Bubble-containing hydraulic composition

Abstract

Provided is a bubble-containing hydraulic composition comprising a hydraulic powder, water, a component (A), and a component (B), wherein the average carbon number of R1a of the component (A) is 8.0-11.0, and the mass ratio [(A) / [(A)+(B)]] of the content of the component (A) to the total content of the component (A) and the component (B) is 0.35-0.90. Component (A) is a compound represented by general formula (A1): R1aOSO3M [in the formula, R1a is a C8-18 alkyl group or alkenyl group, and M is a cation] Component (B) is at least one substance selected from α-olefin sulfonates and salts thereof.

Description

Cell-containing hydraulic composition

[0001] The present invention relates to a bubble-containing hydraulic composition, a method for producing the bubble-containing hydraulic composition, a foaming agent composition for hydraulic compositions, and use of the foaming agent composition as a foaming agent for gypsum boards.

[0002] BACKGROUND ART Air bubbles are introduced into hydraulic compositions using cement or gypsum as a hardening agent to reduce their weight. Usually, a foamed hydraulic composition containing a foaming agent composition and water is foamed to obtain foam, which is then mixed with the hydraulic composition, or with fine aggregate or various admixtures, to produce a lightweight air-bubble hydraulic composition.

[0003] Chinese Patent Publication No. 106747203 discloses a waterproof gypsum panel containing a specific mass composition of desulfurized gypsum, ordinary silicate cement, pozzolan, Class II fine coal ash, a foaming agent, a water-reducing agent, a setting retarder, and water with a pH of 7-8. Chinese Patent Publication No. 112979252 discloses a self-heating system foam concrete containing a specific weight ratio of thioaluminate cement, an animal protein foaming agent, sodium α-alkenyl sulfonate, sodium dodecyl sulfate, and sodium dodecylbenzene sulfonate. Chinese Patent Publication No. 105481288 discloses a method for producing a foaming agent specifically for gypsum, in which a foaming agent mother liquor containing a mixture of multiple anionic surfactants in a specific ratio is foamed in a high-pressure air foaming device, and then the foaming mother liquor is added to polyether-modified silicone oil to modify the activator and thickener. WO 03 / 000620 also discloses a method for creating voids in gypsum wallboard and gypsum core compositions that includes incorporating air bubbles having different relative stabilities into a gypsum slurry.

[0004] Summary of the Invention The hardened product of a bubble-containing hydraulic composition using cement or gypsum as a hardening agent can be made lighter by lowering the specific gravity due to the inclusion of bubbles, but on the other hand, the reduced weight reduces the strength. In order to prevent the decrease in strength, it is thought that the bubble diameter can be increased.

[0005] The present invention provides a bubble-containing hydraulic composition that increases the bubble diameter in the hydraulic composition, a method for producing the bubble-containing hydraulic composition, a foaming agent composition for the hydraulic composition, and use of the foaming agent composition as a foaming agent for gypsum boards.

[0006] In one embodiment, the present invention comprises a hydraulic powder, water, the following component (A) and the following component (B), wherein component (A) is R １ａ The present invention provides a bubble-containing hydraulic composition, in which the average carbon number of the compound (A) is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the component (A) and the component (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. Component (A): A compound represented by the following general formula (A1): １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0007] In another embodiment, the present invention provides a method for producing a bubble-containing hydraulic composition, comprising the following steps 1 and 2: <Step 1> The bubble-containing hydraulic composition contains the component (A) and the component (B), and the component (A) is selected from the group consisting of R １ａ and the mass ratio of the content of the (A) component to the total content of the (A) component and the (B) component, [(A) / [(A)+(B)]], is 0.35 to 0.90. <Step 2> A step of mixing the hydraulic powder, water, and the foam obtained in Step 1.

[0008] In another embodiment, the present invention provides a composition comprising the component (A) and the component (B), wherein the component (A) is R １ａ The foaming agent composition for hydraulic compositions has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of component (A) to the total content of component (A) and component (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less.

[0009] In another embodiment, the present invention provides a composition comprising the component (A) and the component (B), wherein the component (A) is R １ａ and the mass ratio of the content of the (A) component to the total content of the (A) component and the (B) component, [(A) / [(A)+(B)]], is 0.35 to 0.90.

[0010] According to the present invention, there are provided a bubble-containing hydraulic composition that increases the bubble diameter in the hydraulic composition, a method for producing the bubble-containing hydraulic composition, a foaming agent composition for the hydraulic composition, and use of the foaming agent composition as a foaming agent for gypsum board.

[0011] Modes for Carrying Out the Invention The mechanism by which the foam-containing hydraulic composition and foaming agent composition for hydraulic compositions of the present invention increase the bubble size in the hydraulic composition is unclear, but is presumed to be as follows. Conventionally, as disclosed in, for example, JP 2004-529050 A, bubble size and other properties in a hydraulic composition have been controlled by adjusting the foam performance in an aqueous system when a liquid composition containing a foaming agent composition for hydraulic compositions and water is foamed. The present inventors focused on not only foam performance in an aqueous system but also foam performance in the hydraulic composition, and discovered that, when the specific gravity of the hydraulic composition is the same, increasing the bubble diameter in the hydraulic composition can increase the strength of the hydraulic composition. The present inventors discovered that, with conventional methods that only control foam performance in an aqueous system, a certain level of foam performance, such as foaming ability and foam stability, must be met in order to introduce a certain amount of bubbles into the hydraulic composition. However, this leads to the problem of bubbles stabilizing in the hydraulic composition, preventing coalescence and making it difficult to increase the bubble size. Therefore, the present inventors have found that the above-mentioned problems can be solved by controlling the foaming performance, particularly the foaming ability, in the aqueous system and the foam coalescence rate in the hydraulic composition. Specifically, the above-mentioned problems can be solved by combining (A) an alkyl or alkenyl sulfate ester having an alkyl or alkenyl group with a specific average carbon number and (B) one or more selected from α-olefin sulfonic acids and salts thereof. R of the compound represented by the general formula (A1) as component (A) １ａBy setting the average carbon number of the component (A) within a specific range, it is possible to achieve both foam stability and large bubble diameter. Furthermore, by setting the mass ratio of the content of the component (A) to the total content of the component (A) and the component (B) [(A) / [(A)+(B)]] within a specific range, it is possible to achieve both foam stability and large bubble diameter.

[0012] In the foaming agent composition for hydraulic compositions of the present invention, components (A) and (B) have appropriate mobility in water, allowing them to adsorb to the gas-liquid interface relatively quickly during foaming, forming stable foam with strong film strength. Meanwhile, in the hydraulic composition, the change in concentration of component (A) due to the water brought in and the increase in calcium ion concentration derived from the hydraulic composition are presumably responsible for weakening the interaction between components (A) and (B), destabilizing the foam film formed by component (A) and promoting bubble coalescence. These actions are presumably responsible for increasing the stability of bubbles during foaming of the foaming agent composition for hydraulic compositions and promoting bubble coalescence in the hydraulic composition, thereby increasing the bubble diameter. This allows for both foamability in an aqueous system and foam coalescence in the hydraulic composition, resulting in both a lighter weight and increased strength of the set hydraulic composition. In this specification, "increasing the bubble diameter" may mean increasing the diameter of bubbles formed by bubble coalescence in a hydraulic composition when the hydraulic composition is mixed with foam obtained by foaming a composition having the same total content of components (A) and (B) under the same conditions. Note that the bubble-containing hydraulic composition, the method for producing a bubble-containing hydraulic composition, the foaming agent composition for hydraulic compositions, and the use of the foaming agent composition as a foaming agent for gypsum boards of the present invention are not limited to the above-mentioned mechanism of action.

[0013] [Foaming agent composition for hydraulic composition] First, the foaming agent composition for hydraulic composition that can be used for producing the bubble-containing hydraulic composition of the present invention will be described in detail. In an exemplary embodiment, the foaming agent composition for hydraulic composition of the present invention contains the following component (A) and the following component (B), and the component (A) is R １ａThe average carbon number of the compound (A) is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the component (A) and the component (B) [(A) / [(A)+(B)]] is 0.35 or more and 0.90 or less. １ａ OSO ３ M (A1) [wherein, R １ａ represents an alkyl or alkenyl group having 8 to 18 carbon atoms. M represents a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0014] <Component (A)> The component (A) is a compound represented by the general formula (A1) above. One or more types of component (A) can be used.

[0015] In general formula (A1), R １ａ is an alkyl or alkenyl group having 8 or more carbon atoms, preferably 9 or more, more preferably 10 or more, from the viewpoint of foam stability, and 18 or less, preferably 16 or less, more preferably 12 or less, from the viewpoint of increasing the bubble diameter, and an alkyl group is preferred. １ａ is an alkyl or alkenyl group having 8 or more, preferably 9 or more, more preferably 10 or more carbon atoms from the viewpoint of foam stability, and 18 or less, preferably 16 or less, more preferably 12 or less carbon atoms from the viewpoint of increasing the bubble diameter. １ａ From the viewpoint of foam stability, the average carbon number of R is 8.0 or more, preferably 9.0 or more, more preferably 9.5 or more, and from the viewpoint of increasing the bubble diameter, it is 11.0 or less, preferably 10.8 or less, more preferably 10.5 or less. １ａThe average carbon number of is a mass average carbon number calculated by multiplying the content (mass percent) of each (A) component with respect to the total content of all (A) components contained in the foaming agent composition for hydraulic compositions by the number of carbon atoms in the alkyl or alkenyl group of each (A) component, and then adding up the results. In general formula (A1), M is a cation. M may be one or more selected from alkali metals such as sodium and potassium, ammonium, and organic ammonium, and from the viewpoint of foaming ability, one or more selected from alkali metals and ammonium are preferred.

