40L can be achieved. In addition, when using commercially available Ishihara Sangyo Kaisha's product name "Typaque R-830" and Titan Kogyo's product name "TAROX YM-1100", a color (yellow) similar to color chart number K19-60T can be achieved by adding 2.12 parts by mass of Typaque R-830 ​​and 7.88 parts by mass of TAROX YM-1100 to 100 parts by mass of hydraulic cement. When using commercially available Lanxess's product name "Bayferrox 110", a color (red) similar to color chart number K07-30L can be achieved by adding 10 parts by mass of Bayferrox 110 to 100 parts by mass of hydraulic cement. When using commercially available products such as Ishihara Sangyo Kaisha's "Typeque R-830," Titan Kogyo's "TAROX YM-1100," or LANXESS's "Chromium Oxide GN," a color (light green) close to the color chart number K37-50L can be achieved by adding 3.0 parts by weight of Typeque R-830, 0.87 parts by weight of TAROX YM-1100, and 6.13 parts by weight of chromium oxide GN to 100 parts by weight of hydraulic cement. When using commercially available products such as Ishihara Sangyo Kaisha's "Typeque R-830", Titan Kogyo's "TaroX YM-1100", and LANXESS's "Bayferrox 318", it is possible to achieve a color (beige) close to the color chart number K19-70L by adding 7.5 parts by mass of Typeque R-830, 2.45 parts by mass of TaroX YM-1100, and 0.05 parts by mass of Bayferrox 318 to 100 parts by mass of hydraulic cement. When using commercially available products such as Ishihara Sangyo Co., Ltd.'s product name "Typeque R-830," Titan Kogyo Co., Ltd.'s product name "TAROX YM-1100," and Asahi Sangyo Co., Ltd.'s product name "Black 6350," a color (gray) close to color chart number K25-50B can be achieved by adding 7.1 parts by mass of Typeque R-830, 0.3 parts by mass of TAROX YM-1100, and 2.6 parts by mass of Black 6350 to 100 parts by mass of hydraulic cement. In the hydraulic composition of this embodiment, the amount of addition that results in a color similar to that of color chart number K39-40L is set to a specified amount. The color similar to that of color chart number K39-40L means that the absolute value ΔE of the difference between the L, a, and b values ​​from K39-40L is 0 to 20. From the viewpoint of excellent suppression of color blurring, it is preferable that ΔE1 and ΔE2 are both 0.6 or less, and more preferably 0.4 or less.

[0041] [Method of measuring ΔE1 and ΔE2] (1) Hydraulic composition X, in which the content of the aqueous inorganic powder pigment is a specified amount, hydraulic composition Y, in which the content of the aqueous inorganic powder pigment is 0.75 times the specified amount, and hydraulic composition Z, in which the content of the aqueous inorganic powder pigment is 1.5 times the specified amount, were each applied to the entire surface of a white slate board (length 300 mm, width 300 mm) in an amount of 4 kg / m 2 The mixture is then left for 24 hours in an atmosphere having a temperature of 23°C and a humidity of 50% RH to harden. (2) The entire surface of each cured product was divided into nine square regions measuring 100 mm in length and 100 mm in width, and the square regions at the four corners were designated regions 1 to 4, and the square region in the center was designated region 5. (3) For each of areas 1 to 5, measure the L value, a value, and b value using a color difference meter. (4) In the regions 1 to 5 of the set product of the hydraulic composition X, the L values ​​are L01 to L05, the a values ​​are a01 to a05, and the b values ​​are b01 to b05, respectively, and in the regions 1 to 5 of the set product of the hydraulic composition Y, the L values ​​are L1 to L5, the a values ​​are a1 to a5, and the b values ​​are b1 to b5, respectively, ΔE is calculated by the following formulas (1) to (4) and is defined as ΔE1. L'={(L01-L1) 2 +(L02-L2) 2 +(L03-L3) 2 +(L04-L4) 2 +(L05-L5) 2} / 5...Equation (1) a'={(a01-a1) 2 +(a02-a2) 2 +(a03-a3) 2 +(a04-a4) 2 +(a05-a5) 2} / 5...Equation (2) b'={(b01-b1) 2 +(b02-b2) 2 +(b03-b3) 2 +(b04-b4) 2 +(b05-b5) 2} / 5...Equation (3) ΔE=(L'+a'+b') 1 / 2 ...Equation (4) (5) In the regions 1 to 5 of the set product of the hydraulic composition X, the L values ​​are L01 to L05, the a values ​​are a01 to a05, and the b values ​​are b01 to b05, respectively, and in the regions 1 to 5 of the set product of the hydraulic composition Z, the L values ​​are L1 to L5, the a values ​​are a1 to a5, and the b values ​​are b1 to b5, respectively, ΔE is calculated from the formulas (1) to (4) and is designated as ΔE2.

