Thickening agent composition

Abstract

When amine oxide-type surfactants are used as thickeners, the inclusion of air bubbles can lead to a decrease in the strength of the slurry of hydraulic compositions. Therefore, as described above, silicone-based defoamers are added. However, the hydrophilic thickener and hydrophobic defoamer gradually separate after manufacturing, causing the performance of each thickener and defoamer to deteriorate over time. For this reason, there is a need for a thickener composition that does not separate from the defoamer and maintains uniformity over a long period of time, exhibiting excellent storage stability. [Solution] A thickening agent composition containing (A) component: amine oxide type surfactant and (B) component: fatty acid glyceride is provided.

Description

[Technical Field]

[0001] This invention relates to a thickening agent composition. [Background technology]

[0002] Hydraulic compositions containing hydraulic powders such as cement may contain thickeners to improve the physical properties of the hydraulic composition after preparation, such as viscosity and resistance to material separation.

[0003] For example, Patent Document 1 discloses a thickening agent containing an amine oxide-type surfactant and a silicone-based defoaming agent. Furthermore, Patent Document 2 discloses a thickening agent composition for hydraulic compositions, which contains (a) an alkylnaphthalene sulfonic acid with an alkyl group having 2 or more carbon atoms, or a salt thereof (hereinafter referred to as component (a)), and (b) one or more selected from amphoteric surfactants and cationic surfactants (hereinafter referred to as component (b)), and a silicone-based defoaming agent. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-61318 [Patent Document 2] Japanese Patent Publication No. 2024-37207 [Overview of the project] [Problems that the invention aims to solve]

[0005] When amine oxide-type surfactants are used as thickeners, the inclusion of air bubbles can lead to a decrease in the strength of the slurry of hydraulic compositions. Therefore, as described above, silicone-based defoamers are added. However, the hydrophilic thickener and hydrophobic defoamer gradually separate after manufacturing, causing the performance of each thickener and defoamer to deteriorate over time. For this reason, there is a need for a thickener composition that does not separate from the defoamer and maintains uniformity over a long period of time, exhibiting excellent storage stability. [Means for solving the problem]

[0006] In order to solve the above problems, the inventors conducted thorough research and found a thickening agent composition that has excellent storage stability and good defoaming properties by using an amine oxide-type surfactant as a thickening agent and a fatty acid glyceride as an antifoaming agent. In other words, the present invention is (A) Components: Amine oxide type surfactant, and (B) Ingredients: Fatty acid glycerides, This relates to a thickening agent composition containing the above. Furthermore, the present invention is (A) Ingredients: Amine oxide type surfactant, (B) Components: fatty acid glycerides, The present invention relates to a method for producing a thickening agent composition, comprising the steps of: mixing a mixture of water at a temperature above the melting point of component (B) to obtain a solution; and crystallizing component (B) in the obtained solution. Furthermore, the present invention relates to a hydraulic composition containing a hydraulic powder, water, and a thickening agent composition. Furthermore, the present invention relates to a hydraulic composition containing hydraulic powder and water, (A) Components: Amine oxide type surfactant, and (B) Ingredients: Fatty acid glycerides, This invention relates to a method for suppressing foaming of a hydraulic composition by mixing it with a thickening agent composition containing [a specific substance]. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a thickening agent composition that has excellent storage stability and good defoaming properties. [Modes for carrying out the invention]

[0008] <(A) Ingredient: Amine oxide type surfactant> The thickening agent composition of the present invention contains one or more amine oxide type surfactants as component (A). From the viewpoint of high thickening performance, the following general formula (1) is used as the amine oxide type surfactant. [Chemical formula] [In the formula, X is R 1a or R 1b -[CONH-CH2CH2CH2] n -represents a group. R 1a represents an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. R 1b represents an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. n represents an integer of 1 or more and 3 or less. R 2 and R 3 each independently represents an alkyl group having 1 to 4 carbon atoms or a group represented by -(C2H4O) p H. p represents the average number of moles of ethyleneoxy groups added, and the total of the groups represented by -(C2H4O) 2 and R 3 contained in R p H is an integer of 0 or more and 5 or less. ] The amine oxide represented by is preferred.

[0009] In the present invention, the component (A) is one or more compounds represented by the general formula (1) [hereinafter also referred to as compound (1)]. In the case of two or more compounds, X in the general formula (1) is different, and among the two or more compounds, at least one is R 1a or R 1b in the general formula (1) is preferably a compound having an alkenyl group. Hereinafter, this aspect will be described.

[0010] Regarding compound (1), that X in the general formula (1) is different means, taking the case where there are two compounds (1) as an example, for example, the following aspects can be mentioned. In the following aspects, among the two compounds (1), R 1a or R 1b of at least one of the compounds (1) is an alkenyl group. (i) One of R 1a or R 1b is an alkyl group, and the other R 1aor R 1b This is an alkenyl group. (ii) R 1a or R 1b The number of carbon atoms in the other R 1a or R 1b The number of carbon atoms is different. (iii) If one X is R 1a And the other X is R 1b -[CONH-CH2CH2CH2] n - is (iv) X is both R 1b -[CONH-CH2CH2CH2] n - and one n is different from the other n. (v) A combination of (i) to (iv) above.

[0011] In general formula (1), X is R 1a or R 1b -[CONH-CH2CH2CH2] n It is a base represented by -. R 1a R is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. 1a When is an alkenyl group, the number of carbon atoms is preferably 18 or more, and preferably 22 or less, R 1a When it is an alkyl group, the number of carbon atoms is preferably 16 or more, and preferably 22 or less. R 1b R is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. 1b When it is an alkenyl group, the number of carbon atoms is preferably 17 or more, and preferably 21 or less, R 1b When it is an alkyl group, the number of carbon atoms is preferably 15 or more, and preferably 21 or less. n is an integer between 1 and 3, preferably 1. R 2 and R 3 Each is independently preferably an alkyl group having 1 to 2 carbon atoms or (C2H4O) p The base is represented by H. p is an integer between 0 and 5, preferably 1 or 2.

[0012] In this invention, two or more compounds (1) with different X in general formula (1) are used, preferably five or fewer, and more preferably two. At least one of the two or more compounds (1) used in this invention has R in general formula (1) 1a or R 1b A compound having an alkenyl group with 14 to 22 carbon atoms, that is, R in X in general formula (1) 1a as an alkenyl group having 14 to 22 carbon atoms or R 1b It is a compound containing an alkenyl group with 13 to 21 carbon atoms.

[0013] In this invention, there are two types of compound (1), and of the two types of compound (1), including (i) to (v) above, one of them is such that X in general formula (1) is R 1a Preferably, the compound is an alkenyl group having 14 to 22 carbon atoms. That is, component (A) is two types of compounds represented by the general formula (1), the two types of compounds differ in X in the general formula (1), and of the two types of compounds, one of which has X in the general formula (1) as R 1a And R 1a It is preferable that the compound is an alkenyl group.