[0016] Specific examples of component (A) include one or more compounds selected from octyl sulfate, decyl sulfate, dodecyl sulfate, tetradecyl sulfate, hexadecyl sulfate, octadecyl sulfate, 2-ethylhexyl sulfate, 2-propylheptyl sulfate, and salts thereof. From the viewpoint of increasing the bubble size in the hydraulic composition and reducing the amount of component (A) to be added, it is preferable to contain one or more compounds selected from octyl sulfate, decyl sulfate, and salts thereof, more preferably one or more compounds selected from decyl sulfate and salts thereof. These compounds can increase the bubble size in the hydraulic composition. From the viewpoint of increasing the bubble size in the hydraulic composition, the content of one or more compounds selected from decyl sulfate and salts thereof in component (A) is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 97% by mass or more, and preferably 100% by mass or less, and more preferably substantially 100% by mass. Furthermore, from the viewpoint of obtaining a larger bubble diameter in the hydraulic composition, component (A) is preferably one or more compounds selected from octyl sulfate, 2-ethylhexyl sulfate, decyl sulfate, and salts thereof, and more preferably contains one or more compounds selected from octyl sulfate, 2-ethylhexyl sulfate, and salts thereof. For example, from the viewpoint of obtaining a larger bubble diameter in the hydraulic composition, the amount of one or more compounds selected from octyl sulfate, 2-ethylhexyl sulfate, and salts thereof is preferably 80% by mass or more, more preferably 90% by mass or more, and preferably 100% by mass or less, in component (A), and more preferably substantially 100% by mass.

[0017] When component (A) contains one or more selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group with 8 carbon atoms, such as octyl sulfate and 2-ethylhexyl sulfate, and salts thereof (hereinafter referred to as C8AS), and one or more selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group with 10 carbon atoms, such as decyl sulfate, and salts thereof (hereinafter referred to as C10AS), the mass ratio of the C8AS content to the C10AS content in component (A) (C8AS / C10AS) is preferably 0.4 or more, more preferably 0.6 or more, even more preferably 0.8 or more, and preferably 1.6 or less, more preferably 1.4 or less, even more preferably 1.2 or less, from the viewpoint of obtaining a larger bubble diameter in the hydraulic composition.

[0018] <Component (B)> The component (B) is at least one member selected from α-olefin sulfonic acids and salts thereof.

[0019] The carbon number of the α-olefin sulfonic acid of component (B) is preferably 8 or more, more preferably 10 or more, even more preferably 12 or more, and even more preferably 14 or more, from the viewpoint of reducing the amount added to the hydraulic composition, and is preferably 22 or less, more preferably 20 or less, even more preferably 18 or less, and even more preferably 16 or less, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition. The carbon number of the olefin sulfonic acid represents the number of carbon atoms of the olefin to which the sulfonic acid is covalently bonded. Examples of the salt of component (B) include one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts.

[0020] α-olefin sulfonic acids and salts thereof, in which the olefin has 8 to 22 carbon atoms, can be obtained by sulfonating, neutralizing, and hydrolyzing an α-olefin having 8 to 22 carbon atoms. The α-olefin refers to an olefin having a double bond at the end of the carbon chain. Sulfonation of an α-olefin produces an alkene sulfonic acid and a sultone, and the sultone is hydrolyzed under alkaline conditions to produce a hydroxyalkane sulfonic acid. The resulting product is mainly a mixture of these.

[0021] <Composition, etc.> The foaming agent composition for hydraulic compositions of the present invention contains component (A) in an amount of preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more, from the viewpoints of foam stability during foaming and increasing the bubble size in the hydraulic composition, and preferably 80% by mass or less, more preferably 60% by mass or less, even more preferably 40% by mass or less, and even more preferably 30% by mass or less, from the viewpoint of workability in addition, such as fluidity. In the present invention, the mass of component (A) is specified using a value converted to a sodium salt. Furthermore, the blending amount of each component in the composition of the present invention can be considered as the content of each component in the composition of the present invention.

[0022] In the foaming agent composition for hydraulic compositions of the present invention, the mass ratio of the content of component (A) to the total content of components other than water in the foaming agent composition is, from the viewpoint of increasing the bubble diameter, preferably 0.35 or more, more preferably 0.350 or more, even more preferably 0.38 or more, even more preferably 0.45 or more, even more preferably 0.55 or more, even more preferably 0.65 or more, and even more preferably 0.75 or more, and, from the viewpoint of foam stability during foaming, is preferably 0.90 or less, more preferably 0.85 or less, even more preferably 0.80 or less, and even more preferably 0.70 or less.

[0023] The foaming agent composition for hydraulic compositions of the present invention contains component (B) in an amount of preferably 0.5% by mass or more, more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, and even more preferably 3.0% by mass or more from the viewpoint of foam stability during foaming, and preferably 30% by mass or less, more preferably 18% by mass or less, even more preferably 15% by mass or less, and even more preferably 10% by mass or less from the viewpoint of increasing the diameter of bubbles in the hydraulic composition. In the present invention, the mass of component (B) is specified as a value converted into a sodium salt.

[0024] In the foaming agent composition for hydraulic compositions of the present invention, the mass ratio of the content of component (B) to the total content of components other than water in the foaming agent composition is preferably 0.10 or more, more preferably 0.20 or more, and even more preferably 0.35 or more, from the viewpoint of foam stability during foaming, and is preferably 0.62 or less, more preferably 0.55 or less, and even more preferably 0.45 or less, from the viewpoint of increasing the bubble diameter.

[0025] In the foaming agent composition for hydraulic compositions of the present invention, the mass ratio of the content of the (A) component to the total content of the (A) component and the (B) component [(A) / [(A)+(B)]] is 0.35 or more, preferably 0.350 or more, more preferably 0.38 or more, even more preferably 0.40 or more, still more preferably 0.50 or more, still more preferably 0.60 or more, and still more preferably 0.75 or more, from the viewpoint of enlarging the diameter of bubbles in the hydraulic composition, and is 0.90 or less, preferably 0.85 or less, more preferably 0.80 or less, and still more preferably 0.75 or less, from the viewpoint of foam stability.

[0026] In the foaming agent composition for hydraulic compositions of the present invention, the mass ratio of the total content of the components (A) and (B) to the total content of all surfactants contained in the composition [[(A) + (B)] / (total surfactants)] is, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition, preferably 0.80 or more, more preferably 0.90 or more, and preferably 1 or less, and further preferably 1.00 or less. The total content of all surfactants contained in the foaming agent composition for hydraulic compositions of the present invention may be the total content of the components (A), (B), and (C), which will be described in detail later.

[0027] In the foaming agent composition for hydraulic compositions of the present invention, the mass ratio of the total content of the components (A) and (B) to the total content of the anionic surfactants contained in the composition [[(A) + (B)] / (anionic surfactant)] is, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition, preferably 0.80 or more, more preferably 0.90 or more, and preferably 1 or less, and further preferably 1.00 or less. The total content of the anionic surfactants contained in the foaming agent composition for hydraulic compositions of the present invention may be the total content of the components (A), (B), and (C1) which will be described in detail later.

[0028] <Component (C)> The foaming agent composition for hydraulic compositions of the present invention may optionally contain one or more surfactants selected from the group consisting of surfactants other than components (A) and (B) [hereinafter referred to as component (C)].

[0029] Component (C) may be one or more selected from anionic surfactants other than components (A) and (B) (hereinafter referred to as component (C1)), nonionic surfactants, cationic surfactants, and amphoteric surfactants. From the viewpoint of increasing the bubble size in the hydraulic composition, component (C) preferably contains one or more selected from component (C1), and more preferably contains one or more selected from the group consisting of alkyl or alkenyl sulfate esters and salts thereof other than component (A) (hereinafter referred to as component (C11)), and one or more polyoxyalkylene alkyl or alkenyl ether sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 22 carbon atoms (hereinafter referred to as component (C12)). The total content of component (C1), preferably the total content of components (C11) and (C12) in component (C), is preferably 80% by mass or more, more preferably 90% by mass or more, and preferably 100% by mass or less, and more preferably substantially 100% by mass.

[0030] Component (C1) may be one or more selected from alkyl or alkenyl sulfonic acids having an alkyl or alkenyl group, alkyl or alkenyl sulfates having an alkyl or alkenyl group (excluding those corresponding to component (A)), alkyl or alkenyl benzene sulfonic acids having an alkyl or alkenyl group, polyoxyalkylene alkyl or alkenyl ether sulfates having an alkyl or alkenyl group, alkyl or alkenyl sulfosuccinic acids having one or more alkyl or alkenyl groups, α-sulfofatty acid esters having an alkyl or alkenyl group, polyoxyalkylene alkyl or alkenyl ether carboxylic acids having an alkyl or alkenyl group, internal olefin sulfonic acids, and salts thereof. Salts of component (C1) may be one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts.

[0031] The nonionic surfactant of component (C) may be one or more selected from polyoxyalkylene monoalkyl or alkenyl ethers, alkyl glycosides or alkyl polyglycosides (glycoside-type nonionic surfactants), alkyl glyceryl ethers, sorbitan-based nonionic surfactants, aliphatic alkanolamides, fatty acid monoglycerides, and sucrose fatty acid esters.

