Powdered thickener composition

Abstract

To provide a powdery thickener composition that has excellent dispersibility in a to-be-thickened object and improves the homogeneity of the to-be-thickened object.SOLUTION: A powdery thickener composition contains (A) two or more ampholytic surfactants represented by the general formula (1) and (B) inorganic powder. The (A) two or more compounds have different X's in the general formula (1). In at least one of the two or more compounds, R1a or R1b of X in the general formula (1) is a compound of alkenyl group. [In the formula, X is a group represented by R1a or R1b-[CONH-CH2CH2CH2]n-. R1a and R1b each represent an alkyl group or alkenyl group having a predetermined number of carbon atoms. n is an integer of 1-3. R2 and R3 each represent a C1-4 alkyl group or a group represented by -(C2H4O)pH. p is a total of R2 and R3 to represent 0-5].SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a powdery thickener composition, a slurry composition, a method for producing a slurry composition, a method for improving the homogeneity of a hydraulic composition slurry, and a filling method. [Background technology]

[0002] Thickeners are widely used in foods, cosmetics, and other industrial products, and increase the viscosity of the system by retaining and binding solvents, dispersants, and dispersoids, thereby contributing to achieving the appropriate texture required for each application and improving the stability of the system.

[0003] Based on the idea that thickeners hold and restrain solvents, dispersion media, and dispersoids, their molecular design is considered to have structural units that exhibit an interactive force with solvents, dispersion media, and dispersoids. Typical thickeners include cellulose ether-based thickeners, acrylic-based thickeners, polyvinyl alcohol-based thickeners, polyoxyethylene-based thickeners, clay-based thickeners, and surfactant-based thickeners.

[0004] Furthermore, since thickeners exhibit their thickening properties by dissolving or dispersing in a solvent or dispersant, most of them are distributed in the form of a solid or a highly effective liquid product from which the solvent or dispersant has been removed as much as possible, from the viewpoint of handling and transportation.

[0005] In hydraulic slurries containing hydraulic powder such as cement, thickeners (rheology modifiers) are sometimes used to improve physical properties such as viscosity and resistance to material separation. Patent Document 1 discloses a rheology modifier containing a specific quaternary salt-type compound containing a quaternary cationic group and an aromatic anionic group, and an anionic aromatic compound, in a specific cationic group / (anionic group+anionic aromatic compound) molar ratio. Patent Document 2 discloses a rheology modifier characterized by the combined use of two different amphoteric surfactants. Patent Document 3 discloses a method of powdering an aqueous solution or an alcoholic aqueous solution of an amine oxide by supporting it on zeolite. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-065189 [Patent Document 2] Japanese Patent Publication No. 2020-076022 [Patent Document 3] Japanese Patent Application Publication No. 57-054159 Summary of the Invention [Problem to be solved by the invention]

[0007] Solid or highly effective liquid thickeners are dissolved or dispersed in an aqueous solution or slurry before use. In this case, the thickener may form flocs or gels, which may impair the thickening effect of the aqueous solution or slurry. Therefore, if other ingredients are included, the thickener is mixed with the other ingredients in advance to prevent the formation of flocs or gels due to contact between the thickener and water.

[0008] However, under actual conditions of use, premixing with other components is difficult due to equipment constraints such as the shape and load of the mixer, and in many cases a thickener is added to the aqueous solution or slurry afterward to obtain an aqueous solution or slurry with modified rheology.

[0009] Therefore, at work sites where there are restrictions on powder mixing as described above, excessive stirring is required to sufficiently disperse the splinters or gel in the aqueous solution or slurry, which prolongs the construction time and reduces other required performance such as workability.Furthermore, in environments where sufficient stirring is not possible, the splinters or gel may remain, compromising the homogeneity of the aqueous solution or slurry.

[0010] The present invention provides a powdery thickener composition that has excellent dispersibility in a target to be thickened and improves the homogeneity of the target to be thickened. [Means for solving the problem]

[0011] The present invention relates to a method for producing an inorganic powder comprising (A) two or more amphoteric surfactants represented by the following general formula (1) and (B) an inorganic powder, wherein the two or more compounds of (A) have different X's in the general formula (1), and at least one of the two or more compounds has a different R of X's in the general formula (1). 1a or R 1b is a compound having an alkenyl group.

[0012] [ka] [Wherein X is R 1a or R 1b -[CONH-CH2CH2CH2] n R is a group represented by the formula 1a R is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. 1b is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. n is an integer of 1 to 3. 2 and R 3 are each independently an alkyl group having 1 to 4 carbon atoms or -(C2H4O) p H. p is the average number of moles added, and R 2 and R 3 The sum of these is a number between 0 and 5.

[0013] The present invention also relates to a slurry composition containing the above powdery thickener composition, water, and a powder.

[0014] The present invention also relates to a method for producing a slurry composition, which comprises mixing the powdery thickener composition, water, and a powder.

[0015] The present invention also relates to a method for improving the homogeneity of a slurry, which comprises adding the above powdery thickener composition to a slurry containing a powder and water.

[0016] The present invention also relates to a filling method using the above slurry composition. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide a powdery thickener composition that has excellent dispersibility in a target to be thickened and improves the homogeneity of the target to be thickened. DETAILED DESCRIPTION OF THE INVENTION

[0018] In recent years, the Sustainable Development Goals (SDGs) have been proposed to realize a sustainable society. This invention can improve chemical economy by improving homogeneity and reduce labor in mixing and stirring processes, and is thought to be a technology that can contribute to SDGs 6, 7, 8, 9, 11, 12, 13, and 14, for example.

[0019] The inventors have found that when a powdery thickener composition containing an amphoteric surfactant and an inorganic powder is added to an aqueous solution or slurry to be thickened, the formation of lumps or gels in the aqueous solution or slurry is suppressed, and the homogeneity of the aqueous solution or slurry obtained after uniform stirring and mixing is improved.

