Use of hydraulic composition foaming agent for hydraulic composition

Abstract

The present invention provides a use of a hydraulic composition foaming agent for a hydraulic composition, the hydraulic composition foaming agent being capable of being easily removed by washing when the foaming agent adheres to equipment for producing a bubble-containing hydraulic composition. Provided is a use of a hydraulic composition foaming agent for a hydraulic composition, the hydraulic composition foaming agent containing at least one surfactant (A) which is selected from anionic, cationic, and amphoteric surfactants that have a hydrocarbon group containing 8-30 carbon atoms, a non-ionic compound (B) which has LogP of 0-7.0, and an organic compound (C) which has LogP of not less than -5.0 but less than 0. In the hydraulic composition foaming agent, the content of the component (A) is 10-50 mass%, the content of the component (B) is 1-10 mass%, and the content of the component (C) is 1-20 mass%.

Description

Use of a foaming agent for a hydraulic composition in the hydraulic composition

[0001] The present invention relates to a foaming agent for a hydraulic composition, use of the foaming agent in the hydraulic composition, and a bubble-containing hydraulic composition.

[0002] Background Art In hardened bodies of bubble-containing hydraulic compositions using cement or gypsum as a hardening agent, further weight reduction is required from the viewpoints of environmental (CO ２ ) reduction effects and costs in production, transportation, and raw material procurement. In order to increase the amount of air in the hydraulic composition and introduce bubbles into the hydraulic composition, it is known to blend a surfactant.

[0003] International Publication No. 2023 / 18047 (Patent Document 1) discloses a bubble-containing gypsum slurry containing a hydraulic powder containing gypsum, water, (A1) alkyl or alkenyl sulfate ester or a salt thereof, optionally (A2) one or more surfactants other than component (A1), and (B) a nonionic compound with a LogP of 0 to 3.0, wherein the mass ratio (B) / [(A1) + (A2)] of the content of component (B) to the total content of components (A1) and (A2) is 0.05 to 0.5. Japanese Patent Publication No. 2021-32053 (Patent Document 2) discloses a foaming agent composition for construction work containing (A) an alkyl ether sulfate ester salt having a hydrocarbon group having 12 to 24 carbon atoms, (B) an alcohol having 12 or more carbon atoms, and (C) one or more components selected from an anionic surfactant having a hydrocarbon group having 11 or fewer carbon atoms, a fatty acid or salt thereof having 11 or fewer carbon atoms, an alcohol having 11 or fewer carbon atoms, and a water-soluble nonionic surfactant, wherein the proportion of (A) in the total anionic surfactant in the composition is 70% by mass or more, and the mass ratio of the content of component (A) to the content of component (C), (C) / (A), is 0.1 or more and 5 or less. Japanese Patent Publication No. 2023-70662 (Patent Document 3) discloses a foaming agent composition for hydraulic compositions, which contains (A1): one or more selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group having 8 to 10 carbon atoms, and salts thereof; (A2): one or more selected from surfactants other than component (A1); and (B): a monohydric alcohol having 6 to 10 carbon atoms, wherein the mass ratio (A1) / [(A1)+(A2)] of the content of component (A1) to the total content of components (A1) and (A2) is 0.8 or more and 1 or less.

[0004] Summary of the Invention The foaming agents disclosed in Patent Documents 1 to 3 contain a monohydric alcohol having a predetermined number of carbon atoms. However, foaming agents containing this alcohol are poorly soluble in water, and when the equipment (pipes, storage tanks, etc.) in which the foaming agent comes into contact is washed with water, the foaming agent may not be completely removed and may remain inside the equipment. When the foaming agent solidifies inside the equipment used to prepare hydraulic compositions, hydraulic substances adhere to and accumulate there, causing problems such as blockages in pipes and accumulation of dirt in storage tanks.

[0005] The present invention provides a foaming agent for hydraulic compositions that can be easily washed away (preferably by washing with water without applying external physical pressure) if it adheres to the equipment used to manufacture the air bubble-containing hydraulic composition (hereinafter also referred to as "cleanability").

[0006] The present invention relates to the use of a foaming agent for hydraulic compositions in a hydraulic composition, wherein in one embodiment, the foaming agent contains (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having a hydrocarbon group having 8 to 30 carbon atoms [hereinafter referred to as component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter referred to as component (B)], and (C) an organic compound with a LogP of -5.0 or more and less than 0 [hereinafter referred to as component (C)], wherein the foaming agent for hydraulic compositions contains 10% to 50% by mass of component (A), 1% to 10% by mass of component (B), and 1% to 20% by mass of component (C).

[0007] In another embodiment, the present invention provides a bubble-containing hydraulic composition containing a hydraulic powder, water, (A) one or more anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter referred to as (A) component], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter referred to as (B) component], and (C) an organic compound with a LogP of -5.0 or more and less than 0 [hereinafter referred to as (C) component]. The present invention relates to a bubble-containing hydraulic composition in which, per 100 parts by mass of hydraulic powder, the content of component (A) is 0.000005 parts by mass or more and 0.2 parts by mass or less, per 100 parts by mass of hydraulic powder, the content of component (B) is 0.0000005 parts by mass or more and 0.06 parts by mass or less, per 100 parts by mass of hydraulic powder, and the content of component (C) is 0.0000005 parts by mass or more and 0.06 parts by mass or less, per 100 parts by mass of hydraulic powder.

[0008] Furthermore, in another embodiment of the present invention, the present invention provides a step (i) of preparing a hydraulic composition by mixing a foaming agent for a hydraulic composition, which is obtained by mixing (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter referred to as component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter referred to as component (B)], and (C) an organic compound with a LogP of -5.0 to less than 0 [hereinafter referred to as component (C)], hydraulic powder, and water in a mixing tank, and the hydraulic composition of batch 1 The present invention relates to a method for producing a hydraulic composition, comprising the steps of (ii) discharging the composition from a mixing tank, (iii) rinsing the inside of the mixing tank with water after the discharge, and (iv) adding the foaming agent for the hydraulic composition, hydraulic powder, and water to the mixing tank after the previous step and mixing them to prepare batch 2 of the hydraulic composition, wherein the foaming agent for the hydraulic composition is a mixture of component (A) in an amount of 10% to 50% by mass, component (B) in an amount of 1% to 10% by mass, and component (C) in an amount of 1% to 20% by mass.

[0009] According to the foaming agent for hydraulic compositions of the present invention, the foaming agent adhering to pipes and storage tanks in equipment for manufacturing hydraulic compositions can be easily cleaned and removed. Furthermore, according to the foaming agent for hydraulic compositions of the present invention, the foaming agent adhering to pipes and storage tanks, as well as the bubble-containing hydraulic composition containing the foaming agent, can be easily cleaned and removed in equipment for manufacturing hydraulic compositions, and the specific gravity of the bubble-containing hydraulic composition containing the foaming agent can be reduced.

[0010] The reason why the foaming agent for hydraulic compositions of the present invention (hereinafter also referred to as the foaming agent of the present invention) and the foam-containing hydraulic compositions exhibit excellent cleaning properties for pipes and storage tanks used to manufacture hydraulic compositions is not entirely clear, but it is presumed to be as follows: A nonionic compound with a LogP value of 0 or more (component (B)) and a surfactant (component (A)) may form a hydrophobic composite with low fluidity by adsorption and interaction with hydraulic substances. By using component (B) and component (C) of the present invention in combination, a specific organic compound, which is component (C) of the present invention, actively distributes to the aforementioned hydrophobic composite, improving the fluidity and water solubility of the hydrophobic composite, and the foaming agent of the present invention and the hydraulic compositions containing the foaming agent of the present invention exhibit excellent cleaning properties by water washing. However, the present invention is not limited to the above mechanism of action.

[0011] [Foaming agent for hydraulic compositions] The foaming agent for hydraulic compositions of the present invention (hereinafter also simply referred to as "foaming agent") contains, in one embodiment, component (A), component (B), and component (C), wherein the content of component (A) in the foaming agent is 10% by mass or more and 50% by mass or less, the content of component (B) is 1% by mass or more and 10% by mass or less, and the content of component (C) is 1% by mass or more and 20% by mass or less. That is, in another embodiment, the present invention relates to the use of a foaming agent for hydraulic compositions containing component (A), component (B), and component (C) in a hydraulic composition, wherein the content of component (A) in the foaming agent is 10% by mass or more and 50% by mass or less, the content of component (B) is 1% by mass or more and 10% by mass or less, and the content of component (C) is 1% by mass or more and 20% by mass or less, and the foaming agent for hydraulic compositions may be used in a hydraulic composition.

[0012] <Component (A)> The foaming agent for hydraulic compositions of the present invention may contain, as component (A), one or more surfactants selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having a hydrocarbon group with 8 to 30 carbon atoms.

[0013] Specific examples of anionic surfactants having a hydrocarbon group with 8 to 30 carbon atoms include one or more selected from sulfate ester salts, sulfonates, and carboxylates, each having a hydrocarbon group with 8 to 30 carbon atoms.

[0014] Examples of sulfate ester salts include alkyl sulfate ester salts having an alkyl group with 8 to 30 carbon atoms, alkenyl sulfate ester salts having an alkenyl group with 8 to 30 carbon atoms, polyoxyalkylene alkyl ether sulfate ester salts having an alkyl group with 8 to 30 carbon atoms, polyoxyalkylene alkenyl ether sulfate ester salts having an alkenyl group with 8 to 30 carbon atoms, and polyoxyalkylene alkylphenyl ether sulfate ester salts having an alkyl group with 8 to 30 carbon atoms.

[0015] The average number of moles of oxyalkylene groups added to a sulfate ester salt having oxyalkylene groups, for example, the average number of moles of oxyethylene groups added, may preferably be 1 to 10 from the viewpoint of reducing the weight of the hydraulic composition and improving washability.

[0016] Examples of sulfonates include alkyl sulfonates having an alkyl group with 8 to 30 carbon atoms, α-olefinates having 8 to 30 carbon atoms, alkylbenzene sulfonates having an alkyl group with 8 to 30 carbon atoms, alkyl sulfosuccinate ester salts having an alkyl group with 8 to 30 carbon atoms, and alkyl sulfosuccinate ester salts of polyoxyalkylene (preferably polyoxyethylene, with an average addition mole of 1 or more, preferably 5 or less) having an alkyl group with 8 to 30 carbon atoms.

[0017] Examples of carboxylate salts include higher fatty acid salts having 8 to 30 carbon atoms.

[0018] From the viewpoint of reducing the weight of the hydraulic composition and improving cleaning performance, examples of anionic surfactant salts include inorganic salts such as sodium salts and potassium salts, and organic salts such as ammonium salts, monoethanolamine salts, diethanolamine salts, triethanolamine salts, and morpholine salts. From the viewpoint of cleaning performance, it is preferable to select one or more from inorganic salts such as sodium salts and potassium salts, and triethanolamine salts, and more preferably a sodium salt.

[0019] Specific examples of cationic surfactants having a hydrocarbon group with 8 to 30 carbon atoms include one or more selected from alkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylammonium salts, benzalkonium salts, benzethonium salts, imidazolium salts, and pyridinium salts, all of which have an alkyl group with 8 to 30 carbon atoms. Salts of the cationic surfactant include halogen salts of the cationic surfactant.

[0020] Specific examples of amphoteric surfactants having a hydrocarbon group with 8 to 30 carbon atoms include betaine-type surfactants and amine oxide-type surfactants. For example, one or more selected from alkyl sulfobetaine having an alkyl group with 8 to 30 carbon atoms, alkyl hydroxy sulfobetaine having an alkyl group with 8 to 30 carbon atoms, alkylamido hydroxy sulfobetaine having an alkyl group with 8 to 30 carbon atoms, long-chain alkyl (8 to 30 carbon atoms) dimethylaminoacetic acid betaine, alkyl (8 to 30 carbon atoms) carboxymethyl hydroxyethyl imidazolium betaine, alkyl (8 to 30 carbon atoms) amidopropyl betaine, and alkyldimethylamine oxide having an alkyl group with 8 to 30 carbon atoms.

[0021] Furthermore, nonionic surfactants may be included as other surfactants, as long as they do not hinder the expression of the effects of the present invention. Examples of nonionic surfactants having hydrocarbon groups with 8 to 30 carbon atoms include one or more selected from amine oxide type surfactants having hydrocarbon groups with 8 to 30 carbon atoms, glycoside type nonionic surfactants having hydrocarbon groups with 8 to 30 carbon atoms, polyoxyalkylene monoalkyl (8 to 30 carbon atoms) or alkenyl (8 to 30 carbon atoms) ether type nonionic surfactants, polyhydric alcohol fatty acid ester type or polyhydric alcohol alkyl ether type nonionic surfactants derived from fatty acids (8 to 30 carbon atoms) or aliphatic alcohols (8 to 30 carbon atoms), and fatty acid alkanolamide type nonionic surfactants with 8 to 30 carbon atoms in the fatty acid portion (acyl group) of fatty acid alkanolamides. Furthermore, glycoside type nonionic surfactants may be included in the polyhydric alcohol fatty acid ester type or polyhydric alcohol alkyl ether type nonionic surfactants.

