Bubble-containing hydraulic composition

Abstract

Provided is a bubble-containing hydraulic composition comprising a hydraulic powder, water, the following (A1) component, the following (A2) component which is optional, and the following (B) component, wherein the mass ratio, (A1) / [(A1)+(A2)], of the content of the (A1) component to the total content of the (A1) component and the (A2) component is 0.6-1. (A1) component, one or more members selected from among alkyl- or alkenylsulfuric acid esters in which the alkyl or alkenyl groups each have 8-10 carbon atoms and among salts of these; (A2) component, one or more members selected from among surfactants which are neither the (A1) component nor the (B) component; (B) component, one or more members selected from among alkyl glyceryl ethers and alkenyl glyceryl ethers.

Description

Cell-containing hydraulic composition

[0001] The present invention relates to an aerated hydraulic composition, a method for producing an aerated hydraulic composition, a foaming agent composition for a hydraulic composition, and use thereof.

[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] WO 2018 / 070408 discloses a foaming agent composition for civil engineering construction materials, containing an anionic surfactant (A), a surfactant aid (B), and a water-insoluble or poorly water-soluble nonionic surfactant (C). WO 2023 / 085224 also discloses a foaming agent composition for hydraulic compositions, containing (A1) one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms, optionally one or more selected from surfactants excluding those corresponding to component (A1), and (B) a monohydric alcohol having from 6 to 10 carbon atoms.

[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 containing bubbles, which reduces the specific gravity. However, the reduced weight also reduces strength. Increasing the bubble diameter is considered to prevent the reduction in strength. On the other hand, in order to introduce as many bubbles as possible into the hardened product, it is preferable that the bubbles have excellent stability during foaming. However, highly stable bubbles do not easily coalesce after being mixed with the hydraulic composition, making it difficult to achieve both lighter weight and strength in the hardened product of the bubble-containing hydraulic composition.

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

[0006] In one embodiment, the present invention provides a bubble-containing hydraulic composition comprising hydraulic powder, water, the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio of the content of component (A1) to the total content of components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less: Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; Component (A2): one or more selected from surfactants other than component (A1) and component (B); and Component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers.

[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> A step of foaming a liquid composition containing water and a foaming agent composition for hydraulic compositions, which contains the component (A1), optionally the component (A2), and the component (B), wherein the mass ratio of the content of the component (A1) to the total content of the components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less. <Step 2> A step of mixing hydraulic powder, water, and the foam obtained in step 1.

[0008] In another embodiment, the present invention provides a foaming agent composition for hydraulic compositions, comprising the component (A1), optionally the component (A2), and the component (B), wherein the mass ratio of the content of the component (A1) to the total content of the components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less.

[0009] In another embodiment, the present invention provides use of the foaming agent composition for hydraulic compositions as a foaming agent for hydraulic compositions.

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

[0011] Modes for Carrying Out the Invention The mechanism by which the foaming agent composition for hydraulic compositions of the present invention increases foam stability during foaming of the foaming agent composition for hydraulic compositions and increases the bubble diameter in the hydraulic composition is unclear, but is presumed to be as follows. Conventionally, as disclosed in, for example, JP-A 2004-529050, 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 not only on foam performance in an aqueous system but also on foam performance in the hydraulic composition, and discovered that, when the specific gravity of the hydraulic composition is the same, the strength of the hydraulic composition can be increased by increasing the bubble diameter in the hydraulic composition. The present inventors have found that, in conventional methods that control only foam performance in aqueous systems, certain levels of foam performance, such as foaming ability and foam stability, must be met in order to introduce a certain amount of foam into a hydraulic composition, resulting in the problem that bubbles in the hydraulic composition become stabilized, preventing coalescence and making it difficult to increase the bubble diameter. The present inventors have found that the above-mentioned problem can be solved by controlling foam performance in aqueous systems, particularly foaming ability, and the rate of bubble coalescence in the hydraulic composition. Specifically, the above-mentioned problem is solved by combining (A1) an alkyl or alkenyl sulfate ester having a short-chain alkyl or alkenyl group, optionally (A2) a surfactant other than components (A1) and (B), and (B) an alkyl or alkenyl glyceryl ether.

[0012] It is believed that in water containing the foaming agent composition for hydraulic compositions of the present invention, component (A1) forms micelles, and that component (B), having low affinity for water, is incorporated into the micelles formed by component (A1) to form a stable foam film. Meanwhile, in the hydraulic composition, the micelles are destabilized due to changes in the concentration of component (A1) caused by the water brought in and an increase in calcium ion concentration, resulting in the release of component (B) into the system. It is believed that the released component (B) adsorbs to the gas-liquid interface, further destabilizing the foam film formed by component (A1), promoting bubble coalescence. These actions enhance foam stability during foaming of the foaming agent composition for hydraulic compositions, and promote bubble coalescence in the hydraulic composition, thereby increasing bubble diameter. This is believed to achieve both foamability in aqueous systems and foam coalescence in the hydraulic composition, resulting in both reduced weight and increased strength of the set hydraulic composition. In this specification, "enhancing foam stability during foaming" may mean either or both of increasing the foam volume immediately after foaming and maintaining foam for 5 minutes, preferably 10 minutes, after foaming when a composition having the same compositions as the (A1) and (A2) components is foamed under the same conditions. "Increasing the bubble diameter" may mean increasing the bubble diameter formed by foam coalescence in the hydraulic composition when a hydraulic composition is mixed with foam obtained by foaming a composition having the same compositions as the (A1) and (A2) components under the same conditions. It is presumed that the (A2) component forms stable complex micelles together with the (A1) component, forming a more stable foam film, thereby enhancing foam stability during foaming of the foaming agent composition for hydraulic compositions and contributing to further weight reduction of the cured hydraulic composition. On the other hand, it is presumed that the stabilization of the micelles and bubble films in the hydraulic composition suppresses the coalescence of bubbles caused by component (B), and therefore the use of components (A1) and (A2) in a specific mass ratio allows the bubble diameter in the hydraulic composition to be increased. Note that the foaming agent composition for hydraulic compositions and its use as a foaming agent for hydraulic compositions, the bubble-containing hydraulic composition, and the method for producing the bubble-containing hydraulic composition of the present invention are not limited to the above-mentioned mechanism of action.

[0013] [Foaming agent composition for hydraulic compositions] First, the foaming agent composition for hydraulic compositions that can be used in 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 compositions of the present invention contains the following component (A1), optionally the following component (A2), and the following component (B): Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; Component (A2): one or more selected from surfactants other than component (A1) and component (B); Component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers.

[0014] <Component (A1)> The component (A1) is one or more selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group with 8 to 10 carbon atoms and salts thereof. From the viewpoints of foam stability during foaming and increasing the bubble size in the hydraulic composition, the component (A1) has an alkyl or alkenyl group, preferably an alkyl group, having 8 to 10 carbon atoms, preferably 10. Examples of salts of the component (A1) include one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts.

[0015] Specific examples of component (A1) include one or more compounds selected from octyl sulfate, decyl 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 compound added to the hydraulic composition, component (A1) preferably contains 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 allow for a reduced amount of compound added to obtain a specific bubble size. From the viewpoint of increasing the bubble size in the hydraulic composition and reducing the amount of compound added to the hydraulic composition, component (A1) preferably contains 80% by mass or more of the one or more compounds selected from decyl sulfate and salts thereof, 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. From the viewpoint of obtaining a larger bubble diameter in the hydraulic composition, the component (A1) preferably contains one or more compounds selected from octyl sulfate, 2-ethylhexyl sulfate, decyl sulfate, and salts thereof, more preferably one or more compounds selected from octyl sulfate, 2-ethylhexyl sulfate, and salts thereof. From the viewpoint of obtaining a larger bubble diameter in the hydraulic composition, the content of the 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 is preferably 100% by mass or less, and more preferably substantially 100% by mass, in the component (A1).

[0016] When component (A1) contains one or more selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group of 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 of 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 (A1) (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.

[0017] <Component (A2)> The component (A2) is one or more surfactants selected from the group consisting of components (A1) and (B). The foaming agent composition for hydraulic compositions of the present invention can optionally contain the component (A2).