[0020] The mechanism by which the present invention improves the dispersibility of a thickened object and the homogeneity of the thickened object is not entirely clear, but is presumed to be as follows: Among the cohesive attractive forces of dry powders, electrostatic forces are known to be a significant interactive force. Meanwhile, it is believed that the "wetting" of dry powders is promoted as the hydrophilicity of the dry powder increases. The present invention incorporates an amphoteric surfactant with excellent surface tension-reducing properties into an inorganic powder. When the powdered thickener composition of the present invention is added to a thickened object, this promotes the wetting of the powdered thickener composition surface with water, thereby reducing electrostatic forces. This improves the dispersibility of the powdered thickener composition in the thickened object and suppresses the formation of lumps or gels in the thickened object. As a result, the homogeneity of the thickened object obtained after uniform stirring and mixing is improved. However, the present invention is not limited to this mechanism of action.

[0021] <Powdered Thickener Composition> First, the powdery thickener composition of the present invention will be described. The powdery thickener composition of the present invention comprises (A) two or more compounds represented by the above general formula (1) [hereinafter also referred to as compound (1)] [hereinafter also referred to as component (A)], and (B) an inorganic powder [hereinafter also referred to as component (B)], wherein the two or more compounds of (A) have different X in general formula (1), and at least one of the two or more compounds has R of X in general formula (1). 1a or R 1b is a compound having an alkenyl group. The powdery thickener composition of the present invention may be a powdery thickener composition in which component (A) is supported on component (B). For example, component (A) can be supported on component (B) by mixing a liquid composition containing component (A) with component (B).

[0022] Regarding the compound (1), when X in the general formula (1) is different, for example, when there are two kinds of compound (1), the following embodiments can be mentioned. In the following embodiments, R of at least one of the two kinds of compound (1) is different. 1a or R 1b is an alkenyl group. (i) One R1a or R 1b is an alkyl group, and the other R 1a or R 1b is an alkenyl group. (ii) One R 1a or R 1b The number of carbon atoms in the other R 1a or R 1b The carbon numbers are different. (iii) One of the Xs is R 1a and the other X is R 1b -[CONH-CH2CH2CH2] n -It is. (iv) Both X and R 1b -[CONH-CH2CH2CH2] n - and one n is different from the other n. (v) A combination of (i) to (iv) above.

[0023] In the general formula (1), X is R 1a or R 1b -[CONH-CH2CH2CH2] n - is a group represented by the formula: R 1a is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. R 1a When is an alkenyl group, it preferably has 18 or more carbon atoms and preferably 22 or less carbon atoms. R 1a When is an alkyl group, it preferably has 16 or more carbon atoms and preferably has 22 or less carbon atoms. R 1b is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. R 1b When is an alkenyl group, it preferably has 17 or more carbon atoms and preferably 21 or less carbon atoms. R 1b When is an alkyl group, it preferably has 15 or more carbon atoms and preferably has 21 or less carbon atoms. n is preferably 0 or 1. R 2 and R3 are each independently preferably an alkyl group having 1 to 2 carbon atoms or -(C2H4O) p It is a group represented by H. p is preferably a number between 0 and 3.

[0024] The powdery thickener composition of the present invention contains two or more, preferably five or less, more preferably two, compounds (1) having different X's in general formula (1). At least one of the two or more compounds (1) contained in the powdery thickener composition has a different R of X's in general formula (1). 1a or R 1b is an alkenyl group having 14 to 22 carbon atoms, that is, R in X in general formula (1) 1a an alkenyl group having 14 to 22 carbon atoms as R 1b It is a compound containing an alkenyl group having 13 to 21 carbon atoms as the alkyl group.

[0025] In the present invention, there are two types of compound (1), and one of the two types of compound (1), including the above (i) to (v), is a compound in which X in the general formula (1) is R 1a and a compound having an alkenyl group with a carbon number of 14 to 22. That is, the powdery thickener composition of the present invention is a powdery thickener composition containing two compounds represented by the general formula (1) and (B) an inorganic powder, wherein the two compounds of (A) have different X in the general formula (1), and one of the two compounds has X in the general formula (1) represented by R 1a and R 1a is a compound having an alkenyl group.

[0026] The powdery thickener composition of the present invention is a thickener composition in which X in general formula (1) is R 1a or R 1b -[CONH-CH2CH2CH2] n - (wherein R 1a is an alkenyl group having 14 to 22 carbon atoms, and R 1bis an alkenyl group having from 13 to 21 carbon atoms), a compound (1b) in which X in the general formula (1) is different from that of the compound (1a), and (B) an inorganic powder. Specifically, the powdery thickener composition includes a compound (1a) represented by the following general formula (1a), a compound (1b) represented by the following general formula (1b), and (B) an inorganic powder.

[0027] [ka]

[0028] [During the ceremony, n1 and n2 each independently represent an integer of 0 or more and 3 or less. R 11a When n1 is 0, it is an alkenyl group having 14 to 22 carbon atoms, and when n1 is 1 to 3, it is an alkenyl group having 13 to 21 carbon atoms. R 11b When n2 is 0, it is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms, and when n2 is 1 to 3, it is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. However, if n1 and n2 are the same number, R 11b The alkenyl group in R 11a is an alkenyl group different from R 2 and R 3 are each independently an alkyl group having 1 to 4 carbon atoms or -(C2H4O) p H. p is the average number of moles added, and R 2 and R 3 The sum of these is a number between 0 and 5.

[0029] In general formula (1a), R 11a The number of carbon atoms is preferably 17 or more and preferably 22 or less. In the general formula (1a), n1 is preferably 0 or 1, and more preferably 0.