[0032] The cationic surfactant of component (C) may be one or more selected from alkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylammonium salts, benzalkonium salts, benzethonium salts, imidazolium salts, and pyridinium salts. Examples of salts of the cationic surfactant include chloride salts.

[0033] The amphoteric surfactant of component (C) may be at least one selected from alkyldimethylamine oxide, alkyldimethylaminoacetic acid betaine, alkylhydroxysulfobetaine, alkylamidopropyl betaine, and alkyl-carboxymethyl-hydroxyethylimidazolium betaine.

[0034] The foaming agent composition for hydraulic compositions of the present invention may optionally contain water. When the foaming agent composition for hydraulic compositions of the present invention contains water, the water content is preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 30% by mass or more, even more preferably 40% by mass or more, and preferably 90% by mass or less, more preferably 80% by mass or less, and even more preferably 70% by mass or less. In a foaming agent composition for hydraulic compositions containing component (A), component (B), and water, the total content of component (A) and component (B) in the composition can be, from the viewpoint of foamability, preferably 10% by mass or more, more preferably 15% by mass or more, even more preferably 20% by mass or more, even more preferably 25% by mass or more, and preferably 60% by mass or less, more preferably 50% by mass or less, and even more preferably 40% by mass or less.

[0035] The foaming agent composition for hydraulic compositions of the present invention may optionally contain a thickener, a chelating agent, a heavy metal scavenger, a rust inhibitor, a preservative, a colorant, a fragrance, an antifoaming agent, a solvent, a dispersant, a flocculant, and a water-soluble polymer, which do not fall under the category of component (A), component (B), and component (C).

[0036] The foaming agent composition for hydraulic compositions of the present invention may be a composition containing, for example, 10% by mass or less, preferably 8% by mass or less, more preferably 5% by mass or less, and 0% by mass or more of any optional components other than the components (A), (B), and (C) and water.

[0037] The foaming agent composition for hydraulic compositions of the present invention can be obtained by mixing optional components such as component (A), component (B), and component (C). During mixing, heating may be applied as appropriate to reduce the solution viscosity. In an exemplary embodiment, the foaming agent composition for hydraulic compositions of the present invention may be a foaming agent composition for hydraulic compositions comprising component (A) and component (B). In an exemplary embodiment, the foaming agent composition for hydraulic compositions of the present invention may be a foaming agent composition for hydraulic compositions comprising component (A), component (B), and water. Furthermore, the foaming agent composition for hydraulic compositions of the present invention may be a foaming agent composition for hydraulic compositions comprising any of the optional components contained in the foaming agent composition for hydraulic compositions of the present invention.

[0038] The amounts of the (A) component, the (B) component, and the optional components in the foaming agent composition for hydraulic compositions of the present invention can be applied by replacing the preferred contents in the foaming agent composition for hydraulic compositions of the present invention with the blending amounts. Furthermore, the mass ratio of the contents of each component in the foaming agent composition for hydraulic compositions of the present invention can be applied by replacing the mass ratio of the blending amounts of each component.

[0039] The foaming agent composition for hydraulic compositions of the present invention is suitable for a variety of applications, including gypsum slurries, lightweight foams (aerated foams, aerated foams), lightweight mortars (aerated mortar, aerated mortar), lightweight concrete (aerated concrete, aerated concrete), backfill fillers, core fillers, architectural concrete blocks, ALC (lightweight aerated concrete), grout materials, porous ceramics, bricks, refractories, lightweight embankments, and mortars for pumping. These foaming compositions are expected to be provided with functions such as weight reduction, improved strength, improved fluidity, thermal insulation, heat resistance, viscosity, and fluidity control by incorporating foams. Increasing the bubble diameter in the hydraulic composition can improve these functions. Among these foaming hydraulic compositions, the foaming agent composition for hydraulic compositions of the present invention is suitable for gypsum slurries, and even for gypsum boards prepared by molding gypsum slurries into plates and hardening them.

[0040] The foaming agent composition for hydraulic compositions of the present invention can be used, for example, by diluting the foaming agent composition with water to prepare a liquid composition and foaming it. From the viewpoint of foamability, the foaming agent composition for hydraulic compositions of the present invention has a concentration at the time of use of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, still more preferably 0.20% by mass or more, and even more preferably 0.30% by mass or more, and from the viewpoint of increasing the diameter of bubbles in the hydraulic composition, preferably 5.0% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.0% by mass or less, still more preferably 1.6% by mass or less, still more preferably 1.2% by mass or less, and even more preferably 1.0% by mass or less.

[0041] [Bubble-Containing Hydraulic Composition and Its Manufacturing Method] In an exemplary embodiment, a method for manufacturing a bubble-containing hydraulic composition is preferably a method in which the foaming agent composition for hydraulic compositions of the present invention is foamed and the foam is blended with a hydraulic substance to blend and lighten the composition, since this method entrains uniform bubbles. In an exemplary embodiment, the foaming agent composition for hydraulic compositions of the present invention or a mixed solution obtained by diluting it with water may be directly kneaded into a paste, slurry, mortar, or concrete containing cement or gypsum as the hydraulic substance. There is no limitation on the method for adding the foaming agent composition for hydraulic compositions of the present invention to a hydraulic composition, nor on the method for foaming the foaming agent composition for hydraulic compositions of the present invention or a mixed solution obtained by diluting it with water.

[0042] In an exemplary embodiment, the present invention comprises a hydraulic powder, water, the component (A) and the component (B), wherein the component (A) is R １ａThe present invention provides a bubble-containing hydraulic composition, in which the average carbon number of (A) is 8.0 or more and 11.0 or less, and the mass ratio of the content of component (A) to the total content of components (A) and (B) [(A) / [(A)+(B)]] is 0.35 or more and 0.90 or less. The bubble-containing hydraulic composition of the present invention can be appropriately applied with the features described for the foaming agent composition for hydraulic compositions of the present invention. Preferred aspects of components (A) and (B) in the bubble-containing hydraulic composition of the present invention are the same as those described for the foaming agent composition for hydraulic compositions of the present invention. Furthermore, the bubble-containing hydraulic composition of the present invention can optionally contain component (C) and other optional components described above. Preferred aspects of component (C) and the optional components are the same as those described for the foaming agent composition for hydraulic compositions of the present invention.

[0043] The hydraulic powder is a powder having the physical property of hardening by a hydration reaction, and examples thereof include cement, gypsum, etc., preferably gypsum. The hydraulic powder may be a powder containing gypsum. Examples of cement include ordinary portland cement, belite cement, moderate heat cement, high-early-strength cement, ultra-high-early-strength cement, and sulfate-resistant cement. Blast furnace slag cement, fly ash cement, silica fume cement, etc., to which blast furnace slag, fly ash, silica fume, stone powder (calcium carbonate powder), etc. have been added, may also be used.

[0044] When the hydraulic powder contains gypsum, the content of gypsum in the hydraulic powder is not particularly limited, but from the viewpoint of uniformity of strength, the hydraulic powder contains gypsum in an amount of preferably 80% by mass or more, more preferably 85% by mass or more, and even more preferably 90% by mass or more, and from the viewpoint of material availability, preferably 100% by mass or less. The hydraulic powder may contain gypsum in an amount of 100% by mass.

[0045] The bubble-containing hydraulic composition of the present invention has a water / hydraulic powder ratio of preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, and even more preferably 60% by mass or more from the viewpoint of slurry fluidity, and preferably 100% by mass or less, more preferably 90% by mass or less, and even more preferably 80% by mass or less from the viewpoint of hardened body strength. Here, the water / hydraulic powder ratio is the mass percentage (mass %) of water to hydraulic powder in the hydraulic composition and is calculated by (water / hydraulic powder) x 100. The water / hydraulic powder ratio is calculated based on the amount of powder having physical properties that harden upon hydration reaction. If the powder having physical properties that harden upon 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 applies to other quantitative relationships of the hydraulic composition regarding the hydraulic powder.

[0046] The bubble-containing hydraulic composition of the present invention contains component (A) in an amount of preferably 0.005 part by mass or more, more preferably 0.01 part by mass or more, and even more preferably 0.015 part by mass or more, per 100 parts by mass of hydraulic powder, from the viewpoint of reducing the specific gravity of the hardened body, and preferably 0.1 part by mass or less, more preferably 0.08 part by mass or less, and even more preferably 0.06 part by mass or less, from the viewpoint of the strength of the hardened body.

[0047] The bubble-containing hydraulic composition of the present invention contains component (B) in an amount, relative to 100 parts by mass of hydraulic powder, of preferably 0.0005 parts by mass or more, more preferably 0.0015 parts by mass or more, even more preferably 0.005 parts by mass or more, and even more preferably 0.01 parts by mass or more, from the viewpoint of reducing the specific gravity of the hardened body, and preferably 0.15 parts by mass or less, more preferably 0.10 parts by mass or less, even more preferably 0.05 parts by mass or less, and even more preferably 0.015 parts by mass or less, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition.

[0048] In the bubble-containing hydraulic composition of the present invention, the mass ratio of the content of component (A) to the total content of components (A) and (B) [(A) / [(A)+(B)]] is 0.35 or more, preferably 0.350 or more, more preferably 0.38 or more, even more preferably 0.40 or more, even more preferably 0.50 or more, even more preferably 0.60 or more, and even more preferably 0.75 or more, from the viewpoint of enlarging the bubble diameter in the hydraulic composition, and is 0.90 or less, preferably 0.85 or less, more preferably 0.80 or less, and even more preferably 0.75 or less, from the viewpoint of foam stability.

