Thickener composition

Abstract

Using an amine oxide-type surfactant as a thickener causes a problem of a decrease in the strength of a slurry of a hydraulic composition due to mixing of bubbles. Accordingly, there is the problem that although a silicone-based antifoaming agent is added as described above, a hydrophilic thickener and a hydrophobic antifoaming agent are gradually separated after production, and performance as each of the thickener and the antifoaming agent degrades over time. Therefore, a thickener composition having excellent storage stability that maintains uniformity for a long period of time without separating the thickener and the antifoaming agent is desired.　To solve the problem, provided is a thickener composition comprising: an (A) component which is an amine oxide-type surfactant; and a (B) component which is a fatty acid glyceride.

Description

Thickening agent composition

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

[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, Japanese Patent Publication No. 2023-61318 discloses a thickening agent containing an amine oxide-type surfactant and a silicone-based defoaming agent. Furthermore, Japanese Patent Publication No. 2024-37207 discloses a thickening agent composition for hydraulic compositions containing (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. Summary of the Invention

[0004] 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.

[0005] 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. That is, the present invention relates to a thickening agent composition containing (A) component: amine oxide-type surfactant and (B) component: fatty acid glyceride. The present invention also relates to a method for producing a thickening agent composition, comprising the steps of mixing a mixture of (A) component: amine oxide-type surfactant, (B) component: fatty acid glyceride, and water at a temperature above the melting point of (B) to obtain a solution, and crystallizing (B) component in the obtained solution. The present invention also relates to a hydraulic composition containing hydraulic powder, water, and a thickening agent composition. Furthermore, the present invention relates to a method for suppressing foaming of a hydraulic composition containing hydraulic powder and water by mixing a thickening agent composition containing (A) an amine oxide-type surfactant and (B) a fatty acid glyceride with the hydraulic composition containing hydraulic powder and water.

[0006] 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

[0007] <Component (A): 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. [In the formula, X is R １ａ or R １ｂ - [CONH-CH ２ CH ２ CH ２ ] ｎ This indicates a group represented by -. R １ａ This represents an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. １ｂrepresents 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 to 3. R ２ and R ３ each independently represents an alkyl group having 1 to 4 carbon atoms or a group represented by -(C ２ H ４ O) ｐ H. p represents the average number of moles of ethyleneoxy groups added, and the total number of groups represented by -(C ２ and R ３ contained in R ２ H ４ O) ｐ H is an integer of 0 to 5. An amine oxide represented by ] is preferred.

[0008] 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 a compound in which R １ａ or R １ｂ in the general formula (1) is an alkenyl group. Hereinafter, this aspect will be described.

[0009] Regarding compound (1), when X in the general formula (1) is different, considering 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 two compounds (1) is an alkenyl group. (i) One of R １ａ or R １ｂ is an alkyl group, and the other of R １ａ or R １ｂ is an alkenyl group. (ii) The number of carbon atoms of one of R １ａ or R １ｂ is different from the number of carbon atoms of the other of R １ａ or R １ｂ . (iii) One of X is R １ａ , and the other of X is R １ｂ -[CONH-CH ２ CH ２ CH ２ ​ｎ - (iv) X is both R １ｂ - [CONH-CH ２ CH ２ CH ２ ] ｎ - and one n is different from the other n. (v) A combination of (i) to (iv) above.

[0010] In general formula (1), X is R １ａ or R １ｂ - [CONH-CH ２ CH ２ CH ２ ] ｎ It is a group 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. １ｂ R is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. １ｂ When is an alkenyl group, the number of carbon atoms is preferably 17 or more, and preferably 21 or less, R １ｂ When 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, and preferably 1. ２ and R ３ Each is independently preferably an alkyl group having 1 to 2 carbon atoms or (C ２ H ４ O) ｐ The base is represented by H. p is an integer between 0 and 5, preferably 1 or 2.

[0011] 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 １ｂA 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.

[0012] 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 R in the general formula (1). １ａ And R １ａ It is preferable that the compound is an alkenyl group.

[0013] (A) As a component, X in general formula (1) is R １ａ or R １ｂ - [CONH-CH ２ CH ２ CH ２ ] ｎ Examples include a combination of compound (1a) which is a group represented by - and compound (1b) which is different from compound (1a) in that X in general formula (1). Specifically, as component (A), examples include a combination of compound (1a) represented by the following general formula (1a) and compound (1b) represented by the following general formula (1b). [In the formula, n1 and n2 each independently represent integers between 0 and 3, inclusive. R] １１ａ 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 １１ａis an alkenyl group different from it. R ２ and R ３ represent the same content as described above.