[0030] In the general formula (1b), n2 is 0 and R 11b When is an alkyl group, R 11b The number of carbon atoms is preferably 16 or more and preferably 22 or less. In the general formula (1b), n2 is 0 and R 11b When is an alkenyl group, R 11b The number of carbon atoms is preferably 18 or more and preferably 22 or less. In the general formula (1b), n2 is 1 to 3 and R 11b When is an alkyl group, R 11b The number of carbon atoms is preferably 15 or more and preferably 21 or less. In the general formula (1b), n2 is 1 to 3 and R 11b When is an alkenyl group, R 11b The number of carbon atoms is preferably 17 or more and preferably 21 or less. In general formula (1b), R 11b is preferably an alkyl group. In the general formula (1b), n2 is preferably 0 or 1.

[0031] In general formula (1a) or (1b), R 2 and R 3 are each independently preferably an alkyl group having 1 or 2 carbon atoms or -(C2H4O) p It is a group represented by H, and more preferably an alkyl group having 1 or 2 carbon atoms. In the general formula (1a) or (1b), p is preferably a number of 0 or more and 3 or less. If n1 and n2 are the same number, R 11b The alkenyl group in R 11a is an alkenyl group different from

[0032] A preferred powdery thickener composition of the present invention is a powdery thickener composition containing a compound (11a) represented by the following general formula (11a), a compound (1b) represented by the following general formula (1b), and (B) an inorganic powder.

[0033] [ka]

[0034] [During the ceremony, n2 is an integer between 0 and 3 inclusive. R 11a is an alkenyl group having 14 to 22 carbon atoms. R 11b When n2 is 0, it is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms, and when n2 is 1 to 3, it is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. However, if n2 is 0, R 11b The alkenyl group in R 11a is an alkenyl group different from R 2 and R 3 are each independently an alkyl group having 1 to 4 carbon atoms or -(C2H4O) p H. p is the average number of moles added, and R 2 and R 3 The sum of these is a number between 0 and 5.

[0035] The compound (11a) represented by the general formula (11a) corresponds to the compound in which n1 is 0 in the general formula (1a). 11a , R 2 and R 3 The preferred embodiments of the compound (1b) are the same as those of the general formula (1a). In this combination, the preferred embodiments of the compound (1b) are the same as those of the general formula (1a).

[0036] In the powdery thickener composition of the present invention, the mass ratio of compound (1b) / compound (1a) is preferably 5 / 95 or more, more preferably 25 / 75 or more, even more preferably 40 / 60 or more, and is preferably 95 / 5 or less, more preferably 75 / 25 or less, even more preferably 60 / 40 or less, from the viewpoint of obtaining a rheology-modifying effect, for example, high viscoelasticity, over a wider temperature range.

[0037] In the powdery thickener composition of the present invention, the mass ratio of compound (1b) / compound (11a) is preferably 5 / 95 or more, more preferably 25 / 75 or more, even more preferably 40 / 60 or more, and is preferably 95 / 5 or less, more preferably 75 / 25 or less, even more preferably 60 / 40 or less, from the viewpoint of obtaining a rheology-modifying effect, for example, high viscoelasticity, over a wider temperature range.

[0038] The powdery thickener composition of the present invention preferably contains a small amount of compounds having a structure similar to that of compound (1) and having an alkyl group or alkenyl group with a small number of carbon atoms. Specifically, it is preferable that the content of amine oxides having an alkyl group with less than 14 carbon atoms, an alkenyl group with less than 14 carbon atoms, or an acyl group with less than 14 carbon atoms (hereinafter also referred to as short-chain amine oxides) is small. The powdery thickener composition of the present invention preferably has a mass ratio of the total content of short-chain amine oxides to the total content of compound (1) of 50 / 50 or less, more preferably 25 / 75 or less, even more preferably 10 / 90 or less, and even more preferably 0 / 100, i.e., does not contain any short-chain amine oxides. For convenience, when considered in terms of general formula (1), a short-chain amine oxide is a compound represented by the formula: 1a is an alkyl group having less than 14 carbon atoms or an alkenyl group having less than 14 carbon atoms, and 1b is an alkyl group having less than 13 carbon atoms or an alkenyl group having less than 13 carbon atoms.

[0039] Component (B) is an inorganic powder. Examples of component (B) include powders of inorganic salts such as calcium carbonate and calcium silicate, powders of clay minerals such as kaolinite and bentonite, fine powders of blast furnace slag and fly ash, sodium sulfate, aluminum sulfate, zeolite, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, silica powder (including fine silica powder and porous silica powder), and any combination thereof. Component (B) is preferably an inorganic powder capable of supporting a liquid. From the viewpoint of anti-caking properties, powders of inorganic salts such as silica powder (including fine silica powder and porous silica powder), calcium carbonate, and calcium silicate are preferred, and silica powder (including fine silica powder and porous silica powder) is more preferred.

[0040] In the present invention, the term "having a liquid-holding capacity" of component (B) means that the oil absorption capacity according to the method described in JIS K6220(-1995) is 100 ml / 100 g or more. The oil absorption capacity of component (B) is preferably 200 ml / 100 g or more, and preferably 450 ml / 100 g or less, more preferably 350 ml / 100 g or less.

[0041] The average particle size of component (B) is preferably 5 μm or more, more preferably 10 μm or more, and preferably 200 μm or less, more preferably 100 μm or less. This average particle size is calculated on a volume basis and is a value measured using a laser diffraction flow distribution analyzer: LA-920 (manufactured by Horiba, Ltd.).

[0042] From the viewpoint of miscibility, the specific surface area of ​​component (B) is preferably 50 m 2 / g or more, more preferably 100m 2 / g or more, and from the viewpoint of oil absorption capacity, preferably 300m 2 / g or less, more preferably 200m 2 This specific surface area was measured using a fully automatic specific surface area measuring device, Macsorb HM-model 1201 (manufactured by Mountec Co., Ltd.).

[0043] The amorphous silica of component (B) can be, for example, synthetic amorphous silica commercially available as Nipsil NS-K (manufactured by Tosoh Silica Corporation). Here, amorphous silica refers to silica that has a network structure of Si-O and does not have a fixed crystalline structure.