[0014] (A) As a component, X in general formula (1) is R 1a or R 1b -[CONH-CH2CH2CH2] n Examples include a compound (1a) which has a group represented by - and a compound (1b) which is different from compound (1a) in that X in general formula (1). (A) Specifically, the components include a combination of compound (1a) represented by the following general formula (1a) and compound (1b) represented by the following general formula (1b). [ka] TIFF2026089031000003.tif38170 [In the formula, n1 and n2 each represent independent integers between 0 and 3, inclusive. R11a When n1 is 0, it represents an alkenyl group with 14 to 22 carbon atoms, and when n1 is 1 to 3, it represents an alkenyl group with 13 to 21 carbon atoms. 11b When n2 is 0, it represents 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 represents an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. However, when n1 and n2 are the same number, R 11b The alkenyl group is R 11a It is a different alkenyl group. 2 and R 3 This indicates the same content as above.

[0015] In general formula (1a), R 11a The number of carbon atoms is preferably 17 or more, and preferably 22 or less. In general formula (1a), n1 is preferably 0 or 1, more preferably 0.

[0016] In general formula (1b), when n² is 0, R 11b If R is an alkyl group, 11b The number of carbon atoms is preferably 16 or more, and preferably 22 or less. In general formula (1b), when n² is 0, R 11b If R is an alkenyl group, 11b The number of carbon atoms is preferably 18 or more, and preferably 22 or less. In general formula (1b), n² is 1 to 3 and R 11b If R is an alkyl group, 11b The number of carbon atoms is preferably 15 or more, and preferably 21 or less. In general formula (1b), n² is 1 to 3 and R 11b If R is an alkenyl group, 11b The number of carbon atoms is preferably 17 or more, and preferably 21 or less. In general formula (1b), R 11b Alkyl alkyl groups are preferred. In general formula (1b), n2 is preferably 0 or 1.

[0017] In general formula (1a) or (1b), R 2 and R 3 Each is independently preferably a C1 or C2 alkyl group or -(C2H4O) p The group is represented by H, and more preferably by an alkyl group having 1 or 2 carbon atoms. In general formula (1a) or (1b), p is preferably a number between 0 and 3. If n1 and n2 are the same number, R 11b The alkenyl group is R 11a It is a different alkenyl group.

[0018] The (A) component of the present invention includes a combination of compound (11a) represented by the following general formula (11a) and compound (1b) represented by the following general formula (1b).

[0019] [ka] TIFF2026089031000005.tif38170 [In the formula, n2, R 11a , R 11b , R 2 and R 3 This indicates the same content as above.

[0020] Compound (11a) represented by general formula (11a) corresponds to the compound in general formula (1a) where n1 is 0. 11a , R 2 and R 3 The preferred embodiment is the same as that of general formula (1a), and as compound (11a), oleyldimethylamine oxide is most preferred from the viewpoint of high viscosity-enhancing performance over a wide temperature range.

[0021] Furthermore, the preferred embodiment of compound (1b) is the same as described above, and from the viewpoint of high viscosity-enhancing performance over a wide temperature range, oleamidopropyldimethylamine oxide is the most preferred compound (1b).

[0022] The content of amine oxide (1) in 100 parts by mass of the thickening agent composition of the present invention is preferably 15 parts by mass or more, more preferably 20 parts by mass or more, and even more preferably 25 parts by mass or more, from the viewpoint of high thickening performance, and from the viewpoint of maintaining a liquid state and being easy to handle, it is preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and even more preferably 35 parts by mass or less.

[0023] When two types of amine oxides, compounds (1a) and (1b), are used in combination as amine oxide (1), the content of compound (1a) in 100 parts by mass of the thickening agent composition is preferably 1 part by mass or more, more preferably 3 parts by mass or more, and even more preferably 5 parts by mass or more, from the viewpoint of high thickening performance over a wide temperature range, and from the same viewpoint, preferably 20 parts by mass or less, more preferably 15 parts by mass or less, and even more preferably 10 parts by mass or less. Furthermore, the content of compound (1b) in 100 parts by mass of the thickening agent composition is preferably 10 parts by mass or more, more preferably 15 parts by mass or more, and even more preferably 20 parts by mass or more, from the viewpoint of high thickening performance over a wide temperature range, and from the same viewpoint, preferably 40 parts by mass or less, more preferably 30 parts by mass or less, and even more preferably 25 parts by mass or less.

[0024] Also, the following formula [Amine oxide (1a) content] / [Amine oxide (1b) content] The mass ratio of the content of amine oxide (1a) to the content of amine oxide (1b), as shown by , is preferably 0.05 or more, more preferably 0.1 or more, and even more preferably 0.2 or more, from the viewpoint of high viscosity-enhancing performance over a wide temperature range, and from the same viewpoint, preferably 2 or less, more preferably 1 or less, and even more preferably 0.5 or less.

[0025] When using either the amine oxide (1) of general formula (1a) or (1b), either compound (1a) or compound (1b) may be used, but from the viewpoint of high viscosity, compound (1b) is preferred. When using two or more compounds (1b) from the amine oxide of general formula (1b), R in general formula (1b) 11b , R 2 , R 3 n2 and p may be different. As the amine oxide of general formula (1b), it is most preferable to use oleamidopropyldimethylamine oxide alone.

[0026] When compound (1b) is used as amine oxide (1), the content of one or more amine oxides of general formula (1b) in 100 parts by mass of the thickening agent composition is preferably 15 parts by mass or more, more preferably 20 parts by mass or more, and even more preferably 25 parts by mass or more, and from the same viewpoint, preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and even more preferably 35 parts by mass or less.

[0027] <(B) component> Component (B) is a fatty acid glyceride. From the viewpoint of improving storage stability through crystal formation, crystalline fatty acid glycerides are preferred, fatty acid glycerides having hydroxyl groups in crystalline aliphatic acyl groups are more preferred, and fatty acid glycerides having aliphatic acyl groups with 14 to 18 carbon atoms in which one or more hydrogen atoms are substituted with hydroxyl groups are even more preferred. The presence of hydroxyl groups in aliphatic acyl groups promotes crystal formation through intermolecular hydrogen bonding between components (B). Furthermore, fatty acid glycerides having hydroxyl groups in aliphatic acyl groups can have up to three aliphatic acyl groups having hydroxyl groups in aliphatic acyl groups. From the viewpoint of promoting crystal formation, the average number of acyl groups in fatty acid glycerides having hydroxyl groups in aliphatic acyl groups is preferably 1 or more, more preferably 2 or more, and even more preferably 2.5 or more. From the viewpoint of the storage stability of the crystals, it is most preferably 3. Furthermore, the iodine value of fatty acid glycerides is preferably 5 g-I2 / 100 g or less, more preferably 4 g-I2 / 100 g or less, more preferably 3 g-I2 / 100 g or less, and more preferably 2 g-I2 / 100 g or less, as this generates crystals of a more uniform size and shape, thereby increasing the viscosity of the thickening agent composition for hydraulic compositions at low shear. The iodine value can be determined according to the method described in JIS K 0070:1992 (Test methods for acid value, saponification value, ester value, iodine value, hydroxyl value, and unsaponifiable matter of chemical products). Crystallinity refers to the property of being solid at room temperature and exhibiting a reversible detection of an endothermic peak (melting point) during temperature increase in differential scanning calorimetry. Crystallinity includes all types of crystals, such as single crystals, perfect crystals, mosaic crystals, polycrystalline materials, and microcrystalline materials. For example, the temperature (melting point) of the peak of the endothermic peak detected at the highest temperature during heating in differential scanning calorimetry of component (B) can be determined using a differential scanning calorimetry (DSC) in the following way. • Sample preparation Measurement sample: (B) 10 mg of component placed in an aluminum pan with a lid and sealed with the lid. Reference: Aluminum pan with the lid on, without any contents inside. ·Measurement method The sample and reference are placed in a TA Instruments DSC (Q2000). The temperature is increased from 30°C to 95°C at a rate of 5°C / min, held at 95°C for 5 minutes, then cooled to 25°C at a rate of 20°C / min, and then increased again to 95°C at a rate of 2°C / min. The temperature of the peak of the highest temperature endothermic peak detected during the second heating cycle is taken as the melting point of component (B). (B) Only one component may be used, and two or more may be used in combination. From the viewpoint of improving storage stability by crystal formation, it is preferable to use hydrogenated castor oil and / or hydrogenated castor oil, which are fatty acid glycerides having a hydroxyl group in a crystalline C18 aliphatic acyl group.