[0022] Component (A) may preferably be an anionic surfactant having a hydrocarbon group with 8 to 30 carbon atoms, from the viewpoint of reducing the weight of the hydraulic composition and its cleaning properties. Component (A) may preferably contain an alkyl or alkenyl sulfate ester or salt thereof having an alkyl or alkenyl group with 12 carbon atoms [hereinafter, component (A1)].

[0023] Component (A1) may preferably be an alkyl or sulfate ester having a C12 alkyl group or a salt thereof. The salt of component (A1) may be one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts, and from the viewpoint of cleaning properties, it may preferably be one or more selected from inorganic salts such as sodium salts and potassium salts, and triethanolamine salts, more preferably sodium salts.

[0024] When component (A) contains component (A1), from the viewpoint of reducing the weight of the hydraulic composition, the content of component (A1) may be preferably 20% by mass or more, more preferably 30% by mass or more, of component (A), and from the viewpoint of the washability of the hydraulic composition, it may be preferably 80% by mass or less, more preferably 75% by mass or less. In the present invention, the mass of component (A1) shall be the value converted to sodium salt. In one embodiment, when component (A) contains component (A1), the content of component (A1) may be, for example, 20% by mass or more and 80% by mass or less, more preferably 30% by mass or more and 80% by mass or less, more preferably 20% by mass or more and 75% by mass or less, of component (A).

[0025] Furthermore, from the viewpoint of reducing the weight of the hydraulic composition and improving washability, component (A) may preferably contain component (A1) and (A2) alkyl or alkenyl sulfate esters or salts thereof other than component (A1) [hereinafter referred to as component (A2)].

[0026] Component (A2) may preferably be an alkyl or alkenyl sulfate ester having an alkyl or alkenyl group having 8 to 30 carbon atoms, or a salt thereof, and may not contain component (A1). Component (A2) may preferably be an alkyl or alkenyl sulfate ester having an alkyl group having 10 or more carbon atoms, and preferably 18 carbon atoms or less, or a salt thereof (however, it may not contain component (A1)). The salt of component (A2) may be one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts, and from the viewpoint of detergency, it may preferably be one or more selected from inorganic salts such as sodium salts and potassium salts, and triethanolamine salts, more preferably sodium salts.

[0027] (A2) Specifically, the component may be one or more selected from octyl sulfate, decyl sulfate, tetradecyl sulfate, hexadecyl sulfate, octadecyl sulfate, 2-ethylhexyl sulfate, 2-propylheptyl sulfate, and salts thereof. From the viewpoint of reducing the weight of the hydraulic composition and its washability, it may preferably be one or more selected from octyl sulfate, decyl sulfate, tetradecyl sulfate, hexadecyl sulfate, and salts thereof, and more preferably, it may be one or more selected from octyl sulfate, decyl sulfate, and salts thereof.

[0028] When component (A) contains component (A2), from the viewpoint of reducing the weight of the hydraulic composition and its washability, the content of component (A2) may be preferably 10% by mass or more, more preferably 20% by mass or more, and from the viewpoint of reducing the weight of the hydraulic composition and its washability, preferably 80% by mass or less, more preferably 70% by mass or less, and even more preferably 60% by mass or less. In the present invention, the mass of component (A2) shall be the value converted to sodium salt. In one embodiment, when component (A) contains component (A2), the content of component (A2) may be, for example, 10% by mass or more and 80% by mass or less, more preferably 20% by mass or more and 80% by mass or less, more preferably 10% by mass or more and 70% by mass or less, more preferably 20% by mass or more and 70% by mass or less, more preferably 10% by mass or more and 60% by mass or less, and even more preferably 20% by mass or more and 60% by mass or less, in the total weight of component (A).

[0029] When component (A) contains components (A1) and (A2), from the viewpoint of reducing the weight of the hydraulic composition and its cleanability, the mass ratio of the content of component (A1) to the content of component (A2), [(A1) / (A2)], is preferably 0.3 or more, more preferably 0.55 or more, and from the viewpoint of reducing the weight of the hydraulic composition and its cleanability, it may be preferably 9 or less, more preferably 5 or less, and more preferably 3 or less. In the present invention, the masses of components (A1) and (A2) shall be the values ​​converted to sodium salts. In one embodiment, when component (A) contains components (A1) and (A2), the mass ratio [(A1) / (A2)] may be, for example, 0.3 or more and 9 or less, more preferably 0.55 or more and 9 or less, more preferably 0.3 or more and 5 or less, more preferably 0.55 or more and 5 or less, more preferably 0.3 or more and 3 or less, and more preferably 0.55 or more and 3 or less.

[0030] From the viewpoint of reducing the weight of the hydraulic composition and improving washability, the total content of components (A1) and (A2) in component (A) is preferably 50% by mass or more, more preferably 70% by mass or more, and from the viewpoint of reducing the weight of the hydraulic composition and improving washability, it may be 97% by mass or less, more preferably 95% by mass or less, and may also be 100% by mass.

[0031] <Component (B)> The foaming agent for hydraulic compositions of the present invention may contain a nonionic compound with a LogP of 0 to 7.0 as component (B).

[0032] Component (B) may preferably be a nonionic compound, preferably a nonionic alcohol, having a LogP of 1 or more, preferably 6.5 or less, more preferably 6.0 or less, even more preferably 5.5 or less, even more preferably 5 or less, even more preferably 4 or less, and even more preferably 3.5 or less, from the viewpoint of reducing the weight of the hydraulic composition. In one embodiment, component (B) may, for example, be a nonionic compound, preferably a nonionic alcohol, having a LogP of 0 to 7, even more preferably 0 to 6.5, even more preferably 0 to 5.5, even more preferably 1 to 7, even more preferably 1 to 6.5, and even more preferably 1 to 5.5.

[0033] In this invention, the LogP value is a coefficient that indicates the affinity of an organic compound for water and 1-octanol. The 1-octanol / water partition coefficient P is the ratio of the equilibrium concentrations of the compound in each solvent at the partition equilibrium when a trace amount of the compound is dissolved as a solute in a two-phase solvent of 1-octanol and water, and is generally expressed in the form of its logarithm LogP with base 10. LogP values ​​for many compounds have been reported, and many values ​​are listed in databases available from Daylight Chemical Information Systems, Inc. (Daylight CIS), ICSC database, etc., so they can be referred to. If there is no measured LogP value, it can be calculated using a program such as "CLogP" available from Daylight CIS. If a measured LogP value is available, this program outputs the "calculated LogP (CLogP)" value calculated by Hansch, Leo's fragment approach along with the measured LogP value. The fragment approach is based on the chemical structure of the compound, taking into account the number of atoms and the type of chemical bonds (cf. A. Leo, Comprehensive Medicinal Chemistry, Vol.4, C. Hansch, PGSammens, JBTaylor and CA Ramsden, Eds., p.295, Pergamon Press, 1990). This CLogP value can be used in place of the measured LogP value when selecting a compound. In this invention, if a measured LogP value is available, it is used; otherwise, the CLogP value calculated using the EPI Suite (registered trademark; The Estimations Program Interface for Windows version 1.67), software jointly developed by the U.S. Environmental Protection Agency and Syracuse, is used. The LogP value of polymers is calculated by determining the chemical structure from the degree of polymerization calculated from the average molecular weight.

[0034] Component (B) may, in one embodiment, be one or more selected from nonionic monohydric alcohols with a LogP of 0 to 7.0 and nonionic polyhydric alcohols with a LogP of 0 to 7.0. In one embodiment, component (B) may, for example, be one or more selected from monohydric alcohols and nonionic alcohols with a LogP of 0 to 7, further 0 to 6.5, further 0 to 5.5, further 1 to 7, further 1 to 6.5, and further 1 to 5.5.

[0035] Furthermore, as one embodiment, component (B) is a nonionic alcohol having a LogP of 0 to 7.0, wherein the nonionic alcohol may be one or more selected from monohydric alcohols having a linear or branched alkyl group, monohydric alcohols having a linear or branched alkenyl group, dihydric alcohols having a linear or branched alkenyl group, aromatic monohydric alcohols, alicyclic monohydric alcohols, and polyalkylene glycol alkyl ethers. As one embodiment, component (B) may be, for example, one or more selected from monohydric alcohols having a linear or branched alkyl group, monohydric alcohols having a linear or branched alkenyl group, dihydric alcohols having a linear or branched alkenyl group, aromatic monohydric alcohols, alicyclic monohydric alcohols, and polyalkylene glycol alkyl ethers, with a LogP of 0 to 7, moreover 0 to 6.5, moreover 0 to 5.5, moreover 1 to 7, moreover 1 to 6.5, and moreover 1 to 5.5.

[0036] (B) Specifically, the components are 1-propyl alcohol (LogP: 0.25), 2-propyl alcohol (LogP: 0.05), 1-butyl alcohol (LogP: 0.88), 2-butyl alcohol (LogP: 0.61), 2-methyl-1-propyl alcohol (LogP: 0.76), 2-methyl-2-propyl alcohol (LogP: 0.35), 1-pentyl alcohol (LogP: 1.51), 2-pentyl alcohol (LogP: 1.19), 3-pentyl alcohol (LogP: 1.21), and 2-methyl-1-butyl alcohol. Kohl (LogP: 1.29), 2-methyl-2-butyl alcohol (LogP: 0.89), 3-methyl-2-butyl alcohol (LogP: 1.28), 3-methyl-1-butyl alcohol (LogP: 1.16), cyclopentyl alcohol (LogP: 0.71), benzyl alcohol (LogP: 1.1), 2-hexyl alcohol (LogP: 1.76), 3-hexyl alcohol (LogP: 1.65), 2-methyl-1-pentyl alcohol (LogP: 1.75), 3-methyl-1-pentyl alcohol (LogP: 1. 75), 4-methyl-1-pentyl alcohol (LogP: 1.75), 2-methyl-2-pentyl alcohol (LogP: 1.57), 3-methyl-2-pentyl alcohol (LogP: 1.57), 4-methyl-2-pentyl alcohol (LogP: 1.57), 2-methyl-3-pentyl alcohol (LogP: 1.57), 3-methyl-3-pentyl alcohol (LogP: 1.57), 2,2-dimethyl-1-butyl alcohol (LogP: 1.57), 2-ethyl-1-butyl alcohol (LogP: 1.75), cyclohexyl One or more alcohols selected from 1-Heptyl alcohol (LogP: 1.23), 1-Heptyl alcohol (LogP: 2.62), 1-Hexyl alcohol (LogP: 2.03), 2-Ethyl-1-Hexyl alcohol (LogP: 2.73), 6-Methyl-1-Heptyl alcohol (LogP: 2.73), 1-Octyl alcohol (LogP: 3), 1-Decyl alcohol (LogP: 4.23), 1-Dodecanol (LogP: 5.13), 1-Tetradecanol (LogP: 5.5), and 1-Hexadecanol (LogP: 6.7) are examples.

[0037] Component (B) may preferably be one or more selected from 2-hexyl alcohol, 3-hexyl alcohol, 1-octyl alcohol (C8OH), benzyl alcohol (BnOH), 1-decanol, and 1-dodecanol, more preferably one or more selected from 2-hexyl alcohol, 3-hexyl alcohol, 1-octyl alcohol, 1-dodecanol, and benzyl alcohol, and even more preferably one or more selected from 1-octyl alcohol, 1-dodecanol, and benzyl alcohol.

[0038] <Component (C)> The foaming agent for hydraulic compositions of the present invention may contain, as component (C), an organic compound with a LogP of -5.0 or more and less than 0. The method for calculating the LogP value of component (C) may be the same as the method for calculating the LogP value of component (B).

[0039] Component (C) may be an organic compound having a LogP of -3.0 or higher, more preferably -2.5 or higher, more preferably -0.05 or lower, more preferably -0.07 or lower, even more preferably -0.09 or lower, even more preferably -0.1 or lower, and more preferably -0.2 or lower, from the viewpoint of the cleaning properties of the hydraulic composition. Component (C) may also be an organic compound having a LogP within the above range and preferably one or more hydroxyl groups, more preferably two or more, more preferably 10 or fewer, and more preferably five or fewer. Among these components (C), nonionic organic compounds are preferred, and one or more selected from monohydric alcohols and polyhydric alcohols are more preferred. In one embodiment, component (C) may be, for example, an organic compound, or more specifically, a nonionic organic compound, having a LogP of -5.0 or more and less than 0, more specifically -5.0 or more and less than or equal to -0.1, more specifically -3.0 or more and less than or equal to -0.1, more specifically -2.5 or more and less than or equal to -0.1, more specifically -3.0 or more and less than or equal to -0.2, and having, for example, one to ten hydroxyl groups, more specifically two to ten hydroxyl groups, more specifically one to five hydroxyl groups, and more specifically two to five hydroxyl groups.