[0049] When the bubble-containing hydraulic composition of the present invention contains component (C), the amount of component (C) is preferably 0.0005 part by mass or more, more preferably 0.0010 part by mass or more, relative to 100 parts by mass of the hydraulic powder, from the viewpoint of foam stability, and is preferably 0.015 part by mass or less, more preferably 0.010 part by mass or less, and even more preferably 0.005 part by mass or less, from the viewpoint of increasing the bubble diameter.

[0050] The bubble-containing hydraulic composition of the present invention may optionally contain fine aggregate and / or coarse aggregate, and may optionally contain known admixtures or additives.

[0051] <Dispersant> The bubble-containing hydraulic composition of the present invention may optionally contain one or more dispersants selected from, for example, naphthalene polymers, polycarboxylic acid polymers, lignin sulfonic acid polymers, and melamine polymers from the viewpoint of improving the fluidity of the hydraulic slurry composition. The dispersant is preferably one or more selected from naphthalene polymers from the viewpoint of increasing the bubble size in the hydraulic composition. Furthermore, the dispersant is preferably one or more selected from polycarboxylic acid polymers from the viewpoint of improving the water reduction rate.

[0052] When the bubble-containing hydraulic composition of the present invention contains a dispersant, the dispersant is preferably contained in an amount of 0.025 part by mass or more, more preferably 0.050 part by mass or more, even more preferably 0.100 part by mass or more, and preferably 1.0 part by mass or less, more preferably 0.5 part by mass or less, even more preferably 0.3 part by mass or less, per 100 parts by mass of hydraulic powder, from the viewpoint of achieving both improved fluidity and economic efficiency.

[0053] The specific gravity of the bubble-containing hydraulic composition of the present invention is preferably 0.3 or more, more preferably 0.4 or more, and even more preferably 0.5 or more, from the viewpoint of strength, and is preferably 0.9 or less, more preferably 0.8 or less, and even more preferably 0.7 or less, from the viewpoint of handleability.

[0054] The bubble-containing hydraulic composition of the present invention contains bubbles. From the viewpoint of aesthetic appearance of the cured product, the average bubble diameter of the cured product of the bubble-containing hydraulic composition of the present invention is preferably 1,250 μm or less, more preferably 1,200 μm or less, even more preferably 1,000 μm or less, still more preferably 900 μm or less, even more preferably 800 μm or less, even more preferably 700 μm or less, even more preferably 650 μm or less, and even more preferably 550 μm or less, and from the viewpoint of improving the strength of the cured product, it is preferably 280 μm or more, more preferably 300 μm or more, even more preferably 320 μm or more, and even more preferably 350 μm or more.

[0055] The average bubble diameter of the cured product of the bubble-containing hydraulic composition of the present invention is calculated by preparing a cured product of the bubble-containing hydraulic composition, arbitrarily cutting out the cured product to prepare a cross section, observing the cross section with a digital microscope, measuring the diameters of 100 randomly selected bubble cross sections, and averaging (arithmetic mean) these values. Note that the diameter of the bubble cross section is measured as the diameter if the bubble cross section is circular, as the major axis if the bubble cross section is elliptical, or as the diameter of the longest part if the bubble cross section is irregular.

[0056] In an exemplary embodiment, the bubble-containing hydraulic composition of the present invention includes a hydraulic composition containing hydraulic powder and water, the component (A) and the component (B), and the component (A) is R １ａand a foam obtained by foaming a liquid composition containing a foaming agent composition for hydraulic compositions, wherein the average carbon number of the component (A) is from 8.0 to 11.0, and the mass ratio of the content of the component (A) to the total content of the component (A) and the component (B), [(A) / [(A)+(B)]], is from 0.35 to 0.90. The foam-containing hydraulic composition of the present invention may be a foam-containing hydraulic composition obtained by hardening a mixture of a hydraulic composition containing hydraulic powder and water and a foam obtained by foaming the liquid composition.

[0057] In the bubble-containing hydraulic composition of the present invention, the liquid composition contains, from the viewpoints of foamability and reducing the specific gravity of the set body, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, and even more preferably 0.20% by mass or more of a foaming agent composition for hydraulic compositions, and from the viewpoints of increasing the bubble size in the hydraulic composition and improving the strength of the set body, preferably 5.0% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.0% by mass or less, even more preferably 1.6% by mass or less, even more preferably 1.2% by mass or less, and even more preferably 1.0% by mass or less.

[0058] <Method for producing a bubble-containing hydraulic composition> In an exemplary embodiment, the bubble-containing hydraulic composition of the present invention can be produced using the foaming agent composition for hydraulic compositions of the present invention. In an exemplary embodiment, the present invention provides a method for producing a bubble-containing hydraulic composition, comprising the following steps 1 and 2. Step 1 may be a step of foaming a liquid composition containing the foaming agent composition for hydraulic compositions of the present invention and water to obtain a foam. <Step 1> The method comprises the following component (A) and component (B), and component (A) is selected from the group consisting of R １ａ The foaming agent composition for hydraulic compositions has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less, to obtain a foam by foaming a liquid composition containing water and the foaming agent composition for hydraulic compositions, wherein the average carbon number is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. １ａ OSO ３ M (A1) [wherein, R １ａis an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acid and salts thereof <Step 2> A step of mixing hydraulic powder, water, and the foam obtained in Step 1.

[0059] The bubble-containing hydraulic composition of the present invention can be prepared by this manufacturing method. The embodiments described for the foaming agent composition for hydraulic compositions of the present invention and the bubble-containing hydraulic composition of the present invention can be applied as appropriate to the manufacturing method for the bubble-containing hydraulic composition of the present invention. In the manufacturing method for the bubble-containing hydraulic composition of the present invention, the contents and mass ratios of each component described for the bubble-containing hydraulic composition of the present invention can be applied as appropriate by replacing the contents of each component with the mixing amounts.

[0060] In step 1, the liquid composition contains the foaming agent composition for hydraulic compositions in an amount of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, and even more preferably 0.20% by mass or more, from the viewpoints of foamability and reducing the specific gravity of the hardened body, and preferably 5.0% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.0% by mass or less, even more preferably 1.6% by mass or less, even more preferably 1.2% by mass or less, and even more preferably 1.0% by mass or less, from the viewpoints of increasing the bubble size in the hydraulic composition and improving the strength of the hardened body.

[0061] In step 1, the expansion ratio of the liquid composition varies depending on the application of the hydraulic composition, etc., but from the viewpoint of economy, it is preferably 5 times or more, more preferably 7 times or more, and even more preferably 10 times or more, and 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.

[0062] In step 2, depending on the application of the hydraulic composition, the foam is mixed with the hydraulic composition in an amount of preferably 50% by volume or more, more preferably 100% by volume or more, and even more preferably 150% by volume or more from the viewpoint of reducing the weight of the set body, and preferably 400% by volume or less, more preferably 300% by volume or less, and even more preferably 200% by volume or less from the viewpoint of the strength of the set body. In this production method, known admixtures and additives can be mixed as desired in step 1 and / or step 2.

[0063] Furthermore, from the viewpoint of improving the productivity of the bubble-containing hydraulic composition, the method for producing a bubble-containing hydraulic composition of the present invention may be a method for producing a bubble-containing hydraulic composition in which, in step 2, hydraulic powder, water, a dispersant, and the foam obtained in step 1 are mixed. From the viewpoint of improving the productivity of the bubble-containing hydraulic composition, the dispersant may be, for example, one or more selected from naphthalene-based polymers, polycarboxylic acid-based polymers, lignin sulfonic acid-based polymers, and melamine-based polymers. From the viewpoint of increasing the bubble size in the hydraulic composition, one or more selected from naphthalene-based polymers are preferred. From the viewpoint of improving the water reduction rate, the dispersant is preferably one or more selected from polycarboxylic acid-based polymers.

[0064] When a dispersant is mixed in step 2, from the viewpoint of both improving the productivity of the bubble-containing hydraulic composition and achieving economic efficiency, the dispersant is mixed in an amount of preferably 0.025 part by mass or more, more preferably 0.050 part by mass or more, even more preferably 0.100 part by mass or more, and preferably 1.0 part by mass or less, more preferably 0.5 part by mass or less, even more preferably 0.3 part by mass or less, per 100 parts by mass of the hydraulic powder.

[0065] The method for producing a bubble-containing hydraulic composition of the present invention may further include the following step 3: <Step 3> A step of forming the bubble-containing hydraulic composition slurry obtained in step 2, and hardening and / or drying the formed slurry.

[0066] In an exemplary embodiment, the method for producing a bubble-containing hydraulic composition of the present invention may be a method for producing a bubble-containing hydraulic composition, in which the hydraulic powder in Step 2 is gypsum, and Step 3 includes a molding step of placing the bubble-containing hydraulic composition slurry between base papers for a board and molding it, and a hardening step of hardening the molded body obtained in the molding step, wherein the specific gravity of the hardened body of the molded body obtained in the hardening step is 0.3 or more and 0.9 or less. From the viewpoint of strength, the specific gravity of the hardened body of the molded body is 0.3 or more, preferably 0.4 or more, more preferably 0.5 or more, and from the viewpoint of handleability, 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less.