[0014] In the general formula (1a), the number of carbon atoms of R １１ａ is preferably 17 or more, and preferably 22 or less. In the general formula (1a), n1 is preferably 0 or 1, more preferably 0.

[0015] In the general formula (1b), when n2 is 0 and R １１ｂ is an alkyl group, the number of carbon atoms of R １１ｂ is preferably 16 or more, and preferably 22 or less. In the general formula (1b), when n2 is 0 and R １１ｂ is an alkenyl group, the number of carbon atoms of R １１ｂ is preferably 18 or more, and preferably 22 or less. In the general formula (1b), when n2 is 1 to 3 and R １１ｂ is an alkyl group, the number of carbon atoms of R １１ｂ is preferably 15 or more, and preferably 21 or less. In the general formula (1b), when n2 is 1 to 3 and R １１ｂ is an alkenyl group, the number of carbon atoms of R １１ｂ is preferably 17 or more, and preferably 21 or less. In the general formula (1b), R １１ｂ is preferably an alkyl group. In the general formula (1b), n2 is preferably 0 or 1.

[0016] In the general formula (1a) or (1b), R ２ and R ３ are each independently preferably an alkyl group having 1 or 2 carbon atoms or a group represented by -(C ２ H ４ O) ｐ 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. When n1 and n2 are the same number, the alkenyl group of R １１ｂ is an alkenyl group different from R １１ａ

[0017] As the component (A) of the present invention, a combination of a compound (11a) represented by the following general formula (11a) and a compound (1b) represented by the following general formula (1b) can be mentioned.

[0018] [In the formula, n2, R １１ａ , R １１ｂ , R ２ and R ３ represent the same content as described above. ]

[0019] The compound (11a) represented by the general formula (11a) corresponds to the compound in which n1 is 0 in the general formula (1a). The preferred embodiments of R １１ａ , R ２ and R ３ in the general formula (11a) are the same as those in the general formula (1a). As the compound (11a), from the viewpoint of high thickening performance at a wide range of temperatures, oleyl dimethylamine oxide is most preferred.

[0020] Further, the preferred embodiments of the compound (1b) are the same as described above. As the compound (1b), from the viewpoint of high thickening performance at a wide range of temperatures, oleamide propyl dimethylamine oxide is most preferred.

[0021] The content of the amine oxide (1) in 100 parts by mass of the thickener composition of the present invention is preferably 15 parts by mass or more, more preferably 20 parts by mass or more, still more preferably 25 parts by mass or more from the viewpoint of high thickening performance, and from the viewpoint of physical properties for 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, still more preferably 35 parts by mass or less.

[0022] 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 also 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 also 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.

[0023] Furthermore, the mass ratio of the amine oxide (1a) content to the amine oxide (1b) content, expressed by the following formula [amine oxide (1a) content] / [amine oxide (1b) content], is preferably 0.05 or higher, more preferably 0.1 or higher, even more preferably 0.2 or higher, and from the same viewpoint, preferably 2 or lower, more preferably 1 or lower, and even more preferably 0.5 or lower.

[0024] 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.

[0025] 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.

[0026] <Component (B)> Component (B) 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 increases the viscosity of the thickening agent composition for hydraulic compositions at low shear conditions by generating crystals of more uniform size and shape, thus increasing the viscosity of the thickening agent composition for hydraulic compositions. ２ It is preferable that the amount be 100g or less, and 4g-I ２ / 100g or less is more preferable, 3g-I ２ / 100g or less is more preferable, 2g-I ２A value of 100g or less is more preferable. 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 means that the substance is solid at room temperature and has the property of reversibly detecting an endothermic peak (melting point) when the temperature is increased in differential scanning calorimetry. Crystallinity includes all single crystals, perfect crystals, mosaic crystals, polycrystalline, and microcrystalline substances. For example, the temperature (melting point) of the peak of the endothermic peak detected at the highest temperature when the temperature is increased in differential scanning calorimetry of component (B) can be determined using a differential scanning calorimetry (DSC) by the following method.・Sample preparation Measurement sample: 10 mg of component (B) placed in an aluminum pan with a lid and sealed with the lid. Reference: An aluminum pan with the lid on, without any contents inside. ・Measurement method Set the sample and reference in a TA Instruments DSC (Q2000). Increase the temperature from 30°C to 95°C at a rate of 5°C / min, hold at 95°C for 5 minutes, then decrease the temperature to 25°C at a rate of 20°C / min, and then increase the temperature 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 is taken as the melting point of component (B). At least one type of component (B) may be used, and two or more types can 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 carbon-18 aliphatic acyl group.