[0040] As one embodiment, the component (C) may be, for example, one or more selected from monohydric alcohols and polyhydric alcohols having a LogP of -5.0 or more and less than 0, more preferably -5.0 or more and -0.1 or less, still more preferably -3.0 or more and -0.1 or less, still more preferably -2.5 or more and -0.1 or less, still more preferably -3.0 or more and -0.2 or less, still more preferably -2.5 or more and -0.2 or less.

[0041] As another embodiment, the component (C) may be, for example, one or more selected from monohydric alcohols having a linear or branched alkyl group, monohydric alcohols having a linear or branched alkenyl group, dihydric alcohols having a linear or branched alkenyl group, polyalkylene glycols, and alkanolamines, having a LogP of -5.0 or more and less than 0, more preferably -5.0 or more and -0.1 or less, still more preferably -3.0 or more and -0.1 or less, still more preferably -2.5 or more and -0.1 or less, still more preferably -3.0 or more and -0.2 or less, still more preferably -2.5 or more and -0.2 or less.

[0042] Specific examples of the component (C) include one or more selected from methyl alcohol (LogP: -0.77), ethyl alcohol (EtOH) (LogP: -0.31), propylene glycol (PG) (LogP: -0.92), dipropylene glycol (DPG) (LogP: -1.17), polyethylene glycol 400 (PEG400) (LogP: -0.69), 1,3-butanediol (1,3-BG) (LogP: -0.74), 2,2-dimethyl-1,3-propanediol (NPG) (LogP: -0.84), 1,6-hexanediol (1,6-HG) (LogP: -0.11), 1,2-hexanediol (1,2-HG) (LogP: -0.58), 2-aminoethanol (MEA) (LogP: -1.31), diethanolamine (DEA) (LogP: -1.43), and triethanolamine (TEA) (LogP: -2.3).

[0043] Component (C) is preferably at least one selected from dipropylene glycol, ethyl alcohol, 1,3-butanediol, 2,2-dimethyl-1,3-propanediol, 1,6-hexanediol, 2-aminoethanol, diethanolamine, and triethanolamine from the viewpoint of the detergency of the hydraulic composition, more preferably at least one selected from dipropylene glycol, 1,6-hexanediol, and ethyl alcohol, and even more preferably 1,6-hexanediol or dipropylene glycol from the viewpoint of detergency.

[0044] Also, as another embodiment, component (C) may be a mixture of the organic compounds listed above, and preferably a mixture of organic compounds containing dipropylene glycol, more preferably a mixture of two or more selected from dipropylene glycol, ethyl alcohol, 2-aminoethanol, diethanolamine, and triethanolamine (-1.9 to -2.3) from the viewpoint of detergency.

[0045] <Composition, etc.> The foaming agent for the hydraulic composition of the present invention contains component (A) preferably at least 10% by mass or more, more preferably at least 20% by mass or more, even more preferably at least 22% by mass or more, still more preferably at least 24% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 33% by mass or less, still more preferably 29% by mass or less in the foaming agent, from the viewpoints of weight reduction and detergency of the hydraulic composition. In the present invention, the mass of component (A) shall be the value converted to the sodium salt in the case of an anionic surfactant and the value converted to the compound excluding the counter ion in the case of a cationic surfactant, respectively. As one embodiment, in the foaming agent for the hydraulic composition of the present invention, the content of component (A) may be, for example, 10% by mass or more and 50% by mass or less, further 20% by mass or more and 40% by mass or less, further 22% by mass or more and 33% by mass or less, further 22% by mass or more and 29% by mass or less.

[0046] The foaming agent for hydraulic compositions of the present invention, when containing component (A1) as component (A), may contain component (A1) in an amount of preferably 5% by mass or more, more preferably 8% by mass or more, preferably 40% by mass or less, more preferably 35% by mass or less, even more preferably 33% by mass or less, and even more preferably 29% by mass or less, from the viewpoint of reducing the weight of the hydraulic composition and improving washability. In the present invention, the mass of component (A1) shall be the value converted to sodium salt. In one embodiment, when component (A) contains component (A1), the content of component (A1) in the foaming agent for hydraulic compositions of the present invention may be, for example, 5% by mass or more and 40% by mass or less, more preferably 8% by mass or more and 30% by mass or less, more preferably 8% by mass or more and 33% by mass or less, and even more preferably 8% by mass or more and 29% by mass or less.

[0047] The foaming agent for hydraulic compositions of the present invention, when component (A) contains component (A2), may contain component (A2) in an amount preferably 2% by mass or more, more preferably 4% by mass or more, preferably 40% by mass or less, and more preferably 30% by mass or less, from the viewpoint of reducing the weight of the hydraulic composition and improving washability. In the present invention, the mass of component (A2) shall be the value converted to sodium salt. In one embodiment, when component (A) contains component (A1), the content of component (A1) in the foaming agent for hydraulic compositions of the present invention may be, for example, 5% by mass or more and 40% by mass or less, more preferably 8% by mass or more and 40% by mass or less, more preferably 5% by mass or more and 35% by mass or less, and more preferably 8% by mass or more and 35% by mass or less.

[0048] The foaming agent for hydraulic compositions of the present invention may contain component (B) in an amount preferably 1% by mass or more, more preferably 2.5% by mass or more, preferably 10% by mass or less, and more preferably 6% by mass or less, from the viewpoint of reducing the weight of the hydraulic composition and improving washability. In one embodiment, the content of component (B) in the foaming agent for hydraulic compositions of the present invention may be, for example, 1% by mass or more and 10% by mass or less, more preferably 2.5% by mass or more and 10% by mass or less, more preferably 1% by mass or more and 6% by mass or less, and more preferably 2.5% by mass or more and 6% by mass or less.

[0049] The foaming agent for hydraulic compositions of the present invention may contain component (C) in an amount preferably 1% by mass or more, more preferably 3% by mass or more, and for example, preferably 20% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less, from the viewpoint of reducing the weight of the hydraulic composition and improving washability. In one embodiment, the content of component (C) in the foaming agent for hydraulic compositions of the present invention may be, for example, 1% by mass or more and 20% by mass or less, more preferably 3% by mass or more and 10% by mass or less, more preferably 1% by mass or more and 5% by mass or less, and even more preferably 3% by mass or more and 5% by mass or less.

[0050] In the foaming agent for hydraulic compositions of the present invention, the content of component (B) relative to the content of component (A) is preferably 0.04 or more, more preferably 0.08 or more, and even more preferably 0.11 or more in mass ratio [(B) / (A)] from the viewpoint of reducing the weight of the hydraulic composition, and preferably 0.4 or less, more preferably 0.30 or less, and even more preferably 0.22 or less from the viewpoint of the washability of the hydraulic composition. In the present invention, the mass of component (A) is the value converted to the sodium salt. In one embodiment, the mass ratio [(B) / (A)] may be, for example, 0.04 or more and 0.4 or less, more preferably 0.08 or more and 0.4 or less, more preferably 0.08 or more and 0.30 or less, more preferably 0.04 or more and 0.3 or less, more preferably 0.11 or more and 0.30 or less, and even preferably 0.11 or more and 0.22 or less.

[0051] The foaming agent for hydraulic compositions of the present invention, when component (A) contains component (A1), the mass ratio of component (B) to the content of component (A1) in the foaming agent is preferably 0.1 or more, more preferably 0.11 or more, even more preferably 0.15 or more, and still more preferably 0.22 or more, from the viewpoint of reducing the weight of the hydraulic composition and the cleanability, and also preferably 0.8 or less, more preferably 0.6 or less, and still more preferably 0.30 or less. In one embodiment, when component (A) contains component (A1), the mass ratio [(B) / (A1)] may be, for example, 0.1 or more and 0.8 or less, even more preferably 0.15 or more and 0.8 or less, even more preferably 0.11 or more and 0.6 or less, even more preferably 0.15 or more and 0.6 or less, even more preferably 0.15 or more and 0.30 or less.

[0052] In the foaming agent for hydraulic compositions of the present invention, the mass ratio [(B) / (C)] of the content of component (B) to the content of component (C) is preferably 0.1 or more, more preferably 1.0 or more, even more preferably 1.4 or more, and also preferably 10 or less, more preferably 4 or less, even more preferably 2 or less, and even more preferably 1.7 or less, from the viewpoint of reducing the weight of the hydraulic composition and the cleanability of the composition. In one embodiment, the mass ratio [(B) / (C)] may be, for example, 0.1 or more and 10 or less, more preferably 1.0 or more and 10 or less, more preferably 1.4 or more and 10 or less, more preferably 0.1 or more and 4 or less, more preferably 1.0 or more and 4 or less, even preferably 1.4 or more and 4 or less, even preferably 0.1 or more and 2 or less, even preferably 1.0 or more and 2 or less, even preferably 1.4 or more and 2 or less, and even preferably 1.0 or more and 1.7 or less.

[0053] In the foaming agent for hydraulic compositions of the present invention, the amount of component (C) relative to the total amount of component (B) and component (C) is, in terms of mass ratio [(C) / [(B)+(C)]], preferably 0.1 or more, more preferably 0.25 or more, even more preferably 0.33 or more, and also preferably 0.9 or less, more preferably 0.6 or less, even more preferably 0.5 or less. In one embodiment, the mass ratio [(C) / [(B)+(C)]] may be, for example, 0.1 or more and 0.9 or less, more preferably 0.25 or more and 0.9 or less, more preferably 0.1 or more and 0.6 or less, more preferably 0.25 or more and 0.6 or less, more preferably 0.25 or more and 0.5 or less, and even more preferably 0.33 or more and 0.5 or less.

[0054] The foaming agent for hydraulic compositions of the present invention may contain water. The foaming agent for hydraulic compositions of the present invention may contain water in the foaming agent, preferably 40% by mass or more, preferably 50% by mass or more, more preferably 60% by mass or more, preferably 90% by mass or less, more preferably 88% by mass or less, even more preferably 85% by mass or less, and even more preferably 80% by mass or less. In one embodiment, when water is contained, the water content in the foaming agent of the present invention may be, for example, 40% by mass or more and 90% by mass or less, more preferably 50% by mass or more and 90% by mass or less, more preferably 60% by mass or more and 90% by mass or less, more preferably 40% by mass or more and 85% by mass or less, more preferably 50% by mass or more and 85% by mass or less, more preferably 60% by mass or more and 85% by mass or less, more preferably 40% by mass or more and 80% by mass or less, more preferably 50% by mass or more and 80% by mass or less, and even more preferably 60% by mass or more and 80% by mass or less.

[0055] As one embodiment, the foaming agent for hydraulic compositions of the present invention contains component (A), component (B), component (C), and water, wherein the content of component (A) is 10% by mass or more and 50% by mass or less, the content of component (B) is 1% by mass or more and 10% by mass or less, and the content of component (C) is 1% by mass or more and 20% by mass or less, and the total content of component (A), component (B), component (C), and water may be essentially 100% by mass. Here, in the foaming agent for hydraulic compositions of the present invention, "essentially" means that components other than component (A), component (B), and component (C) may be included to the extent that they do not affect the action and effect of the present invention, but for example, components other than component (A), component (B), component (C), and water that would affect the action and effect of the present invention are not included.

[0056] That is, as one embodiment of the present invention, a foaming agent for a hydraulic composition containing component (A), component (B), component (C), and water, wherein the content of component (A) is 10% by mass or more and 50% by mass or less, the content of component (B) is 1% by mass or more and 10% by mass or less, the content of component (C) is 1% by mass or more and 20% by mass or less, and the water content in the foaming agent for a hydraulic composition is 40% by mass or more and 90% by mass or less, may be used in a hydraulic composition.

[0057] In another embodiment, the foaming agent for hydraulic compositions of the present invention contains component (A), component (B), component (C), and water, wherein the content of component (A) is 10% by mass or more and 50% by mass or less, the content of component (B) is 1% by mass or more and 10% by mass or less, and the content of component (C) is 1% by mass or more and 20% by mass or less, and the total content of component (A), component (B), and component (C) in the total content of components (other than water) contained in the foaming agent may be preferably 80% by mass or more, more preferably 90% by mass or more, and even more preferably 100% by mass, in terms of solid content.

[0058] The foaming agent for hydraulic compositions of the present invention may optionally contain water-reducing agents, thickeners, chelating agents, heavy metal scavenging agents, rust inhibitors, preservatives, colorants, fragrances, defoaming agents, solvents, dispersants, flocculants, water-soluble polymers, etc. However, those used are those that do not fall under components (A1), (A2), (B), and (C).

[0059] The dispersant contained in the foaming agent for hydraulic compositions of the present invention may, for example, preferably, be one or more compounds selected from naphthalene polymers, polycarboxylic acid polymers, ligninsulfonic acid polymers, melamine polymers, polymers containing phosphate groups in their structure, and polymers containing aromatics having polyalkylene oxy groups. More preferably, it may be one or more compounds selected from naphthalene polymers, polycarboxylic acid polymers, ligninsulfonic acid polymers, polymers containing phosphate groups in their structure, and polymers containing aromatics having polyalkylene oxy groups.