[0018] Examples of component (A2) include one or more selected from anionic surfactants other than component (A1), nonionic surfactants other than component (B), cationic surfactants, and amphoteric surfactants. From the viewpoint of increasing the size of bubbles in the hydraulic composition, component (A2) preferably contains one or more anionic surfactants, and more preferably contains one or more selected from the group consisting of one or more alkyl or alkenyl sulfate esters and salts thereof other than component (A1) (hereinafter referred to as component (A21)), 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 (A22)), and one or more α-olefin sulfonic acids and salts thereof in which the olefin has from 8 to 22 carbon atoms (hereinafter referred to as component (A23)). The total content of the anionic surfactants, preferably the total content of the components (A21), (A22), and (A23), in the component (A2) is preferably 80% by mass or more, more preferably 90% by mass or more, and preferably 100% by mass or less, and particularly preferably substantially 100% by mass.

[0019] Examples of anionic surfactants other than component (A1) include 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 (A1)), 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, α-olefin sulfonic acids, internal olefin sulfonic acids, and salts thereof. Examples of salts of these anionic surfactants include one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts.

[0020] Examples of the nonionic surfactant other than component (B) include one or more selected from polyoxyalkylene monoalkyl or alkenyl ethers, alkyl glycosides or alkyl polyglycosides (glycoside-type nonionic surfactants), sorbitan-based nonionic surfactants, aliphatic alkanolamides, fatty acid monoglycerides, and sucrose fatty acid esters.

[0021] The cationic surfactant may be one or more selected from alkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylammonium salts, benzalkonium salts, benzethonium salts, imidazolium salts, and pyridinium salts. The salt of the cationic surfactant may be, for example, a chloride salt.

[0022] The amphoteric surfactant may be at least one selected from alkyldimethylamine oxide, alkyldimethylaminoacetic acid betaine, alkylhydroxysulfobetaine, alkylamidopropyl betaine, and alkyl-carboxymethyl-hydroxyethylimidazolium betaine.

[0023] The foaming agent composition for hydraulic compositions of the present invention may contain component (A21) as component (A2) from the viewpoint of reducing the amount added to the hydraulic composition. When component (A21) is contained as component (A2), the content of component (A21) in component (A2) is preferably 80 mass% or more, more preferably 90 mass% or more, and preferably 100 mass% or less, with substantially 100 mass% being particularly preferred. From the viewpoint of reducing the amount added to the hydraulic composition, component (A21) preferably has an alkyl or alkenyl group, preferably an alkyl group, having 12 or more carbon atoms and preferably 18 or less, more preferably 16 or less. Examples of salts of component (A21) include one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts.

[0024] Specific examples of the component (A21) include one or more selected from lauryl sulfate, tridecyl sulfate, tetradecyl sulfate, cetyl sulfate, stearyl sulfate, oleyl sulfate, and salts thereof. From the viewpoint of solubility in water, it is preferably one or more selected from lauryl sulfate, tridecyl sulfate, tetradecyl sulfate, and salts thereof.

[0025] The foaming agent composition for hydraulic compositions of the present invention may contain component (A22) as component (A2) from the viewpoint of reducing the amount added to the hydraulic composition. When component (A22) is contained as component (A2), the content of component (A22) in component (A2) is preferably 80 mass% or more, more preferably 90 mass% or more, and preferably 100 mass% or less, with substantially 100 mass% being particularly preferred. From the viewpoint of reducing the amount added to the hydraulic composition, component (A22) preferably has an alkyl or alkenyl group, preferably an alkyl group, having 8 or more carbon atoms, more preferably 10 or more, even more preferably 12 or more, and preferably 18 or less, more preferably 16 or less, and even more preferably 14 or less. The oxyalkylene group of component (A22) is, for example, an oxyethylene group or an oxypropylene group, preferably an oxyethylene group. The average number of moles of oxyalkylene groups added is preferably 1 or more, more preferably 2 or more, from the viewpoint of solubility in water, and is preferably 10 or less, more preferably 6 or less, and even more preferably 4 or less, from the viewpoint of reducing the amount added to the hydraulic composition. When component (A22) contains two or more types of oxyalkylene groups, the different types of oxyalkylene groups may be bonded in either block or random bonds. Examples of salts of component (A22) include one or more types selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts.

[0026] Specific examples of component (A22) include polyoxyethylene octyl ether sulfate, polyoxyethylene decyl ether sulfate, polyoxyethylene lauryl ether sulfate, polyoxyethylene tridecyl ether sulfate, polyoxyethylene myristyl ether sulfate, polyoxyethylene cetyl ether sulfate, polyoxyethylene stearyl ether sulfate, polyoxypropylene octyl ether sulfate, polyoxypropylene decyl ether sulfate, polyoxypropylene lauryl ether sulfate, polyoxypropylene tridecyl ether sulfate, polyoxypropylene myristyl ether sulfate, polyoxypropylene cetyl ether sulfate, polyoxypropylene stearyl ether sulfate, polyoxyethylene polyoxypropylene octyl ether sulfate, polyoxyethylene polyoxypropylene decyl ether sulfate, and polyoxyethylene polyoxypropylene lauryl ether.

[0049] Examples of the hydroxypropyl ether sulfate include one or more selected from polyoxyethylene decyl ether sulfate, polyoxyethylene polyoxypropylene tridecyl ether sulfate, polyoxyethylene polyoxypropylene myristyl ether sulfate, polyoxyethylene polyoxypropylene cetyl ether sulfate, polyoxyethylene polyoxypropylene stearyl ether sulfate, and salts thereof. From the viewpoint of foaming properties, preferred is one or more selected from polyoxyethylene decyl ether sulfate, polyoxyethylene lauryl ether sulfate, polyoxyethylene myristyl ether sulfate, polyoxypropylene decyl ether sulfate, polyoxypropylene lauryl ether sulfate, polyoxypropylene myristyl ether sulfate, polyoxyethylene polyoxypropylene decyl ether sulfate, polyoxyethylene polyoxypropylene lauryl ether sulfate, polyoxyethylene polyoxypropylene myristyl ether sulfate, and salts thereof.

[0027] The foaming agent composition for hydraulic compositions of the present invention may contain component (A23) as component (A2) from the viewpoint of reducing the amount added to the hydraulic composition. When component (A23) is contained as component (A2), the content of component (A23) in component (A2) is preferably 80 mass% or more, more preferably 90 mass% or more, and preferably 100 mass% or less, with substantially 100 mass% being particularly preferred. From the viewpoint of reducing the amount added to the hydraulic composition, the carbon number of the α-olefin sulfonic acid of component (A23) is preferably 8 or more, more preferably 10 or more, even more preferably 12 or more, even more preferably 14 or more, and preferably 20 or less, more preferably 18 or less, and even more preferably 16 or less. The carbon number of the olefin sulfonic acid refers to the carbon number of the olefin to which the sulfonic acid is covalently bonded. Examples of salts of component (A23) include one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts.

[0028] 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.

[0029] From the viewpoint of reducing the amount added to the hydraulic composition, the component (A2) is preferably a surfactant having an alkyl or alkenyl group having from 8 to 22 carbon atoms (excluding those corresponding to the components (A1) and (B)), and examples thereof include alkyl or alkenyl sulfonic acids having an alkyl or alkenyl group having from 8 to 22 carbon atoms, alkyl or alkenyl sulfates having an alkyl or alkenyl group having from 11 to 22 carbon atoms, alkyl or alkenyl benzene sulfonic acids having an alkyl or alkenyl group having from 8 to 22 carbon atoms, polyoxyethylene alkyl or alkenyl alkyl groups having from 8 to 22 carbon atoms, and the like. More preferred is one or more selected from the group consisting of alkylene alkyl or alkenyl ether sulfate esters, alkyl or alkenyl sulfosuccinic acids having one or more alkyl or alkenyl groups having from 8 to 22 carbon atoms, α-sulfofatty acid methyl esters having an alkyl or alkenyl group having from 8 to 22 carbon atoms, polyoxyalkylene alkyl or alkenyl ether carboxylic acids having an alkyl or alkenyl group having from 8 to 22 carbon atoms, α-olefin sulfonic acids in which the olefin has from 8 to 22 carbon atoms, internal olefin sulfonic acids in which the olefin has from 8 to 22 carbon atoms, and salts thereof. From the viewpoint of obtaining a larger bubble diameter in the hydraulic composition, the component (A2) is more preferably at least one selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group having from 12 to 18 carbon atoms, polyoxyalkylene alkyl or alkenyl ether sulfate esters having an alkyl or alkenyl group having from 12 to 18 carbon atoms, α-olefin sulfonic acids in which the olefin has from 12 to 18 carbon atoms, internal olefin sulfonic acids in which the olefin has from 12 to 18 carbon atoms, and salts thereof.