[0027] 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.

[0028] (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, in 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.

[0029] 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.

[0030] 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, one or more can be 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.

[0031] 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, in 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.

[0032] 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 by monoliquefaction, it is preferable that the thickening agent composition of the present invention further contains an antifoaming agent (except for component (B)). From the viewpoint of antifoaming properties, one or more antifoaming agents can be selected from silicone-based antifoaming agents, fatty acid ester-based antifoaming agents, ether-based antifoaming agents, and aliphatic amine-based antifoaming agents, and a silicone-based antifoaming agent is more preferable. Dimethylpolysiloxane is more preferable among silicone-based antifoaming agents, polyalkylene glycol fatty acid ester is more preferable among fatty acid ester-based antifoaming agents, polyalkylene glycol alkyl ether is more preferable among ether-based antifoaming agents, and alkyldimethylamine or its salt is more preferable among aliphatic amine-based antifoaming agents.

[0033] 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.

[0034] 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.

[0035] The thickening agent composition of the present invention may contain an anionic aromatic compound as component (E). As component (E), from the viewpoint of improving thickening properties, a sulfo group (-S(=O)(OH) ２ Aromatic compounds having an aromatic group (-C(=O)OH), aromatic compounds having a carboxyl group (-P(=O)(OH) ２Examples include aromatic compounds having a sulfo group, or one or more compounds selected from salts thereof. 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.

[0036] 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, in 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.

[0037] Furthermore, the thickening agent composition of the present invention may optionally contain components such as dispersants, air-enhancing agents, retarders, waterproofing agents, and fluidizing agents, to the extent that they do not affect the effects of the present invention.

[0038] From the viewpoint of economy and safety, the remainder of the thickening agent composition of the present invention, other than components (A) to (E) and optional components, is preferably water. 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.

[0039] The thickening agent composition of the present invention can be manufactured by the following steps: <Step 1> Mixing a mixture of component (A), component (B), and water at a temperature above the melting point of component (B) to obtain a solution; <Step 2> Crystallizing component (B) in the obtained solution.

[0040] 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, it may be cooled by so-called air cooling, or it may be cooled in a water bath at about 0 to 50°C.

[0041] 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>.

[0042] The storage stability of the thickening agent composition of the present invention can be evaluated, for example, by comparing the turbidity and uniformity of the appearance of the composition with that of a thickening agent composition that does not contain component (B), using the method described in the examples. 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 a thickening agent composition that does not contain component (B).

[0043] 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, 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.

[0044] 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.

[0045] 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. Other examples of hydraulic powders include cement or a mixture of cement and bentonite powder.

[0046] The ratio of water content to hydraulic powder content in the hydraulic composition, expressed by the following formula W / C = [water content (mass) / hydraulic powder content (mass)] × 100 (mass%), is preferably 45% by mass or more, more preferably 50% by mass or more, even more preferably 60% by mass or more, and from the viewpoint of economy and fluidity, preferably 150% by mass or less, more preferably 120% by mass or less, and even more preferably 100% by mass or less. In addition, if the hydraulic powder includes powders that have properties of hardening by hydration reaction such as cement, as well as powders selected from powders having pozzolanic properties, powders having latent hydraulic properties, and stone powder (calcium carbonate powder), the amounts of these are also included in the amount of hydraulic powder in this invention. Furthermore, if the powder that has properties of hardening by hydration reaction 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 related to the mass of hydraulic powder.

[0047] Furthermore, the hydraulic composition may contain aggregate. Examples of aggregate include fine aggregate and coarse aggregate. Examples of fine aggregate include those specified in JIS A0203-2014, number 2311. 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 JIS A0203-2014, number 2312. 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 and used in combination, or a single type may be used. The terminology for aggregates follows that of "Concrete General Guide" (published June 10, 1998, by Gijutsu Shoin).