[0044] <Composition and other components of the powdery thickener composition of the present invention> The content of component (A) in the powdery thickener composition of the present invention is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and even more preferably 5.0% by mass or more, from the viewpoint of thickening properties, and is preferably 60% by mass or less, more preferably 40% by mass or less, and even more preferably 20% by mass or less, from the viewpoint of the flowability of the powdery thickener composition.

[0045] The content of component (B) in the powdery thickener composition of the present invention is preferably 10% by mass or more, more preferably 20% by mass or more, and even more preferably 30% by mass or more, from the viewpoint of the fluidity of the powdery thickener composition, and is preferably 70% by mass or less, more preferably 60% by mass or less, and even more preferably 50% by mass or less, from the viewpoint of thickening properties.

[0046] The ratio (A) / (B) of the content of the (A) component to the (B) component is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 20% by mass or more, from the viewpoint of thickening properties, and is preferably 300% by mass or less, more preferably 150% by mass or less, and even more preferably 75% by mass or less, from the viewpoint of the flowability of the powdery thickener composition.

[0047] The powdery thickener composition of the present invention may optionally contain (C) an anionic aromatic compound (hereinafter referred to as component (C)) in order to achieve a better rheology-modifying effect over a wide temperature range. Component (C) may be one or more compounds selected from sulfonic acids having an aromatic ring, carboxylic acids having an aromatic ring, phosphonic acids having an aromatic ring, or salts thereof. Examples of salts of component (C) include alkali metal salts such as sodium salts and potassium salts, and alkaline earth metal salts such as calcium salts. Component (C) is preferably an acid-type compound having a total carbon number of 6 to 12. Specific examples of component (C) include salicylic acid, p-toluenesulfonic acid, sulfosalicylic acid, benzoic acid, m-sulfobenzoic acid, p-sulfobenzoic acid, 4-sulfophthalic acid, 5-sulfoisophthalic acid, p-phenolsulfonic acid, m-xylene-4-sulfonic acid, cumenesulfonic acid, methylsalicylic acid, styrenesulfonic acid, and chlorobenzoic acid. These may form salts. Two or more types of component (C) may be used. Component (C) is preferably one or more compounds selected from sulfonic acids having an aromatic ring, carboxylic acids having an aromatic ring, and salts thereof.

[0048] When the powdery thickener composition of the present invention contains component (C), the content of component (C) in the powdery thickener composition is preferably 1.0 mass% or more, more preferably 1.5 mass% or more, and even more preferably 2.0 mass% or more from the viewpoint of thickening properties, and is preferably 10.0 mass% or less, more preferably 7.5 mass% or less, and even more preferably 5.0 mass% or less from the viewpoint of storage stability.

[0049] The powdery thickener composition of the present invention may optionally contain (D) a water-soluble polymer compound (hereinafter referred to as component (D)). Component (D) includes (D1) nonionic polymer compounds such as polyalkylene glycols, polyvinyl alcohols, polyvinylpyrrolidone, and alcohol alkoxylates, and (D2) cationic polymer compounds such as polyamidepolyamine / epichlorohydrin condensates, dimethylamine / ammonia / epichlorohydrin condensates, dimethylamine / trimethylamine / epichlorohydrin condensates, vinylpyrrolidone / quaternized dimethylaminoethyl methacrylate copolymers, quaternized polyethyleneimines to which a polyoxyalkylene group may be added, and vinylpyrrolidone / alkylaminoacrylate copolymers. The polyvinyl alcohol may be a fully saponified polyvinyl alcohol or a partially unsaponified polyvinyl alcohol, for example, an intermediately saponified polyvinyl alcohol or a partially saponified polyvinyl alcohol, with a partially saponified polyvinyl alcohol being preferred. The alcohol alkoxylate may be an ether compound having a hydrocarbon group, preferably a hydrocarbon group having from 10 to 22 carbon atoms, and a polyoxyalkylene group having an average addition molar number of from 9 to 5,000. From the viewpoint of versatility, component (D) is preferably one or more polymeric compounds selected from polyalkylene glycol, polyvinyl alcohol, and polyvinylpyrrolidone, more preferably polyalkylene glycol and polyvinyl alcohol, and even more preferably polyethylene glycol, polypropylene glycol, a copolymer of ethylene oxide and propylene oxide, and polyvinyl alcohol. In the component (D), the water-soluble nature of the compound means that 1 g or more of the compound dissolves in 100 g of water at 20°C.

[0050] From the viewpoint of versatility, the weight-average molecular weight of component (D) is preferably 500 or more, more preferably 1,000 or more, and even more preferably 2,000 or more, and from the viewpoint of rheology-modifying effect, it is preferably 200,000 or less, more preferably 150,000 or less, even more preferably 100,000 or less, still more preferably 30,000 or less, and even more preferably 5,000 or less. The weight-average molecular weight of component (D) was measured by gel permeation chromatography (GPC) under the following conditions. *GPC conditions Apparatus: GPC (HLC-8320GPC) manufactured by Tosoh Corporation Column: G4000PWXL + G2500PWXL (Tosoh Corporation) Eluent: 0.2M phosphate buffer / CH3CN=9 / 1 Flow rate: 1.0mL / min Column temperature: 40℃ Detection: RI Sample size: 0.2 mg / mL Standard substance: Polyethylene glycol equivalent (monodisperse polyethylene glycol: molecular weight 250,000, 145,000, 87,500, 46,000, 24,000)

[0051] When the powdery thickener composition of the present invention contains component (D), the content of component (D) in the composition is preferably 1% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more from the viewpoint of versatility, and is preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less from the viewpoint of thickening properties.