[0060] The foaming agent for hydraulic compositions of the present invention is obtained by mixing component (A), component (B), component (C), and the aforementioned optional component. During mixing, the solution may be heated as appropriate to reduce its viscosity.

[0061] Applications for the foaming agent for hydraulic compositions of the present invention include hydraulic compositions containing bubbles, such as freeze-resistant concrete, gypsum slurry, lightweight milk (bubble milk, air milk), lightweight mortar (bubble mortar, air mortar), lightweight concrete (bubble concrete, air concrete), backfill material, inter-fill material, concrete blocks for construction, ALC (autoclaved lightweight concrete), grout material, porous ceramics, bricks, refractories, lightweight embankments, mortar for pumping, sprayed concrete, and sprayed mortar. In these bubble-containing hydraulic compositions, the mixing of bubbles is expected to impart functions such as weight reduction, strength improvement, fluidity improvement, heat insulation, heat resistance, viscosity imparting, and fluidity control. Among these bubble-containing hydraulic compositions, the foaming agent for hydraulic compositions of the present invention is suitable for freeze-resistant concrete, gypsum slurry, and lightweight concrete.

[0062] The foaming agent for hydraulic compositions of the present invention may be used as a mixed solution obtained by diluting it with water, and the mixed solution may be foamed and kneaded into the hydraulic substance, or the mixed solution may be kneaded into the hydraulic substance as is. The method of adding the foaming agent for hydraulic compositions of the present invention to the hydraulic composition is not limited, nor is the method of foaming the foaming agent for hydraulic compositions of the present invention or a mixed solution obtained by diluting it with water limited. In the present invention, the hydraulic substance refers to a paste, slurry, mortar, or concrete prepared as a hydraulic powder from one or more materials selected from cement, gypsum, and mixtures thereof.

[0063] In exemplary embodiments, the present invention provides a foaming agent for hydraulic compositions comprising 10% to 50% by mass of component (A), 1% to 10% by mass of component (B), and 1% to 20% by mass of component (C). The foaming agent for hydraulic compositions of the present invention may further contain 40% to 90% by mass of water. Component (A), component (B), component (C), and water are the same as those described in the foaming agent for hydraulic compositions of the present invention. In the foaming agent for hydraulic compositions of the present invention, the amount of each component, the amount of water, and their mixing ratios can be appropriately applied by substituting the content or usage amount of each component with the amount of each component, within the range of content or usage amount of each component and their mass ratios described in the foaming agent for hydraulic compositions of the present invention.

[0064] [Method for Manufacturing a Foaming Agent for Hydraulic Compositions] In an exemplary embodiment, the present invention provides a method for manufacturing a foaming agent for hydraulic compositions, comprising mixing component (A) in an amount of 10% to 50% by mass, component (B) in an amount of 1% to 10% by mass, and component (C) in an amount of 1% to 20% by mass. The method for manufacturing a foaming agent for hydraulic compositions of the present invention may further involve mixing in 40% to 90% by mass of water. Component (A), component (B), component (C), and water are the same as those described in the foaming agent for hydraulic compositions of the present invention. In the foaming agent for hydraulic compositions of the present invention, the amount of each component mixed, the amount of water mixed, and their mixing ratios can be appropriately applied by substituting the content of each component for the amount of each component for the amount of each component, within the range of the content of each component and the range of their mass ratios described in the surface aesthetics improving agent composition for hydraulic compositions of the present invention. The method for manufacturing a foaming agent for hydraulic compositions of the present invention can appropriately apply the embodiments described in the foaming agent for hydraulic compositions of the present invention.

[0065] That is, in another embodiment, the present invention provides a method for mixing a foaming agent for a hydraulic composition, which is obtained by mixing (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter, component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter, component (B)], and (C) an organic compound with a LogP of -5.0 or more and less than 0 [hereinafter, component (C)] with a hydraulic composition containing hydraulic powder and water, wherein the foaming agent for the hydraulic composition is obtained by mixing component (A) in an amount of 10% to 50% by mass, component (B) in an amount of 1% to 10% by mass, and component (C) in an amount of 1% to 20% by mass with the hydraulic composition.

[0066] [Bubble-containing hydraulic composition] In one embodiment, the present invention provides a bubble-containing hydraulic composition containing a hydraulic powder, water, component (A), component (B), and component (C), wherein the content of component (A) in the hydraulic composition is 0.000005 parts by mass or more and 0.2 parts by mass or less per 100 parts by mass of hydraulic powder, the content of component (B) is 0.0000005 parts by mass or more and 0.06 parts by mass or less per 100 parts by mass of hydraulic powder, and the content of component (C) is 0.0000005 parts by mass or more and 0.06 parts by mass or less per 100 parts by mass of hydraulic powder. In another embodiment, the present invention provides a bubble-containing hydraulic composition containing a hydraulic powder, water, and the foaming agent for the hydraulic composition of the present invention described above.

[0067] The foam-containing hydraulic composition of the present invention may appropriately apply the matters described in the foaming agent for hydraulic compositions of the present invention. Components (A), (B), (C), and optional components used in the foam-containing hydraulic composition of the present invention may be the same as those described in the foaming agent for hydraulic compositions of the present invention.

[0068] Hydraulic powder refers to a powder that hardens through a hydration reaction, and examples include cement and gypsum. Preferably, it may be cement, gypsum, or a mixture thereof.

[0069] Examples of cements include ordinary Portland cement, rapid-hardening Portland cement, ultra-rapid-hardening Portland cement, sulfate-resistant Portland cement, low-heat Portland cement, moderate-heat Portland cement, white Portland cement, alumina cement, and eco-cement (e.g., JIS R 5214). Blast furnace slag cement, fly ash cement, silica fume cement, metakaolin cement, LC3 cement, etc., which are made by adding blast furnace slag, fly ash, silica fume, stone powder (calcium carbonate powder), metakaolin, calcined clay, etc., to these cements are also acceptable.

[0070] Any type of gypsum can be used, including high-quality neutralized gypsum, phosphate gypsum (a by-product of phosphoric acid), flue gas desulfurization gypsum generated from thermal power plants, natural gypsum containing various impurities and clay, and mixtures thereof. The clay contained in the gypsum may mainly consist of hydrated silicate minerals with a layered structure (hereinafter referred to as clay minerals), and examples of clay minerals contained as fine-grained minerals in this clay include kaolin minerals (kaolinite, dickite, and nacrite), serpentine (lizardite, antigorite, chrysotile), mica clay minerals (illite, sericite, erythrolite, celadonite), chlorite, vermiculite, and smectite (montmorillonite, bydelite, nontronite, saponite, hectorite).

[0071] Examples of gypsum include anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum, and preferably hemihydrate gypsum (calcined gypsum). As raw material gypsum, natural gypsum, neutralized gypsum, or chemical gypsum such as by-product gypsum can be used alone or as a mixture of two or more of these. Examples of major chemical gypsums include phosphate gypsum, hydrofluoric acid gypsum, titanium gypsum, or flue gas desulfurization gypsum. Furthermore, recycled gypsum may be included in the raw material gypsum. Recycled gypsum can be any recycled gypsum recovered from waste gypsum boards generated in-house by gypsum board manufacturers, or waste gypsum boards generated during new construction and demolition. The present invention can be suitably used with any of these raw material gypsums, and excellent effects can also be obtained with blends in various proportions.

[0072] The hydraulic powder may, in one embodiment, be cement, in another embodiment, be gypsum, or in yet another embodiment, be a mixture of cement and gypsum. The hydraulic powder may contain cement and other hydraulic powders, for example, preferably ordinary Portland cement may be contained in the hydraulic powder at a concentration of preferably 25% by mass or more, more preferably 35% by mass or more, even more preferably 50% by mass or more, even more preferably 60% by mass or more, even more preferably 70% by mass or more, and preferably 95% by mass or less, more preferably 92% by mass or less, even more preferably 90% by mass or less, and even more preferably 85% by mass or less.

[0073] The water / hydraulic powder ratio of the bubble-containing hydraulic composition of the present invention is preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, even more preferably 50% by mass or more, even more preferably 60% by mass or more, and even more preferably 65% ​​by mass or more, from the viewpoint of slurry fluidity, and preferably 100% by mass or less, more preferably 90% by mass or less, even more preferably 80% by mass or less, and even more preferably 75% by mass or less, from the viewpoint of hardened body strength. Here, the water / hydraulic powder ratio is the mass percentage (mass%) of water and hydraulic powder in the hydraulic composition, and is calculated as water / hydraulic powder × 100. The water / hydraulic powder ratio is calculated based on the amount of powder having physical properties that harden by hydration reaction. If the powder having physical properties that harden by hydration reaction contains a high-strength admixture, the amount of the high-strength admixture is also included in the amount of hydraulic powder. The same may apply to other quantitative relationships of the hydraulic composition with respect to the hydraulic powder. In one embodiment, the water / hydraulic powder ratio may be, for example, 20% by mass or more and 100% by mass or less, more precisely 40% by mass or more and 85% by mass or less, or more precisely 60% by mass or more and 80% by mass or less.

[0074] The bubble-containing hydraulic composition of the present invention may contain component (A) in an amount of, for example, preferably 0.000005 parts by mass or more, more preferably 0.000006 parts by mass or more, even more preferably 0.00005 parts by mass or more, even more preferably 0.0005 parts by mass or more, and preferably 0.2 parts by mass or less, and even more preferably 0.1 parts by mass or less, per 100 parts by mass of hydraulic powder, from the viewpoint of reducing the weight of the hydraulic composition and its washability. In one embodiment, the content of component (A) in the hydraulic composition per 100 parts by mass of hydraulic powder may be, for example, 0.000005 parts by mass or more and 0.2 parts by mass or less, further 0.000006 parts by mass or more and 0.2 parts by mass or less, further 0.000005 parts by mass or more and 0.1 parts by mass or less, and even further 0.000006 parts by mass or more and 0.1 parts by mass or less.

[0075] In the present invention, if component (A) contains component (A1), component (A1) may be contained in an amount of 0.000005 parts by mass or more, more preferably 0.000006 parts by mass or more, and preferably 0.2 parts by mass or less, and more preferably 0.1 parts by mass or less, per 100 parts by mass of hydraulic powder, from the viewpoint of reducing the weight of the hydraulic composition and its washability. In one embodiment, if component (A) contains component (A1), the content of component (A1) per 100 parts by mass of hydraulic powder in the hydraulic composition may be, for example, 0.000005 parts by mass or more and 0.2 parts by mass or less, further 0.000006 parts by mass or more and 0.2 parts by mass or less, further 0.000005 parts by mass or more and 0.1 parts by mass or less, and further 0.000006 parts by mass or more and 0.1 parts by mass or less.

[0076] In the present invention, if component (A) contains component (A2), component (A2) may be contained in an amount of 0.000005 parts by mass or more, more preferably 0.000006 parts by mass or more, and preferably 0.2 parts by mass or less, and more preferably 0.1 parts by mass or less, per 100 parts by mass of hydraulic powder, from the viewpoint of reducing the weight of the hydraulic composition and its washability. In one embodiment, if component (A) contains component (A2), the content of component (A2) per 100 parts by mass of hydraulic powder in the hydraulic composition may be, for example, 0.000005 parts by mass or more and 0.2 parts by mass or less, further 0.000006 parts by mass or more and 0.2 parts by mass or less, further 0.000005 parts by mass or more and 0.1 parts by mass or less, and further 0.000006 parts by mass or more and 0.1 parts by mass or less.

[0077] The bubble-containing hydraulic composition of the present invention may contain component (B) in an amount of 0.0000005 parts by mass or more, more preferably 0.000001 parts by mass or more, even more preferably 0.00001 parts by mass or more, and preferably 0.06 parts by mass or less, and even more preferably 0.03 parts by mass or less, per 100 parts by mass of hydraulic powder, from the viewpoint of reducing the weight of the hydraulic composition and its washability. In one embodiment, the content of component (B) per 100 parts by mass of hydraulic powder in the hydraulic composition may be, for example, 0.0000005 parts by mass or more and 0.06 parts by mass or less, further 0.000001 parts by mass or more and 0.06 parts by mass or less, further 0.0000005 parts by mass or more and 0.03 parts by mass or less, and even further 0.000001 parts by mass or more and 0.03 parts by mass or less.

[0078] The bubble-containing hydraulic composition of the present invention may contain component (C) in an amount of 0.0000005 parts by mass or more, more preferably 0.000001 parts by mass or more, even more preferably 0.00001 parts by mass or more, and preferably 0.06 parts by mass or less, and even more preferably 0.03 parts by mass or less, per 100 parts by mass of hydraulic powder, from the viewpoint of reducing the weight of the hydraulic composition and its washability. In one embodiment, the content of component (C) per 100 parts by mass of hydraulic powder in the hydraulic composition may be, for example, 0.0000005 parts by mass or more and 0.06 parts by mass or less, further 0.000001 parts by mass or more and 0.06 parts by mass or less, further 0.0000005 parts by mass or more and 0.03 parts by mass or less, and even further 0.000001 parts by mass or more and 0.03 parts by mass or less.