[0048] 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) within the composition. 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 formwork, etc. ３ More preferably 600 kg / m ３ More preferably 700 kg / m ３ The above is true, 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 More preferably 900 kg / m ３ More preferably, 1,000 kg / m ３Therefore, 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:

[0049] The thickening agent composition of the present invention can be used for hydraulic compositions containing hydraulic powder and water. Because the hydraulic composition has high viscosity after manufacturing, it is excellent in resistance to material separation, suppression of separation in water, and prevention of water leakage into the ground. For example, it can be used for sprayed concrete, tunnel repair, construction on non-horizontal walls, as an additive for well drilling, as a foundation reinforcement liquid, pile perimeter fixing liquid, non-segregating concrete in water, pre-packed concrete, and plastic grout.

[0050] The hydraulic composition of the present invention can be applied as is, with components (A) to (E) of the aforementioned thickening agent composition, optional components, the remainder being water, and the hydraulic composition itself, including their respective content.

[0051] The present invention provides a defoaming hydraulic composition. That is, by mixing the thickening agent composition with the hydraulic composition, foaming of the hydraulic composition can be suppressed. The defoaming properties of the hydraulic composition containing the thickening agent composition can be evaluated, for example, by comparing the amount of air in the 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).

[0052] The present invention provides a method for suppressing foaming of a hydraulic composition by mixing a thickening agent composition containing (A) an amine oxide-type surfactant and (B) a fatty acid glyceride with a hydraulic composition containing hydraulic powder and water.

[0053] <Component (A): Amine oxide type surfactant> The thickening agent composition used in the method 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. [In the formula, X, R ２ and R ３The above indicates the same content as above. A amine oxide represented by ] is preferred.

[0054] In the present invention, component (A) is one or more compounds represented by the general formula (1) (hereinafter also referred to as compound (1)), and in the case of two or more compounds, X in general formula (1) is different, and at least one of the two or more compounds is R of X in general formula (1). １ａ or R １ｂ It is preferable that the compound is an alkenyl group compound. This embodiment will be described below.

[0055] Regarding compound (1), if X in general formula (1) is different, consider the case where there are two types of compound (1) as an example, and include the following embodiments. Note that in the following embodiments, of the two types of compound (1), at least one of compound (1) has R １ａ or R １ｂ (i) R １ａ or R １ｂ R is an alkyl group, and the other R is １ａ or R １ｂ (ii) The other 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) One of X is R １ａ And the other X is R １ｂ - [CONH-CH ２ CH ２ CH ２ ] ｎ - (iv) X is both R １ｂ - [CONH-CH ２ CH ２ CH ２ ] ｎ - and one n is different from the other n. (v) A combination of (i) to (iv) above.

[0056] In general formula (1), X is R １ａ or R １ｂ - [CONH-CH ２ CH ２ CH ２ ] ｎIt is a group 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. １ｂ R is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. １ｂ When is an alkenyl group, the number of carbon atoms is preferably 17 or more, and preferably 21 or less, R １ｂ When 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, and preferably 1. ２ and R ３ Each is independently preferably an alkyl group having 1 to 2 carbon atoms or (C ２ H ４ O) ｐ The group is represented by H. p is preferably a number between 0 and 5, and more preferably 1 or 2.

[0057] 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.

[0058] 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 １ａPreferably, 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 R in the general formula (1). １ａ And R １ａ It is preferable that the compound is an alkenyl group.

[0059] (A) As a component, X in general formula (1) is R １ａ or R １ｂ - [CONH-CH ２ CH ２ CH ２ ] ｎ Examples include a combination of compound (1a) which is a group represented by - and compound (1b) which is different from compound (1a) in that X in general formula (1). Specifically, as component (A), examples include a combination of compound (1a) represented by the following general formula (1a) and compound (1b) represented by the following general formula (1b). [In the formula, n1, n2, R １１ａ , R １１ｂ , R ２ and R ３ This indicates the same content as above.

[0060] 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.

[0061] 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), n2 is 0 and 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, １１ｂThe 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.

[0062] In general formula (1a) or (1b), R ２ and R ３ Each is independently preferably an alkyl group having 1 or 2 carbon atoms or -(C ２ H ４ O) ｐ The group is represented by H, and more preferably an alkyl group having 1 or 2 carbon atoms. In general formula (1a) or (1b), p is preferably an integer between 0 and 3. When n1 and n2 are the same number, R １１ｂ The alkenyl group is R １１ａ It is a different alkenyl group.

[0063] 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).

[0064] [In the formula, n2, R １１ａ , R １１ｂ , R ２ and R ３ This indicates the same content as above.

[0065] 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 A 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.

[0066] 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).

[0067] 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.

[0068] 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 also 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 also 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.