[0042] <Hydraulic composition kit> The hydraulic composition kit of this embodiment has a first container containing the first composition, a second container containing the second composition, a third container containing the third composition, and a fourth container containing the aqueous inorganic powder pigment. It is preferable to design the hydraulic composition so that a desired composition can be obtained by mixing all the components in each container, since this allows each component to be added at the construction site without measuring it, and also provides excellent reproducibility in the amount of each component to be added.

[0043] The containers used for the first container and the second container may be any container that can hold and seal a liquid. An example of such a container is a bag-shaped container made of a plastic film. The shape of the container is not particularly limited. For example, the container may be a standing pouch shape that can stand on its own when filled with liquid. The container used for the third container may be any container that can contain powder and has moisture-proof properties, such as a kraft paper bag for cement. The container used for the fourth container may be any container that can hold and seal a liquid. The container itself may be water-soluble. Examples include a bag-shaped container made of a plastic film and a water-soluble container made of a water-soluble film described below. It is preferable to use a pigment package described below as the fourth container.

[0044] <Pigment packaging> The pigment package of the present embodiment has a water-soluble container made of a water-soluble film, and a water-based inorganic powder pigment sealed in the water-soluble container.

[0045] [Water-soluble film] The water-soluble film constituting the water-soluble container may be any water-soluble film having the strength and physical stability required for a packaging material, and may be appropriately selected from known water-soluble films. The water-soluble film contains one or more water-soluble polymers and may further contain optional additives.

[0046] The water-soluble polymer may be any of a natural polymer, a semi-synthetic polymer, and a synthetic polymer. Examples of synthetic polymers include polyvinyl alcohol, modified polyvinyl alcohol, polyvinyl acetal, modified polyvinyl acetal, polyvinylpyrrolidone, polyvinyl methyl ether, polyacrylamide, polyisopropylacrylamide, polyacrylic acid, sodium polyacrylate, polymethacrylic acid, sodium polymethacrylate, and polyethylene oxide. Examples of semi-synthetic polymers include methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose. Examples of natural polymers include guar gum, carrageenan, alginic acid, starch, starch derivatives, dextrin, xanthan gum, pullulan, chitosan, and gelatin.

[0047] The water-soluble polymer is not limited to the above-mentioned compounds, and any compound known as a water-soluble polymer constituting a water-soluble film can be used. For example, a polymer compound exemplified as a water-soluble resin in paragraph 0011 of JP 2018-31015 A can be used. Examples of additives contained in the water-soluble film include the plasticizers and surfactants exemplified in paragraph 0021 of JP 2020-12117 A.

[0048] The thickness of the water-soluble film can be set according to the material from the viewpoints of the strength and water solubility of the film, and is preferably, for example, 1 to 100 μm, and more preferably 10 to 70 μm.

[0049] The pigment package can be produced, for example, by a method in which a predetermined amount of the water-based inorganic powder pigment is held between two water-soluble films, and the water-soluble films surrounding the water-based inorganic powder pigment are bonded together to seal the pigment. The water-soluble films can be bonded together, for example, by a heat sealing method. EXAMPLES

[0050] The present invention will be described in more detail below using examples, but the present invention is not limited to these examples.

[0051] <Evaluation method> [Measuring methods for L value, a value, b value, and ΔE] The entire surface of the cured product (300 mm long, 300 mm wide) obtained in each example was divided into nine square regions, each 100 mm long and 100 mm wide, and the L value, a value, and b value were measured for each of the four corner square regions (regions 1 to 4) and the central square region (region 5) using a color difference meter (MINOLTA product name: SPECTROPHOTOMETER CM-2600d). The measurement targets for the L value, a value, and b value were the central circular regions (diameter 8 mm) of each of regions 1 to 5. When the amount of pigment added is 1.0 times the specified amount, the L values ​​are L01 to L05, the a values ​​are a01 to a05, and the b values ​​are b01 to b05 for regions 1 to 5, and when the amount of pigment added is not the specified amount, the L values ​​are L1 to L5, the a values ​​are a1 to a5, and the b values ​​are b1 to b5 for regions 1 to 5, and ΔE was calculated using the following formulas (1) to (4). The smaller ΔE means that the difference between the color tone when the amount of pigment added is the specified amount and the color tone when the amount of pigment added is not the specified amount is smaller. L'={(L01-L1) 2 +(L02-L2) 2 +(L03-L3) 2 +(L04-L4) 2 +(L05-L5)2} / 5...Equation (1) a'={(a01-a1) 2 +(a02-a2) 2 +(a03-a3) 2 +(a04-a4) 2 +(a05-a5) 2} / 5...Equation (2) b'={(b01-b1) 2 +(b02-b2) 2 +(b03-b3) 2 +(b04-b4) 2 +(b05-b5) 2} / 5...Equation (3) ΔE=(L'+a'+b') 1 / 2 ...Equation (4)