[0067] In Step 3, the temperature for curing and / or drying is preferably 25° C. or higher, more preferably 35° C. or higher, and even more preferably 45° C. or higher, from the viewpoint of shortening the drying time, and is preferably 150° C. or lower, more preferably 120° C. or lower, and even more preferably 90° C. or lower, from the viewpoint of preventing excessive drying (drying out). In Step 3, the time for curing and / or drying the molded product of the bubble-containing hydraulic composition slurry is preferably 10 minutes or longer, more preferably 30 minutes or longer, and even more preferably 60 minutes or longer, from the viewpoint of improving the strength of the bubble-containing hydraulic composition, and is preferably 24 hours or shorter, more preferably 18 hours or shorter, and even more preferably 12 hours or shorter, from the viewpoint of improving productivity and preventing excessive drying (drying out).

[0068] [Gas bubble-containing gypsum slurry and its manufacturing method] In the gas bubble-containing hydraulic composition of the present invention, the hydraulic powder is preferably gypsum. In the present invention, a gas bubble-containing hydraulic composition in which the hydraulic powder is gypsum is also referred to as a gas bubble-containing gypsum slurry. The gas bubble-containing gypsum slurry may be a gas bubble-containing hydraulic composition in which the hydraulic powder contains gypsum. In an exemplary embodiment, the present invention is a gas bubble-containing hydraulic composition containing gypsum, water, the (A) component and the (B) component, wherein the (A) component is R １ａThe present invention provides a bubble-containing gypsum slurry, in which the average carbon number of the compound (A) is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. The bubble-containing gypsum slurry of the present invention is suitable for use in gypsum boards, which are formed by molding the bubble-containing gypsum slurry into a plate shape and hardening it.

[0069] The matters described in the foaming agent composition for hydraulic compositions of the present invention, the foaming agent composition for hydraulic compositions of the present invention, and the method for producing the foaming agent composition of the present invention can be applied to the gas bubble-containing gypsum slurry of the present invention as appropriate. Preferred aspects of the components (A) and (B) in the gas bubble-containing gypsum slurry of the present invention are the same as those described in the foaming agent composition for hydraulic compositions of the present invention. Furthermore, the gas bubble-containing gypsum slurry of the present invention can optionally contain the component (C) and other optional components described above. Preferred aspects of the component (C) and the optional components are the same as those described in the foaming agent composition for hydraulic compositions or the gas bubble-containing hydraulic composition of the present invention.

[0070] In the gas bubble-containing gypsum slurry of the present invention, the contents of the components and their mass ratios described for the gas bubble-containing hydraulic composition of the present invention can be appropriately applied by replacing the hydraulic powder with gypsum. In the hardened product of the gas bubble-containing gypsum slurry of the present invention, the ranges of the specific gravity and average gas bubble diameter are the same as those described for the gas bubble-containing hydraulic composition of the present invention.

[0071] The gypsum can be any of high-quality neutralized gypsum, phosphogypsum which is a by-product of phosphoric acid, flue gas desulfurization gypsum generated in thermal power generation, natural gypsum containing various impurities and clay, and mixtures thereof. The clay contained in gypsum is mainly composed of hydrous silicate minerals (hereinafter referred to as clay minerals) with a layered structure, and examples of clay minerals contained as fine particles in this clay include kaolin minerals (kaolinite, dickite, and nacrite), serpentine (lizardite, antigorite, and chrysotile), mica clay minerals (illite, sericite, glauconite, and celadonite), chlorite, vermiculite, and smectite (montmorillonite, beidellite, nontronite, saponite, and hectorite).

[0072] Examples of gypsum include anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum. As the raw gypsum, natural gypsum, chemical gypsum such as neutralized gypsum, or by-product gypsum can be used alone, or a mixture of two or more of these can be used. Examples of chemical gypsum include phosphate gypsum, hydrofluoric gypsum, titanic gypsum, and flue gas desulfurization gypsum. The raw gypsum may also include recycled gypsum. Examples of recycled gypsum include recycled gypsum recovered from waste gypsum board generated in-house by gypsum board manufacturers, waste gypsum board generated during new construction and demolition, and any of these may be used. The present invention can be suitably used with any of these raw gypsums, and excellent effects can be obtained even when blended in various ratios.

[0073] The bubble-containing gypsum slurry of the present invention can optionally contain additives used for gypsum boards, etc. Examples of additives include general-purpose dispersants, antifoaming agents, foam stabilizers, hardening regulators, water repellents, adhesives, and retarders. Furthermore, gypsum boards can be produced by adding reinforcing fibers such as glass fiber, carbon fiber, waste paper, and virgin pulp, or by adding lightweight aggregates such as perlite and foamed steel.

[0074] The gas bubble-containing gypsum slurry of the present invention can be produced using the foaming agent composition for hydraulic compositions of the present invention. In an exemplary embodiment, the present invention provides a method for producing a gas bubble-containing gypsum slurry, comprising the following steps 1 and 2. Step 1 may be a step of foaming a liquid composition containing the foaming agent composition for hydraulic compositions of the present invention and water to obtain a foam. <Step 1> The foaming agent composition contains the component (A) and the component (B), and the component (A) is selected from the group consisting of R １ａ and the mass ratio of the content of the (A) component to the total content of the (A) component and the (B) component, [(A) / [(A)+(B)]], is 0.35 to 0.90. <Step 2> A step of mixing the foam obtained in Step 1 with a gypsum slurry containing gypsum and water.

[0075] The gas bubble-containing gypsum slurry of the present invention can be prepared by this manufacturing method. The manufacturing method of the gas bubble-containing gypsum slurry of the present invention can appropriately apply the embodiments described for the foaming agent composition for hydraulic compositions of the present invention, the gas bubble-containing hydraulic composition and its manufacturing method of the present invention, and the gas bubble-containing gypsum slurry of the present invention. In the manufacturing method of the gas bubble-containing gypsum slurry of the present invention, the contents and mass ratios of the components described for the gas bubble-containing hydraulic composition of the present invention can be appropriately applied by replacing the hydraulic powder with gypsum and further replacing the contents of the components with the mixing amounts. The temperatures of the foam and gypsum slurry used for mixing are preferably 15°C or higher and 40°C or lower, respectively. Steps 1 and 2 can be performed in accordance with the manufacturing method of the gas bubble-containing hydraulic composition of the present invention.

[0076] The method for producing an air bubble-containing gypsum slurry may further include the following step 3. Step 3 can be carried out in accordance with the method for producing an air bubble-containing hydraulic composition of the present invention. <Step 3> A step of forming the air bubble-containing gypsum slurry obtained in step 2, and hardening and / or drying the same. The forming, hardening and drying of the air bubble-containing gypsum slurry can be carried out by known methods. For example, a gypsum board can be prepared by referring to "Gypsum Board Production" on pages 322 to 324 of "Gypsum Lime Handbook" (edited by the Gypsum Lime Society).

[0077] The method for producing a bubble-containing gypsum slurry of the present invention may also be a method for producing a gypsum board, in which Step 3 includes a molding step of placing the gypsum slurry obtained in Step 2 between base papers for board and molding it, and a hardening step of hardening the molded body obtained in the molding step, and the specific gravity of the gypsum hardened body obtained in the hardening step is 0.3 or more and 0.9 or less. From the viewpoint of strength, the specific gravity of the gypsum hardened body is 0.3 or more, preferably 0.4 or more, more preferably 0.5 or more, and from the viewpoint of handleability, it is 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less.

[0078] [Use of foaming agent composition for hydraulic composition as foaming agent for gypsum board] In an exemplary embodiment, the present invention contains the following component (A) and the following component (B), and the component (A) is R １ａThe foaming agent for gypsum boards may be a foaming agent for gypsum slurries used to form gypsum boards. Component (A): A compound represented by the following general formula (A1): R １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0079] In an exemplary embodiment, the present invention includes the component (A) and the component (B), and the component (A) is R １ａ and the mass ratio of the content of the (A) component to the total content of the (A) component and the (B) component, [(A) / [(A)+(B)]], is 0.35 to 0.90, and the foaming agent composition for hydraulic compositions is used as a foaming agent for hydraulic compositions.

[0080] In the use of the present invention, the aspects described for the foaming agent composition for hydraulic compositions of the present invention and the bubble-containing hydraulic composition of the present invention can be applied as appropriate. For example, preferred aspects of the (A), (B), and (C) components, etc., and the preferred contents of these components are the same as the preferred aspects described for the foaming agent composition for hydraulic compositions of the present invention. Furthermore, preferred aspects of the gypsum and gypsum board, and usage aspects of the foaming agent composition for hydraulic compositions can be appropriately applied to the matters described for the bubble-containing hydraulic composition and its manufacturing method of the present invention, and the bubble-containing gypsum slurry and its manufacturing method of the present invention.

[0081] The following are examples of embodiments of the present invention. The matters described in the gas bubble-containing hydraulic composition, the method for producing the gas bubble-containing hydraulic composition, the foaming agent composition for hydraulic compositions, and the use thereof of the present invention can be applied as appropriate to these embodiments.

[0082] <1> A composition containing hydraulic powder, water, the following component (A) and the following component (B), wherein component (A) is R１ａ The bubble-containing hydraulic composition has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. Component (A): A compound represented by the following general formula (A1): １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0083] <2> A composition containing hydraulic powder, water, the following component (A) and the following component (B), wherein the component (A) is R １ａ a foam-containing hydraulic composition, wherein the average carbon number of the compound (A) is 9.5 or more and 10.5 or less, the mass ratio of the content of the component (A) to the total content of the components (A) and (B) [(A) / [(A)+(B)]] is 0.75 or more and 0.85 or less, and the component (B) contains one or more compounds selected from α-olefin sulfonic acids and salts thereof, each having an olefin carbon number of 14 or more and 16 or less. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0084] <3> A hydraulic composition containing hydraulic powder and water, and the following component (A) and component (B), wherein component (A) is R １ａ The foaming agent composition for hydraulic compositions has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less, and a foam obtained by foaming a liquid composition containing the foaming agent composition for hydraulic compositions is mixed with the foam. １ａ OSO ３ M (A1) [wherein, R １ａis an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0085] <4> The bubble-containing hydraulic composition according to any one of <1> to <3>, wherein the mass ratio [(A) / [(A)+(B)]] in the bubble-containing hydraulic composition is 0.35 or more, preferably 0.350 or more, more preferably 0.38 or more, even more preferably 0.40 or more, even more preferably 0.50 or more, even more preferably 0.60 or more, even more preferably 0.75 or more, and is 0.90 or less, preferably 0.85 or less, more preferably 0.80 or less, even more preferably 0.75 or less.