[0069] Furthermore, the mass ratio of the amine oxide (1a) content to the amine oxide (1b) content, expressed by the following formula [amine oxide (1a) content] / [amine oxide (1b) content], is preferably 0.05 or higher, more preferably 0.1 or higher, even more preferably 0.2 or higher, and from the same viewpoint, preferably 2 or lower, more preferably 1 or lower, and even more preferably 0.5 or lower.

[0070] 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.

[0071] 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.

[0072] <Component (B)> 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 increases the viscosity of the thickening agent composition for hydraulic compositions at low shear conditions by generating crystals of more uniform size and shape, thus increasing the viscosity of the thickening agent composition for hydraulic compositions. ２ It is preferable that the amount be 100g or less, and 4g-I ２ / 100g or less is more preferable, 3g-I ２ / 100g or less is more preferable, 2g-I ２A value of 100g or less is more preferable. 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 means that the substance is solid at room temperature and has the property of reversibly detecting an endothermic peak (melting point) when the temperature is increased in differential scanning calorimetry. Crystallinity includes all single crystals, perfect crystals, mosaic crystals, polycrystalline, and microcrystalline substances. For example, the temperature (melting point) of the peak of the endothermic peak detected at the highest temperature when the temperature is increased in differential scanning calorimetry of component (B) can be determined using a differential scanning calorimetry (DSC) by the following method.・Sample preparation Measurement sample: 10 mg of component (B) placed in an aluminum pan with a lid and sealed with the lid. Reference: An aluminum pan with the lid on, without any contents inside. ・Measurement method Set the sample and reference in a TA Instruments DSC (Q2000). Increase the temperature from 30°C to 95°C at a rate of 5°C / min, hold at 95°C for 5 minutes, then decrease the temperature to 25°C at a rate of 20°C / min, and then increase the temperature 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 is taken as the melting point of component (B). At least one type of component (B) may be used, and two or more types can 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 carbon-18 aliphatic acyl group.

[0073] 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.

[0074] (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, in 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.

[0075] 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.

[0076] 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, the thickening agent composition of the present invention preferably further contains an antifoaming agent (excluding component (B)). From the viewpoint of antifoaming properties, one or more antifoaming agents selected from silicone-based antifoaming agents, fatty acid ester-based antifoaming agents, ether-based antifoaming agents, and aliphatic amine-based antifoaming agents are preferred as components (D), with silicone-based antifoaming agents being more preferred. Dimethylpolysiloxane is more preferred among silicone-based antifoaming agents, polyalkylene glycol fatty acid ester is more preferred among fatty acid ester-based antifoaming agents, polyalkylene glycol alkyl ether is more preferred among ether-based antifoaming agents, and alkyldimethylamine or its salt is more preferred among aliphatic amine-based antifoaming agents.

[0077] 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.

[0078] 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 and thickening properties, and also preferably 25 parts by mass or less, more preferably 20 parts by mass or less.

[0079] 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.

[0080] 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.

[0081] 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. Other examples of hydraulic powders include cement or a mixture of cement and bentonite powder.

[0082] The ratio of water content to hydraulic powder content in the hydraulic composition, expressed by the following formula W / C = [water content (mass) / hydraulic powder content (mass)] × 100 (mass%), is preferably 45% by mass or more, more preferably 50% by mass or more, even more preferably 60% by mass or more, and from the viewpoint of economy and fluidity, preferably 150% by mass or less, more preferably 120% by mass or less, and even more preferably 100% by mass or less. In addition, if the hydraulic powder includes powders that have properties of hardening by hydration reaction such as cement, as well as powders selected from powders having pozzolanic properties, powders having latent hydraulic properties, and stone powder (calcium carbonate powder), the amounts of these are also included in the amount of hydraulic powder in this invention. Furthermore, if the powder that has properties of hardening by hydration reaction 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 related to the mass of hydraulic powder.

[0083] Furthermore, the hydraulic composition may contain aggregate. Examples of aggregate include fine aggregate and coarse aggregate. Examples of fine aggregate include those specified in JIS A0203-2014, number 2311. 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 JIS A0203-2014, number 2312. 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 and used in combination, or a single type may be used. The terminology for aggregates follows that of "Concrete General Guide" (published June 10, 1998, by Gijutsu Shoin).

[0084] 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) within the composition. 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 formwork, etc. ３ More preferably 600 kg / m ３ More preferably 700 kg / m ３ The above is true, 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 More preferably 900 kg / m ３ More preferably, 1,000 kg / m ３ Therefore, 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:

[0085] 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 blended into 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.