[0052] [Appearance evaluation method] The surface gloss of the cured product obtained in each example was measured using a gloss meter (Suga Test Instruments Co., Ltd., product number: HG-268, measurement angle: 60 degrees). Measurement values ​​of 80 or more were rated as "good", and values ​​less than 80 were rated as "poor".

[0053] The raw materials used in the following examples are as follows: Active hydrogen-containing compound 1: Castor oil, Mn approximately 840, average number of active hydrogens per molecule 2.7. Polyisocyanate compound 1: Polyphenyl polyisocyanate (polymeric MDI), Mn approximately 630. Hydraulic cement 1: White Portland cement (white cement). Water-based inorganic powder pigment 1: Resinocolor Kogyo Co., Ltd. product name "STC-295", chromium oxide pigment with a hydrophilic surface treatment, average primary particle size 0.3 μm, specified amount 10 parts by mass per 100 parts by mass of hydraulic cement. Comparative pigment 1: LANXESS product name "COLORTHERM Green GN" (chromium oxide green, primary particle size 0.3 μm, inorganic powder pigment with surface not hydrophilized), specified amount is 10 parts by mass per 100 parts by mass of hydraulic cement. Plasticizer 1: Butyl benzyl phthalate (anhydrous). Water reducer 1: Polycarboxylic acid-based water reducer (aqueous solution with 30% solids by mass). Defoamer 1: Polysiloxane-based defoamer (solid content 100% by mass).

[0054] The following Examples 1-1 to 1-5 and 4 to 6 are working examples, and Examples 2-1 to 2-5 and Examples 3-1 to 3-5 are comparative examples.

[0055] [Example 1-1] In this example, the amount of the water-based inorganic powder pigment 1 added was set to a specified amount (10 parts by mass per 100 parts by mass of hydraulic cement). According to the formulation shown in Table 1, 1 active hydrogen-containing compound, 1 plasticizer, 1 water-reducing agent, 1 defoaming agent and water (additive water) were mixed with stirring to prepare a first composition. As a second composition, a polyisocyanate compound 1 was prepared. As a third composition, hydraulic cement 1 was prepared. 66 parts by mass of the first composition, 66 parts by mass of polyisocyanate compound 1, and 10 parts by mass of aqueous inorganic powder pigment 1 were added to 100 parts by mass of hydraulic cement 1, and the mixture was stirred and mixed using a stirring device (PRIMIX Corporation, product name: Labo-lution) at a rotation speed of 2500 rpm for a stirring time of 1 minute to obtain a hydraulic composition. The obtained hydraulic composition was applied to the entire surface of a white slate board (length 300 mm, width 300 mm) in an amount of 4 kg / m 2 The mixture was left to stand for 24 hours in an atmosphere having a temperature of 23° C. and a humidity of 50% RH to obtain a cured product. Using the above method, the L values ​​(L01 to L05), a values ​​(a01 to a05), and b values ​​(b01 to b05) were measured for five locations (areas 1 to 5) of the cured product. The results are shown in Table 4. The appearance of the cured product was evaluated by the method described above, and the results are shown in Table 4.

[0056] [Examples 1-2 to 1-5] Cured products were produced in the same manner as in Example 1-1, except that the amount of the aqueous inorganic powder pigment 1 added in Example 1-1 was changed as follows. The formulations of Examples 1-2 to 1-5 are shown in Table 1. Example 1-2: 5 parts by weight (0.5 times that of Example 1-1) Example 1-3: 7.5 parts by weight (0.75 times that of Example 1-1) Example 1-4: 12.5 parts by weight (1.25 times that of Example 1-1) Example 1-5: 15 parts by weight (1.5 times that of Example 1-1) In each example, the L values ​​(L1 to L5), a values ​​(a1 to a5), and b values ​​(b1 to b5) were measured at five locations (areas 1 to 5) of the cured product using the method described above, and ΔE was calculated. The results are shown in Table 4.