[0028] The melting point of component (B) is preferably 70°C or higher, more preferably 80°C or higher, and from the viewpoint of achieving both good storage stability and crystallinity, preferably 95°C or lower, more preferably 90°C or lower.

[0029] (B) The content of component (B) is preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, and even more preferably 0.15 parts by mass or more, per 100 parts by mass of the thickening agent composition, from the viewpoint of good storage stability, and preferably 10 parts by mass or less, more preferably 5 parts by mass or less, and even more preferably 1 part by mass or less, from the viewpoint of economy and fluidity.

[0030] The content of component (B) in the thickening agent composition of the present invention relative to 100 parts by mass of component (A) is preferably 1.0 part by mass or more, more preferably 1.25 parts by mass or more, from the viewpoint of good dispersibility and crystallinity of component (B) in aqueous solution, and preferably 5.0 parts by mass or less, more preferably 3.0 parts by mass or less, from the same viewpoint.

[0031] The thickening agent composition of the present invention may contain an alcohol as component (C) from the viewpoint of making component (A) liquid, and among these, an alcohol having 2 to 8 carbon atoms is preferred. Specifically, examples include one or more selected from diethylene glycol monobutyl ether, 2-butoxyethanol, ethylene glycol monoisopropyl ether, butanol, 2-methoxyethanol, triethylene glycol monobutyl ether, propylene glycol monobutyl ether, propylene glycol monopropyl ether, 2-dimethylaminoethanol, diethanolamine, 2-methylpentane-2,4-diol, dipropylene glycol, 1,3-butanediol, 1,4-butanediol, diethylene glycol, neopentyl glycol, propylene glycol, glycerin, benzyl alcohol, and ethylene glycol.

[0032] When component (C) is used, the content of component (C) is preferably 10 parts by mass or more, more preferably 20 parts by mass or more, per 100 parts by mass of the thickener composition, from the viewpoint of making component (A) liquid, and preferably 40 parts by mass or less, more preferably 35 parts by mass or less, from the same viewpoint.

[0033] The thickening agent composition of the present invention may contain an antifoaming agent other than component (B) as component (D). That is, from the viewpoint of improving workability through monoliquefaction, it is preferable that the thickening agent composition of the present invention further contains an antifoaming agent (excluding component (B)). (D) As for the defoaming agent that can be used as component, from the viewpoint of defoaming properties, one or more selected from silicone-based defoaming agents, fatty acid ester-based defoaming agents, ether-based defoaming agents, and aliphatic amine-based defoaming agents are preferred, with silicone-based defoaming agents being more preferred. Dimethylpolysiloxane is more preferred among silicone-based defoaming agents, polyalkylene glycol fatty acid ester is more preferred among fatty acid ester-based defoaming agents, polyalkylene glycol alkyl ether is more preferred among ether-based defoaming agents, and alkyldimethylamine or a salt thereof is more preferred among aliphatic amine-based defoaming agents.

[0034] When the thickening agent composition of the present invention contains component (D), from the viewpoint of not inhibiting good defoaming and thickening properties, it is preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, and even more preferably 1.0 part by mass or more, per 100 parts by mass of the thickening agent composition, and from the same viewpoint, it is preferably 10 parts by mass or less, more preferably 7.5 parts by mass or less, and even more preferably 5 parts by mass or less.

[0035] When the thickening agent composition of the present invention contains component (D), the content of component (D) relative to 100 parts by mass of component (A) in the thickening agent composition is preferably 2.5 parts by mass or more, more preferably 5.0 parts by mass or more, from the viewpoint of not inhibiting good defoaming and thickening properties, and preferably 25 parts by mass or less, more preferably 20 parts by mass or less.

[0036] The thickening agent composition of the present invention may contain an anionic aromatic compound as component (E). (E) Component is one or more compounds selected from aromatic compounds having a sulfo group (-S(=O)(OH)2), aromatic compounds having a carboxyl group (-C(=O)OH), aromatic compounds having a phosphono group (-P(=O)(OH)2), or salts thereof, from the viewpoint of improving viscosity. The anionic aromatic compound is preferably an acidic compound with a total carbon number of 6 to 12. Specific examples of anionic aromatic compounds include o-xylenesulfonic acid, m-xylenesulfonic acid, p-xylenesulfonic acid, salicylic acid, p-toluenesulfonic acid, sulfosalicylic acid, benzoic acid, m-sulfobenzoic acid, p-sulfobenzoic acid, 4-sulfophthalic acid, 5-sulfisophthalic acid, p-phenolsulfonic acid, cumenesulfonic acid, methylsalicylic acid, styrenesulfonic acid, and chlorobenzoic acid. These may form salts with alkali metal ions, alkaline earth metal ions, quaternary ammonium ions, etc., as countercations. Two or more anionic aromatic compounds may be used. The anionic aromatic compound is preferably one or more compounds selected from aromatic compounds having a sulfo group, aromatic compounds having a carboxyl group, or salts thereof.

[0037] When component (E) is used, the content of component (E) is preferably 2 parts by mass or more, more preferably 4 parts by mass or more, per 100 parts by mass of the thickening agent composition, from the viewpoint of improving thickening properties, and preferably 10 parts by mass or less, more preferably 8 parts by mass or less, from the viewpoint of economy and fluidity.

[0038] Furthermore, the thickening agent composition of the present invention may optionally contain components such as dispersants, air-entraining agents, retarders, waterproofing agents, and fluidizing agents, to the extent that they do not affect the effects of the present invention.

[0039] The remainder of the thickening agent composition of the present invention, other than components (A) to (E) and any optional components, is preferably water from the viewpoint of economy and safety. The water that can be used is not particularly limited, but deionized water, distilled water, tap water, groundwater, industrial water, etc. can be used. From the viewpoint of obtaining good fluidity, the water content in the thickening agent composition is preferably 10 parts by mass or more, preferably 20 parts by mass or more, and more preferably 30 parts by mass or more, per 100 parts by mass of the thickening agent composition, and from the viewpoint of economy and workability, it is preferably 60 parts by mass or less, more preferably 50 parts by mass or less, and even more preferably 40 parts by mass or less.