[0079] The bubble-containing hydraulic composition of the present invention may contain components (A) and (B) in such a ratio [(B) / (A)] per 100 parts by mass of hydraulic powder that the mass ratio of the content of component (A) to the content of component (B) is preferably 0.04 or more, more preferably 0.08 or more, even more preferably 0.11 or more, from the viewpoint of reducing the weight of the hydraulic composition, and from the viewpoint of the washability of the hydraulic composition, preferably 0.4 or less, more preferably 0.30 or less, even more preferably 0.22 or less. In one embodiment, the mass ratio [(B) / (A)] may be, for example, 0.04 or more and 0.4 or less, more preferably 0.08 or more and 0.4 or less, more preferably 0.08 or more and 0.30 or less, more preferably 0.04 or more and 0.3 or less, even preferably 0.11 or more and 0.30 or less, even preferably 0.11 or more and 0.22 or less.

[0080] In the present invention, when the hydraulic composition contains component (A1) as component (A), the mass ratio of component (B) to the content of component (A1) in the composition is preferably 0.1 or more, more preferably 0.11 or more, even more preferably 0.15 or more, and still more preferably 0.22 or more, and also preferably 0.8 or less, more preferably 0.6 or less, and still more preferably 0.30 or less, from the viewpoint of reducing the weight of the hydraulic composition and its cleanability. In one embodiment, when component (A1) is contained as component (A), the mass ratio [(B) / (A1)] may be, for example, 0.1 or more and 0.8 or less, even more preferably 0.15 or more and 0.8 or less, even more preferably 0.11 or more and 0.6 or less, even more preferably 0.15 or more and 0.6 or less, even more preferably 0.15 or more and 0.30 or less, and still preferably 0.22 or more and 0.30 or less.

[0081] The bubble-containing hydraulic composition of the present invention may contain components (B) and (C) in such a ratio [(B) / (C)] of the content of component (B) to the content of component (C) per 100 parts by mass of hydraulic powder that is preferably 0.1 or more, more preferably 1.0 or more, even more preferably 1.4 or more, and preferably 10 or less, more preferably 4 or less, even more preferably 2 or less, and even more preferably 1.7 or less, from the viewpoint of reducing the weight of the hydraulic composition and its washability. In one embodiment, the mass ratio [(B) / (C)] may be, for example, 0.1 or more and 10 or less, more than 1.0 or more and 10 or less, more than 1.4 or more and 10 or less, more than 0.1 or more and 4 or less, more than 1.0 or more and 4 or less, more than 1.4 or more and 4 or less, more than 0.1 or more and 2 or less, more than 1.0 or more and 2 or less, more than 1.4 or more and 2 or less, and more than 1.0 or more and 1.7 or less.

[0082] The bubble-containing hydraulic composition of the present invention contains components (B) and (C) in a mass ratio [(C) / [(B)+(C)]] of 100 parts by mass of hydraulic powder, where the content of component (C) relative to the total content of component (B) and component (C) is preferably 0.1 or more, more preferably 0.25 or more, even more preferably 0.33 or more, and also preferably 0.9 or less, more preferably 0.6 or less, and even more preferably 0.5 or less, from the viewpoint of cleanability. In one embodiment, the mass ratio [(C) / [(B)+(C)]] may be, for example, 0.1 or more and 0.9 or less, further 0.25 or more and 0.9 or less, further 0.25 or more and 0.6 or less, further 0.1 or more and 0.6 or less, further 0.25 or more and 0.5 or less, and even more preferably 0.33 or more and 0.5 or less.

[0083] The bubble-containing hydraulic composition of the present invention may contain fine aggregate and / or coarse aggregate. Furthermore, the bubble-containing hydraulic composition of the present invention may contain admixtures and admixtures known in the industry.

[0084] In exemplary embodiments, the present invention provides a bubble-containing hydraulic composition comprising a hydraulic powder, water, component (A), component (B), and component (C), wherein, per 100 parts by mass of the hydraulic powder, component (A) is blended in an amount of 0.000005 parts by mass or more and 0.2 parts by mass or less, component (B) in an amount of 0.0000005 parts by mass or more and 0.06 parts by mass or less, and component (C) in an amount of 0.0000005 parts by mass or more and 0.06 parts by mass or less. In the hydraulic composition of the present invention, components (A), (B), and (C) may be blended using the foaming agent for hydraulic compositions of the present invention. That is, the present invention may be a bubble-containing hydraulic composition comprising a hydraulic powder, water, and the foaming agent for hydraulic compositions of the present invention. Components (A), (B), and (C) are the same as those described in the foaming agent for hydraulic compositions of the present invention. The hydraulic powder and aggregate are also the same as those described in the foam-containing hydraulic composition of the present invention. In the foam-containing hydraulic composition of the present invention, the amount of each component, the amount of water, their mixing ratio, and the mass percentage of the amount of water to the amount of hydraulic powder (water / hydraulic powder ratio (W / C)) can be appropriately applied by replacing the content or amount of each component with the mixing amount, within the range of the content or amount of each component and their mass ratio described in the foaming agent for hydraulic compositions of the present invention.

[0085] [Method for producing a bubble-containing hydraulic composition] As one embodiment of the method for producing a bubble-containing hydraulic composition, for example, (I) a method of producing the bubble-containing hydraulic composition of the present invention by foaming the foaming agent for hydraulic compositions of the present invention and blending it as foam with a hydraulic substance, and (II) a method of producing the bubble-containing hydraulic composition of the present invention by preparing a hydraulic composition by blending the foaming agent for hydraulic compositions of the present invention with a hydraulic substance, and then foaming the hydraulic composition.

[0086] The bubble-containing hydraulic composition of the present invention yields a hardened body by drying and curing. The specific gravity of the hardened body of the bubble-containing hydraulic composition of the present invention is preferably 0.3 or higher, more preferably 0.4 or higher, and even more preferably 0.5 or higher from the viewpoint of strength of the hardened hydraulic composition, and may be preferably 2.5 or lower, more preferably 2.0 or lower, and even more preferably 1.5 or lower from the viewpoint of ease of handling.

[0087] The cured body of the bubble-containing hydraulic composition of the present invention may contain bubbles. From the viewpoint of strength of the cured body of the bubble-containing hydraulic composition of the present invention, the average bubble diameter may be preferably 100 μm or more, more preferably 150 μm or more, and from the viewpoint of aesthetics of the cured body of the hydraulic composition, preferably 400 μm or less, more preferably 300 μm or less. The average bubble diameter is calculated by preparing a cured body of the bubble-containing hydraulic composition, arbitrarily cutting out a cross-section from the cured body, observing the cross-section with a digital microscope, and arbitrarily measuring the diameter of, for example, 100 bubble cross-sections, and calculating the average value (arithmetic mean) of these values. When measuring the diameter of the bubble cross-section, if the bubble cross-section is circular, the diameter is used; if the bubble cross-section is elliptical, the major axis is used; and if the bubble cross-section is irregular in shape, the longest part is used as the diameter. The bubble diameter of the cured body of the bubble-containing hydraulic composition is the same as the bubble diameter of the bubble-containing hydraulic composition before curing.

[0088] As one embodiment, the bubble-containing hydraulic composition of the present invention can be manufactured using the foaming agent for hydraulic compositions of the present invention. That is, as one embodiment, the present invention provides a method for manufacturing a bubble-containing hydraulic composition comprising the following steps 1 and 2. <Step 1> A step of foaming a liquid composition containing the foaming agent for hydraulic compositions of the present invention and water to obtain foam. <Step 2> A step of mixing hydraulic powder, water, and the foam obtained in step 1. In step 2, a hydraulic composition containing hydraulic powder and water may be prepared, and the hydraulic composition may be mixed with the foam obtained in step 1.

[0089] The foam-containing hydraulic composition of the present invention can be prepared by this manufacturing method. The manufacturing method for the foam-containing hydraulic composition of the present invention can appropriately apply the foaming agent for the hydraulic composition of the present invention and the embodiments described in the foam-containing hydraulic composition of the present invention. In the manufacturing method for the foam-containing hydraulic composition of the present invention, the content and mass ratio of each component described in the foam-containing hydraulic composition of the present invention can be appropriately applied by replacing the content of each component with the mixing amount.

[0090] In step 1, from the viewpoint of aerating the liquid composition, the content (effective amount) of the foaming agent for hydraulic compositions of the present invention in the liquid composition is preferably 0.01% by mass or more, more preferably 0.015% by mass or more, and preferably 5% by mass or less, and more preferably 2% by mass or less.

[0091] In step 1, the foaming ratio (bubbling ratio) of the liquid composition depends on the intended use of the hydraulic composition, but from an economic standpoint, it is preferably 5 times or more, more preferably 7 times or more, and even more preferably 10 times or more. From the viewpoint of kneadability, it is preferably 30 times or less, more preferably 25 times or less, and even more preferably 20 times or less.

[0092] In step 2, depending on the intended use of the hydraulic composition, foam is mixed with the hydraulic composition in an amount of 50% or more by volume, more preferably 100% or more by volume, and even more preferably 150% or more by volume, from the viewpoint of reducing the specific gravity of the hardened body, and 400% or less by volume, more preferably 300% or less by volume, and even more preferably 200% or less by volume, from the viewpoint of hardened body strength. In this manufacturing method, admixtures and additives known in the industry can be mixed in step 1 and / or step 2.

[0093] After step 2, the following step 3 can be performed to produce a hardened body of the bubble-containing hydraulic composition. Step 3: A step of molding and hardening the bubble-containing hydraulic composition slurry obtained in step 2.

[0094] Furthermore, the bubble-containing hydraulic composition of the present invention can be manufactured using the foaming agent for hydraulic compositions of the present invention. That is, the present invention provides a method for manufacturing a bubble-containing hydraulic composition, comprising the following steps 1' and 2'. <Step 1'> A step of obtaining a liquid composition containing the foaming agent for hydraulic compositions of the present invention and water. <Step 2'> A step of mixing hydraulic powder with the liquid composition obtained in step 1' to obtain a foaming agent-containing hydraulic composition. <Step 3'> A step of foaming the foaming agent-containing hydraulic composition obtained in the previous step to obtain a bubble-containing hydraulic composition slurry.

[0095] The foam-containing hydraulic composition of the present invention can be prepared by this manufacturing method. The manufacturing method for the foam-containing hydraulic composition of the present invention can appropriately apply the embodiments described in the foaming agent composition for hydraulic compositions and the foam-containing hydraulic composition of the present invention. In the manufacturing method for the foam-containing hydraulic composition of the present invention, the content and mass ratio of each component described in the foam-containing hydraulic composition of the present invention can be appropriately applied by replacing the content of each component with the mixing amount.

[0096] In step 1', from the viewpoint of aerating the liquid composition, the content (effective amount) of the foaming agent for hydraulic compositions of the present invention in the liquid composition is preferably 0.001% by mass or more, more preferably 0.002% by mass or more, and preferably 5% by mass or less, and more preferably 2% by mass or less.

[0097] In step 2', the hydraulic powder and the liquid composition obtained in step 1' may be mixed using mixing methods known in the industry. In this manufacturing method, admixtures and additives known in the industry may be mixed in step 1' and / or step 2'.

[0098] In step 3', the foaming agent-containing hydraulic composition obtained in the previous step may be foamed using a mixing mixer such as a pan-type forced mixer, twin-screw forced mixer, tiltable mixer, Hobart mixer, rotary mixer, Hobart mixer, W-type mixer, V-type mixer, drum-type mixer, conical screw-type mixer, ribbon mixer, tumbler mixer, double-cone mixer, mill mixer, juicer mixer, hand mixer, or Nauta mixer, preferably at a foaming ratio of 1.01 or higher, more preferably 1.03 or higher, and from the viewpoint of hardened body strength, preferably at a foaming ratio of 5 or lower, more preferably 3 or lower.

[0099] After step 3', the following step 4' can be performed to produce a hardened body of the bubble-containing hydraulic composition. Step 4': A step to mold and harden the bubble-containing hydraulic composition slurry obtained in step 3'.

[0100] The specific gravity of the cured body of the bubble-containing hydraulic composition obtained by the method for producing the bubble-containing hydraulic composition of the present invention is preferably 0.3 or higher, more preferably 0.4 or higher, and even more preferably 0.5 or higher from the viewpoint of strength of the cured body of the hydraulic composition, and may be preferably 2.5 or lower, more preferably 2.0 or lower, and even more preferably 1.5 or lower from the viewpoint of ease of handling.

[0101] The average bubble diameter of the cured body of the bubble-containing hydraulic composition obtained by the method for producing the bubble-containing hydraulic composition of the present invention is preferably 100 μm or more, more preferably 150 μm or more, from the viewpoint of the strength of the cured hydraulic composition, and preferably 400 μm or less, more preferably 300 μm or less, from the viewpoint of the aesthetic appearance of the cured hydraulic composition.