[0030] <Component (B)> The component (B) is one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers. One or more types of component (B) can be used. The component (B) can be one or more selected from alkyl glyceryl ethers having an alkyl group with from 5 to 22 carbon atoms and alkenyl glyceryl ethers having an alkenyl group with from 5 to 22 carbon atoms. From the viewpoints of increasing the bubble size in the hydraulic composition and reducing the weight of the hydraulic composition, the component (B) is preferably an alkyl glyceryl ether having an alkyl group with from 5 to 22 carbon atoms. Component (B) may be one or more selected from monoalkyl glyceryl ethers having an alkyl group having from 5 to 22 carbon atoms and monoalkenyl glyceryl ethers having an alkenyl group having from 5 to 22 carbon atoms, and from the viewpoint of increasing the bubble size in the hydraulic composition and reducing the weight of the hydraulic composition, monoalkyl glyceryl ethers having an alkyl group having from 5 to 22 carbon atoms are preferred, monoalkyl glyceryl ethers having an alkyl group having from 6 to 12 carbon atoms are more preferred, and monoalkyl glyceryl ethers having an alkyl group having from 8 to 10 carbon atoms are even more preferred. The alkyl group or alkenyl group of component (B) may be linear or branched, and from the viewpoint of increasing the bubble size in the hydraulic composition, branched chains are preferred. From the viewpoint of increasing the diameter of bubbles in the hydraulic composition and reducing the weight of the hydraulic composition, the component (B) is preferably at least one selected from alkyl glyceryl ethers having a branched alkyl group with from 5 to 22 carbon atoms and alkenyl glyceryl ethers having a branched alkenyl group with from 5 to 22 carbon atoms, more preferably alkyl glyceryl ethers having a branched alkyl group with from 5 to 22 carbon atoms, even more preferably alkyl glyceryl ethers having a branched alkyl group with from 6 to 12 carbon atoms, and even more preferably alkyl glyceryl ethers having a branched alkyl group with from 8 to 10 carbon atoms.

[0031] The alkyl group or alkenyl group of component (B) preferably has 5 or more carbon atoms, more preferably 6 or more carbon atoms, and even more preferably 8 or more carbon atoms, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition. From the same viewpoint, the alkyl group or alkenyl group preferably has 22 or less carbon atoms, more preferably 18 or less carbon atoms, more preferably 12 or less carbon atoms, and even more preferably 10 or less carbon atoms.

[0032] From the viewpoint of increasing the diameter of bubbles in the hydraulic composition, component (B) is preferably one or more selected from hexyl glyceryl ether, cyclohexyl glyceryl ether, octyl glyceryl ether, 2-ethylhexyl glyceryl ether, 2-propylheptyl glyceryl ether, isodecyl glyceryl ether, isostearyl glyceryl ether, and oleyl glyceryl ether, more preferably one or more selected from 2-ethylhexyl glyceryl ether, 2-propylheptyl glyceryl ether, and isodecyl glyceryl ether, and even more preferably 2-ethylhexyl glyceryl ether.

[0033] Specific examples of preferred combinations of the component (A1) and the component (B), or preferred combinations of the component (A1), the component (A2), and the component (B), include the following combinations: In the following combinations, the component (A1) and the component (A2) may be salts. (A1) octyl sulfate and (B) 2-ethylhexylglyceryl ether; (A1) octyl sulfate, (A21) lauryl sulfate and (B) 2-ethylhexylglyceryl ether; (A1) octyl sulfate, (A22) polyoxyethylene lauryl ether sulfate and (B) 2-ethylhexylglyceryl ether; (A1) octyl sulfate, (A23) α-olefin sulfonic acid having from 14 to 16 carbon atoms and (B) 2-ethylhexylglyceryl ether; (A1) decyl sulfate and (B) 2-ethylhexylglyceryl ether; (A1) decyl sulfate, (A21) lauryl sulfate and (B) 2-ethylhexylglyceryl ether; (A1) decyl sulfate, (A22) polyoxyethylene lauryl ether sulfate and (B) 2-ethylhexylglyceryl ether; (A1) decyl sulfate ester, (A23) α-olefin sulfonic acid having from 14 to 16 carbon atoms, and (B) 2-ethylhexyl glyceryl ether

[0034] That is, from the viewpoint of foam stability during foaming and enlarging the bubbles in the hydraulic composition, the foaming agent composition for hydraulic compositions of the present invention contains (A1) octyl sulfate or a salt thereof or decyl sulfate or a salt thereof, component (B), and optionally component (A2), wherein component (A2) is any one selected from the group consisting of (A21) lauryl sulfate or a salt thereof, (A22) polyoxyethylene lauryl ether sulfate or a salt thereof, and (A23) α-olefin sulfonic acid or a salt thereof having from 14 to 16 carbon atoms, and component (B) is preferably 2-ethylhexyl glyceryl ether. Moreover, from the viewpoint of foam stability during foaming and enlarging the bubbles in the hydraulic composition, the foaming agent composition for hydraulic compositions of the present invention contains (A1) decyl sulfate or a salt thereof, component (B), and optionally component (A2), wherein component (A2) is any one selected from the group consisting of (A21) lauryl sulfate or a salt thereof, (A22) polyoxyethylene lauryl ether sulfate or a salt thereof, and (A23) α-olefin sulfonic acid or a salt thereof having from 14 to 16 carbon atoms, and component (B) is preferably 2-ethylhexyl glyceryl ether.

[0035] <Composition, etc.> The foaming agent composition for hydraulic compositions of the present invention contains the component (A1) 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 enlarging the bubbles 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 viewpoints of workability in addition, such as fluidity. In the present invention, the mass of the component (A1) 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.

[0036] When the foaming agent composition for hydraulic compositions of the present invention contains component (A2), the foaming agent composition for hydraulic compositions of the present invention contains component (A2) 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 15% by mass or less, more preferably 10% by mass or less from the viewpoint of increasing the bubble size in the hydraulic composition. In the present invention, the mass of the anionic surfactant contained in component (A2) is expressed as a value converted into a sodium salt. Furthermore, the mass of the cationic surfactant contained in component (A2) is expressed as a value converted into a chloride salt.

[0037] In the foaming agent composition for hydraulic compositions of the present invention, the mass ratio of the content of the (A1) component to the total content of the (A1) component and the (A2) component [(A1) / [(A1)+(A2)]] is 0.6 or more, preferably 0.7 or more, more preferably 0.9 or more, and even more preferably 0.95 or more, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition, and is 1 or less, preferably 1.0 or less, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition.

[0038] The foaming agent composition for hydraulic compositions of the present invention contains component (B) in an amount of preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, even more preferably 1.5% by mass or more, and even more preferably 2% by mass or more, from the viewpoints of foam stability during foaming and increasing the size of bubbles in the hydraulic composition, and the workability of addition, such as increasing the size of bubbles in the hydraulic composition and improving fluidity, etc., preferably 30% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less.

[0039] In the foaming agent composition for hydraulic compositions of the present invention, the mass ratio of the content of the component (B) to the content of the component (A1) [(B) / (A1)] is preferably 0.01 or more, more preferably 0.05 or more, and even more preferably 0.10 or more, from the viewpoints of foam stabilization during foaming, enlarging the bubbles in the hydraulic composition, and reducing the weight of the hydraulic composition; and from the viewpoints of enlarging the bubbles in the hydraulic composition and making the bubbles uniform in the hydraulic composition, it is preferably 1.0 or less, more preferably 0.5 or less, even more preferably 0.4 or less, and even more preferably 0.3 or less.

[0040] In the foaming agent composition for hydraulic compositions of the present invention, the mass ratio of the content of the (B) component to the total content of the (A1) component and the (A2) component [(B) / [(A1)+(A2)]] is preferably 0.01 or more, more preferably 0.05 or more, and even more preferably 0.10 or more, from the viewpoints of foam stabilization during foaming, enlarging the bubbles in the hydraulic composition, and reducing the weight of the hydraulic composition; and from the viewpoints of enlarging the bubbles in the hydraulic composition and making the bubbles uniform in the hydraulic composition, it is preferably 1.0 or less, more preferably 0.5 or less, even more preferably 0.4 or less, and even more preferably 0.3 or less.

[0041] <Component (C)> The foaming agent composition for hydraulic compositions of the present invention can optionally contain (C) a monohydric alcohol having from 6 to 10 carbon atoms [hereinafter referred to as component (C)]. One or more types of component (C) can be used. The number of carbon atoms of component (C) is 6 or more and 10 or less, preferably 8, from the viewpoints of rapid foaming, foam stability during foaming, and increasing the size of bubbles in the hydraulic composition. Component (C) is a monohydric alcohol having a linear or branched hydrocarbon group, preferably a linear or branched alkyl group, more preferably a linear alkyl group, from the viewpoints of rapid foaming, foam stability during foaming, and increasing the size of bubbles in the hydraulic composition.