[0040] The thickening agent composition of the present invention is <Step 1> A step to obtain a solution by mixing a mixture of component (A), component (B), and water at a temperature above the melting point of component (B). <Step 2> A step to crystallize component (B) in the obtained solution. It can be manufactured by [method].

[0041] When crystallizing component (B) in step 2, it is preferable to lower the temperature to room temperature (approximately 20°C) at a rate of less than 3°C per minute in order to promote the crystal growth of component (B), and it is even more preferable to lower the temperature as slowly as possible. If the melting point of component (B) is between 70°C and 95°C as described above, it may be cooled by air, or it may be cooled in a water bath at about 0-50°C.

[0042] Furthermore, if components (C) to (E) and other optional components are used, these components can be incorporated when producing the mixture of component (A), component (B), and water in <Step 1>.

[0043] The storage stability of the thickening agent composition of the present invention can be evaluated, for example, by comparing the appearance of the composition described in the examples with that of a thickening agent composition that does not contain component (B), based on the turbidity and uniformity of the appearance. Furthermore, the defoaming properties of the thickening agent composition of the present invention can be evaluated, for example, by comparing the amount of air in a hydraulic composition containing the thickening agent composition described in the examples with that of a hydraulic composition containing the thickening agent composition without component (B).

[0044] The thickening agent composition of the present invention is used for hydraulic compositions containing hydraulic powder and water. The hydraulic composition contains the thickening agent composition in an amount of 0.1 parts by mass or more, more preferably 0.3 parts by mass or more, and even more preferably 0.5 parts by mass or more, per 100 parts by mass of water in the hydraulic composition, from the viewpoint of good non-separation in water and defoaming properties, and from the same viewpoint, preferably 4.0 parts by mass or less, more preferably 3.0 parts by mass or less, and even more preferably 2.0 parts by mass or less.

[0045] The hydraulic powder used in the hydraulic composition is a powder that hardens when mixed with water, and examples include ordinary Portland cement, rapid-hardening Portland cement, ultra-rapid-hardening Portland cement, sulfate-resistant Portland cement, low-heat Portland cement, white Portland cement, and eco-cement (e.g., JIS R5214). Among these, from the viewpoint of shortening the time it takes for the hydraulic composition to reach the required strength, cement selected from rapid-hardening Portland cement, ordinary Portland cement, sulfate-resistant Portland cement, and white Portland cement is preferred, and cement selected from rapid-hardening Portland cement and ordinary Portland cement is more preferred.

[0046] The hydraulic powder may contain blast furnace slag, fly ash, silica fume, anhydrous gypsum, etc., and may also contain non-hydraulic limestone fine powder, etc. As the hydraulic powder, blast furnace cement, fly ash cement, or silica fume cement, which are mixtures of cement with blast furnace slag, fly ash, silica fume, etc., may be used. Furthermore, hydraulic powders include cement or a mixture of cement and bentonite powder.

[0047] The following formula in the hydraulic composition W / C=[Water content (mass) / Hydraulic powder content (mass)]×100 (mass%) The ratio of water content to hydraulic powder content, as represented by [formula], is preferably 45% by mass or more, more preferably 50% by mass or more, and even more preferably 60% by mass or more, from the viewpoint of economy and fluidity, and also preferably 150% by mass or less, more preferably 120% by mass or less, and even more preferably 100% by mass or less. Furthermore, if the hydraulic powder includes powders selected from those having properties that harden through hydration reactions such as cement, powders having pozzolanic properties, powders having latent hydraulic properties, and stone powder (calcium carbonate powder), then in this invention, the amounts of these powders are also included in the amount of hydraulic powder. In addition, if the powder having properties that harden through hydration reactions contains a high-strength admixture, then the amount of the high-strength admixture is also included in the amount of hydraulic powder. This also applies to other parts of mass related to the mass of the hydraulic powder.

[0048] Furthermore, the hydraulic composition may contain aggregate. Examples of aggregate include fine aggregate and coarse aggregate. Examples of fine aggregate include those specified in number 2311 of JIS A0203-2014. Examples of fine aggregate include river sand, land sand, mountain sand, sea sand, lime sand, silica sand, and crushed sand thereof, blast furnace slag fine aggregate, ferronickel slag fine aggregate, lightweight fine aggregate (artificial and natural), and recycled fine aggregate. Examples of coarse aggregate include those specified in number 2312 of JIS A0203-2014. For example, examples of coarse aggregate include river gravel, land gravel, mountain gravel, sea gravel, lime gravel, crushed stone thereof, blast furnace slag coarse aggregate, ferronickel slag coarse aggregate, lightweight coarse aggregate (artificial and natural), and recycled coarse aggregate. Fine aggregate and coarse aggregate may be mixed together or used as a single type. Note that the terminology for aggregates is based on "Comprehensive Guide to Concrete" (published June 10, 1998, by Gijutsu Shoin).

[0049] When the hydraulic composition is concrete, the amount of coarse aggregate used is preferably 50% or more, more preferably 55% or more, even more preferably 60% or more, from the viewpoint of developing the strength of the hydraulic composition, reducing the amount of hydraulic powder such as cement used, and improving the ability to fill into formwork, etc., and from the same viewpoint, preferably 100% or less, more preferably 90% or less, and even more preferably 80% or less. The bulk volume is 1 m³ of concrete. 3 This is the ratio of the volume of coarse aggregate (including voids) inside. Furthermore, when the hydraulic composition is concrete, the amount of fine aggregate used is preferably 500 kg / m³ from the viewpoint of improving the ability to fill into formwork, etc. 3 Above, a comfortable 600 kg / m 3 More preferably 700 kg / m 3 That is all, and from the same viewpoint, preferably 1,000 kg / m 3 More preferably 900 kg / m 3 The following applies: When the hydraulic composition is mortar, the amount of fine aggregate used is preferably 800 kg / m³. 3 In summary, a comfortable 900 kg / m 3Preferable is 1,000 kg / m or more, 3 and, from the same point of view, preferably 2,000 kg / m or less, 3 more preferably 1,800 kg / m or less, 3 still more preferably 1,700 kg / m or less. 3

[0050] The thickener composition of the present invention can be used for a hydraulic composition containing hydraulic powder and water. The hydraulic composition has high viscosity after production, and thus is excellent in material separation resistance, suppression of water separation in water, prevention of water leakage into the ground, etc. Therefore, for example, it can be used for sprayed concrete, tunnel repair, construction on non-horizontal walls, additives for shaft excavation, root fixing liquid, pile circumference fixing liquid, water-non-separating concrete, prepacked concrete, plastic grout, etc.

[0051] For the hydraulic composition of the present invention, all of the components (A) to (E) of the thickener composition, optional components, water which is the remainder other than these components, and the hydraulic composition, their contents, etc. can be applied as they are.