[0057] [Example 2-1] In Example 1-1, a pigment dispersion containing comparative pigment 1 was used instead of the aqueous inorganic powder pigment 1. The formulation of Example 2-1 is shown in Table 2. The pigment dispersion containing comparative pigment 1 was prepared by adding comparative pigment 1 to be mixed with a part of plasticizer 1 to be mixed with the first composition to a concentration of 50 mass %, and adding an unsaturated polycarboxylic acid dispersant (Kyoeisha Chemical Co., Ltd. product name "Floren G-100SF") to a concentration of 0.5 mass %, and mixing them. Note that the composition in Table 2 does not include a dispersant. In this example, a first composition was prepared by stirring and mixing active hydrogen-containing compound 1, plasticizer 1 (including the dispersion medium of the pigment dispersion), water-reducing agent 1, defoamer 1, comparative pigment 1 (pigment in the pigment dispersion), and water (additive water) to obtain the formulation shown in Table 2. 100 parts by mass of hydraulic cement 1 was added to 76 parts by mass of the first composition and 66 parts by mass of polyisocyanate compound 1, and the mixture was stirred and mixed under the same conditions as in Example 1-1 to obtain a hydraulic composition. A cured product was produced and evaluated in the same manner as in Example 1-1. The results are shown in Table 5.

[0058] As an index of the difference in color tone between the cured product obtained in Example 1-1 and the cured product obtained in Example 2-1, ΔE3 was determined by the following method and was found to be 2.64. The L values ​​of regions 1 to 5 of the cured material obtained in Example 1-1 were designated L01 to L05, the a values ​​were designated a01 to a05, and the b values ​​were designated b01 to b05, and the L values ​​of regions 1 to 5 of the cured material obtained in Example 2-1 were designated L1 to L5, the a values ​​were designated a1 to a5, and the b values ​​were designated b1 to b5, and ΔE was calculated using the above formulas (1) to (4) and designated as ΔE3. A smaller ΔE3 indicates a smaller difference in color tone.

[0059] [Examples 2-2 to 2-5] Cured products were produced and evaluated in the same manner as in Example 2-1, except that the amount of Comparative Pigment 1 added in Example 2-1 was changed as follows. The formulations of Examples 2-2 to 2-5 are shown in Table 2. Example 2-2: 5 parts by weight (0.5 times that of Example 2-1) Example 2-3: 7.5 parts by weight (0.75 times that of Example 2-1) Example 2-4: 12.5 parts by weight (1.25 times that of Example 2-1) Example 2-5: 15 parts by weight (1.5 times that of Example 2-1) In each example, the L values ​​(L1 to L5), a values ​​(a1 to a5), and b values ​​(b1 to b5) were measured at five locations (areas 1 to 5) of the cured product using the method described above, and ΔE was calculated. The results are shown in Table 5.

[0060] [Example 3-1] A cured product was produced and evaluated in the same manner as in Example 1-1, except that Comparative Pigment 1 was used in powder form instead of Water-Based Inorganic Powder Pigment 1. The formulation of Example 3-1 is shown in Table 3. The evaluation results are shown in Table 6.

[0061] As an index of the difference in color tone between the cured product obtained in Example 1-1 and the cured product obtained in Example 3-1, ΔE4 was determined by the following method and was found to be 1.11. The L values ​​of regions 1 to 5 of the cured material obtained in Example 1-1 were designated L01 to L05, the a values ​​were designated a01 to a05, and the b values ​​were designated b01 to b05, and the L values ​​of regions 1 to 5 of the cured material obtained in Example 3-1 were designated L1 to L5, the a values ​​were designated a1 to a5, and the b values ​​were designated b1 to b5, and ΔE was calculated using the above formulas (1) to (4) and designated as ΔE4. A smaller ΔE4 indicates a smaller difference in color tone.

[0062] [Examples 3-2 to 3-5] Cured products were produced and evaluated in the same manner as in Example 3-1, except that the amount of Comparative Pigment 1 added in Example 3-1 was changed as follows: The formulations of Examples 2-2 to 2-5 are shown in Table 2. Example 3-2: 5 parts by weight (0.5 times that of Example 3-1) Example 3-3: 7.5 parts by weight (0.75 times that of Example 3-1) Example 3-4: 12.5 parts by weight (1.25 times that of Example 3-1) Example 3-5: 15 parts by weight (1.5 times that of Example 3-1) In each example, the L values ​​(L1 to L5), a values ​​(a1 to a5), and b values ​​(b1 to b5) were measured at five locations (areas 1 to 5) of the cured product using the method described above, and ΔE was calculated. The results are shown in Table 6.