[0042] Specific examples of component (C) include one or more selected from hexanol, octanol, decanol, 2-ethylhexanol, and 2-propylheptanol. From the viewpoint of foamability, it is preferable to contain one or more selected from octanol and decanol, more preferably octanol. The content of one or more selected from octanol and decanol in component (C) is preferably 80% by mass or more, more preferably 90% by mass or more, and preferably 100% by mass or less, with substantially 100% by mass being particularly preferred. The content of octanol in component (C) is preferably 80% by mass or more, more preferably 90% by mass or more, and preferably 100% by mass or less, with substantially 100% by mass being particularly preferred.

[0043] When the foaming agent composition for hydraulic compositions of the present invention contains component (C), the foaming agent composition for hydraulic compositions of the present invention contains component (C) in an amount of preferably 0.5% by mass or more, more preferably 1% by mass or more, and even more preferably 1.5% by mass or more from the viewpoints of foam stabilization during foaming, enlarging the bubbles in the hydraulic composition, and reducing the weight of the hydraulic composition, and preferably 20% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less from the viewpoints of enlarging the bubbles in the hydraulic composition and uniformizing the bubbles in the hydraulic composition.

[0044] The foaming agent composition for hydraulic compositions of the present invention may optionally contain water. The foaming agent composition for hydraulic compositions of the present invention contains 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, 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 (A1), optionally component (A2), component (B), and water, the total content of component (A1), component (A2), 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.

[0045] 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, or a water-soluble polymer. These do not fall under the category of components (A1), (A2), (B), or (C). The foaming agent composition for hydraulic compositions of the present invention may contain optional components other than components (A1), (A2), (B), (C), and water in an amount of, for example, 10% by mass or less, 5% by mass or less, or 0% by mass or more.

[0046] The foaming agent composition for hydraulic compositions of the present invention can be obtained by mixing optional components such as component (A1), component (B), and component (A2). During mixing, heating may be performed as appropriate to reduce the solution viscosity.

[0047] 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. For gypsum board, it may be for gypsum slurry that forms gypsum board.

[0048] 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, and even more preferably 0.10% 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, and even more preferably 1.0% by mass or less.

[0049] [Use of Foaming Agent Composition for Hydraulic Composition as Foaming Agent for Hydraulic Composition] In an exemplary embodiment, the present invention provides use of the foaming agent composition for hydraulic composition of the present invention as a foaming agent for hydraulic composition. Also, in an exemplary embodiment, the present invention provides use of the foaming agent composition for hydraulic composition of the present invention as a foaming agent for gypsum slurry. The use may be use as a foaming agent for gypsum slurry to form gypsum board. Preferred aspects of the foaming agent composition for hydraulic composition in the use may be those described for the foaming agent composition for hydraulic composition of the present invention, as appropriate. For example, preferred aspects of the (A1) component, the (A2) component, the (B) component, and other optional components contained in the foaming agent composition for hydraulic composition of the present invention, and the contents of these components, are the same as those described for the foaming agent composition for hydraulic composition of the present invention. In addition, in the use of the present invention, preferred embodiments of the hydraulic composition and gypsum slurry in which the foaming agent composition for hydraulic compositions of the present invention is used as a foaming agent, and preferred modes of use of the foaming agent composition for hydraulic compositions of the present invention are the same as preferred modes of the bubble-containing hydraulic composition and the hydraulic composition in its manufacturing method, the bubble-containing gypsum slurry and the gypsum slurry in its manufacturing method, and preferred modes of use of the foaming agent composition for hydraulic compositions of the present invention, which will be explained in detail later.

[0050] [Bubble-Containing Hydraulic Composition and Manufacturing Method Thereof] 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. 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 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.

[0051] In an exemplary embodiment, the present invention provides a bubble-containing hydraulic composition comprising hydraulic powder, water, the component (A1), optionally the component (A2), and the component (B), wherein the mass ratio of the content of the component (A1) to the total content of the components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less. The features described for the foaming agent composition for hydraulic compositions of the present invention can be appropriately applied to the bubble-containing hydraulic composition of the present invention. Preferred aspects of the component (A1), component (A2), and component (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. The bubble-containing hydraulic composition of the present invention can also 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 for the foaming agent composition for hydraulic compositions of the present invention.

[0052] 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.

[0053] 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.

[0054] 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 improving the strength of the cured product. 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.

[0055] The bubble-containing hydraulic composition of the present invention contains component (A1) 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 cured 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 improving the strength of the cured body.

[0056] When the bubble-containing hydraulic composition of the present invention contains component (A2), the amount of component (A2) is preferably 0.0005 part by mass or more, more preferably 0.0015 part by mass or more, relative to 100 parts by mass of hydraulic powder, from the viewpoint of reducing the specific gravity of the hardened body, 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 diameter of bubbles in the hydraulic composition.

[0057] In the bubble-containing hydraulic composition of the present invention, the mass ratio of the content of the component (A1) to the total content of the components (A1) and (A2) [(A1) / [(A1)+(A2)]] is 0.6 or more, preferably 0.7 or more, more preferably 0.9 or more, and even more preferably 0.95 or more, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition, and is 1 or less, preferably 1.0 or less, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition.

[0058] The bubble-containing hydraulic composition of the present invention contains component (B) in an amount of preferably 0.0001 part by mass or more, more preferably 0.0005 part by mass or more, and even more preferably 0.001 part by mass or more, per 100 parts by mass of hydraulic powder, from the viewpoint of increasing the diameter of bubbles in the hydraulic composition, and preferably 0.020 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 uniform distribution of bubbles in the hydraulic composition.

[0059] In the bubble-containing hydraulic composition of the present invention, the mass ratio of the content of the component (B) to the content of the component (A1) [(B) / (A1)] is preferably 0.01 or more, more preferably 0.05 or more, and even more preferably 0.10 or more, from the viewpoint of increasing the size of bubbles in the hydraulic composition and reducing the weight of the hydraulic composition, and is preferably 1.0 or less, more preferably 0.5 or less, even more preferably 0.4 or less, and even more preferably 0.3 or less, from the viewpoint of increasing the size of bubbles in the hydraulic composition and making the bubbles uniform in the hydraulic composition.

[0060] In the bubble-containing hydraulic composition of the present invention, the mass ratio of the content of the component (B) to the total content of the components (A1) and (A2) [(B) / [(A1)+(A2)]] is preferably 0.01 or more, more preferably 0.05 or more, and even more preferably 0.10 or more, from the viewpoint of increasing the size of bubbles in the hydraulic composition and reducing the weight of the hydraulic composition, and is preferably 1.0 or less, more preferably 0.5 or less, and even more preferably 0.3 or less, from the viewpoint of increasing the size of bubbles in the hydraulic composition and making the bubbles uniform in the hydraulic composition.

[0061] When the bubble-containing hydraulic composition of the present invention contains component (C), the component (C) is preferably contained in an amount of 0.0001 part by mass or more, more preferably 0.0005 part by mass or more, even more preferably 0.001 part by mass or more, even more preferably 0.001 part by mass or more, still more preferably 0.0015 part by mass or more, even more preferably 0.002 part by mass or more, still more preferably 0.003 part by mass or more, relative to 100 parts by mass of hydraulic powder, from the viewpoint of reducing the specific gravity of the hardened body; and from the viewpoint of increasing the diameter of bubbles in the hydraulic composition and making the bubbles uniform in the hydraulic composition, the component (C) is preferably contained in an amount of 0.020 part by mass or less, more preferably 0.015 part by mass or less, even more preferably 0.010 part by mass or less, still more preferably 0.005 part by mass or less.

[0062] 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.

[0063] The bubble-containing hydraulic composition of the present invention may optionally contain one or more dispersants selected from naphthalene-based polymers, polycarboxylic acid-based polymers, lignin sulfonic acid-based polymers, and melamine-based polymers from the viewpoint of improving the fluidity of the hydraulic slurry composition. The dispersant is preferably one or more selected from naphthalene-based polymers from the viewpoint of increasing the diameter of bubbles in the hydraulic composition. Furthermore, the dispersant is preferably one or more selected from polycarboxylic acid-based polymers from the viewpoint of improving the water reduction rate.

[0064] When a polycarboxylic acid polymer is used as a dispersant, it has good dispersibility and water reduction properties when producing a bubble-containing hydraulic composition, which has the advantage of accelerating drying when curing the bubble-containing hydraulic composition and reducing fuel costs, but the average bubble diameter of the cured product of the bubble-containing hydraulic composition tends to be smaller than when a naphthalene polymer is used as a dispersant.The bubble-containing hydraulic composition of the present invention can increase the average bubble diameter of the cured product of the bubble-containing hydraulic composition even when a polycarboxylic acid polymer is used as a dispersant.