[0052] The hydraulic composition of the present invention has defoaming properties. That is, by mixing the thickener composition with the hydraulic composition, foaming of the hydraulic composition can be suppressed. The defoaming property of the hydraulic composition containing the thickener composition can be evaluated, for example, by comparing the air amount of the hydraulic composition containing the thickener composition described in the examples with the hydraulic composition containing a thickener composition not containing the component (B).

[0053] The present invention provides a method for suppressing foaming of a hydraulic composition by mixing a thickener composition containing (A) component: an amine oxide type surfactant, and (B) component: a fatty acid glyceride into a hydraulic composition containing hydraulic powder and water.

[0054] <(A) component: an amine oxide type surfactant> The thickener composition used in the method of the present invention contains one or more amine oxide surfactants as component (A). From the viewpoint of high thickening performance, as the amine oxide surfactant, the following general formula (1)

Chemical formula

[0055] In the present invention, component (A) is one or more of the compounds represented by the above general formula (1) [hereinafter also referred to as compound (1)]. In the case of two or more compounds, X in the general formula (1) is different. Among the two or more compounds, at least one is a compound in which R 1a or R 1b in the general formula (1) is an alkenyl group. Hereinafter, this aspect will be described.

[0056] Regarding compound (1), when X in the general formula (1) is different, taking the case where there are two compounds (1) as an example, for example, the following aspects can be mentioned. In the following aspects, among the two compounds (1), R 1a or R 1b of at least one compound (1) is an alkenyl group. (i) One of R 1a or R 1b is an alkyl group, and the other R 1a or R 1b is an alkenyl group. (ii) The carbon number of one of R 1a or R 1b is different from the carbon number of the other R 1a or R 1b . (iii) One of X is R 1a , and the other X is R 1b -[CONH-CH2CH2CH2] n -. (iv) X are both R 1b-[CONH-CH2CH2CH2] n - and one n is different from the other n. (v) A combination of (i) to (iv) above.

[0057] In general formula (1), X is R 1a or R 1b -[CONH-CH2CH2CH2] n It is a base represented by -. R 1a R is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. 1a When is an alkenyl group, the number of carbon atoms is preferably 18 or more, and preferably 22 or less, R 1a When it is an alkyl group, the number of carbon atoms is preferably 16 or more, and preferably 22 or less. R 1b R is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. 1b When it is an alkenyl group, the number of carbon atoms is preferably 17 or more, and preferably 21 or less, R 1b When it is an alkyl group, the number of carbon atoms is preferably 15 or more, and preferably 21 or less. n is an integer between 1 and 3, preferably 1. R 2 and R 3 Each is independently preferably an alkyl group having 1 to 2 carbon atoms or (C2H4O) p The group is represented by H. p is preferably a number between 0 and 5, and more preferably 1 or 2.

[0058] In this invention, two or more compounds (1) with different X in general formula (1) are used, preferably five or fewer, and more preferably two. At least one of the two or more compounds (1) used in this invention has R in general formula (1) 1a or R 1b A compound having an alkenyl group with 14 to 22 carbon atoms, that is, R in X in general formula (1) 1a as an alkenyl group having 14 to 22 carbon atoms or R1b It is a compound containing an alkenyl group with 13 to 21 carbon atoms.

[0059] In this invention, there are two types of compound (1), and of the two types of compound (1), including (i) to (v) above, one of them is such that X in general formula (1) is R 1a Preferably, the compound is an alkenyl group having 14 to 22 carbon atoms. That is, component (A) is two types of compounds represented by the general formula (1), the two types of compounds differ in X in the general formula (1), and of the two types of compounds, one of which has X in the general formula (1) as R 1a And R 1a It is preferable that the compound is an alkenyl group.

[0060] (A) As a component, X in general formula (1) is R 1a or R 1b -[CONH-CH2CH2CH2] n Examples include a compound (1a) which has a group represented by - and a compound (1b) which is different from compound (1a) in that X in general formula (1). (A) Specifically, the components include a combination of compound (1a) represented by the following general formula (1a) and compound (1b) represented by the following general formula (1b). [ka] TIFF2026089031000008.tif38170 [In the formula, n1, n2, R 11a , R 11b , R 2 and R 3 This indicates the same content as above.

[0061] In general formula (1a), R 11a The number of carbon atoms is preferably 17 or more, and preferably 22 or less. In general formula (1a), n1 is preferably 0 or 1, more preferably 0.

[0062] In general formula (1b), when n² is 0, R 11b If R is an alkyl group, 11b The number of carbon atoms is preferably 16 or more, and preferably 22 or less. In general formula (1b), when n² is 0, R 11b If R is an alkenyl group, 11b The number of carbon atoms is preferably 18 or more, and preferably 22 or less. In general formula (1b), n² is 1 to 3 and R 11b If R is an alkyl group, 11b The number of carbon atoms is preferably 15 or more, and preferably 21 or less. In general formula (1b), n² is 1 to 3 and R 11b If R is an alkenyl group, 11b The number of carbon atoms is preferably 17 or more, and preferably 21 or less. In general formula (1b), R 11b Alkyl alkyl groups are preferred. In general formula (1b), n2 is preferably 0 or 1.

[0063] In general formula (1a) or (1b), R 2 and R 3 Each is independently preferably a C1 or C2 alkyl group or -(C2H4O) p The group is represented by H, and more preferably by an alkyl group having 1 or 2 carbon atoms. In general formula (1a) or (1b), p is preferably an integer between 0 and 3. If n1 and n2 are the same number, R 11b The alkenyl group is R 11a It is a different alkenyl group.

[0064] The (A) component of the present invention includes a combination of compound (11a) represented by the following general formula (11a) and compound (1b) represented by the following general formula (1b).

[0065] [ka] TIFF2026089031000010.tif38170 [In the formula, n2, R 11a , R 11b , R 2 and R 3 This indicates the same content as above.

[0066] Compound (11a) represented by general formula (11a) corresponds to the compound in general formula (1a) where n1 is 0. 11a , R 2 and R 3 The preferred embodiment is the same as that of general formula (1a), and as compound (11a), oleyldimethylamine oxide is most preferred from the viewpoint of high viscosity-enhancing performance over a wide temperature range.

[0067] Furthermore, the preferred embodiment of compound (1b) is the same as described above, and from the viewpoint of high viscosity-enhancing performance over a wide temperature range, oleamidopropyldimethylamine oxide is the most preferred compound (1b).

[0068] The content of amine oxide (1) in 100 parts by mass of the thickening agent composition of the present invention is preferably 15 parts by mass or more, more preferably 20 parts by mass or more, and even more preferably 25 parts by mass or more, from the viewpoint of high thickening performance, and from the viewpoint of maintaining a liquid state and being easy to handle, it is preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and even more preferably 35 parts by mass or less.