[0052] The powdery thickener composition of the present invention may optionally contain a cement wetting agent, an expanding agent, a waterproofing agent, a retarder, a quick-setting agent, a foaming agent, a foaming agent, a waterproofing agent, a fluidizing agent, a thickener other than the powdery thickener composition of the present invention, a flocculating agent, a drying shrinkage-reducing agent, a strength-enhancing agent, a hardening accelerator, a preservative, an antifoaming agent, a dispersant, water, a solvent, etc. The water may be water that is mixed in during the production of component (A).

[0053] The powdered thickener composition of the present invention may be a powdered thickener composition for a slurry. The slurry may be a hydraulic composition, that is, the powdery thickener composition of the present invention may be a powdery thickener composition for a hydraulic composition. The powdery thickener composition of the present invention may also be a powdery thickener composition for cement milk.

[0054] The powdery thickener composition of the present invention can be produced, for example, by mixing a liquid component containing component (A) with component (B). The liquid component containing component (A) may be a composition containing component (A) and water.

[0055] <Slurry Composition> The present invention provides a slurry composition containing the powdery thickener composition of the present invention, water, and a powder. The slurry composition of the present invention is a slurry composition containing a powdery thickener composition, water, and a powder, The powdery thickener composition contains (A) two or more compounds represented by the general formula (1) [hereinafter also referred to as compound (1)], and (B) an inorganic powder, The two or more compounds of (A) have different X's in the general formula (1), and at least one of the two or more compounds has R of X's in the general formula (1). 1a or R 1b is a compound having an alkenyl group. The powdery thickener composition may be a powdery thickener composition in which component (A) is supported on component (B). The matters described for the powdery thickener composition of the present invention can be applied appropriately to the slurry composition of the present invention.

[0056] Examples of the powder include inorganic powders. Examples of the inorganic powder include, but are not limited to, the following. Among the inorganic powders, a hydraulic powder is used to form a hydraulic slurry composition. The powder preferably contains a hydraulic powder. (1) Hydraulic powders such as cement and gypsum (2) Powders with pozzolanic properties such as fly ash, silica fume, volcanic ash, and clay silicate (3) Latent hydraulic powders such as coal ash, blast furnace slag, and diatomaceous earth (4) Silicates such as kaolin, aluminum silicate, clay, talc, mica, calcium silicate, sericite, and bentonite (5) Carbonates such as calcium carbonate, magnesium carbonate, barium carbonate, and basic lead carbonate (6) Sulfates such as calcium sulfate and barium sulfate (7) Chromates such as strontium chromate and pigment yellow (8) Molybdates such as zinc molybdate, calcium zinc molybdate, and magnesium molybdate (9) Metal oxides such as alumina, antimony oxide, titanium oxide, cobalt oxide, triiron tetroxide, diiron trioxide, trilead tetroxide, lead monoxide, chromium oxide green, tungsten trioxide, and yttrium oxide (10) Metal hydroxides such as aluminum hydroxide, magnesium hydroxide, calcium hydroxide, iron hydroxide, and metatitanic acid (11) Metal carbides such as silicon carbide, tungsten carbide, boron carbide, and titanium carbide (12) Other inorganic powders not classified in (1) to (11) above, such as aluminum nitride, silicon nitride, boron nitride, zirconia, barium titanate, satin white, carbon black, graphite, chrome yellow, mercury sulfide, ultramarine, Paris blue, titanium yellow, chrome vermilion, lithopone, copper acetoarsenite, nickel, silver, palladium, and lead zirconate titanate.

[0057] In the slurry composition of the present invention, the content of the powdery thickener composition of the present invention is, relative to 100 parts by mass of water in the slurry composition, preferably 0.5 parts by mass or more, more preferably 1.0 parts by mass or more, even more preferably 1.5 parts by mass or more, still more preferably 2.0 parts by mass or more from the viewpoint of thickening ability, and preferably 15.0 parts by mass or less, more preferably 12.0 parts by mass or less, even more preferably 9.0 parts by mass or less, still more preferably 6.0 parts by mass or less from the viewpoint of handleability. The water here refers to the water in the aqueous phase of the slurry composition.

[0058] In the slurry composition of the present invention, the total content of compound (1) is preferably 0.02 parts by mass or more, more preferably 0.03 parts by mass or more, even more preferably 0.04 parts by mass or more, still more preferably 0.05 parts by mass or more, and preferably 8.00 parts by mass or less, more preferably 4.00 parts by mass or less, even more preferably 2.00 parts by mass or less, still more preferably 1.00 parts by mass or less, and still more preferably 0.50 parts by mass or less, per 100 parts by mass of water, from the viewpoint of obtaining practically sufficient viscoelasticity. The water referred to here is the water in the aqueous phase of the slurry composition.

[0059] When the slurry composition of the present invention contains the compound (1a) and the compound (1b), the content of the compound (1a) is preferably 0.01 part by mass or more, more preferably 0.02 part by mass or more, and even more preferably 0.03 part by mass or more, relative to 100 parts by mass of water, from the viewpoint of obtaining high viscoelasticity over a wide range of temperatures, and is preferably 4.00 parts by mass or less, more preferably 2.00 parts by mass or less, and even more preferably 1.00 parts by mass or less, from the viewpoint of handleability. The water referred to here is the water in the aqueous phase of the slurry composition. When the slurry composition of the present invention contains the compound (1a) and the compound (1b), the content of the compound (1b) is preferably 0.01 part by mass or more, more preferably 0.02 part by mass or more, and even more preferably 0.03 part by mass or more, relative to 100 parts by mass of water, from the viewpoint of obtaining high viscoelasticity over a wide range of temperatures, and is preferably 4.00 parts by mass or less, more preferably 2.00 parts by mass or less, and even more preferably 1.00 parts by mass or less, from the viewpoint of handleability. The water referred to here is water in the aqueous phase of the slurry composition. In the slurry composition of the present invention, it is preferred that the total content of compound (1a) and compound (1b) is within a predetermined range, and that the content of each of compound (1a) and compound (1b) is within a predetermined range.