[0102] [Method for Producing a Hydraulic Composition] The present invention provides a method for preparing a hydraulic composition comprising: (i) mixing a foaming agent for a hydraulic composition, which is obtained by mixing (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter, component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter, component (B)], and (C) an organic compound with a LogP of -5.0 to less than 0 [hereinafter, component (C)], hydraulic powder, and water in a mixing tank; and (i) preparing a hydraulic composition of batch 1 from the hydraulic composition of batch 1 in the mixing tank. A method for producing a hydraulic composition is provided, comprising the steps of (ii) discharging the mixture, (iii) rinsing the inside of the mixing tank with water after the discharge, and (iv) adding the foaming agent for the hydraulic composition, hydraulic powder, and water to the mixing tank after the previous step and mixing them to prepare batch 2 of the hydraulic composition, wherein the foaming agent for the hydraulic composition is a mixture of (A) component 10% by mass or more and 50% by mass or less, (B) component 1% by mass or more and 10% by mass or less, and (C) component 1% by mass or more and 20% by mass or less.

[0103] In step (i), the matters described in the foaming agent for the hydraulic composition of the present invention, the foam-containing hydraulic composition of the present invention, and the method for producing the foam-containing hydraulic composition of the present invention can be appropriately applied as the preparation of the hydraulic composition (batch 1) of the present invention. Components (A), (B), (C), and optional components used in the method for producing the hydraulic composition of the present invention may be the same as those described in the foaming agent for the hydraulic composition of the present invention.

[0104] In step (ii), as one embodiment, the hydraulic composition (batch 1) prepared in step (i) is discharged from the mixing tank.

[0105] In step (iii), as in one embodiment, the mixing tank is rinsed with water after step (ii). The hydraulic composition (batch 1) may remain in the mixing tank. The water used in step (iii) is not particularly limited, nor is the washing method particularly limited.

[0106] In step (iv), the matters described in the foaming agent for the hydraulic composition of the present invention, the foam-containing hydraulic composition of the present invention, and the method for producing the foam-containing hydraulic composition of the present invention may be applied as appropriate to prepare the hydraulic composition (batch 2) of the present invention. Components (A), (B), (C), and optional components used in the method for producing the hydraulic composition of the present invention may be the same as those described in the foaming agent for the hydraulic composition of the present invention.

[0107] In the manufacturing of hydraulic compositions, new hydraulic compositions are continuously prepared in batches, such as the first batch, second batch, and third batch, using a single plant. In some cases, hydraulic compositions with different compositions are prepared for each batch, and in such cases, the equipment (piping, storage tanks, etc.) in the plant that comes into contact with the foaming agent may need to be cleaned after each batch. The foaming agent for hydraulic compositions of the present invention can easily be cleaned and removed from the inside of such equipment, thereby reducing the effort and cost associated with cleaning after each batch. Furthermore, since the foaming agent for the hydraulic composition of the present invention can be easily washed away, a single plant may be used to prepare, for example, a first batch of the foam-containing hydraulic composition of the present invention containing the foaming agent (for example, step (i)), discharge the composition (for example, step (ii)), wash the inside of the facility with water (for example, step (iii)), and then prepare a second batch of the foam-containing hydraulic composition of the present invention containing the foaming agent. It is expected that, for example, the amount of air in the hardened hydraulic composition will not increase or decrease between the foam-containing hydraulic composition of the first batch and the foam-containing hydraulic composition of the second batch.

[0108] In addition to the embodiments described above, the present invention discloses the following embodiments.

[0109] <1> Use of a foaming agent for hydraulic compositions in a hydraulic composition, wherein the foaming agent for hydraulic compositions contains (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having a hydrocarbon group having 8 to 30 carbon atoms [hereinafter, component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter, component (B)], and (C) an organic compound with a LogP of -5.0 or more and less than 0 [hereinafter, component (C)], wherein the foaming agent for hydraulic compositions contains 10% by mass or more and 50% by mass or less of component (A), 1% by mass or more and 10% by mass or less of component (B), and 1% by mass or more and 20% by mass or less of component (C), in the hydraulic composition.

[0110] <2> Use of the foaming agent for hydraulic compositions described in <1> above in a hydraulic composition, wherein the foaming agent for hydraulic compositions further contains water, and the water content in the foaming agent for hydraulic compositions is 40% by mass or more and 90% by mass or less.

[0111] <3> Use of the foaming agent for hydraulic compositions according to <1> or <2> above in a hydraulic composition, wherein the foaming agent for hydraulic compositions further contains water, and the water content in the foaming agent for hydraulic compositions is 40% by mass or more and 85% by mass or less.

[0112] <4> Use of a foaming agent for hydraulic compositions described in any of <1> to <3> above, wherein component (A) contains an alkyl or alkenyl sulfate ester or salt thereof having an alkyl or alkenyl group having 12 carbon atoms [hereinafter referred to as component (A1)], in a hydraulic composition.

[0113] <5> Use of the foaming agent for hydraulic compositions described in <4> above in a hydraulic composition, wherein component (A) further contains alkyl or alkenyl sulfate esters or salts thereof other than component (A2) and (A1) [hereinafter referred to as component (A2)].

[0114] <6> Use of the foaming agent for hydraulic compositions described in <5> above, wherein component (A2) is an alkyl or alkenyl sulfate ester or a salt thereof having an alkyl or alkenyl group having 8 or more carbon atoms and 30 or fewer carbon atoms, in a hydraulic composition.

[0115] <7> Use of a foaming agent for hydraulic compositions according to any of <1> to <6> above, wherein component (C) is an organic compound having one to ten hydroxyl groups, in a hydraulic composition.

[0116] <8> Use of a foaming agent for hydraulic compositions according to any of <1> to <7> above, wherein component (C) is an organic compound having two to five hydroxyl groups, in a hydraulic composition.

[0117] <9> Use of a foaming agent for hydraulic compositions according to any of <1> to <7> above, wherein component (C) is one or more selected from monohydric alcohols and polyhydric alcohols, in a hydraulic composition.

[0118] <10> Use of a foaming agent for hydraulic compositions according to any of <1> to <7> above, wherein component (C) is one or more selected from monohydric alcohols having linear or branched alkyl groups, monohydric alcohols having linear or branched alkenyl groups, dihydric alcohols having linear or branched alkenyl groups, polyalkylene glycols, and alkanolamines, in a hydraulic composition.

[0119] <11> Use of a foaming agent for hydraulic compositions described in any of <1> to <10> above, wherein component (B) is a nonionic alcohol having a LogP of 1 or more, and a LogP of 6.5 or less, further 6.0 or less, further 5.5 or less, further 5 or less, further 4 or less, and further 3.5 or less, in a hydraulic composition.

[0120] <12> Use of a foaming agent for hydraulic compositions according to any of <1> to <11> above, wherein component (B) is one or more selected from monohydric alcohols and polyhydric alcohols, in a hydraulic composition.

[0121] <13> Use of a foaming agent for hydraulic compositions according to any of <1> to <12> above, wherein component (B) is one or more selected from monohydric alcohols having linear or branched alkyl groups, monohydric alcohols having linear or branched alkenyl groups, dihydric alcohols having linear or branched alkenyl groups, aromatic monohydric alcohols, alicyclic monohydric alcohols, and polyalkylene glycol alkyl ethers, in a hydraulic composition.

[0122] <14> Use of a foaming agent for hydraulic compositions according to any of <1> to <13> above, wherein the mass ratio of the content of component (B) to the content of component (C) [(B) / (C)] is 0.1 or more and 10 or less, in a hydraulic composition.

[0123] <15> Use of a foaming agent for hydraulic compositions according to any of <1> to <14> above, wherein the mass ratio of the content of component (B) to the content of component (C) [(B) / (C)] is 1.0 or more and 2.0 or less, in a hydraulic composition.

[0124] <16> Use of a foaming agent for hydraulic compositions according to any of <1> to <15> above, wherein the mass ratio of the content of component (B) to the content of component (A) [(B) / (A)] is 0.04 or more and 0.4 or less, in a hydraulic composition.

[0125] <17> Use of a foaming agent for hydraulic compositions according to any of <1> to <16> above, wherein the mass ratio of the content of component (B) to the content of component (A) [(B) / (A)] is 0.11 or more and 0.3 or less, in a hydraulic composition.

[0126] <18> Use of a foaming agent for hydraulic compositions according to any of <1> to <17> above, wherein the mass ratio [(C) / [(B)+(C)]] of the content of component (C) to the total content of the content of component (B) and the content of component (C) is 0.1 or more and 0.9 or less, in a hydraulic composition.

[0127] <19> Use of a foaming agent for hydraulic compositions described in any of <1> to <18> above, wherein the mass ratio [(C) / [(B)+(C)]] of the content of component (C) to the total content of the content of component (B) and the content of component (C) is 0.25 or more and 0.6 or less, in a hydraulic composition.

[0128] <20> Use of a foaming agent for hydraulic compositions according to any of <1> to <19> above, in which the content of component (A) in the foaming agent for hydraulic compositions used in hydraulic compositions is 20% by mass or more, more 22% by mass or more, more 24% by mass or more, more 40% by mass or less, more 33% by mass or less, and more 29% by mass or less, in a hydraulic composition.

[0129] <21> Use of a foaming agent for hydraulic compositions according to any of <1> to <22> above, wherein the foaming agent for hydraulic compositions used in hydraulic compositions contains 2.5% by mass or more and 6% by mass or less of component (B) in the foaming agent for hydraulic compositions.

[0130] <22> Use of a foaming agent for hydraulic compositions according to any of <1> to <23> above, wherein the content of component (C) in the foaming agent for hydraulic compositions used in hydraulic compositions is 3% by mass or more, 10% by mass or less, and 5% by mass or less.

[0131] <23> A bubble-containing hydraulic composition comprising a hydraulic powder, water, (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter, component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter, component (B)], and (C) an organic compound with a LogP of -5.0 to less than 0 [hereinafter, component (C)], wherein the content of component (A) in the hydraulic composition is 0.000005 parts by mass or more and 0.2 parts by mass or less per 100 parts by mass of hydraulic powder, the content of component (B) is 0.0000005 parts by mass or more and 0.06 parts by mass or less per 100 parts by mass of hydraulic powder, and the content of component (C) is 0.0000005 parts by mass or more and 0.06 parts by mass or less per 100 parts by mass of hydraulic powder.

[0132] <24> The bubble-containing hydraulic composition according to <23> above, wherein component (A) contains an alkyl or alkenyl sulfate ester or salt thereof having an alkyl or alkenyl group having 12 carbon atoms [hereinafter, component (A1)].

[0133] <25> The bubble-containing hydraulic composition according to either <23> or <24> above, wherein component (A) further contains alkyl or alkenyl sulfate esters or salts thereof other than component (A2) (A1) [hereinafter, component (A2)].

[0134] <26> The bubble-containing hydraulic composition according to <25> above, wherein component (A2) is an alkyl or alkenyl sulfate ester having an alkyl or alkenyl group having 8 or more carbon atoms and 30 or fewer carbon atoms, or a salt thereof.

[0135] <27> The bubble-containing hydraulic composition according to any one of <23> to <26> above, wherein component (C) is an organic compound having one to ten hydroxyl groups.

[0136] <28> The bubble-containing hydraulic composition according to any one of <23> to <27> above, wherein component (C) is an organic compound having two to five hydroxyl groups.

[0137] <29> The bubble-containing hydraulic composition according to any one of <23> to <27> above, wherein component (C) is one or more selected from monohydric alcohols and polyhydric alcohols.

[0138] <30> The bubble-containing hydraulic composition according to any one of <23> to <27> above, wherein component (C) is one or more selected from monohydric alcohols having linear or branched alkyl groups, monohydric alcohols having linear or branched alkenyl groups, dihydric alcohols having linear or branched alkenyl groups, polyalkylene glycols, and alkanolamines.

[0139] <31> The bubble-containing hydraulic composition according to any one of <23> to <30> above, wherein component (B) is a nonionic alcohol having a LogP of 1 or more, and a LogP of 6.5 or less, more preferably 6.0 or less, more preferably 5.5 or less, more preferably 5 or less, more preferably 4 or less, and more preferably 3.5 or less.

[0140] <32> The bubble-containing hydraulic composition according to any one of <23> to <31> above, wherein component (B) is one or more selected from monohydric alcohols and polyhydric alcohols.

[0141] <33> The bubble-containing hydraulic composition according to any one of <23> to <32> above, wherein component (B) is one or more selected from monohydric alcohols having linear or branched alkyl groups, monohydric alcohols having linear or branched alkenyl groups, dihydric alcohols having linear or branched alkenyl groups, aromatic monohydric alcohols, alicyclic monohydric alcohols, and polyalkylene glycol alkyl ethers.

[0142] <34> The hydraulic composition according to any one of <23> to <33> above, wherein the mass ratio [(B) / (C)] of the content of component (B) to the content of component (C) is 0.1 or more, 10 or less, and 2.0 or less.