[0069] When two types of amine oxides, compounds (1a) and (1b), are used in combination as amine oxide (1), the content of compound (1a) in 100 parts by mass of the thickening agent composition is preferably 1 part by mass or more, more preferably 3 parts by mass or more, and even more preferably 5 parts by mass or more, from the viewpoint of high thickening performance over a wide temperature range, and from the same viewpoint, preferably 20 parts by mass or less, more preferably 15 parts by mass or less, and even more preferably 10 parts by mass or less. Furthermore, the content of compound (1b) in 100 parts by mass of the thickening agent composition is preferably 10 parts by mass or more, more preferably 15 parts by mass or more, and even more preferably 20 parts by mass or more, from the viewpoint of high thickening performance over a wide temperature range, and from the same viewpoint, preferably 40 parts by mass or less, more preferably 30 parts by mass or less, and even more preferably 25 parts by mass or less.

[0070] Also, the following formula [Amine oxide (1a) content] / [Amine oxide (1b) content] The mass ratio of the content of amine oxide (1a) to the content of amine oxide (1b), as shown by , is preferably 0.05 or more, more preferably 0.1 or more, and even more preferably 0.2 or more, from the viewpoint of high viscosity-enhancing performance over a wide temperature range, and from the same viewpoint, preferably 2 or less, more preferably 1 or less, and even more preferably 0.5 or less.

[0071] When using either the amine oxide (1) of general formula (1a) or (1b), either compound (1a) or compound (1b) may be used, but from the viewpoint of high viscosity, compound (1b) is preferred. When using two or more compounds (1b) from the amine oxide of general formula (1b), R in general formula (1b) 11b , R 2 , R 3 n2 and p may be different. As the amine oxide of general formula (1b), it is most preferable to use oleamidopropyldimethylamine oxide alone.

[0072] When compound (1b) is used as amine oxide (1), the content of one or more amine oxides of general formula (1b) in 100 parts by mass of the thickening agent composition is preferably 15 parts by mass or more, more preferably 20 parts by mass or more, and even more preferably 25 parts by mass or more, and from the same viewpoint, preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and even more preferably 35 parts by mass or less.

[0073] <(B) component> Component (B) of the thickening agent composition used in the method of the present invention is a fatty acid glyceride. From the viewpoint of improving storage stability by crystal formation, crystalline fatty acid glycerides are preferred, fatty acid glycerides having hydroxyl groups in crystalline aliphatic acyl groups are more preferred, and fatty acid glycerides having aliphatic acyl groups with 14 to 18 carbon atoms in which one or more hydrogen atoms are substituted with hydroxyl groups are even more preferred. The presence of hydroxyl groups in aliphatic acyl groups promotes crystal formation through intermolecular hydrogen bonding between components (B). Furthermore, fatty acid glycerides having hydroxyl groups in aliphatic acyl groups can have up to three aliphatic acyl groups having hydroxyl groups in aliphatic acyl groups. From the viewpoint of promoting crystal formation, the average number of acyl groups in fatty acid glycerides having hydroxyl groups in aliphatic acyl groups is preferably 1 or more, more preferably 2 or more, and even more preferably 2.5 or more. From the viewpoint of the storage stability of the crystals, it is most preferably 3. Furthermore, the iodine value of fatty acid glycerides is preferably 5 g-I2 / 100 g or less, more preferably 4 g-I2 / 100 g or less, more preferably 3 g-I2 / 100 g or less, and more preferably 2 g-I2 / 100 g or less, as this generates crystals of a more uniform size and shape, thereby increasing the viscosity of the thickening agent composition for hydraulic compositions at low shear. The iodine value can be determined according to the method described in JIS K 0070:1992 (Test methods for acid value, saponification value, ester value, iodine value, hydroxyl value, and unsaponifiable matter of chemical products). Crystallinity refers to the property of being solid at room temperature and exhibiting a reversible detection of an endothermic peak (melting point) during temperature increase in differential scanning calorimetry. Crystallinity includes all types of crystals, such as single crystals, perfect crystals, mosaic crystals, polycrystalline materials, and microcrystalline materials. For example, the temperature (melting point) of the peak of the endothermic peak detected at the highest temperature during heating in differential scanning calorimetry of component (B) can be determined using a differential scanning calorimetry (DSC) in the following way. • Sample preparation Measurement sample: (B) 10 mg of component placed in an aluminum pan with a lid and sealed with the lid. Reference: Aluminum pan with the lid on, without any contents inside. ·Measurement method The sample and reference are placed in a TA Instruments DSC (Q2000). The temperature is increased from 30°C to 95°C at a rate of 5°C / min, held at 95°C for 5 minutes, then cooled to 25°C at a rate of 20°C / min, and then increased again to 95°C at a rate of 2°C / min. The temperature of the peak of the highest temperature endothermic peak detected during the second heating cycle is taken as the melting point of component (B). (B) Only one component may be used, and two or more may be used in combination. From the viewpoint of improving storage stability by crystal formation, it is preferable to use hydrogenated castor oil and / or hydrogenated castor oil, which are fatty acid glycerides having a hydroxyl group in a crystalline C18 aliphatic acyl group.

[0074] The melting point of component (B) is preferably 70°C or higher, more preferably 80°C or higher, and from the viewpoint of achieving both good storage stability and crystallinity, preferably 95°C or lower, more preferably 90°C or lower.

[0075] (B) The content of component (B) is preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, and even more preferably 0.15 parts by mass or more, per 100 parts by mass of the thickening agent composition, from the viewpoint of good storage stability, and preferably 10 parts by mass or less, more preferably 5 parts by mass or less, and even more preferably 1 part by mass or less, from the viewpoint of economy and fluidity.

[0076] The content of component (B) in the thickening agent composition of the present invention relative to 100 parts by mass of component (A) is preferably 1.0 part by mass or more, more preferably 1.25 parts by mass or more, from the viewpoint of good dispersibility and crystallinity of component (B) in aqueous solution, and preferably 5.0 parts by mass or less, more preferably 3.0 parts by mass or less, from the same viewpoint.

[0077] The thickening agent composition used in the method of the present invention may contain an antifoaming agent other than component (B) as component (D). That is, from the viewpoint of improving workability by monoliquefaction, it is preferable that the thickening agent composition of the present invention further contains an antifoaming agent (excluding component (B)). (D) As for the defoaming agent that can be used as component, from the viewpoint of defoaming properties, one or more selected from silicone-based defoaming agents, fatty acid ester-based defoaming agents, ether-based defoaming agents, and aliphatic amine-based defoaming agents are preferred, with silicone-based defoaming agents being more preferred. Dimethylpolysiloxane is more preferred among silicone-based defoaming agents, polyalkylene glycol fatty acid ester is more preferred among fatty acid ester-based defoaming agents, polyalkylene glycol alkyl ether is more preferred among ether-based defoaming agents, and alkyldimethylamine or a salt thereof is more preferred among aliphatic amine-based defoaming agents.

[0078] When the thickening agent composition of the present invention contains component (D), from the viewpoint of achieving both good defoaming properties and low foaming properties in a hydraulic composition, the amount of component (D) is preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, and even more preferably 1.0 part by mass or more, per 100 parts by mass of the thickening agent composition, and from the same viewpoint, it is preferably 10 parts by mass or less, more preferably 7.5 parts by mass or less, and even more preferably 5 parts by mass or less.