[0065] 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.

[0066] 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.

[0067] 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, even more preferably 900 μm or less, even more preferably 800 μm or less, even more preferably 700 μm or less, and even more preferably 650 μm or less. From the viewpoint of improving the strength of the cured product, it is preferably 300 μm or more, more preferably 350 μm or more, and even more preferably 400 μm or more. 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 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) the measured values. The diameter of the cross section of the cells is measured as follows: if the cross section of the cells is circular, the diameter is measured; if the cross section of the cells is elliptical, the diameter is measured along the major axis; and if the cross section of the cells is irregular, the diameter is measured along the longest part.

[0068] The bubble-containing hydraulic composition of the present invention may be a bubble-containing hydraulic composition having a bubble distribution with a larger average bubble diameter than a bubble-containing hydraulic composition having the same compositions of components (A1) and (A2) but not including component (B). The average bubble diameter of this bubble distribution is calculated in the same manner as for the average bubble diameter of the cured product of the bubble-containing hydraulic composition of the present invention.

[0069] In an exemplary embodiment, the gas bubble-containing hydraulic composition of the present invention may be a gas bubble-containing hydraulic composition obtained by mixing a hydraulic composition containing hydraulic powder and water with foam obtained by foaming a liquid composition containing the foaming agent composition for hydraulic compositions, which contains the component (A1), optionally the component (A2), and the component (B), and in which the mass ratio [(A1) / [(A1)+(A2)]] of the content of the component (A1) to the total content of the components (A1) and (A2) is 0.6 or more and 1 or less. The gas bubble-containing hydraulic composition of the present invention may also be a gas bubble-containing hydraulic composition obtained by hardening a mixture of a hydraulic composition containing hydraulic powder and water with foam obtained by foaming the liquid composition.

[0070] In the bubble-containing hydraulic composition of the present invention, the liquid composition contains a 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, and even more preferably 0.10% by mass or more, from the viewpoint of reducing the specific gravity of the set body, and preferably 5.0% by mass or less, more preferably 3.0% by mass or less, and even more preferably 1.0% by mass or less, from the viewpoint of improving the strength of the set body.

[0071] <Method for Producing Aerated Hydraulic Composition> In an exemplary embodiment, the aerated 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 aerated hydraulic compositions, 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> A step of foaming a liquid composition containing the foaming agent composition for hydraulic compositions of the present invention and water, the foaming agent composition comprising the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio [(A1) / [(A1)+(A2)]] of the content of component (A1) to the total content of component (A1) and component (A2) is 0.6 or more and 1 or less, and the liquid composition containing water to obtain a foam. Component (A1): one or more selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group having from 8 to 10 carbon atoms and salts thereof; Component (A2): one or more selected from surfactants other than component (A1) and component (B); Component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers. <Step 2> A step of mixing the foam obtained in step 1 with a hydraulic composition containing hydraulic powder and water.

[0072] The bubble-containing hydraulic composition of the present invention can be prepared by this manufacturing method. In the manufacturing method of the bubble-containing hydraulic composition of the present invention, 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. In the manufacturing method of the bubble-containing hydraulic composition of the present invention, the contents of each component and their mass ratios 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.

[0073] In step 1, the liquid composition contains, from the viewpoint of reducing the specific gravity of the hardened body, preferably 0.01 mass % or more, more preferably 0.05 mass % or more, and even more preferably 0.10 mass % or more of a foaming agent composition for hydraulic compositions, and, from the viewpoint of improving the strength of the hardened body, preferably 5.0 mass % or less, more preferably 3.0 mass % or less, and even more preferably 1.0 mass % or less.

[0074] 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.

[0075] 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 improving the strength of the set body. In this production method, known admixtures and additives can be mixed in step 1 and / or step 2.

[0076] 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 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. 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.

[0077] 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.

[0078] The method for producing a bubble-containing hydraulic composition of the present invention may also 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 sheets of base paper 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.

[0079] 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 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).

[0080] [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. In an exemplary embodiment, the present invention provides a gas bubble-containing gypsum slurry containing gypsum, water, the component (A1), optionally the component (A2), and the component (B). The gas bubble-containing gypsum slurry may be a gas bubble-containing hydraulic composition in which the hydraulic powder contains gypsum. The gas bubble-containing gypsum slurry of the present invention may be a gas bubble-containing gypsum slurry obtained by mixing a gypsum slurry containing gypsum and water with foam obtained by foaming a liquid composition containing the foaming agent composition for hydraulic compositions, which contains the component (A1), optionally the component (A2), and the component (B), and in which the mass ratio [(A1) / [(A1)+(A2)]] of the content of the component (A1) to the total content of the components (A1) and (A2) is 0.6 or more and 1 or less. The gas bubble-containing gypsum slurry of the present invention is suitable for use in gypsum boards formed by molding the gas bubble-containing gypsum slurry into a plate shape and hardening it.

[0081] 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 manufacturing method for the foaming agent composition of the present invention can be appropriately applied to the foaming agent composition of the present invention. The preferred embodiments of the foaming agent composition for hydraulic compositions in the foaming agent composition of the present invention, the preferred embodiments and contents of the (A1), (A2), and (B) components are the same as those described in the foaming agent composition for hydraulic compositions of the present invention. The foaming agent composition of the present invention can also contain the (C) component and other optional components. The (C) component and optional components are the same as those described in the foaming agent composition for hydraulic compositions or the foaming agent composition of the present invention.

[0082] 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.

[0083] 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).

[0084] 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.

[0085] The bubble-containing gypsum slurry of the present invention can 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.

[0086] In an exemplary embodiment, 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> A step of foaming a liquid composition containing the foaming agent composition for hydraulic compositions of the present invention, which contains the component (A1), optionally the component (A2), and the component (B), and wherein the mass ratio [(A1) / [(A1)+(A2)]] of the content of the component (A1) to the total content of the components (A1) and (A2) is 0.6 or more and 1 or less, and water, and water, and <Step 2> A step of mixing the foam obtained in step 1 with a gypsum slurry containing gypsum and water.

[0087] 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.

[0088] The method for producing a bubble-containing gypsum slurry may further include the following step 3. Step 3 can be carried out in accordance with the method for producing a bubble-containing hydraulic composition of the present invention. <Step 3> A step of forming the bubble-containing gypsum slurry obtained in step 2, and hardening and / or drying the slurry. The forming, hardening, and drying can be carried out by known methods. For example, a gypsum board can be prepared by referring to "Gypsum Board Production" described on pages 322 to 324 of "Gypsum Lime Handbook" (edited by the Gypsum Lime Society).

[0089] 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.

[0090] 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.

[0091] <1> A bubble-containing hydraulic composition comprising hydraulic powder, water, the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio of the content of component (A1) to the total content of components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less: Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; Component (A2): one or more selected from surfactants other than component (A1) and component (B); and Component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers.

[0092] <2> The bubble-containing hydraulic composition according to <1>, wherein the component (A1) contains one or more selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group with 8 carbon atoms 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 and salts thereof (hereinafter referred to as C10AS), and the mass ratio of the C8AS content to the C10AS content in the component (A1) (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.

[0093] <3> The bubble-containing hydraulic composition according to <1>, wherein the component (A1) contains one or more selected from alkyl or alkenyl sulfate esters having an alkyl or alkenyl group with 8 carbon atoms 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 and salts thereof (hereinafter referred to as C10AS), and the mass ratio of the C8AS content to the C10AS content in the component (A1) (C8AS / C10AS) is preferably 0.4 or more and 1.6 or less, more preferably 0.6 or more and 1.4 or less, and even more preferably 0.8 or more and 1.2 or less.

[0094] <4> The bubble-containing hydraulic composition according to any one of <1> to <3>, wherein the hydraulic powder is gypsum.

[0095] <5> The bubble-containing hydraulic composition according to any one of <1> to <4>, 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.

[0096] <6> The bubble-containing hydraulic composition according to any one of <1> to <4>, 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.

[0097] <7> The bubble-containing hydraulic composition according to any one of <1> to <6>, wherein the water / hydraulic powder ratio 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.

[0098] <8> The bubble-containing hydraulic composition according to any one of <1> to <6>, wherein the water / hydraulic powder ratio 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.

[0099] <9> The bubble-containing hydraulic composition according to any one of <1> to <8>, which contains the component (A1) 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, per 100 parts by mass of the hydraulic powder.