[0060] The slurry composition of the present invention may contain the aforementioned component (C). In this case, the content of component (C) is preferably 0.001 part by mass or more, more preferably 0.005 part by mass or more, even more preferably 0.01 part by mass or more, and preferably 5.00 parts by mass or less, more preferably 3.00 parts by mass or less, even more preferably 1.5 parts by mass or less, still more preferably 0.80 parts by mass or less, still more preferably 0.40 parts by mass or less, still more preferably 0.20 parts by mass or less, and still more preferably 0.10 parts by mass or less, per 100 parts by mass of water in the slurry composition. The water referred to here is the water in the aqueous phase of the slurry composition.

[0061] The slurry composition of the present invention may contain the aforementioned component (D). In this case, the content of component (D) is preferably 0.05 parts by mass or more, more preferably 0.10 parts by mass or more, even more preferably 0.20 parts by mass or more, and preferably 4.00 parts by mass or less, more preferably 2.00 parts by mass or less, even more preferably 1.00 parts by mass or less, per 100 parts by mass of water in the slurry composition. The water referred to here is water in the aqueous phase of the slurry composition.

[0062] In the slurry composition of the present invention, the water / powder ratio (W / P), which is the mass ratio of water (W) to powder (P), is preferably 40 mass% or more, more preferably 45 mass% or more, even more preferably 50 mass% or more, and even more preferably 55 mass% or more from the viewpoint of handleability, and is preferably 200 mass% or less, more preferably 150 mass% or less, and even more preferably 100 mass% or less from the viewpoint of material separation resistance. Here, the water / powder ratio (W / P) is the mass percentage (mass%) of water and powder in the slurry composition, and is calculated by water / powder x 100. Note that, since the amount of powdery thickener composition contained in the slurry composition is minute compared to the amount of powder in the slurry composition, this water / powder ratio (W / P) does not include the powdery thickener composition of the present invention (the same applies hereinafter).

[0063] [Hydraulic Slurry Composition] The slurry composition of the present invention may be a hydraulic slurry composition, which will be described below. The present invention provides a hydraulic slurry composition containing the powdery thickener composition of the present invention, water, and a hydraulic powder. That is, the hydraulic slurry composition of the present invention contains the powdery thickener composition of the present invention, water, and a hydraulic powder.

[0064] The hydraulic slurry composition of the present invention can be appropriately applied to the matters described for the powdery thickener composition and slurry composition of the present invention. The preferred content of each component in the hydraulic composition is the same as the preferred content of each component in the slurry composition.

[0065] The hydraulic powder used in the hydraulic slurry composition of the present invention is a powder that hardens when mixed with water, and examples thereof include ordinary Portland cement, high-early-strength Portland cement, ultra-high-early-strength Portland cement, sulfate-resistant Portland cement, low-heat Portland cement, Examples of suitable cement include white Portland cement and ecocement (e.g., JIS R5214, etc.). Among these, from the viewpoint of shortening the time required for the hydraulic slurry composition to reach the required strength, cement selected from high-early-strength Portland cement, ordinary Portland cement, sulfate-resistant Portland cement, and white Portland cement is preferred, and cement selected from high-early-strength Portland cement and ordinary Portland cement is more preferred.

[0066] The hydraulic powder may include blast furnace slag, fly ash, silica fume, anhydrous gypsum, etc., or may include non-hydraulic limestone fine powder, etc. As the hydraulic powder, blast furnace cement, fly ash cement, or silica fume cement, which is a mixture of cement with blast furnace slag, fly ash, silica fume, etc., may be used.

[0067] The hydraulic slurry composition of the present invention preferably contains aggregate. Examples of aggregate include fine aggregate and coarse aggregate. The fine aggregate is preferably mountain sand, land sand, river sand, or crushed sand, and the coarse aggregate is preferably mountain gravel, land gravel, river gravel, or crushed stone. Depending on the application, lightweight aggregate may also be used. The term aggregate is based on "Concrete General Guide" (published by Gijutsu Shoin, June 10, 1998).

[0068] The hydraulic slurry composition may contain other components in addition to compound (1) to the extent that the effects of the present invention are not affected, such as the aforementioned components (C) and (D), dispersants, air-entraining agents, retarders, foaming agents, thickeners, foaming agents, waterproofing agents, fluidizing agents, and antifoaming agents.

[0069] In the hydraulic slurry composition of the present invention, the water / hydraulic powder ratio (W / P), which is the mass ratio of water (W) to hydraulic powder (P), is preferably 40 mass% or more, more preferably 45 mass% or more, even more preferably 50 mass% or more, and still more preferably 55 mass% or more, from the viewpoint of ensuring the fluidity of the hydraulic slurry composition, and is preferably 200 mass% or less, more preferably 150 mass% or less, and even more preferably 100 mass% or less, from the viewpoint of ensuring the hydraulic properties of the hydraulic slurry composition. Here, the water / hydraulic powder ratio (W / P) is the mass percentage (mass%) of water and hydraulic powder in the hydraulic slurry composition, and is calculated as water / hydraulic powder x 100. The water / hydraulic powder ratio is calculated based on the amount of powder that has the physical property of hardening through a hydration reaction. Furthermore, when the hydraulic powder is cement, W / P may be expressed as W / C. In addition, when the hydraulic powder includes powders selected from powders with pozzolanic action, powders with latent hydraulic properties, and stone powder (calcium carbonate powder) in addition to powders such as cement that harden through hydration, the amounts of these powders are also included in the amount of hydraulic powder in this invention. Furthermore, when the powder that hardens through hydration contains a high-strength admixture, the amount of the high-strength admixture is also included in the amount of hydraulic powder. This also applies to other parts by mass that involve the mass of the hydraulic powder.