[0079] When the thickening agent composition of the present invention contains component (D), the content of component (D) relative to 100 parts by mass of component (A) in the thickening agent composition is preferably 2.5 parts by mass or more, more preferably 5.0 parts by mass or more, from the viewpoint of achieving both good defoaming properties and low foaming properties in a hydraulic composition, as well as thickening properties, and from the same viewpoint, preferably 25 parts by mass or less, more preferably 20 parts by mass or less.

[0080] The hydraulic composition contains the thickening agent composition in an amount of 0.1 parts by mass or more, more preferably 0.3 parts by mass or more, and even more preferably 0.5 parts by mass or more, per 100 parts by mass of water in the hydraulic composition, from the viewpoint of good non-separation in water and defoaming properties, and from the same viewpoint, preferably 4.0 parts by mass or less, more preferably 3.0 parts by mass or less, and even more preferably 2.0 parts by mass or less.

[0081] The hydraulic powder used in the hydraulic composition is a powder that hardens when mixed with water, and examples include ordinary Portland cement, rapid-hardening Portland cement, ultra-rapid-hardening Portland cement, sulfate-resistant Portland cement, low-heat Portland cement, white Portland cement, and eco-cement (e.g., JIS R5214). Among these, from the viewpoint of shortening the time it takes for the hydraulic composition to reach the required strength, cement selected from rapid-hardening Portland cement, ordinary Portland cement, sulfate-resistant Portland cement, and white Portland cement is preferred, and cement selected from rapid-hardening Portland cement and ordinary Portland cement is more preferred.

[0082] The hydraulic powder may contain blast furnace slag, fly ash, silica fume, anhydrous gypsum, etc., and may also contain non-hydraulic limestone fine powder, etc. As the hydraulic powder, blast furnace cement, fly ash cement, or silica fume cement, which are mixtures of cement with blast furnace slag, fly ash, silica fume, etc., may be used. Furthermore, hydraulic powders include cement or a mixture of cement and bentonite powder.

[0083] The following formula in the hydraulic composition W / C=[Water content (mass) / Hydraulic powder content (mass)]×100 (mass%) The ratio of water content to hydraulic powder content, as represented by [formula], is preferably 45% by mass or more, more preferably 50% by mass or more, and even more preferably 60% by mass or more, from the viewpoint of economy and fluidity, and also preferably 150% by mass or less, more preferably 120% by mass or less, and even more preferably 100% by mass or less. Furthermore, if the hydraulic powder includes powders selected from those having properties that harden through hydration reactions such as cement, powders having pozzolanic properties, powders having latent hydraulic properties, and stone powder (calcium carbonate powder), then in this invention, the amounts of these powders are also included in the amount of hydraulic powder. In addition, if the powder having properties that harden through hydration reactions contains a high-strength admixture, then the amount of the high-strength admixture is also included in the amount of hydraulic powder. This also applies to other parts of mass related to the mass of the hydraulic powder.

[0084] Furthermore, the hydraulic composition may contain aggregate. Examples of aggregate include fine aggregate and coarse aggregate. Examples of fine aggregate include those specified in number 2311 of JIS A0203-2014. Examples of fine aggregate include river sand, land sand, mountain sand, sea sand, lime sand, silica sand, and crushed sand thereof, blast furnace slag fine aggregate, ferronickel slag fine aggregate, lightweight fine aggregate (artificial and natural), and recycled fine aggregate. Examples of coarse aggregate include those specified in number 2312 of JIS A0203-2014. For example, examples of coarse aggregate include river gravel, land gravel, mountain gravel, sea gravel, lime gravel, crushed stone thereof, blast furnace slag coarse aggregate, ferronickel slag coarse aggregate, lightweight coarse aggregate (artificial and natural), and recycled coarse aggregate. Fine aggregate and coarse aggregate may be mixed together or used as a single type. Note that the terminology for aggregates is based on "Comprehensive Guide to Concrete" (published June 10, 1998, by Gijutsu Shoin).

[0085] When the hydraulic composition is concrete, the amount of coarse aggregate used is preferably 50% or more, more preferably 55% or more, even more preferably 60% or more, from the viewpoint of developing the strength of the hydraulic composition, reducing the amount of hydraulic powder such as cement used, and improving the ability to fill into formwork, etc., and from the same viewpoint, preferably 100% or less, more preferably 90% or less, and even more preferably 80% or less. The bulk volume is 1 m³ of concrete. 3 This is the ratio of the volume of coarse aggregate (including voids) inside. Furthermore, when the hydraulic composition is concrete, the amount of fine aggregate used is preferably 500 kg / m³ from the viewpoint of improving the ability to fill into formwork, etc. 3 Above, a comfortable 600 kg / m 3 More preferably 700 kg / m 3 That is all, and from the same viewpoint, preferably 1,000 kg / m 3 More preferably 900 kg / m 3 The following applies: When the hydraulic composition is mortar, the amount of fine aggregate used is preferably 800 kg / m³. 3 In summary, a comfortable 900 kg / m 3 More preferably, 1,000 kg / m 3 That is all, and from the same viewpoint, preferably 2,000 kg / m 3 More preferably, 1,800 kg / m 3 More preferably, 1,700 kg / m 3 The following applies:

[0086] The thickening agent composition of the present invention can be used in a method for suppressing foaming of a hydraulic composition by mixing it with the hydraulic composition. The preferred embodiments and contents of each component of the thickening agent composition used in this method, as well as the amount to be added to the hydraulic composition, can be applied as described above. Furthermore, the degree of foam suppression can be evaluated by measuring the amount of air in the hydraulic composition, similar to the evaluation of defoaming properties described above, and for example, the unit volume mass (gravimetric method) described in JHS A313 can be used. [Examples]

[0087] Six different thickening agent compositions, formulations 1 through 6, were manufactured. The components used in their manufacture are as follows: <A mixture of component (A), component (C), and water> Amine oxide type surfactant 1 (a mixture of 6% by mass of oleyldimethylamine oxide, 24% by mass of oleamidopropyldimethylamine oxide, 30% by mass of propylene glycol, and 40% by mass of water) Amine oxide type surfactant 2 (a mixture of 30% by mass of oleamidopropyl dimethylamine oxide, 30% by mass of propylene glycol, and 40% by mass of water) <(B) component> Kao Wax 85P (hardened castor oil, powder form, melting point 86°C, manufactured by Kao Corporation) <(D) component> Antifoam E-20 (modified silicone emulsion defoamer, manufactured by Kao Corporation) Asahi Silicone AF-146 (Emulsion-type silicone defoamer, manufactured by Asahi Dye Manufacturing Co., Ltd.)

[0088] <Formulation 1> 992g of amine oxide-type surfactant 1 and 8g of Kaowax 85P were weighed into a three-necked flask and heated in an oil bath to 90°C while stirring at 200 rpm. Then, while stirring, the mixture was allowed to cool to below 40°C at room temperature of 20°C, and formulation 1 was obtained by crystallizing crystalline hydrogenated castor oil in the solution.