[0100] <10> The bubble-containing hydraulic composition according to any one of <1> to <8>, wherein the bubble-containing hydraulic composition contains the component (A1) 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, per 100 parts by mass of the hydraulic powder.

[0101] <11> The bubble-containing hydraulic composition according to any one of <1> to <10>, which contains the component (A2), and the bubble-containing hydraulic composition contains the component (A2) in an amount of preferably 0.0005 parts by mass or more, more preferably 0.0015 parts by mass or more, and preferably 0.015 parts by mass or less, more preferably 0.010 parts by mass or less, and even more preferably 0.005 parts by mass or less, per 100 parts by mass of the hydraulic powder.

[0102] <12> The bubble-containing hydraulic composition according to any one of <1> to <10>, which contains the component (A2), and the bubble-containing hydraulic composition contains the component (A2) in an amount of preferably 0.0005 parts by mass or more and 0.015 parts by mass or less, more preferably 0.0015 parts by mass or more and 0.010 parts by mass or less, and even more preferably 0.0015 parts by mass or more and 0.005 parts by mass or less, per 100 parts by mass of the hydraulic powder.

[0103] <13> The bubble-containing hydraulic composition according to any one of <1> to <12>, wherein the mass ratio of the content of the component (A1) to the total content of the components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more, preferably 0.7 or more, more preferably 0.9 or more, even more preferably 0.95 or more, and is 1 or less, preferably 1.0 or less.

[0104] <14> The bubble-containing hydraulic composition according to any one of <1> to <12>, wherein the mass ratio of the content of the component (A1) to the total content of the components (A1) and (A2) in the bubble-containing hydraulic composition, [(A1) / [(A1)+(A2)]], is preferably 0.6 or more and 1.0 or less, more preferably 0.7 or more and 1.0 or less, even more preferably 0.9 or more and 1.0 or less, and still more preferably 0.95 or more and 1.0 or less.

[0105] <15> The bubble-containing hydraulic composition according to any one of <1> to <14>, which contains the component (B) in an amount of preferably 0.0001 part by mass or more, more preferably 0.0005 part by mass or more, even more preferably 0.001 part by mass or more, and preferably 0.020 part by mass or less, more preferably 0.010 part by mass or less, even more preferably 0.005 part by mass or less, relative to 100 parts by mass of the hydraulic powder.

[0106] <16> The bubble-containing hydraulic composition according to any one of <1> to <14>, wherein the bubble-containing hydraulic composition contains the component (B) in an amount of preferably 0.0001 part by mass or more and 0.020 part by mass or less, more preferably 0.0005 part by mass or more and 0.010 part by mass or less, and even more preferably 0.001 part by mass or more and 0.005 part by mass or less, relative to 100 parts by mass of the hydraulic powder.

[0107] <17> The bubble-containing hydraulic composition according to any one of <1> to <16>, wherein the mass ratio of the content of the component (B) to the content of the component (A1) [(B) / (A1)] in the bubble-containing hydraulic composition is preferably 0.01 or more, more preferably 0.05 or more, even more preferably 0.10 or more, and is preferably 1.0 or less, more preferably 0.5 or less, even more preferably 0.4 or less, and even more preferably 0.3 or less.

[0108] <18> The bubble-containing hydraulic composition according to any one of <1> to <16>, wherein the mass ratio of the content of the component (B) to the content of the component (A1) [(B) / (A1)] in the bubble-containing hydraulic composition is preferably 0.01 or more and 1.0 or less, more preferably 0.05 or more and 0.5 or less, even more preferably 0.10 or more and 0.4 or less, and still more preferably 0.10 or more and 0.3 or less.

[0109] <19> The bubble-containing hydraulic composition according to any one of <1> to <18>, wherein the mass ratio of the content of the component (B) to the total content of the components (A1) and (A2) in the bubble-containing hydraulic composition, [(B) / [(A1)+(A2)]], is preferably 0.01 or more, more preferably 0.05 or more, even more preferably 0.10 or more, and is preferably 1.0 or less, more preferably 0.5 or less, even more preferably 0.3 or less.

[0110] <20> The bubble-containing hydraulic composition according to any one of <1> to <18>, wherein the mass ratio of the content of the component (B) to the total content of the components (A1) and (A2) in the bubble-containing hydraulic composition, [(B) / [(A1)+(A2)]], is preferably 0.01 or more and 1.0 or less, more preferably 0.05 or more and 0.5 or less, and even more preferably 0.10 or more and 0.3 or less.

[0111] <21> The bubble-containing hydraulic composition according to any one of <1> to <20>, wherein the bubble-containing hydraulic composition contains 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.

[0112] <22> The bubble-containing hydraulic composition according to <21>, which contains the dispersant in an amount of preferably 0.025 parts by mass or more, more preferably 0.050 parts by mass or more, even more preferably 0.100 parts 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, relative to 100 parts by mass of the hydraulic powder.

[0113] <23> The bubble-containing hydraulic composition according to <21>, wherein the bubble-containing hydraulic composition contains the dispersant in an amount of preferably 0.025 parts by mass or more and 1.0 parts by mass or less, more preferably 0.050 parts by mass or more and 0.5 parts by mass or less, and even more preferably 0.100 parts by mass or more and 0.3 parts by mass or less, relative to 100 parts by mass of the hydraulic powder.

[0114] <24> The bubble-containing hydraulic composition according to any one of <1> to <23>, wherein the specific gravity of the bubble-containing hydraulic composition is preferably 0.3 or more, more preferably 0.4 or more, even more preferably 0.5 or more, and preferably 0.9 or less, more preferably 0.8 or less, even more preferably 0.7 or less.

[0115] <25> The bubble-containing hydraulic composition according to any one of <1> to <23>, wherein the specific gravity of the bubble-containing hydraulic composition is preferably 0.3 or more and 0.9 or less, more preferably 0.4 or more and 0.8 or less, and even more preferably 0.5 or more and 0.7 or less.

[0116] <26> The bubble-containing hydraulic composition according to any one of <1> to <25>, wherein the bubble-containing hydraulic composition has a bubble distribution with a larger average bubble diameter than a bubble-containing hydraulic composition having the same compositions of components (A1) and (A2) but not including component (B).

[0117] <27> The bubble-containing hydraulic composition according to any one of <1> to <26>, wherein the average bubble diameter of the set body of the bubble-containing hydraulic composition is preferably 1,250 μm or less, more preferably 1,200 μm or less, even more preferably 1,000 μm or less, even 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 from the viewpoint of improving the strength of the set body, preferably 300 μm or more, more preferably 350 μm or more, even more preferably 400 μm or more.

[0118] <28> The bubble-containing hydraulic composition according to any one of <1> to <26>, wherein the average bubble diameter of a cured product of the bubble-containing hydraulic composition is preferably 300 μm or more and 1,250 μm or less, more preferably 300 μm or more and 1,200 μm or less, even more preferably 350 μm or more and 1,200 μm or less, still more preferably 400 μm or more and 1,000 μm or less, still more preferably 400 μm or more and 900 μm or less, still more preferably 400 μm or more and 800 μm or less, still more preferably 400 μm or more and 700 μm or less, and still more preferably 400 μm or more and 650 μm or less.

[0119] <29> The bubble-containing hydraulic composition according to any one of <1> to <28>, wherein the component (A1) is at least one selected from alkyl or alkenyl sulfate esters and salts thereof, each having an alkyl or alkenyl group having from 8 to 10 carbon atoms.

[0120] <30> The bubble-containing hydraulic composition according to any one of <1> to <29>, wherein the component (A2) is a surfactant having an alkyl group or an alkenyl group having from 8 to 22 carbon atoms (excluding those corresponding to the components (A1) and (B)).

[0121] <31> The component (A2) is an alkyl or alkenyl sulfonic acid having an alkyl or alkenyl group having from 8 to 22 carbon atoms, an alkyl or alkenyl sulfate ester having an alkyl or alkenyl group having from 11 to 22 carbon atoms, an alkyl or alkenyl benzene sulfonic acid having an alkyl or alkenyl group having from 8 to 22 carbon atoms, a polyoxyalkylene alkyl or alkenyl ether sulfate ester having an alkyl or alkenyl group having from 8 to 22 carbon atoms, an alkyl or alkenyl sulfosuccinic acid having at least one alkyl or alkenyl group having from 8 to 22 carbon atoms, an α-sulfofatty acid methyl ester having an alkyl or alkenyl group having from 8 to 22 carbon atoms, a polyoxyalkylene alkyl or alkenyl ether carboxylic acid having an alkyl or alkenyl group having from 8 to 22 carbon atoms, an α-olefin sulfonic acid in which the olefin carbon number is from 8 to 22, an internal olefin sulfonic acid in which the olefin carbon number is from 8 to 22, and salts thereof. The bubble-containing hydraulic composition according to any one of <1> to <30>,

[0122] <32> The bubble-containing hydraulic composition according to any one of <1> to <31>, wherein component (B) is at least one selected from alkyl glyceryl ethers having an alkyl group with 5 to 22 carbon atoms and alkenyl glyceryl ethers having an alkenyl group with 5 to 22 carbon atoms.