[0086] <5> The bubble-containing hydraulic composition according to any one of <1> to <3>, wherein the mass ratio [(A) / [(A)+(B)]] in the bubble-containing hydraulic composition is preferably 0.350 or more and 0.90 or less, more preferably 0.38 or more and 0.85 or less, even more preferably 0.40 or more and 0.85 or less, still more preferably 0.50 or more and 0.85 or less, even more preferably 0.60 or more and 0.85 or less, even more preferably 0.75 or more and 0.85 or less, and still more preferably 0.75 or more and 0.80 or less.

[0087] <6> The bubble-containing hydraulic composition according to any one of <1> to <5>, wherein component (B) contains one or more selected from α-olefin sulfonic acids and salts thereof, each of which has an olefin carbon number of preferably 8 or more, more preferably 10 or more, even more preferably 12 or more, still more preferably 14 or more, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less, still more preferably 16 or less.

[0088] <7> The bubble-containing hydraulic composition according to any one of <1> to <5>, wherein the component (B) contains at least one selected from α-olefin sulfonic acids and salts thereof, each of which has an olefin carbon number of preferably 8 to 22, more preferably 10 to 20, even more preferably 12 to 18, and still more preferably 14 to 16.

[0089] <8> The bubble-containing hydraulic composition according to any one of <1> to <7>, wherein the hydraulic powder contains gypsum, and the content of gypsum in the hydraulic powder is preferably 80% by mass or more, more preferably 85% by mass or more, even more preferably 90% by mass or more, and preferably 100% by mass or less.

[0090] <9> The bubble-containing hydraulic composition according to any one of <1> to <7>, wherein the hydraulic powder contains gypsum, and the content of gypsum in the hydraulic powder is preferably 80% by mass or more and 100% by mass or less, more preferably 85% by mass or more and 100% by mass or less, and even more preferably 90% by mass or more and 100% by mass or less.

[0091] <10> The bubble-containing hydraulic composition according to any one of <1> to <9>, wherein the hydraulic powder is gypsum.

[0092] <11> The bubble-containing hydraulic composition according to any one of <1> to <10>, wherein the water / hydraulic powder ratio of the water and hydraulic powder contained in the bubble-containing hydraulic composition is preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, still more preferably 60% by mass or more, and preferably 100% by mass or less, more preferably 90% by mass or less, still more preferably 80% by mass or less.

[0093] <12> The bubble-containing hydraulic composition according to any one of <1> to <10>, wherein the water / hydraulic powder ratio of the water and hydraulic powder contained in the bubble-containing hydraulic composition is preferably 20% by mass or more and 100% by mass or less, more preferably 30% by mass or more and 90% by mass or less, even more preferably 40% by mass or more and 80% by mass or less, and still more preferably 60% by mass or more and 80% by mass or less.

[0094] <13> The bubble-containing hydraulic composition according to any one of <1> to <12>, further comprising one or more dispersants selected from a naphthalene-based polymer, a polycarboxylic acid-based polymer, a lignin sulfonic acid-based polymer, and a melamine-based polymer.

[0095] <14> The bubble-containing hydraulic composition according to any one of <1> to <13>, wherein the bubble-containing hydraulic composition contains component (A) in an amount of preferably 0.005 part by mass or more, more preferably 0.01 part by mass or more, even more preferably 0.015 part by mass or more, and preferably 0.1 part by mass or less, more preferably 0.08 part by mass or less, even more preferably 0.06 part by mass or less, relative to 100 parts by mass of the hydraulic powder contained in the bubble-containing hydraulic composition.

[0096] <15> The bubble-containing hydraulic composition according to any one of <1> to <13>, wherein the bubble-containing hydraulic composition contains the component (A) in an amount of preferably 0.005 parts by mass or more and 0.1 parts by mass or less, more preferably 0.01 parts by mass or more and 0.08 parts by mass or less, and even more preferably 0.015 parts by mass or more and 0.06 parts by mass or less, relative to 100 parts by mass of the hydraulic powder contained in the bubble-containing hydraulic composition.

[0097] <16> The bubble-containing hydraulic composition according to any one of <1> to <15>, wherein the bubble-containing hydraulic composition contains component (B) in an amount of preferably 0.0005 parts by mass or more, more preferably 0.0015 parts by mass or more, even more preferably 0.005 parts by mass or more, still more preferably 0.01 parts by mass or more, and preferably 0.15 parts by mass or less, more preferably 0.10 parts by mass or less, even more preferably 0.05 parts by mass or less, and still more preferably 0.015 parts by mass or less, relative to 100 parts by mass of the hydraulic powder contained in the bubble-containing hydraulic composition.

[0098] <17> The bubble-containing hydraulic composition according to any one of <1> to <15>, wherein the bubble-containing hydraulic composition contains the component (B) in an amount of preferably 0.0005 to 0.15 parts by mass, more preferably 0.0015 to 0.10 parts by mass, even more preferably 0.005 to 0.05 parts by mass, and still more preferably 0.01 to 0.015 parts by mass, relative to 100 parts by mass of the hydraulic powder contained in the bubble-containing hydraulic composition.

[0099] <18> The bubble-containing hydraulic composition according to any one of <1> to <17>, wherein the mass ratio of the total content of the components (A) and (B) to the total content of the anionic surfactants contained in the bubble-containing hydraulic composition [[(A) + (B)] / (anionic surfactant)] is preferably 0.80 or more, more preferably 0.90 or more, and preferably 1 or less, and even more preferably 1.00 or less.

[0100] <19> The bubble-containing hydraulic composition according to any one of <1> to <17>, wherein the mass ratio of the total content of the components (A) and (B) to the total content of the anionic surfactants contained in the bubble-containing hydraulic composition, [[(A) + (B)] / (anionic surfactant)], is preferably 0.80 or more and 1 or less, more preferably 0.80 or more and 1.00 or less, even more preferably 0.90 or more and 1 or less, and still more preferably 0.90 or more and 1.00 or less.

[0101] <20> A method for producing a bubble-containing hydraulic composition, comprising the following steps 1 and 2: <Step 1> The composition contains the following component (A) and the following component (B), and the component (A) is selected from the group consisting of R １ａ The foaming agent composition for hydraulic compositions has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less, to obtain a foam by foaming a liquid composition containing water and the foaming agent composition for hydraulic compositions, wherein the average carbon number is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acid and salts thereof <Step 2> A step of mixing hydraulic powder, water, and the foam obtained in Step 1.

[0102] <21> The method for producing a bubble-containing hydraulic composition according to <20>, wherein in step 1, the liquid composition contains the foaming agent composition for hydraulic compositions in an amount of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, still more preferably 0.20% by mass or more, and preferably 5.0% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.0% by mass or less, still more preferably 1.6% by mass or less, still more preferably 1.2% by mass or less, and still more preferably 1.0% by mass or less.

[0103] <22> The method for producing a bubble-containing hydraulic composition according to <20>, wherein in step 1, the liquid composition contains the foaming agent composition for hydraulic compositions in an amount of preferably 0.01% by mass or more and 5.0% by mass or less, more preferably 0.05% by mass or more and 3.0% by mass or less, even more preferably 0.10% by mass or more and 2.0% by mass or less, still more preferably 0.20% by mass or more and 1.6% by mass or less, still more preferably 0.20% by mass or more and 1.2% by mass or less, and still more preferably 0.20% by mass or more and 1.0% by mass or less.

[0104] <23> The method for producing a bubble-containing hydraulic composition according to any one of <20> to <22>, wherein in step 2, the foam is mixed in an amount of preferably 50% by volume or more, more preferably 100% by volume or more, even more preferably 150% by volume or more, and preferably 400% by volume or less, more preferably 300% by volume or less, even more preferably 200% by volume or less, based on the hydraulic composition.

[0105] <24> The method for producing a bubble-containing hydraulic composition according to any one of <20> to <22>, wherein in step 2, the foam is mixed in an amount of preferably 50% by volume to 400% by volume, more preferably 100% by volume to 300% by volume, and even more preferably 150% by volume to 200% by volume, based on the hydraulic composition.

[0106] <25> A method for producing the bubble-containing hydraulic composition according to any one of <20> to <24>, further comprising the following step 3: <Step 3> A step of forming the bubble-containing hydraulic composition slurry obtained by the step 2, and hardening and / or drying the slurry.

[0107] <26> The method for producing a bubble-containing hydraulic composition according to <25>, wherein the temperature for curing and / or drying in step 3 is preferably 25°C or higher, more preferably 35°C or higher, even more preferably 45°C or higher, and preferably 150°C or lower, more preferably 120°C or lower, even more preferably 90°C or lower.