[0063] Figure 1 is a graph showing the measurement results for each of the above examples. The horizontal axis shows the amount of pigment added (unit: parts by mass), and the vertical axis shows ΔE, where ΔE is set to 0 when the amount of pigment added is 10 parts by mass (prescribed amount).

[0064] [Table 1]

[0065] [Table 2]

[0066] [Table 3]

[0067] [Table 4]

[0068] [Table 5]

[0069] [Table 6]

[0070] As shown in the results of Tables 4 to 6 and FIG. 1, the hydraulic compositions of Examples 1-1 to 1-5 using the aqueous inorganic powder pigment 1 showed reduced color tone fluctuation (color blur) of the cured product due to changes in the amount of pigment added, compared to Examples 2-1 to 2-5 or Examples 3-1 to 3-5.

[0071] [Example 4: Pigment packaging manufacturing example] The water-soluble film used was Kuraray Poval Film VF-H (a product name of Kuraray Co., Ltd., a film containing polyvinyl alcohol as a water-soluble polymer, having a thickness of 35 μm, and having a solubility of 100% at 5° C. and 100% at 35° C.). 10 g of the water-based inorganic powder pigment 1 (STC-295) was sandwiched between two sheets of the water-soluble film (5 cm x 5 cm), and the four sides of the water-soluble film were heat sealed to prepare a pigment package.

[0072] [Example 5: Manufacturing example of hydraulic composition kit] In this example, 6.0 kg of hydraulic cement 1 was used as 100 parts by mass. The first and second containers were stand-up pouch containers made of PET film. The third container was a cement craft paper bag. According to the formulation shown in Example 1-1 of Table 1, 1 unit of active hydrogen-containing compound, 1 unit of plasticizer, 1 unit of water-reducing agent, 1 unit of defoaming agent and water were mixed with stirring to prepare 4.0 kg (66 parts by mass) of a first composition, which was then placed in the standing pouch container to form a first container. A second composition consisting of 4.0 kg (66 parts by mass) of polyisocyanate compound 1 was placed in the standing pouch container to form a second container. A third composition consisting of 6.0 kg (100 parts by mass) of hydraulic cement 1 was placed in a cement craft paper bag to form a third container. Using the method of Example 4, 60 pigment packages each containing 10 g of 0.6 kg (10 parts by mass) of the water-based inorganic powder pigment 1 were manufactured as the fourth container. The first container, the second container, the third container and the fourth container were combined to form a hydraulic composition kit.

[0073] [Example 6: Production of hardened product using hydraulic composition kit] The hydraulic composition kit obtained in Example 5 was used to produce a set product. The entire contents of the first container and the entire contents of the second container were poured into a mixing container, and then 60 pigment packages (the fourth container) were poured in without being opened. A preliminary mixture was prepared by mixing using a stirring device (RYOBI product name: Power Mixer PMT-1362A) at a rotation speed of 1300 rpm for a stirring time of 1 minute. The entire content of the third container was added to the obtained preliminary mixture, and the mixture was mixed using the above-mentioned stirring device at a rotation speed of 1300 rpm for a stirring time of 2 minutes to obtain a hydraulic composition. The obtained hydraulic composition was applied to a concrete floor surface in an amount of 6 kg / m 2 The mixture was left to stand for 24 hours in an atmosphere having a temperature of 23° C. and a humidity of 50% RH to obtain a cured product (flooring material).

Claims

1. A hydraulic composition comprising an active hydrogen-containing compound having more than one active hydrogen per molecule, a polyisocyanate compound having more than one isocyanate group per molecule, hydraulic cement, an aqueous inorganic powder pigment which is a surface-treated pigment having hydrophilic functional groups introduced on the particle surfaces, and water.

2. The hydraulic composition according to claim 1, wherein the aqueous inorganic powder pigment is present in an amount of 0.5 to 20% by mass based on the total mass of the hydraulic composition.

3. 3. The hydraulic composition according to claim 1, wherein the active hydrogen-containing compound is 5 to 5,000 parts by mass and the polyisocyanate compound is 10 to 200 parts by mass relative to 100 parts by mass of the hydraulic cement.