[0123] <33> The bubble-containing hydraulic composition according to any one of <1> to <32>, wherein the component (B) is at least one selected from alkyl glyceryl ethers having a branched alkyl group having from 5 to 22 carbon atoms and alkenyl glyceryl ethers having a branched alkenyl group having from 5 to 22 carbon atoms.

[0124] <34> A method for producing a bubble-containing hydraulic composition, comprising the following steps 1 and 2: <Step 1> A step of foaming a liquid composition containing a foaming agent composition for hydraulic compositions, which contains the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio of the content of component (A1) to the total content of components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less, and water, to obtain a foam: Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; Component (A2): one or more surfactants selected from components (A1) and (B); and Component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers. <Step 2> A step of mixing a hydraulic powder, water, and the foam obtained in step 1.

[0125] <35> The method for producing a bubble-containing hydraulic composition according to <34>, wherein the hydraulic powder is gypsum.

[0126] <36> The method for producing a bubble-containing hydraulic composition according to <34> or <35>, wherein in step 2, the hydraulic powder, water, a dispersant, and the foam obtained in step 1 are mixed, and the dispersant is one or more selected from the group consisting of a naphthalene-based polymer, a polycarboxylic acid-based polymer, a lignin sulfonic acid-based polymer, and a melamine-based polymer.

[0127] <37> A method for producing the bubble-containing hydraulic composition according to any one of <34> to <36>, 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.

[0128] <38> The method for producing a bubble-containing hydraulic composition according to <37>, wherein the hydraulic powder is gypsum, and the step 3 includes a molding step of disposing 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, and 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.

[0129] <39> A bubble-containing gypsum slurry obtained by mixing a gypsum slurry containing gypsum and water with foam obtained by foaming a liquid composition containing a foaming agent composition for hydraulic compositions, which contains the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio [(A1) / [(A1)+(A2)]] of the content of the component (A1) to the total content of the components (A1) and (A2) is from 0.6 to 1. Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; component (A2): one or more selected from surfactants other than component (A1) and component (B); and component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers.

[0130] <40> A foaming agent composition for hydraulic compositions, comprising the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio of the content of the component (A1) to the total content of the components (A1) and (A2), [(A1) / [(A1)+(A2)]], is from 0.6 to 1. Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; component (A2): one or more selected from surfactants other than component (A1) and component (B); and component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers.

[0131] <41> The foaming agent composition for hydraulic compositions according to <40>, wherein the foaming agent composition for hydraulic compositions contains the component (A1) 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, in the composition.

[0132] <42> The foaming agent composition for hydraulic compositions according to <40>, wherein the foaming agent composition for hydraulic compositions contains the component (A1) 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, in the composition.

[0133] <43> The foaming agent composition for hydraulic compositions according to any one of <40> to <42>, which contains the component (A2), and the foaming agent composition for hydraulic compositions contains the component (A2) 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 15% by mass or less, more preferably 10% by mass or less, in the composition.

[0134] <44> The foaming agent composition for hydraulic compositions according to any one of <40> to <42>, which contains the component (A2), and the foaming agent composition for hydraulic compositions contains the component (A2) in an amount of preferably 0.5% by mass or more and 15% by mass or less, more preferably 1.0% by mass or more and 10% by mass or less, even more preferably 2.0% by mass or more and 10% by mass or less, and still more preferably 3.0% by mass or more and 10% by mass or less, based on the total amount of the foaming agent composition for hydraulic compositions.

[0135] <45> The foaming agent composition for hydraulic compositions according to any one of <40> to <44>, which contains the component (B) in an amount of preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, even more preferably 1.5% by mass or more, even more preferably 2% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 10% by mass or less, in the composition.

[0136] <46> The foaming agent composition for hydraulic compositions according to any one of <40> to <44>, wherein the foaming agent composition for hydraulic compositions contains the component (B) in an amount of preferably 0.1% by mass or more and 30% by mass or less, more preferably 0.5% by mass or more and 20% by mass or less, even more preferably 1% by mass or more and 10% by mass or less, still more preferably 1.5% by mass or more and 10% by mass or less, and even more preferably 2% by mass or more and 10% by mass or less.

[0137] <47> The foaming agent composition for hydraulic compositions according to any one of <40> to <46>, wherein the mass ratio of the content of the component (A1) to the total content of the components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more, preferably 0.7 or more, more preferably 0.9 or more, even more preferably 0.95 or more, and is 1 or less, preferably 1.0 or less.

[0138] <48> The foaming agent composition for hydraulic compositions according to any one of <40> to <46>, wherein in the foaming agent composition for hydraulic compositions, the mass ratio of the content of the (A1) component to the total content of the (A1) component and the (A2) component, [(A1) / [(A1)+(A2)]], is preferably 0.6 or more and 1.0 or less, more preferably 0.7 or more and 1.0 or less, even more preferably 0.9 or more and 1.0 or less, and still more preferably 0.95 or more and 1.0 or less.

[0139] <49> The foaming agent composition for hydraulic compositions according to any one of <40> to <48>, wherein in the foaming agent composition for hydraulic compositions, the mass ratio of the content of the component (B) to the total content of the components (A1) and (A2) [(B) / [(A1)+(A2)]] is preferably 0.01 or more, more preferably 0.05 or more, even more preferably 0.10 or more, and preferably 1.0 or less, more preferably 0.5 or less, even more preferably 0.4 or less, and even more preferably 0.3 or less.

[0140] <50> The foaming agent composition for hydraulic compositions according to any one of <40> to <48>, wherein in the foaming agent composition for hydraulic compositions, the mass ratio of the content of the component (B) to the total content of the components (A1) and (A2), [(B) / [(A1)+(A2)]], is preferably 0.01 or more and 1.0 or less, more preferably 0.05 or more and 0.5 or less, even more preferably 0.10 or more and 0.4 or less, and still more preferably 0.10 or more and 0.3 or less.

[0141] <51> Use of the foaming agent composition for hydraulic compositions according to any one of <40> to <50> as a foaming agent for hydraulic compositions.

[0142] Examples The components used in preparing the foaming agent compositions for hydraulic compositions in the Examples and Comparative Examples are as follows: <Component (A1)> - (A1-1): C10AS, sodium decyl sulfate - (A1-2): C8AS, sodium octyl sulfate <Component (A2)> - (A2-1): C12AS, sodium lauryl sulfate - (A2-2): C14AS, sodium tetradecyl sulfate - (A2-3): C14-16AOS, sodium α-olefin sulfonate, olefin having 14-16 carbon atoms - (A2-4): C12AES (EO3), sodium polyoxyethylene alkyl ether sulfate, alkyl group having 12 carbon atoms, average number of added moles of oxyethylene groups being 3

[0143] <Component (B)> (B-1): GE-EH, 2-ethylhexyl glyceryl ether (B-2): GE-PH, 2-propylheptyl glyceryl ether (B-3): GE-ID, isodecyl glyceryl ether (B-4): GE-IS, isostearyl glyceryl ether <Component (C)> (C-1): C8OH, octanol, product name "Kalcol 0898" manufactured by Kao Corporation

[0144] (1) Preparation of foaming agent compositions for hydraulic compositions The foaming agent compositions for hydraulic compositions shown in Tables 1 to 5 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.

[0145] (2) Preparation of Gypsum Slurry The foaming agent compositions for hydraulic compositions prepared in Tables 1 to 5 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-blade 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 a dispersant (Mighty 150, manufactured by Kao Corporation) were added to a 500 mL disposable cup, and the mixture was stirred for 5 seconds at setting 3 using a hand mixer (MK-H4, manufactured by Panasonic Corporation) to prepare a gypsum slurry before foam addition. For the foaming agent composition for hydraulic compositions shown in Table 5, a gypsum slurry before foam addition was prepared in the same manner as above, except that 0.36 g of a polycarboxylic acid polymer (Mighty 21G-30, manufactured by Kao Corporation) was used as the dispersant. 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 in the 1 L disposable cup at 1,150 rpm for 15 seconds using the flat six-blade paddle blade 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 the gypsum slurry used in the kneading were both 20°C.