[0108] <27> The method for producing a bubble-containing hydraulic composition according to <25>, wherein the temperature for curing and / or drying in step 3 is preferably 25°C or higher and 150°C or lower, more preferably 35°C or higher and 120°C or lower, and even more preferably 45°C or higher and 90°C or lower.

[0109] <28> The method for producing a bubble-containing hydraulic composition according to any one of <25> to <27>, wherein in step 3, the time for hardening and / or drying the formed body of the bubble-containing hydraulic composition slurry is preferably 10 minutes or more, more preferably 30 minutes or more, even more preferably 60 minutes or more, and preferably 24 hours or less, more preferably 18 hours or less, even more preferably 12 hours or less.

[0110] <29> The method for producing a bubble-containing hydraulic composition according to any one of <25> to <27>, wherein in step 3, the time for hardening and / or drying the formed body of the bubble-containing hydraulic composition slurry is preferably 10 minutes to 24 hours, more preferably 30 minutes to 18 hours, and even more preferably 60 minutes to 12 hours.

[0111] <30> A composition containing gypsum, water, the following component (A) and the following component (B), wherein the component (A) is R １ａ The bubble-containing gypsum slurry has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the component (A) and the component (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0112] <31> Method for producing bubble-containing gypsum slurry, comprising steps 1 and 2 <Step 1> The method comprises the following component (A) and component (B), wherein the component (A) is R １ａ The foaming agent composition for hydraulic compositions has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less, to obtain a foam by foaming a liquid composition containing water and the foaming agent composition for hydraulic compositions, wherein the average carbon number is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl group or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof <Step 2> A step of mixing the foam obtained in step 1 with a gypsum slurry containing gypsum and water.

[0113] <32> A composition containing the following component (A) and component (B), wherein the component (A) is R １ａ The foaming agent composition for hydraulic compositions, wherein the average carbon number of the compound (A) is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the component (A) and the component (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0114] <33> The foaming agent composition for hydraulic compositions according to <32>, which contains the component (A) in an amount of preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and preferably 80% by mass or less, more preferably 60% by mass or less, even more preferably 40% by mass or less, and even more preferably 30% by mass or less.

[0115] <34> The foaming agent composition for hydraulic compositions according to <32>, which contains the component (A) in an amount of preferably 5% by mass or more and 80% by mass or less, more preferably 10% by mass or more and 60% by mass or less, even more preferably 15% by mass or more and 40% by mass or less, and still more preferably 15% by mass or more and 30% by mass or less.

[0116] <35> The foaming agent composition for hydraulic compositions according to any one of <32> to <34>, wherein the mass ratio of the content of the component (A) in the foaming agent composition for hydraulic compositions to the total content of components other than water in the foaming agent composition is preferably 0.35 or more, more preferably 0.350 or more, even more preferably 0.38 or more, even more preferably 0.45 or more, even more preferably 0.55 or more, even more preferably 0.65 or more, and preferably 0.90 or less, more preferably 0.85 or less, even more preferably 0.80 or less, and even more preferably 0.70 or less.

[0117] <36> The foaming agent composition for hydraulic compositions according to any one of <32> to <34>, wherein the mass ratio of the content of the component (A) in the foaming agent composition for hydraulic compositions to the total content of components other than water in the foaming agent composition is preferably 0.35 or more and 0.90 or less, more preferably 0.350 or more and 0.90 or less, even more preferably 0.38 or more and 0.90 or less, even more preferably 0.38 or more and 0.85 or less, even more preferably 0.45 or more and 0.80 or less, even more preferably 0.55 or more and 0.70 or less, and even more preferably 0.65 or more and 0.70 or less.

[0118] <37> The foaming agent composition for hydraulic compositions according to any one of <32> to <36>, containing the component (B) in an amount of preferably 0.5% by mass or more, more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, still more preferably 3.0% by mass or more, and preferably 30% by mass or less, more preferably 18% by mass or less, even more preferably 15% by mass or less, and still more preferably 10% by mass or less, in the foaming agent composition for hydraulic compositions.

[0119] <38> The foaming agent composition for hydraulic compositions according to any one of <32> to <36>, wherein the foaming agent composition for hydraulic compositions contains the component (B) in an amount of preferably 0.5% by mass or more and 30% by mass or less, more preferably 1.0% by mass or more and 18% by mass or less, even more preferably 2.0% by mass or more and 15% by mass or less, and still more preferably 3.0% by mass or more and 10% by mass or less.

[0120] <39> The foaming agent composition for hydraulic compositions according to any one of <32> to <38>, wherein the mass ratio of the content of component (B) in the foaming agent composition for hydraulic compositions to the total content of components other than water in the foaming agent composition is preferably 0.10 or more, more preferably 0.20 or more, even more preferably 0.35 or more, and preferably 0.62 or less, more preferably 0.55 or less, even more preferably 0.45 or less.

[0121] <40> The foaming agent composition for hydraulic compositions according to any one of <32> to <38>, wherein the mass ratio of the content of component (B) in the foaming agent composition for hydraulic compositions to the total content of components other than water in the foaming agent composition is preferably 0.10 or more and 0.62 or less, more preferably 0.20 or more and 0.55 or less, and even more preferably 0.35 or more and 0.45 or less.

[0122] <41> The foaming agent composition for hydraulic compositions according to any one of <32> to <40>, wherein the mass ratio of the content of the component (A) to the total content of the component (A) and the component (B), [(A) / [(A)+(B)]], in the foaming agent composition for hydraulic compositions, is 0.35 or more, preferably 0.350 or more, more preferably 0.38 or more, even more preferably 0.40 or more, still more preferably 0.50 or more, even more preferably 0.60 or more, still more preferably 0.75 or more, and is 0.90 or less, preferably 0.85 or less, more preferably 0.80 or less, even more preferably 0.75 or less.

[0123] <42> The foaming agent composition for hydraulic compositions according to any one of <32> to <40>, wherein the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], in the foaming agent composition for hydraulic compositions, is preferably 0.350 or more and 0.90 or less, more preferably 0.38 or more and 0.85 or less, even more preferably 0.40 or more and 0.85 or less, still more preferably 0.50 or more and 0.85 or less, even more preferably 0.60 or more and 0.85 or less, still more preferably 0.75 or more and 0.85 or less, and still more preferably 0.75 or more and 0.80 or less.

[0124] <43> The foaming agent composition for hydraulic compositions according to any one of <32> to <42>, wherein the mass ratio of the total content of the components (A) and (B) to the total content of all surfactants contained in the foaming agent composition for hydraulic compositions, [[(A) + (B)] / (total surfactants)], is preferably 0.80 or more, more preferably 0.90 or more, and is preferably 1 or less, and further preferably 1.00 or less.

[0125] <44> The foaming agent composition for hydraulic compositions according to any one of <32> to <42>, wherein the mass ratio of the total content of the components (A) and (B) to the total content of all surfactants contained in the foaming agent composition for hydraulic compositions, [[(A) + (B)] / (total surfactants)], is preferably 0.80 or more and 1 or less, more preferably 0.80 or more and 1.00 or less, even more preferably 0.90 or more and 1 or less, and still more preferably 0.90 or more and 1.00 or less.

[0126] <45> The foaming agent composition for hydraulic compositions according to any one of <32> to <44>, wherein the mass ratio of the total content of the components (A) and (B) to the total content of the anionic surfactants contained in the foaming agent composition for hydraulic compositions, [[(A) + (B)] / (anionic surfactant)], is preferably 0.80 or more, more preferably 0.90 or more, and preferably 1 or less, further preferably 1.00 or less.

[0127] <46> The foaming agent composition for hydraulic compositions according to any one of <32> to <44>, wherein the mass ratio of the total content of the (A) component and the (B) component to the total content of the anionic surfactants contained in the foaming agent composition for hydraulic compositions, [[(A) + (B)] / (anionic surfactant)], is preferably 0.80 or more and 1 or less, more preferably 0.80 or more and 1.00 or less, even more preferably 0.90 or more and 1 or less, and still more preferably 0.90 or more and 1.00 or less.

[0128] <47> The foaming agent composition for hydraulic compositions according to any one of <32> to <46>, further containing water in an amount of preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 30% by mass or more, still more preferably 40% by mass or more, and preferably 90% by mass or less, more preferably 80% by mass or less, still more preferably 70% by mass or less.

[0129] <48> The foaming agent composition for hydraulic compositions according to any one of <32> to <46>, further comprising water in an amount of preferably 10% by mass or more and 90% by mass or less, more preferably 20% by mass or more and 80% by mass or less, even more preferably 30% by mass or more and 70% by mass or less, and still more preferably 40% by mass or more and 70% by mass or less.

[0130] <49> The foaming agent composition for hydraulic compositions according to any one of <32> to <48>, wherein the foaming agent composition has a concentration during use of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, still more preferably 0.20% by mass or more, even more preferably 0.30% by mass or more, and preferably 5.0% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.0% by mass or less, still more preferably 1.6% by mass or less, still more preferably 1.2% by mass or less, and still more preferably 1.0% by mass or less.

[0131] <50> The foaming agent composition for hydraulic compositions according to any one of <32> to <48>, wherein the foaming agent composition has a concentration during use of preferably 0.01% by mass or more and 5.0% by mass or less, more preferably 0.05% by mass or more and 3.0% by mass or less, even more preferably 0.10% by mass or more and 2.0% by mass or less, still more preferably 0.20% by mass or more and 1.6% by mass or less, even more preferably 0.30% by mass or more and 1.2% by mass or less, and still more preferably 0.30% by mass or more and 1.0% by mass or less.