[0089] <Formulation 2> 942g of amine oxide-type surfactant 1 and 8g of Kaowax 85P were weighed into a three-necked flask and heated in an oil bath to 90°C while stirring at 200 rpm. Then, while stirring, the mixture was allowed to cool to below 40°C at room temperature of 20°C, allowing crystalline hydrogenated castor oil to crystallize in the solution. After confirming that the temperature had fallen below 40°C, 50g of Antifoam E-20 was added, and the mixture was stirred for another 30 minutes at 200 rpm to obtain formulation 2.

[0090] <Formulation 3> 976g of amine oxide-type surfactant 2 and 4g of Kaowax 85P were weighed into a three-necked flask and heated in an oil bath to 90°C while stirring at 200 rpm. Then, while stirring, the mixture was allowed to cool to below 40°C at room temperature of 20°C, allowing crystalline hydrogenated castor oil to crystallize in the solution. After confirming that the temperature had fallen below 40°C, 20g of Asahi Silicone AF-146 was added, and the mixture was stirred for another 30 minutes at 200 rpm to obtain formulation 3.

[0091] <Formulation 4> Formulation 4 was obtained by weighing 950g of amine oxide type surfactant 1 and 50g of antiform E-20 into a three-necked flask and stirring at 200 rpm for 30 minutes.

[0092] <Formulation 5> Formula 5 was obtained by weighing 980g of amine oxide type surfactant 2 and 20g of Asahi Silicone AF-146 into a three-necked flask and stirring at 200rpm for 30 minutes.

[0093] <Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-2> Using the method described above, formulations 1 to 5 were prepared and stored in a 40°C constant temperature bath for one month. Their appearance was then examined. If the appearance remained uniformly cloudy, it was classified as "homogeneous." If aggregates or separated matter were present at the top or bottom, or if syneresis occurred, it was classified as "phase-separated." The results are shown in Table 1.

[0094] [Table 1]

[0095] Formulas 1-3, which used hydrogenated castor oil as an antifoaming agent, maintained a uniform state even after 1 month at 40°C. On the other hand, formulas 4 and 5, which used a general-purpose antifoaming agent instead of hydrogenated castor oil, separated into two phases.

[0096] <Examples 2-1 to 2-2 and Comparative Examples 2-1 to 2-2> Next, ordinary cement (a mixture of ordinary Portland cement from Taiheiyo Cement Corporation and Sumitomo Osaka Cement Corporation in a mass ratio of 1:1) was added as a hydraulic powder to the above formulations 1, 2, 4 or amine oxide type surfactant 1, and the storage stability, air content, and the balance between storage stability and defoaming properties were evaluated.

[0097] Example 2-1 800g of ordinary Portland cement was measured into a 1000mL plastic cup. 640g of water was added and mixed with a cooking hand mixer for 30 seconds. Next, 6.4g of formulation 1 was added and mixed for 1 minute to obtain cement milk containing 1 part by mass of formulation 1 per 100 parts by mass of water. The viscosity and air content of the obtained cement milk were measured by the following method.

[0098] <Air volume measurement> The amount of air was measured according to the unit volume mass (gravimetric method) described in JHS A313. Specifically, a 400 mL metal container, whose weight had been measured in advance, was filled to the brim with cement milk and the total weight was measured. Meanwhile, the theoretical specific gravity of the hydraulic composition with 0% air content was calculated from the specific gravity and amount of raw materials used in the manufacture of the cement milk. The amount of air (volume %) was calculated using the formula 100 - {(total weight - weight of container) / (400 × theoretical specific gravity with 0% air content)}.

[0099] Example 2-2 The same procedure as in Example 2-1 was followed, except that formulation 2 was used instead of formulation 1.

[0100] Comparative Example 2-1 The same procedure as in Example 2-1 was followed, except that amine oxide-type surfactant 1 was used instead of formulation 1.

[0101] Comparative Example 2-2 The same procedure as in Example 2-1 was followed, except that Formula 4 was used instead of Formula 1. Formula 4 was shaken well to ensure uniformity before being added to the cement grout.

[0102] The storage stability is a reproduction of the storage stability of the thickening agent composition incorporated into the hydraulic composition. Compared to Comparative Example 2-1 using amine oxide type surfactant 1, which had an air content of 20.5% by volume, if the air content could be reduced to half or less, it was judged to have excellent defoaming properties. If both storage stability and defoaming properties were achieved, it was judged as "excellent," and otherwise as "bad." The results are shown in Table 2. Note that Comparative Example 2-1, amine oxide-type surfactant 1 which does not contain a conventional defoaming agent, is judged to be "homogeneous" in appearance. However, since it does not contain a defoaming agent, it is not subject to evaluation of storage stability, and therefore the storage stability of Comparative Example 2-1 is listed as "-".

[0103] [Table 2]

[0104] As is clear from Table 2, Examples 2-1 and 2-2, which used hydrogenated castor oil as an antifoaming agent, were hydraulic compositions that achieved both storage stability and antifoaming properties. Comparative Example 2-2, which used the silicone antifoaming agent Antifoam E-20, showed a reduction in air content, but its storage stability was poor, and it did not achieve both storage stability and antifoaming properties.

Claims

1. (A) Components: Amine oxide type surfactant, and (B) Ingredients: Fatty acid glycerides, A thickening agent composition containing the following:

2. The thickening agent composition according to claim 1, wherein the fatty acid glyceride is a crystalline fatty acid glyceride.

3. The thickening agent composition according to claim 2, wherein the crystalline fatty acid glyceride is hydrogenated castor oil.

4. The thickening agent composition according to claim 1, wherein the content of component (B) per 100 parts by mass of component (A) is 1.0 part by mass or more and 5.0 parts by mass or less.

5. The thickening agent composition according to claim 1, further containing water, wherein the water content in 100 parts by mass of the thickening agent composition is 10 parts by mass or more and 50 parts by mass or less.

6. The thickening agent composition according to claim 1, wherein the melting point of component (B) is 70°C or higher and 95°C or lower.

7. The thickening agent composition according to claim 1, further comprising an antifoaming agent (excluding component (B)) as component (D).

8. (A) Ingredients: Amine oxide type surfactant, (B) Components: fatty acid glycerides, A method for producing a thickening agent composition according to any one of claims 1 to 7, comprising the steps of: mixing a mixture of water at a temperature above the melting point of component (B) to obtain a solution; and crystallizing component (B) in the obtained solution.

9. A thickening agent composition according to any one of claims 1 to 7, for use in a hydraulic composition containing hydraulic powder and water.

10. A hydraulic composition comprising a hydraulic powder, water, and the thickening agent composition described in claims 1 to 7.

11. The hydraulic composition according to claim 10, further comprising an antifoaming agent (excluding component (B)) as component (D).

12. A hydraulic composition containing hydraulic powder and water, (A) Components: Amine oxide type surfactant, and (B) Ingredients: Fatty acid glycerides, A method for suppressing foaming of a hydraulic composition by mixing it with a thickening agent composition containing [a specific substance].

13. The method according to claim 12, wherein the fatty acid glyceride is a crystalline fatty acid glyceride.

14. The method according to claim 13, wherein the crystalline fatty acid glyceride is hydrogenated castor oil.

15. The method according to claim 12, wherein the thickening agent composition further contains an antifoaming agent (excluding component (B)) as component (D).

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