[0146] (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 Corporation) with a diameter of 5 cm and a height of 10 cm and left to stand at room temperature for more than 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 dry in a thermostatic bath at 80 ° C for 17 hours, and the mass of the gypsum specimen was measured. The specific gravity of the gypsum specimen was calculated by dividing the mass of the obtained gypsum specimen by the volume of the mold. In addition, a cut was made in a part 5 cm high 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 visible small bubbles, and the average bubble diameter was calculated from the arithmetic average of these values. The diameter of the cross section of the cells was measured when the cell cross section was circular, the major axis when the cell cross section was elliptical, and the longest part when the cell cross section was irregular. The results are shown in Tables 1 to 5.

[0147] (4) Evaluation of Foam Stability The foaming agent compositions for hydraulic compositions prepared in Tables 1 to 4 were mixed with water so that the concentration of the foaming agent composition for hydraulic compositions was 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 500 mL disposable cup and 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. The disposable cup containing the foam was allowed to stand, and the foam volume [mL] immediately after foaming, the foam volume [mL] after 5 minutes of standing, and the foam volume [mL] after 10 minutes of standing were read from the scale on the container to evaluate foam stability. The test was conducted at an ambient temperature of 20°C. The foam stability of the foaming agent composition for hydraulic compositions can be said to be excellent if the foam volume immediately after foaming is large, and if the foam is maintained 5 minutes, preferably 10 minutes, after foaming.

[0148] As shown in Tables 1 to 5, the foaming agent compositions for hydraulic compositions of the Examples were able to improve foam stability during foaming and increase the bubble diameter in the gypsum compared to Comparative Examples or Reference Examples that had the same compositions of components (A1) and (A2) but did not contain component (B). For example, comparing Example 1-1 and Comparative Example 1-1 in Table 1, when a composition having the same compositions of components (A1) and (A2) was used as the same activator composition, the foaming agent composition for hydraulic compositions of Example 1-1 had a relatively lower specific gravity of the gypsum specimen and a relatively larger average bubble diameter in the hydraulic composition compared to the foaming agent composition for hydraulic compositions of Comparative Example 1-1. This indicates that the foam stability during foaming of the foaming agent composition for hydraulic compositions was improved, and coalescence was promoted in the hydraulic composition, resulting in a larger bubble diameter.

[0149]

[0150]

[0151]

[0152]

[0153]

[0154] *1: In Tables 1-5, the hydraulic composition foaming agent composition concentration [mass%] is the concentration of the hydraulic composition foaming agent composition in an aqueous solution containing the hydraulic composition foaming agent composition prepared to produce foam. *2: In Tables 1-5, the relative value [%] of the specific gravity of the gypsum specimen relative to the same activator composition is a relative value based on a gypsum specimen produced with a hydraulic composition foaming agent composition having the same composition of components (A1) and (A2) but not containing component (B). *3: In Tables 1-5, the relative value [%] of the average bubble diameter relative to the same activator composition is a relative value based on a gypsum specimen produced with a hydraulic composition foaming agent composition having the same composition of components (A1) and (A2) but not containing component (B).

Claims

1. A bubble-containing hydraulic composition comprising hydraulic powder, water, the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio of the content of component (A1) to the total content of components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less: Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; Component (A2): one or more selected from surfactants other than components (A1) and (B); and Component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers.

2. The bubble-containing hydraulic composition according to claim 1, wherein component (A1) contains one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group with 8 carbon atoms (hereinafter referred to as C8AS), and one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group with 10 carbon atoms (hereinafter referred to as C10AS), and the mass ratio of the C8AS content to the C10AS content in component (A1) (C8AS / C10AS) is 0.4 or more and 1.6 or less.

3. The bubble-containing hydraulic composition according to claim 1 or 2, wherein the hydraulic powder is gypsum.

4. The bubble-containing hydraulic composition according to any one of claims 1 to 3, which contains one or more dispersants selected from naphthalene-based polymers, polycarboxylic acid-based polymers, lignin sulfonic acid-based polymers, and melamine-based polymers.

5. A bubble-containing hydraulic composition according to any one of claims 1 to 4, which has a bubble distribution with a larger average bubble diameter than a bubble-containing hydraulic composition having the same composition of components (A1) and (A2) but not including component (B).

6. The bubble-containing hydraulic composition according to any one of claims 1 to 5, wherein the average bubble diameter in the set body of the bubble-containing hydraulic composition is 300 μm or more and 1,200 μm or less.

7. The bubble-containing hydraulic composition according to any one of claims 1 to 6, wherein component (A2) is a surfactant having an alkyl or alkenyl group having from 8 to 22 carbon atoms (excluding those corresponding to components (A1) and (B)).

8. Component (A2) is an alkyl or alkenyl sulfonic acid having an alkyl or alkenyl group with 8 to 22 carbon atoms, an alkyl or alkenyl sulfate ester having an alkyl or alkenyl group with 11 to 22 carbon atoms, an alkyl or alkenyl benzene sulfonic acid having an alkyl or alkenyl group with 8 to 22 carbon atoms, a polyoxyalkylene alkyl or alkenyl ether sulfate ester having an alkyl or alkenyl group with 8 to 22 carbon atoms, an alkyl or alkenyl sulfosuccinic acid having one or more alkyl or alkenyl groups with 8 to 22 carbon atoms, an α-sulfofatty acid methyl ester having an alkyl or alkenyl group with 8 to 22 carbon atoms, a polyoxyalkylene alkyl or alkenyl ether carboxylic acid having an alkyl or alkenyl group with 8 to 22 carbon atoms, an α-olefin sulfonic acid in which the olefin carbon number is 8 to 22, an internal olefin sulfonic acid in which the olefin carbon number is 8 to 22, The bubble-containing hydraulic composition according to any one of claims 1 to 7, wherein the compound is one or more selected from the group consisting of ammonium nitrate, ...

9. A bubble-containing hydraulic composition according to any one of claims 1 to 8, wherein component (B) is at least one selected from alkyl glyceryl ethers having an alkyl group with 5 to 22 carbon atoms and alkenyl glyceryl ethers having an alkenyl group with 5 to 22 carbon atoms.

10. A bubble-containing hydraulic composition according to any one of claims 1 to 9, wherein component (B) is at least one selected from alkyl glyceryl ethers having a branched alkyl group with 5 to 22 carbon atoms and alkenyl glyceryl ethers having a branched alkenyl group with 5 to 22 carbon atoms.

11. A bubble-containing hydraulic composition according to any one of claims 1 to 10, wherein the mass ratio of the content of component (B) to the total content of components (A1) and (A2) in the composition, [(B) / [(A1) + (A2)]], is 0.01 or more and 1.0 or less.

12. A method for producing a bubble-containing hydraulic composition, comprising the following steps 1 and 2: <Step 1> A step of foaming a liquid composition containing a foaming agent composition for hydraulic compositions, which contains the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio of the content of component (A1) to the total content of components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less, and water, to obtain a foam: Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; Component (A2): one or more surfactants selected from components (A1) and (B); and Component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers. <Step 2> A step of mixing hydraulic powder, water, and the foam obtained in step 1.

13. The method for producing a bubble-containing hydraulic composition according to claim 12, wherein the hydraulic powder is gypsum.

14. A method for producing a bubble-containing hydraulic composition according to claim 12 or 13, wherein in step 2, hydraulic powder, water, a dispersant, and the foam obtained in step 1 are mixed, and the dispersant is one or more selected from naphthalene-based polymers, polycarboxylic acid-based polymers, lignin sulfonic acid-based polymers, and melamine-based polymers.

15. A method for producing the bubble-containing hydraulic composition according to any one of claims 12 to 14, 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.

16. A method for producing a bubble-containing hydraulic composition according to claim 15, wherein the hydraulic powder 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, and 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.

17. A foaming agent composition for hydraulic compositions, comprising the following component (A1), optionally the following component (A2), and the following component (B), wherein the mass ratio of the content of component (A1) to the total content of components (A1) and (A2), [(A1) / [(A1)+(A2)]], is 0.6 or more and 1 or less: Component (A1): one or more selected from alkyl or alkenyl sulfate esters and salts thereof having an alkyl or alkenyl group having from 8 to 10 carbon atoms; Component (A2): one or more selected from surfactants other than component (A1) and component (B); and Component (B): one or more selected from alkyl glyceryl ethers and alkenyl glyceryl ethers.

18. Use of the foaming agent composition for hydraulic compositions according to claim 17 as a foaming agent for hydraulic compositions.

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