[0086] Furthermore, the present invention provides the use of the thickening agent composition of the present invention in suppressing foaming of hydraulic compositions. The preferred embodiments and contents of each component of the thickening agent composition in this use, as well as the amount to be added to the hydraulic composition, can be applied as described above. Examples

[0087] Six types of thickening agent compositions, formulations 1 to 6, were manufactured as follows. The components used in the manufacturing process are as follows: <(A) component, (C) component, and water mixture> Amine oxide type surfactant 1 (mixture of 6% by mass of oleyldimethylamine oxide, 24% by mass of oleamidepropyldimethylamine oxide, 30% by mass of propylene glycol, and 40% by mass of water) Amine oxide type surfactant 2 (mixture of 30% by mass of oleamidepropyldimethylamine oxide, 30% by mass of propylene glycol, and 40% by mass of water) <(B) component> Kao Wax 85P (hydrogenated castor oil, powder, 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> 992 g of amine oxide type surfactant 1 and 8 g 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> 942 g of amine oxide type surfactant 1 and 8 g 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, 50 g of Antifoam E-20 was added, and formulation 2 was obtained by stirring at 200 rpm for a further 30 minutes.

[0090] <Formulation 3> 976 g of amine oxide type surfactant 2 and 4 g 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, 20 g of Asahi Silicone AF-146 was added, and formulation 3 was obtained by stirring at 200 rpm for a further 30 minutes.

[0091] <Formulation 4> 950 g of amine oxide type surfactant 1 and 50 g of antiform E-20 were weighed into a three-necked flask and stirred at 200 rpm for 30 minutes to obtain formulation 4.

[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 200 rpm for 30 minutes.

[0093] <Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-2> Formulas 1 to 5 were prepared using the above method, and their appearance was observed after being stored in a constant temperature bath at 40°C for one month. If the appearance remained uniformly cloudy, it was classified as "homogenic," and 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]

[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 Co., Ltd. and Sumitomo Osaka Cement Co., Ltd. in a mass ratio of 1:1) was mixed with the above formulations 1, 2, 4 or amine oxide type surfactant 1 as a hydraulic powder, and storage stability, air content, and the balance between storage stability and defoaming properties were evaluated.

[0097] Example 2-1 800 g of ordinary Portland cement was measured into a 1000 mL plastic cup. 640 g of water was added and stirred with a cooking hand mixer for 30 seconds. Next, 6.4 g of formulation 1 was added and stirred 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 Content Measurement> The air content 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 air content (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 formulation 4 was used instead of formulation 1. Formulation 4 was shaken well to ensure uniformity before being added to the cement grout.

[0102] Storage stability refers to the storage stability of the thickening agent composition blended into the hydraulic composition. Using the air content of Comparative Example 2-1, which used amine oxide-type surfactant 1, as a baseline of 20.5% by volume, a reduction to half or less was considered excellent defoaming properties. If both storage stability and defoaming properties were achieved, it was judged as "excellent"; otherwise, it was judged as "bad." The results are shown in Table 2. Note that the amine oxide-type surfactant 1 in Comparative Example 2-1, which does not contain a conventional defoaming agent, was judged as "homogenic" in appearance. However, since it does not contain a defoaming agent, it is not subject to storage stability assessment, and therefore the storage stability of Comparative Example 2-1 is listed as "-".

[0103]

[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 thickening agent composition containing (A) component: amine oxide type surfactant, and (B) component: fatty acid glyceride.

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 any one of claims 1 to 3, 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 any one of claims 1 to 4, 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 any one of claims 1 to 5, wherein the melting point of component (B) is 70°C or higher and 95°C or lower.

7. The thickening agent composition according to any one of claims 1 to 6, further comprising an antifoaming agent (excluding component (B)) as component (D).

8. 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 (A) component: amine oxide type surfactant, (B) component: fatty acid glyceride, and water at a temperature above the melting point of (B) to obtain a solution; and crystallizing (B) component 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 method for suppressing foaming of a hydraulic composition by mixing a thickening agent composition containing (A) an amine oxide-type surfactant and (B) a fatty acid glyceride with a hydraulic composition containing hydraulic powder and water.

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 any one of claims 12 to 14, wherein the thickening agent composition further contains an antifoaming agent (excluding component (B)) as component (D).

16. Use of the thickening agent composition according to any one of claims 1 to 7, which contains (A) component: amine oxide type surfactant and (B) component: fatty acid glyceride, in suppressing foaming of a hydraulic composition.

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