[0143] <35> The bubble-containing hydraulic composition according to any one of <23> to <34> above, wherein the mass ratio of the content of component (B) to the content of component (A) [(B) / (A)] is 0.04 or more, moreover 0.11 or more, and moreover 0.4 or less, and moreover 0.30 or less.

[0144] <36> The bubble-containing hydraulic composition according to any of <23> to <35> above, wherein the mass ratio [(C) / [(B)+(C)]] of the content of component (C) to the total content of the content of component (B) and the content of component (C) is 0.1 or more, more than 0.25 or more, and more than 0.9 or less, and more than 0.6 or less.

[0145] <37> A method for producing a foam-containing hydraulic composition comprising the following steps 1 and 2. <Step 1> A step of foaming a liquid composition containing a foaming agent for hydraulic compositions, which is obtained by mixing (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter, component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter, component (B)], and (C) an organic compound with a LogP of -5.0 or more and less than 0 [hereinafter, component (C)], wherein the foaming agent for hydraulic compositions is obtained by mixing a foaming agent for hydraulic compositions, wherein component (A) is mixed in an amount of 10% to 50% by mass, component (B) in an amount of 1% to 10% by mass, and component (C) in an amount of 1% to 20% by mass, with water to obtain foam. <Step 2> A step of mixing hydraulic powder, water, and the foam obtained in step 1.

[0146] <38> (i) A step of preparing a hydraulic composition of batch 1 by mixing a foaming agent for hydraulic compositions, which is made by mixing (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter, component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter, component (B)], and (C) an organic compound with a LogP of -5.0 to less than 0 [hereinafter, component (C)], hydraulic powder, and water in a mixing tank, and dissolving the hydraulic composition of batch 1 in the mixing tank A method for producing a hydraulic composition, comprising the steps of (ii) discharging the mixture, (iii) rinsing the inside of the mixing tank with water after the discharge, and (iv) adding the foaming agent for the hydraulic composition, hydraulic powder, and water to the mixing tank after the previous step and mixing them to prepare a hydraulic composition for batch 2, wherein the foaming agent for the hydraulic composition is a mixture of (A) component 10% by mass or more and 50% by mass or less, (B) component 1% by mass or more and 10% by mass or less, and (C) component 1% by mass or more and 20% by mass or less.

[0147] The components used in the examples and comparative examples are shown below. <Component (A)> <<Component (A1) and / or Component (A2)>> C12 / 14 / 16AS・Na: Alkyl sulfate sodium salt (molar ratio: 12 / 14 / 16 carbon atoms = 74 / 22 / 4), manufactured by Kao Corporation C12 / 14 / 16AS・TEA: Alkyl sulfate triethanolamine salt (molar ratio: 12 / 14 / 16 carbon atoms = 74 / 22 / 4), manufactured by Kao Corporation C10AS・Na: Decyl sulfate sodium salt, manufactured by Kao Corporation

[0148] <<Components (A) not included in components (A1) and (A2)>> C12 / 14AES-Na: Polyoxyethylene (average number of added moles 2) alkyl sulfate sodium salt (molar ratio: 12 / 14 carbon atoms = 74 / 26), manufactured by Kao Corporation. Fatty acid-TEA: Fatty acid triethanolamine salt (molar ratio: 12 / 14 / 16 / 18 / 18 unsaturated 1 / 18 unsaturated 2 = 13 / 3 / 6 / 1 / 70 / 7), manufactured by Kao Corporation.

[0149] <(B) Components> ・C8OH: 1-octyl alcohol (LogP: 3) (Product name "Calcol (registered trademark) 0898", manufactured by Kao Corporation) ・BnOH: Benzyl alcohol (LogP: 1.1) (Manufactured by Fujifilm Wako Pure Chemical Corporation)

[0150] <(C) Components> ・DPG: Dipropylene glycol (LogP: -1.17) (Manufactured by Fujifilm Wako Pure Chemical Corporation) ・EtOH: Ethanol (LogP: -0.31) (Manufactured by Fujifilm Wako Pure Chemical Corporation) ・1,3-BG: 1,3-Butanediol (LogP: -0.74) (Manufactured by Fujifilm Wako Pure Chemical Corporation) ・NPG: 2,2-Dimethyl-1,3-Propanediol (LogP: -0.84) (Manufactured by Fujifilm Wako Pure Chemical Corporation) ・MEA: 2-Aminoethanol (LogP: -1.31) (Manufactured by Fujifilm Wako Pure Chemical Corporation) ・DEA: Diethanolamine (LogP: -1.43) (Manufactured by Fujifilm Wako Pure Chemical Corporation) • TEA: Triethanolamine (LogP: -2.3) (Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) • 1,6-HG: 1,6-Hexanediol (LogP: -0.11) (Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.)

[0151] Example 1 and Comparative Examples 1 and 2 (1) Preparation of foaming agents for hydraulic compositions The foaming agents for hydraulic compositions shown in Tables 1 to 3 were prepared by the following method. Each raw material was added in a predetermined ratio to a 50 mL screw tube to a total of 30 g, and the mixture was stirred with a stirring bar at 1000 rpm for 30 minutes to prepare a foaming agent for hydraulic compositions with uniform and transparent properties.

[0152] (2) Preparation of hydraulic composition slurry The prepared hydraulic composition foaming agent and water were mixed in a mass ratio of 0.3 to 99.7 to prepare an aqueous solution with a concentration (in form) of hydraulic composition foaming agent of 0.3% by mass. 49.5 g of the prepared aqueous solution was added to a 1 L disposable cup, and the container was stirred by hand for 60 seconds at 2000 rpm (EUROSTAR200 control, IKA Japan Co., Ltd.) using a flat 6-blade paddle blade (FP-50, manufactured by AS ONE Corporation), and then the container was set down and stirred for another 30 seconds to obtain foam. In a 500 mL disposable cup, 60 g of calcined gypsum (Sakura brand calcined gypsum grade A, manufactured by Yoshino Gypsum Co., Ltd.), 240 g of ordinary Portland cement (two-type mixture: Taiheiyo Cement / Sumitomo Osaka Cement = 1 / 1, mass ratio), 115.5 g of tap water, and 0.48 g of water-reducing agent (methacrylic acid / ω-methoxypolyethylene glycol (23 mol) monomethacrylate = 73 / 27 mol%) were added, and the mixture was stirred for 5 seconds at setting 3 using a hand mixer (MK-H4, manufactured by Panasonic Corporation) to prepare a hydraulic composition slurry before foam addition. In a 1 L disposable cup, 49.5 g of foam was prepared, to which the entire amount of the prepared hydraulic composition slurry was added, and the mixture was kneaded in the 1 L disposable cup using the flat 6-blade paddle blade at 1150 rpm for 10 seconds to obtain a hydraulic composition slurry containing bubbles. The temperature of both the foam and the hydraulic composition slurry used for mixing was 20°C.

[0153] (3) Evaluation of the amount of washing water for the foaming agent for hydraulic compositions (Examples 1 and 2) (i) Each component shown in Tables 1 and 2 was stirred with a magnetic stirrer while heating to 40°C on a scale in a 200g beaker to the content shown in Tables 1 and 2, and the foaming agents for hydraulic compositions shown in Tables 1 and 2 were prepared. (ii) After the obtained foaming agents for hydraulic compositions were cooled to 20°C, 90g was measured out into a 100mL disposable cup (manufactured by AS ONE, model no. 1-4659-01). (iii) The 100mL cup containing the foaming agent was inverted for 20 seconds. This allowed the liquid inside the foaming agent (water mixed during preparation) to be extracted. (iv) 110 to 140mL of tap water was poured from 3cm above the 100mL cup (height 7cm) containing the extracted foaming agent for 5 seconds, so that the foaming agent would foam. (v) After pouring was complete, the poured tap water (washing water) was visually observed to ensure it was foaming. (vi) After standing for 30 seconds, the entire amount of washing water was transferred to a 3000 mL cup without rubbing the inside of the cup containing the washing water. (vii) Steps (iv) to (vi) were repeated, and in step (v), if the area of ​​foam occupying the top surface of the cup (washing water surface) had decreased to 1 / 10 or less of the top surface of the cup (washing water surface) 5 seconds after pouring the tap water, that was considered the end of the washing process. The total amount of washing water required to reach the end of the washing process is shown in Tables 1 and 2. The less washing water used, the better the washing performance.

[0154] (4) Evaluation of the amount of washing water for a hydraulic composition slurry containing a foaming agent for hydraulic compositions (Example 1) (i) Each component shown in Table 1 was stirred with a magnetic stirrer while heating to 40°C on a 200g beaker scale to the content shown in Table 1, and the foaming agents for hydraulic compositions shown in Table 1 were prepared. (ii) After the obtained foaming agents for hydraulic compositions were cooled to 20°C, 65g was measured out into a 100mL disposable cup (manufactured by AS ONE, model no. 1-4659-01). On top of the foaming agent, cement (ordinary Portland cement, (two-component mixture: Taiheiyo Cement / Sumitomo Osaka Cement = 1 / 1 mass ratio, density 3.16 g / cm³) ３(iii) Measure out 5g of the foaming agent and add it, then stir for 10 seconds using a pencil mixer (AS ONE, model 1-229-02) and a stirring rod type 2 (AS ONE, model 1-229-05). (iv) Turn the 100mL cup containing the foaming agent upside down for 20 seconds. This allows the liquid inside the foaming agent (water mixed during preparation) to be extracted. (iv) From 3cm above the 100mL cup (7cm high) containing the extracted foaming agent, pour 110-140mL of tap water for 5 seconds, so that the foaming agent would foam. (v) After pouring was complete, visually observe that the poured tap water (washing water) had foamed. (vi) After standing for 30 seconds, without rubbing the inside of the cup containing the washing water, transfer the entire amount of washing water to a 3000mL cup. (vii) Repeat steps (iv) to (vi) above, and in step (v), if, 5 seconds after pouring tap water, the area of ​​foam occupying the top surface of the cup (the surface of the washing water) has decreased to 1 / 10 or less of the top surface of the cup (the surface of the washing water), that point was considered the end of the washing process. The total amount of washing water required to reach the end of the washing process is shown in Table 1. The less washing water used, the better the washing performance.

[0155] (5) Measurement of air content in hydraulic composition slurry (Example 1) The obtained hydraulic composition slurry containing air bubbles was poured into a mold (Plamold, manufactured by Nifco Corporation) for a cylindrical specimen with a diameter of 5 cm and a height of 10 cm, and its weight was measured. The specific gravity of the hardened hydraulic composition was calculated by dividing the weight of the poured hydraulic composition slurry by the volume of the mold. In addition, the amount of air (volume %) in the hydraulic composition slurry obtained above was measured in accordance with JIS A 1128:2019. The results are shown in Table 3. Note that the amount of air in the hydraulic composition slurry is assumed to be approximately equal to the amount of air in the hardened hydraulic composition, and the value shown in Table 1 is considered to be the "amount of air in the hardened hydraulic composition".

[0156] (6) Production of a hardened body of a hydraulic composition (Example 1) The obtained hydraulic composition slurry containing air bubbles was poured into a mold (Plamold, manufactured by Nifco Corporation) with a diameter of 5 cm and a height of 10 cm, and left to stand at 20°C for 24 hours. The hardened hydraulic composition was demolded from the mold.

[0157] (7) Measurement of the average bubble diameter in the hardened hydraulic composition (Example 1) A cut was made in the 5 cm high portion of the hardened hydraulic composition to create a cross-section of the hardened body. The cross-section was photographed with a digital microscope (DSX1000, manufactured by OLYMPUS Corporation, 42x magnification), and the diameters of 100 randomly selected bubble cross-sections were measured. The average bubble diameter was calculated from the arithmetic mean of these values. When measuring the diameter of the bubble cross-section, the diameter was taken if the bubble cross-section was circular, the major axis if the bubble cross-section was elliptical, and the longest part if the bubble cross-section was irregular in shape. The results are shown in Table 3.

[0158] (8) Calculation of the number of microbubbles in the hardened hydraulic composition (Example 1) A cut was made in the 5 cm high portion of the hardened hydraulic composition to create a cross-section of the hardened body. The cross-section was photographed with a digital microscope (DSX1000, manufactured by OLYMPUS Corporation, 42x magnification), and the diameter of 100 randomly selected bubble cross-sections was measured to calculate the number of microbubbles 200 μm or less. The results are shown in Table 3.

[0159]

[0160]

[0161]

[0162] In Table 3, the composition of the foaming agent and the evaluation of the hardened hydraulic composition for Example 1-2 and Comparative Example 1-2 (lower half of the table) are shown in the same way as for Example 1-1 and Comparative Example 1-1 (upper half of the table).

[0163] In Tables 1-3, component (A) represents the amount (mass%) based on the effective amount. The values ​​in parentheses next to the amount indicate the value converted to sodium salt. In addition, the content (mass%), content (mass%), and mass ratio marked with *1 indicate the value of the (A) component used converted to sodium salt. In the foaming agents for hydraulic compositions in the table, all components other than those listed in the table are water.