[0070] <Method for producing slurry composition> The present invention provides a method for producing a slurry composition, which comprises mixing the powdery thickener composition of the present invention, water, and a powder. The method for producing the slurry composition of the present invention may be a method for producing a slurry composition by mixing the powdery thickener composition of the present invention into a slurry prepared by mixing water and powder. The method for producing a slurry composition of the present invention may be a method for producing a slurry composition, which comprises mixing a powdery thickener composition, which is a premix of a liquid composition containing component (A) and component (B), with water and a powder. The powder may be a hydraulic powder. The methods for producing the slurry composition of the present invention can be appropriately applied to the powdery thickener composition and the slurry composition of the present invention. The preferred contents of the slurry composition of the present invention can be substituted for the preferred blending amounts in the method for producing the slurry composition of the present invention.

[0071] The method for producing the slurry composition of the present invention preferably involves preparing a slurry containing water and a powder in advance, adding the powdery thickener composition of the present invention to the slurry, and mixing them to produce the slurry composition. The powdery thickener composition of the present invention may be a powdery thickener composition in which component (A) is supported on component (B).

[0072] The slurry composition of the present invention and the slurry composition obtained by the method for producing a slurry composition have improved rheology over a wide temperature range. The slurry composition of the present invention and the method for producing a slurry composition are useful, for example, as a hydraulic slurry composition and a method for producing a hydraulic slurry composition.

[0073] <Filling method> The present invention provides a filling method using the slurry composition of the present invention. The filling method of the present invention may be, for example, a void filling method, a gap filling method, a backfilling method, a crack repair method, a pile perimeter fixing method, or a pile extraction method. The filling method of the present invention may be, for example, a filling method in which the ground is excavated down to the bearing layer using a drilling and stirring rod, and then the slurry composition of the present invention is injected into the excavated hole. In the filling method of the present invention, the slurry composition of the present invention can be used as a foot protection liquid or a pile periphery fixing liquid. The slurry composition of the present invention may be a hydraulic composition, i.e., the hydraulic slurry composition of the present invention.

[0074] <Method for improving homogeneity of slurry composition> The present invention provides a method for improving the homogeneity of a slurry, which comprises adding the powdery thickener composition of the present invention to a slurry containing a powder and water. The slurry may be a hydraulic composition. The powdery thickener composition may be a powdery thickener composition in which component (A) is supported on component (B). The matters described in relation to the powdery thickener composition, the slurry composition and the method for producing the slurry composition of the present invention can be applied as appropriate to the method for improving homogeneity of the present invention. [Example]

[0075] <Example 1 and Comparative Example 1> In Example 1 and Comparative Example 1, the following (A) amphoteric surfactant, (B) inorganic powder, (C) anionic aromatic compound, (D) water-soluble polymer compound, and other components were used.

[0076] (1) Compounds used in the preparation of the powdery thickener composition <(A) Amphoteric surfactant> (a-1): oleyldimethylamine oxide (in general formula (1a), R 11a : Alkenyl group with 18 carbon atoms (oleyl group), n1: 0, R 2 : Methyl group, R 3 : methyl group) (a-2): Oleic acid amide propyl dimethylamine oxide (in general formula (1a), R 11a : Alkenyl group having 17 carbon atoms, n1:1, R 2 : Methyl group, R 3 : methyl group) (a-3): stearyl dimethylamine oxide (in general formula (1a), R 11a : alkyl group with 18 carbon atoms (stearyl group), n1: 0, R 2 : Methyl group, R 3 : methyl group) <(A') Comparative Amphoteric Surfactant> (a'-1): octyldimethylamine oxide (in the general formula (1a), R11a: an alkyl group having 8 carbon atoms (octyl group), n1: 0, R 2 : Methyl group, R 3 : methyl group) The components (A) and (A') used were compositions containing 30% by mass of effective solid content and water.

[0077] <(B) Inorganic powder> (b-1): Silica powder, Nipsil NS-K (manufactured by Tosoh Silica Corporation) (b-2): Ground blast furnace slag, Esment 4000 (manufactured by Nippon Steel Blast Furnace Cement Co., Ltd.)

[0078] <(C) Anionic aromatic compounds> (c-1): Sodium meta-xylene sulfonate monohydrate crystals, SXS-Y (manufactured by Itochu Chemical Frontier Corporation) <(D) Water-soluble polymer> (d-1): Polyethylene glycol 4,000 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), average molecular weight 2,700 to 3,300 ·(d-2):Poly(ethyleneoxide) average MV 200,000,powder(Merck KGaA) <Other ingredients> · Tap water (Wakayama City, Wakayama Prefecture) Propylene glycol (Fujifilm Wako Pure Chemical Industries, Ltd.)

[0079] <Comparative powder thickener> MC: Methylcellulose, Metrose SM-4000 (Shin-Etsu Chemical Co., Ltd.) HPMC: Hydroxypropyl methylcellulose, Metolose 90SH-4000 (Shin-Etsu Chemical Co., Ltd.) HEMC: Hydroxyethyl cellulose, PMC-50UF (LOTTEChemical Corporation)

[0080] (2) Preparation of powdered thickener composition A powdered thickener composition was produced by adding the above components (B), (C), and (D) to a coffee mill GCM-56 (Device Style Holdings) in the proportions shown in Table 1, then adding component (A) and other components, and mixing for 1 minute until the powder became homogeneous. The powdered thickener composition used in the test was passed through a sieve with 600 μm openings.

[0081] (3) Preparation of slurry Ordinary Portland cement (specific gravity 3.16, manufactured by Taiheiyo Cement Corporation) was charged as hydraulic powder into a Hobart-type mixer according to JIS R 5201, and then tap water (specific gravity 1.00, tap water from Wakayama City, Wakayama Prefecture) was added as water, and the mixture was kneaded at 62 rpm for 1 minute to prepare a slurry. The hydraulic powder and water used were in the parts by mass shown in Table 1.

[0082] (4) Method of adding powdered thickener composition Next, the powdered thickener composition prepared by the method described in (2) or the comparative powdered thickener was added to the slurry prepared by the method described in (3) and kneaded for another minute to obtain a slurry composition modified with the powdered thickener composition or the comparative powdered thickener.