4. The hydraulic composition according to any one of claims 1 to 3, wherein ΔE1 and ΔE2 of the cured product determined by the following measurement method are all 0.6 or less when the content of the aqueous inorganic powder pigment is changed to a specified amount of the aqueous inorganic powder pigment, 0.75 times the specified amount of the aqueous inorganic powder pigment, and 1.5 times the specified amount of the aqueous inorganic powder pigment. [Method for measuring ΔE1 and ΔE2] (1) Hydraulic composition X, in which the content of the aqueous inorganic powder pigment is a specified amount, hydraulic composition Y, in which the content of the aqueous inorganic powder pigment is 0.75 times the specified amount, and hydraulic composition Z, in which the content of the aqueous inorganic powder pigment is 1.5 times the specified amount, were each applied to the entire surface of a white slate board (length 300 mm, width 300 mm) in an amount of 4 kg / m ２ The mixture is then left to stand for 24 hours in an atmosphere having a temperature of 23° C. and a humidity of 50% RH to obtain a cured product. (2) The entire surface of each cured product was divided into nine square regions measuring 100 mm in length and 100 mm in width. The four corner square regions were designated regions 1 to 4, and the central square region was designated region 5. (3) For each of areas 1 to 5, the L value, a value, and b value are measured using a color difference meter. (4) In the regions 1 to 5 of the set product of the hydraulic composition X, the L values ​​are L01 to L05, the a values ​​are a01 to a05, and the b values ​​are b01 to b05, respectively, and in the regions 1 to 5 of the set product of the hydraulic composition Y, the L values ​​are L1 to L5, the a values ​​are a1 to a5, and the b values ​​are b1 to b5, respectively, ΔE is calculated from the following formulas (1) to (4) and is defined as ΔE1. L' = {(L01 - L1) ２ + (L02 - L2) ２ + (L03 - L3) ２ + (L04 - L4) ２ + (L05 - L5) ２} / 5... Equation (1) a' = {(a01 - a1) ２ + (a02 - a2) ２ + (a03 - a3) ２ + (a04 - a4) ２ + (a05 - a5) ２} / 5... Equation (2) b' = {(b01 - b1) ２ + (b02 - b2) ２ + (b03 - b3) ２ + (b04 - b4) ２ + (b05 - b5) ２} / 5... Equation (3) ΔE = (L' + a' + b') １／２ ... Equation (4) (5) In the regions 1 to 5 of the set product of the hydraulic composition X, the L values ​​are L01 to L05, the a values ​​are a01 to a05, and the b values ​​are b01 to b05, respectively, and in the regions 1 to 5 of the set product of the hydraulic composition Z, the L values ​​are L1 to L5, the a values ​​are a1 to a5, and the b values ​​are b1 to b5, respectively, ΔE is calculated from the formulas (1) to (4) and is defined as ΔE2.

5. A hardened product of the hydraulic composition according to any one of claims 1 to 4.

6. The cured product according to claim 5 , which is a flooring material.

7. A method for producing a hydraulic composition comprising mixing a first composition containing an active hydrogen-containing compound having more than one active hydrogen per molecule and water, a second composition containing a polyisocyanate compound having more than one isocyanate group per molecule, a third composition containing hydraulic cement, and an aqueous inorganic powder pigment which is a surface-treated pigment having hydrophilic functional groups introduced on the particle surfaces.

8. 8. The method for producing a hydraulic composition according to claim 7, further comprising the steps of: mixing the first composition, the second composition, and the aqueous inorganic powder pigment to prepare a premixture; and mixing the obtained premixture with the third composition.

9. The method for producing a hydraulic composition according to claim 7 or 8, wherein a pigment package in which the aqueous inorganic powder pigment is sealed in a water-soluble container made of a water-soluble film is used as the aqueous inorganic powder pigment.

10. A method for producing a hardened product, comprising producing a hydraulic composition by the method according to any one of claims 7 to 9, coating the obtained hydraulic composition, and hardening the composition.

11. The method for producing a hardened product according to claim 10, wherein the hydraulic composition is applied to a floor.

12. a first container containing a first composition including an active hydrogen-containing compound having more than one active hydrogen per molecule and water; a second container containing a second composition comprising a polyisocyanate compound having more than one isocyanate group per molecule; a third container containing a third composition comprising a hydraulic cement; and A hydraulic composition kit having a fourth container containing an aqueous inorganic powder pigment which is a surface-treated pigment having hydrophilic functional groups introduced onto the particle surfaces.

13. The hydraulic composition kit according to claim 12, wherein the fourth container is a pigment package in which the water-based inorganic powder pigment is sealed in a water-soluble container made of a water-soluble film.

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