[0164] Tables 1 and 2 (Various Examples) show that the foaming agent for hydraulic compositions of the present invention allows for easy cleaning not only of the container containing the foaming agent, but also of the container containing the hydraulic composition slurry containing the foaming agent. Furthermore, Table 3 shows that the foaming agent for hydraulic compositions of the present invention does not affect the specific gravity increase of the bubble-containing hydraulic composition, or even has the effect of decreasing its specific gravity. It was also confirmed that a hardened body of a bubble-containing hydraulic composition produced using the foaming agent of the present invention, i.e., a hardened body of the bubble-containing hydraulic composition of the present invention having the specific gravity and bubbles shown in Table 3, can be obtained.

[0165] Formulation Example 1 The ingredients used in Formulation Example 1 are shown below. Except for ingredient (A) below in Table 4, the same ingredients as in the Example were used.

[0166] [Ingredients Used] Except for ingredient (A) listed below in Table 4, the same ingredients as in the examples were used. <(A) ingredient> C10 / 12AS・Na: Sodium alkyl sulfate salt (molar ratio: 10 / 12 carbon atoms = 55 / 45), manufactured by Kao Corporation

[0167] The foaming agents for hydraulic compositions shown in Table 4 were prepared by the following method. Each raw material was added in the specified proportions to a total of 30 g in a 50 mL screw tube, and stirred with a stirring bar at 1000 rpm for 30 minutes to prepare a foaming agent for hydraulic compositions with uniform and transparent properties. The amounts of each component in Table 4 are mass % based on the effective amount. In the foaming agents for hydraulic compositions in Table 4, all components other than those listed in the table are water.

[0168]

[0169] In a mortar mixer (a Hobart-type mixer as described in JIS R 5201), the fine aggregate (S) (half), cement (C) and slag (BFS), and the remaining fine aggregate (S) were added in the order shown in Table 5. After dry mixing for 10 seconds, mixing water (W) containing the foaming agent for hydraulic compositions (Formulation Example 1) shown in Table 4 was added. Then, the mixture was thoroughly mixed in the mortar mixer at low speed for 90 seconds to prepare the mortars shown in Table 6 (hydraulic compositions for Formulation Examples 2-1 to 2-3). The mixing conditions for the mortars other than the foaming agent for hydraulic compositions (Formulation Example 1) were as shown in Table 5. In Tables 5 and 6, "Bat" indicates the amount of mortar used for one mixing, with 800g used as 1 Bat.

[0170]

[0171] The components used in Table 5 are as follows: W: Wakayama City tap water C: Ordinary Portland cement (2-type mixture: Taiheiyo Cement / Sumitomo Osaka Cement = 1 / 1, mass ratio) Density 3.16 g / cm³ ３ BFS: Blast furnace slag fine powder, product name "Esment 4000", manufactured by Nippon Steel Blast Furnace Cement Co., Ltd., density 2.89 g / cm³ ３ S: Joyo mountain sand density 2.55g / cm ３

[0172] In Table 5, W / C is the mass ratio of the amount of water to the amount of hydraulic powder (cement (C)), and is calculated as [amount of water (W) / amount of cement (C)] × 100 (mass%). Also, W / P is the mass ratio of the amount of water to the total amount of hydraulic powder (cement (C)) and non-hydraulic powder (slag (BFS)), and is calculated as [amount of water (W) / (amount of cement (C) + amount of slag (BFS)] × 100 (mass%).

[0173] The amount of air in the hydraulic composition slurry of the mortars shown in Table 6 (hydraulic compositions of formulation examples 2-1 to 2-3) was measured according to the method described in (3) above. The amount of air in the hydraulic composition slurry was assumed to be approximately equal to the amount of air in the hardened hydraulic composition, and the amount of air in the mortars shown in Table 6 was considered to be the "amount of air in the hardened hydraulic composition."

[0174]

[0175] Example 3 The components used in Example 3 are shown below. Except for component (A1) in Table 7, the same components as in Examples 1 and 2 were used.

[0176] [Ingredients Used] <(A) Ingredient> C12AS-Na: Sodium dodecyl sulfate, manufactured by Kao Corporation

[0177] The foaming agents for hydraulic compositions shown in Table 7 were prepared by the following method. Each raw material was added in the specified proportions to a total of 30 g in a 50 mL screw tube, and stirred with a stirring bar at 1000 rpm for 30 minutes to prepare a foaming agent for hydraulic compositions with uniform and transparent properties. The amounts of each component in Table 7 are mass % based on the effective amount. In the foaming agents for hydraulic compositions in Table 7, all components other than those listed in the table are water.

[0178] A gypsum specimen, which is a molded body, was obtained using the gypsum slurry shown in Table 7, prepared in (10) below (using the foaming agent for hydraulic compositions in Example 3-1 Example 3). The specific gravity (see (11) below) and average bubble diameter (see (12) below) were measured in this gypsum specimen. The results are shown in Table 7.

[0179] (10) Preparation of gypsum slurry A 0.3 g of the foaming agent composition for hydraulic compositions shown in Example 3 of Table 7 was mixed with 100 g of water to obtain an aqueous solution. 19 g of the prepared aqueous solution was added to a 1 L disposable cup, and the mixture was stirred by hand for 15 seconds at 2000 rpm (EUROSTAR 200 control, IKA Japan Co., Ltd.) using a flat 6-blade paddle blade (FP-50, manufactured by AS ONE Corporation), and then the container was set down and stirred for another 45 seconds to obtain foam. In a 500 mL disposable cup, 200 g of calcined gypsum (Sakura brand calcined gypsum, Grade A, manufactured by Yoshino Gypsum Co., Ltd.), 4 g of dihydrate gypsum (calcium sulfate dihydrate, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), 127 g of potassium sulfate aqueous solution (1.5 g of potassium sulfate dissolved in tap water), and 0.36 g of water-reducing agent (Mighty 150, manufactured by Kao Corporation) were added. The mixture was stirred for 5 seconds at setting 3 using a hand mixer (MK-H4, manufactured by Panasonic Corporation) to prepare the gypsum slurry before foam was added. In a 1 L disposable cup, 19 g of foam was added to the entirety of the prepared gypsum slurry. The mixture was kneaded in the 1 L disposable cup at 1150 rpm for 10 seconds using the flat 6-blade paddle blade to obtain a gypsum slurry containing air bubbles. The temperature of both the foam and the gypsum slurry used for kneading was 20°C.

[0180] (11) Measurement of specific gravity of gypsum specimen (hardened hydraulic composition) The gypsum slurry containing the obtained air bubbles was poured into a mold for a cylindrical specimen with a diameter of 5 cm and a height of 10 cm (Plamold, manufactured by Nifco Corporation) and left to stand at room temperature for more than one hour. The hardened gypsum slurry was removed from the mold for the cylindrical specimen and left to dry in a constant temperature bath at 80°C for 17 hours, after which the weight of the specimen was measured. The specific gravity of the gypsum specimen was obtained by dividing the weight of the obtained specimen by the volume of the mold. The results are shown in Table 7.

[0181] (12) Measurement of the average bubble diameter in gypsum specimens (hardened hydraulic composition) An incision was made in the gypsum specimens (hardened hydraulic composition) at a height of 5 cm to create a cross-section of the hardened body. The cross-section was observed with a digital microscope (DSX1000, manufactured by OLYMPUS Corporation, 42x magnification), and the diameters of 100 bubble cross-sections were measured in order from the smallest visible bubbles. The average bubble diameter was calculated from the arithmetic mean of these values. When measuring the diameter of the bubble cross-section, the diameter was measured if the bubble cross-section was circular, the major axis if the bubble cross-section was elliptical, and the longest part if the bubble cross-section was irregular in shape. The results are shown in Table 7.

[0182]

Claims

1. Use of a foaming agent for hydraulic compositions in a hydraulic composition, wherein the foaming agent for hydraulic compositions contains (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having a hydrocarbon group having 8 to 30 carbon atoms [hereinafter, component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter, component (B)], and (C) an organic compound with a LogP of -5.0 or more and less than 0 [hereinafter, component (C)], wherein the foaming agent for hydraulic compositions contains 10% by mass or more and 50% by mass or less of component (A), 1% by mass or more and 10% by mass or less of component (B), and 1% by mass or more and 20% by mass or less of component (C), in the hydraulic composition.

2. Use of the foaming agent for hydraulic compositions according to claim 1 in a hydraulic composition, wherein the foaming agent for hydraulic compositions further contains water, and the water content in the foaming agent for hydraulic compositions is 40% by mass or more and 90% by mass or less.

3. Use of the foaming agent for hydraulic compositions according to claim 1 or 2 in a hydraulic composition, wherein component (A) contains an alkyl or alkenyl sulfate ester or salt thereof having a C12 alkyl or alkenyl group [hereinafter, component (A1)].

4. Use of the foaming agent for hydraulic compositions according to claim 3 in a hydraulic composition, wherein component (A) further contains alkyl or alkenyl sulfate esters or salts thereof other than components (A2) and (A1).

5. Use of the foaming agent for hydraulic compositions according to any one of claims 1 to 4, wherein component (C) is an organic compound having one to ten hydroxyl groups, in a hydraulic composition.

6. Use of the foaming agent for hydraulic compositions according to any one of claims 1 to 5, wherein component (C) is one or more selected from monohydric alcohols and polyhydric alcohols, in a hydraulic composition.

7. Use of a foaming agent for hydraulic compositions according to any one of claims 1 to 6, wherein component (C) is one or more selected from monohydric alcohols having linear or branched alkyl groups, monohydric alcohols having linear or branched alkenyl groups, dihydric alcohols having linear or branched alkenyl groups, polyalkylene glycols, and alkanolamines, in a hydraulic composition.

8. Use of a foaming agent for hydraulic compositions according to any one of claims 1 to 7, wherein component (B) is a nonionic alcohol with a LogP of 1 or more and 6.5 or less, in a hydraulic composition.

9. Use of the foaming agent for hydraulic compositions according to any one of claims 1 to 8, wherein component (B) is one or more selected from monohydric alcohols and polyhydric alcohols, in a hydraulic composition.

10. Use of a foaming agent for hydraulic compositions according to any one of claims 1 to 9, wherein component (B) is one or more selected from monohydric alcohols having linear or branched alkyl groups, monohydric alcohols having linear or branched alkenyl groups, dihydric alcohols having linear or branched alkenyl groups, aromatic monohydric alcohols, alicyclic monohydric alcohols, and polyalkylene glycol alkyl ethers, in a hydraulic composition.

11. Use of a foaming agent for hydraulic compositions according to any one of claims 1 to 10, wherein the mass ratio of the content of component (B) to the content of component (C) [(B) / (C)] is 0.1 or more and 10 or less, in a hydraulic composition.

12. Use of a foaming agent for hydraulic compositions according to any one of claims 1 to 11, wherein the mass ratio of the content of component (B) to the content of component (A) [(B) / (A)] is 0.04 or more and 0.4 or less, in a hydraulic composition.

13. Use of a foaming agent for hydraulic compositions according to any one of claims 1 to 12, wherein the mass ratio [(C) / [(B)+(C)]], which is the content of component (C) to the total content of the content of component (B) and the content of component (C), is 0.1 or more and 0.9 or less, in a hydraulic composition.

14. A bubble-containing hydraulic composition comprising: hydraulic powder, water, (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter referred to as component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter referred to as component (B)], and (C) an organic compound with a LogP of -5.0 to less than 0 [hereinafter referred to as component (C)], wherein the content of component (A) in the hydraulic composition is 0.000005 parts by mass or more and 0.2 parts by mass or less per 100 parts by mass of hydraulic powder, the content of component (B) is 0.0000005 parts by mass or more and 0.06 parts by mass or less per 100 parts by mass of hydraulic powder, and the content of component (C) is 0.0000005 parts by mass or more and 0.06 parts by mass or less per 100 parts by mass of hydraulic powder.

15. A method for producing a hydraulic composition, comprising the steps of: (i) preparing a batch 1 hydraulic composition by mixing a foaming agent for a hydraulic composition, which is a mixture of (A) one or more selected from anionic surfactants, cationic surfactants, and amphoteric surfactants having hydrocarbon groups with 8 to 30 carbon atoms [hereinafter, component (A)], (B) a nonionic compound with a LogP of 0 to 7.0 [hereinafter, component (B)], and (C) an organic compound with a LogP of -5.0 to less than 0 [hereinafter, component (C)], a hydraulic powder, and water in a mixing tank; (ii) discharging the batch 1 hydraulic composition from the mixing tank; (iii) rinsing the inside of the mixing tank with water after the discharge; and (iv) adding the foaming agent for a hydraulic composition, hydraulic powder, and water to the mixing tank after the above steps and mixing to prepare a batch 2 hydraulic composition, A method for producing a hydraulic composition, wherein the foaming agent for the hydraulic composition is obtained by mixing component (A) in an amount of 10% to 50% by mass, component (B) in an amount of 1% to 10% by mass, and component (C) in an amount of 1% to 20% by mass.

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