[0083] (5) Evaluation method for homogeneity Next, the slurry composition prepared by the method described in (4) was sampled and spread on a sieve with 1.18 mm openings, and the slurry composition was passed through a sieve with 1.18 mm openings by shaking for 1 minute using a shaker MVS-1N (manufactured by AS ONE Corporation). The weight of the slurry composition was measured, and the sieve passing rate (%) through the 1.18 mm openings was calculated based on the following formula. The results are shown in Table 1. The sieve passing rate was calculated three times, and the average value of the three calculations is shown in Table 1. Sieve passing rate (%) with 1.18 mm openings = [weight (g) of slurry composition that passed through the sieve × 100] / [total weight (g) of the slurry composition that was passed through the sieve]

[0084] (6) Method for measuring viscosity of slurry composition The slurry composition prepared by the method described in (5) was sampled in a 500 mL disposable cup, and the viscosity of the slurry composition was measured at 20°C using a Brookfield viscometer (RION Corporation, VISCO TESTER VT-04E, rotor No. 1, rotation speed: 62.5 rpm). The results are shown in Table 1.

[0085] (7) Strength measurement of the hardened slurry composition Using the slurry composition prepared by the method described in (5), specimens were prepared according to the method described in JSCE-F504-1999, and the unconfined compressive strength of the specimens at 28 days was measured and recorded according to the method described in JSCE-G 505-2010. The results are shown in Table 1.

[0086] [Table 1]

[0087] *1: The column for component (A) also lists comparative component (a'-1), which is not included in component (A). In addition, the blending amounts of component (a-1), component (a-2), and component (a'-1) in the table indicate the blending amounts in a composition containing 30% by mass of effective solids and water. *2: Other ingredients include water:propylene glycol in a 1:1 mass ratio. *3: Parts by mass relative to 100 parts by mass of water contained in the slurry composition. *4: Comparative Example 1-11 was prepared by mixing component (A) and component (B) separately into a slurry composition.

[0088] As shown in Table 1, Examples 1-1 to 1-12 showed a higher sieve passing rate than Comparative Examples 1-1 to 1-5, 1-7 to 1-9, and 1-11. This is thought to be because the inclusion of an amphoteric surfactant in the powdery thickener composition promoted wetting of the powdery thickener composition surface with water, reducing the electrostatic attraction between powdery thickener compositions, improving the dispersibility of the powdery thickener composition and suppressing the formation of splices or gels in the slurry composition.

[0089] As shown in Table 1, Examples 1-1 to 1-12 exhibited superior sieve passage rates and 28-day unconfined compressive strengths to Comparative Examples 1-1 to 1-2, 1-4 to 1-9, and 1-11. This is thought to be because the formation of splices or gels in the slurry composition was suppressed by the above-mentioned mechanism, improving the homogeneity of the hardened body of the slurry composition and reducing uneven stress during the compression test.

Claims

1. A powdery thickener composition comprising (A) two or more amphoteric surfactants represented by the following general formula (1) [hereinafter referred to as component (A)], and (B) an inorganic powder, wherein component (A) comprises compound (11a) represented by the following general formula (11a) and compound (1b) represented by the following general formula (1b), and component (A) is supported on component (B). 【Chemistry 1】 [Wherein X is R １ａ or R １ｂ -[CONH-CH ２ CH ２ CH ２ ] ｎ - is a group represented by R １ａ is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. １ｂ is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. n is an integer of 1 to 3. ２ and R ３ are each independently an alkyl group having 1 to 4 carbon atoms or -(C ２ H ４ O) ｐ H. p is the average number of moles added, and R ２ and R ３ The sum of these is a number between 0 and 5. 【Chemistry 2】 [During the ceremony, n2 is an integer of 1 or more and 3 or less. R 11a is an alkenyl group having 14 to 22 carbon atoms. R 11b is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. R 2 and R 3 are each independently an alkyl group having 1 to 4 carbon atoms or a group represented by —(C 2 H 4 O) pH. p is the average number of moles added, and the total of R 2 and R 3 is a number of 0 to 5.

2. The powdered thickener composition of claim 1 for use in a slurry.

3. 3. The powdered thickener composition of claim 2, wherein the slurry is a hydraulic composition.

4. The powdery thickener composition according to any one of claims 1 to 3, further comprising (C) an anionic aromatic compound.

5. The powdery thickener composition according to any one of claims 1 to 4, further comprising (D) a water-soluble polymer compound.

6. The powdery thickener composition according to any one of claims 1 to 5, which is for use in cement milk.

7. A slurry composition comprising the powdery thickener composition according to any one of claims 1 to 6, water, and a powder.

8. The slurry composition according to claim 7, wherein the mass ratio (W / P) of water (W) to powder (P) is 40 mass% or more and 200 mass% or less.

9. A method for producing a slurry composition, comprising mixing the powdery thickener composition according to any one of claims 1 to 6, water, and a powder.

10. The method for producing a slurry composition according to claim 9, wherein a mass ratio (W / P) of water (W) to powder (P) is 40 mass% or more and 200 mass% or less.

11. The powdery thickener composition is a powdery thickener composition obtained by mixing a liquid composition containing component (A) with component (B), The method for producing a slurry composition according to claim 9 or 10, wherein the powdery thickener composition is added to a slurry containing a powder and water.

12. A method for improving the homogeneity of a slurry, comprising adding the powdery thickener composition according to any one of claims 1 to 6 to a slurry containing a powder and water.

13. The method for improving the homogeneity of a slurry according to claim 12, wherein the slurry is a hydraulic composition.

14. A filling method using the slurry composition according to claim 7 or 8.

15. The filling method according to claim 14, wherein the ground is excavated down to a bearing layer using a drilling and stirring rod, and then the slurry composition is injected into the excavated hole.

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