[0132] <51> A composition comprising the following component (A) and component (B), wherein the component (A) is R １ａ and a mass ratio of the content of the component (A) to the total content of the component (A) and the component (B), [(A) / [(A)+(B)]], is 0.35 to 0.90, and the foaming agent composition for hydraulic compositions is used as a foaming agent for gypsum boards. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

[0133] EXAMPLES The components used in preparing the foaming agent compositions for hydraulic compositions of Examples and Comparative Examples are shown below. <Component (A)> (A1): C8AS, sodium octyl sulfate (A2): C10AS, sodium decyl sulfate (A3): C12AS, sodium lauryl sulfate (A4): C14AS, sodium tetradecyl sulfate (A5): C16AS, sodium hexadecyl sulfate (A6): C13AS, sodium alkyl sulfate having an alkyl group containing 12 to 16 carbon atoms (mass ratio: carbon numbers 12 / 14 / 16=63.5 / 23.5 / 13.0) *Examples 1-8, 1-9, 1-10 and Comparative Examples 1-11 in Table 2 were prepared using the above (A2) and (A6) in mass ratios of (A2):(A6) = 22.5:2, 22.5:4.5, 15:4.5 and 15:9, respectively. <Component (B)> (B1): C14-16 AOS, sodium α-olefin sulfonate, olefin having 14 to 16 carbon atoms <Component (B')> (B'1): C12 AES (EO3), sodium polyoxyethylene alkyl ether sulfate, alkyl group having 12 carbon atoms, average number of moles of oxyethylene groups added: 3

[0134] (1) Preparation of foaming agent compositions for hydraulic compositions The foaming agent compositions for hydraulic compositions shown in Tables 1 and 2 were prepared by the following method. Each raw material was added to a 50 mL screw tube in the proportions shown in the table so that the total amount was 50 g, and the mixture was stirred at 1,000 rpm for 30 minutes using a stirrer. Note that each component in the table is based on the active ingredient.

[0135] (2) Preparation of Gypsum Slurry The foaming agent composition for hydraulic compositions prepared in Table 1 or Table 2 and water were mixed so that the concentration of the foaming agent composition for hydraulic compositions became the concentration shown in each table, to prepare an aqueous solution of the foaming agent composition for hydraulic compositions. 20 g of the prepared aqueous solution was added to a 1 L disposable cup, and the mixture was stirred for 60 seconds at 2,000 rpm (EUROSTAR 200 control, IKA Japan Co., Ltd.) using a flat six-paddle blade (FP-50, AS ONE Corporation) to obtain a foam. 200 g of calcined gypsum, 4 g of gypsum dihydrate, 124.89 g of water, 0.75 g of potassium sulfate, and 0.36 g of dispersant (Mighty 150, manufactured by Kao Corporation) were added to a 500 mL disposable cup, and the mixture was stirred for 5 seconds at memory 3 using a hand mixer (MK-H4, manufactured by Panasonic Corporation) to prepare a gypsum slurry before adding foam. The entire amount of the prepared gypsum slurry was added to 20 g of foam prepared in a 1 L disposable cup, and the mixture was kneaded for 15 seconds at 1,150 rpm using the flat 6-paddle blade in the 1 L disposable cup to obtain a gypsum slurry containing bubbles. The water / gypsum ratio of the gypsum slurry was 62% by mass. The temperatures of the foam and gypsum slurry used for kneading were both 20 ° C.

[0136] (3) Measurement of the average bubble diameter in gypsum The gypsum slurry containing the obtained bubbles was poured into a mold for a cylindrical specimen (Plamold, manufactured by Nifco Co., Ltd.) with a diameter of 5 cm and a height of 10 cm and left to stand at room temperature for at least 1 hour. The hardened gypsum slurry (hereinafter referred to as the gypsum specimen) was demolded from the mold for the cylindrical specimen and left to stand in a thermostatic bath at 80 ° C for 17 hours to dry. A slit was made in a 5 cm high portion of the gypsum specimen to create a cross section of the gypsum specimen. The cross section was observed with a digital microscope (magnification 42x), and the diameters of 100 bubble cross sections were measured arbitrarily, prioritizing small visible bubbles, and the average bubble diameter was calculated from the arithmetic mean of these values. The diameter of the bubble cross section was measured when the bubble cross section was circular, the major axis when the bubble cross section was elliptical, and the longest part when the bubble cross section was irregular. The results are shown in Table 1 or Table 2.

[0137]

[0138]

[0139] <Notes> *1: In Tables 1 and 2, the mass-average carbon number was calculated by multiplying the content (mass percent) of each (A) component relative to the total content of all (A) components contained in the composition by the number of carbon atoms in the alkyl group of each (A) component, and then adding the results together. *2: In Tables 1 and 2, the concentration [mass%] of a foaming agent composition for hydraulic compositions is the concentration of the foaming agent composition for hydraulic compositions in an aqueous solution containing the foaming agent composition prepared to produce foam. *3: In Table 1, for Comparative Example 1-1, foam was not obtained even when the aqueous solution of the foaming agent composition for hydraulic compositions was stirred during the preparation of the gypsum slurry, so the average bubble diameter in the gypsum specimen was not evaluated and is shown as "-."

Claims

1. Contains hydraulic powder, water, the following component (A) and the following component (B), where component (A) is R １ａ The bubble-containing hydraulic composition has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. Component (A): A compound represented by the following general formula (A1): １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof 2. The bubble-containing hydraulic composition according to claim 1, wherein the mass ratio [(A) / [(A)+(B)]] is 0.40 or more and 0.85 or less.

3. The bubble-containing hydraulic composition according to claim 1 or 2, wherein component (B) comprises at least one selected from α-olefin sulfonic acids and salts thereof, the olefin having 8 to 22 carbon atoms.

4. A bubble-containing hydraulic composition according to any one of claims 1 to 3, wherein the hydraulic powder contains gypsum, and the gypsum content in the hydraulic powder is 80 mass% or more.

5. The bubble-containing hydraulic composition according to any one of claims 1 to 4, wherein the hydraulic powder is gypsum.

6. The bubble-containing hydraulic composition according to any one of claims 1 to 5, which contains one or more dispersants selected from naphthalene-based polymers, polycarboxylic acid-based polymers, lignin sulfonic acid-based polymers, and melamine-based polymers.

7. A bubble-containing hydraulic composition according to any one of claims 1 to 6, containing component (A) in an amount of 0.005 to 0.1 parts by mass per 100 parts by mass of hydraulic powder.

8. A bubble-containing hydraulic composition according to any one of claims 1 to 7, containing component (B) in an amount of 0.0005 to 0.15 parts by mass per 100 parts by mass of hydraulic powder.

9. The bubble-containing hydraulic composition according to any one of claims 1 to 8, wherein the mass ratio of the total content of the components (A) and (B) to the total content of the anionic surfactants contained in the bubble-containing hydraulic composition [[(A) + (B)] / (anionic surfactant)] is 0.80 or more and 1 or less.

10. A method for producing a bubble-containing hydraulic composition, comprising the following steps 1 and 2: <Step 1> The composition contains the following component (A) and component (B), and component (A) is R １ａ The foaming agent composition for hydraulic compositions has an average carbon number of 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less, to obtain a foam by foaming a liquid composition containing water and the foaming agent composition for hydraulic compositions, wherein the average carbon number is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the components (A) and (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acid and salts thereof <Step 2> A step of mixing hydraulic powder, water, and the foam obtained in Step 1.

11. A method for producing the bubble-containing hydraulic composition according to claim 10, further comprising the following step 3: <Step 3> A step of molding the bubble-containing hydraulic composition slurry obtained in step 2, and hardening and / or drying it.

12. Contains the following component (A) and component (B), and component (A) is R １ａ The foaming agent composition for hydraulic compositions, wherein the average carbon number of the compound (A) is 8.0 or more and 11.0 or less, and the mass ratio of the content of the component (A) to the total content of the component (A) and the component (B), [(A) / [(A)+(B)]], is 0.35 or more and 0.90 or less. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof 13. A foaming agent composition for hydraulic compositions as described in claim 12, wherein the mass ratio of the content of component (A) to the total content of components other than water in the foaming agent composition for hydraulic compositions is 0.38 or more and 0.90 or less.

14. A foaming agent composition for hydraulic compositions according to claim 12 or 13, wherein the mass ratio of the content of component (B) to the total content of components other than water in the foaming agent composition for hydraulic compositions is 0.10 or more and 0.62 or less.

15. A foaming agent composition for hydraulic compositions according to any one of claims 12 to 14, wherein the mass ratio of the total content of components (A) and (B) to the total content of all surfactants contained in the foaming agent composition for hydraulic compositions [[(A) + (B)] / (total surfactants)] is 0.80 or more and 1 or less.

16. A foaming agent composition for hydraulic compositions according to any one of claims 12 to 15, wherein the mass ratio of the total content of the components (A) and (B) to the total content of the anionic surfactants contained in the foaming agent composition for hydraulic compositions [[(A) + (B)] / (anionic surfactant)] is 0.80 or more and 1 or less.

17. Contains the following component (A) and component (B), and component (A) is R １ａ and a mass ratio of the content of the component (A) to the total content of the component (A) and the component (B), [(A) / [(A)+(B)]], is 0.35 to 0.90, and the foaming agent composition for hydraulic compositions is used as a foaming agent for gypsum boards. １ａ OSO ３ M (A1) [wherein, R １ａ is an alkyl or alkenyl group having from 8 to 18 carbon atoms. M is a cation.] Component (B): one or more selected from α-olefin sulfonic acids and salts thereof

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