JP2007099561A - Rheology modifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rheology modifier capable of exhibiting excellent viscosity imparting effect to a slurry or an aqueous solution in a wide temperature range even when the concentration of its effective components is low. <P>SOLUTION: The rheology modifier comprises: a quaternary ammonium salt (A) having at least one 10-26C hydrocarbon group; and m-xylenesulfonic acid or its salt (B) each in a specified range and a specified molar ratio (B)/(A). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rheology modifier for controlling the viscosity of a slurry or an aqueous solution. More specifically, the present invention relates to a water-containing powder that is used as civil engineering / building materials, secondary product materials, and repair materials. The present invention relates to a rheology modifier capable of imparting properties excellent in viscosity and material separation resistance to powder slurry and the like.

  In general, in order to control the rheological properties such as viscosity in a slurry of water and powder, the ratio of water and powder is adjusted, the dispersion state of particles is changed with a pH adjuster, or the water-absorbing polymer. Technology such as adding water to control the amount of surplus water has been used.

  In particular, the technology that adds water-soluble polymer compounds to the slurry system and uses the thickening action due to the entanglement of the polymer can be used for a wide range of applications, mainly in the civil engineering and construction fields, because it can provide a large thickening effect at low cost. It has become. For example, cellulose derivatives such as methylcellulose and hydroxyethylcellulose, and water-soluble polymer compounds such as poly (ethylene oxide) are used in pastes, mortars, underwater concrete and high-fluidity concrete to increase the separation resistance of materials. Has been.

  However, in order to obtain an efficient thickening effect using a water-soluble polymer compound, it is necessary to use a compound having a molecular weight of a certain level or more, and the actually used compound has a molecular weight of several hundred thousand or more. Most are things. These water-soluble polymer compounds having a large molecular weight are added together with water and powder, and unless they are kneaded over time, it is difficult to develop sufficient viscosity, and a thickening effect cannot be obtained quickly. When used as, there is a problem that the viscosity of the aqueous solution is high and workability is lowered in terms of addition operation and the like.

  In addition, when water-soluble polymers are used in pastes, mortars, and concretes, there are many formulations with a small powder ratio (water powder ratio of 30% or more), and the viscosity with time increases as the water powder ratio increases. The stability of the material is reduced, and material separation such as breathing water is likely to occur.

  Further, when it is desired to coexist an aqueous slurry system with an aqueous phase, the conventional technique may cause the slurry system to elute into the aqueous phase and maintain the initial slurry composition. In the field of civil engineering, for example, in so-called underwater concrete intended for placement in lakes and seas, it is not possible to obtain sufficient separation resistance in water simply by adding a water-soluble polymer compound. In order to do so, an alkali metal sulfate is used in combination. However, the alkali metal salt may cause a decrease in compressive strength or a significant decrease in fluidity of the concrete depending on the amount of the alkali metal salt, and it may be difficult to produce a concrete having high separation resistance in water with a stable quality. In addition, in the case of the grout method in which a cement paste with high water powder ratio (so-called cement milk) is injected into the ground for ground improvement, there is a problem that the composition of the cement milk becomes unstable when groundwater springs out. is there. Furthermore, when a copolymer is used as the polymer compound, there is also a problem that it is likely to affect the dispersion state of the slurry by adsorbing to a powder such as cement. As a technique of using a surfactant to improve fluidity, there is a thickener combination for building materials. This is a combined system of a nonionic cellulose ether which is a polymer compound, and although the viscosity itself can be increased, it has not yet improved the resistance to separation of breathing water and water.

  As means for solving the above problems, a proposal using a thickening action of a surfactant has been made. Furthermore, during actual use, the viscosity of the slurry may change due to temperature changes, and a technique that can maintain stability against temperature changes is desired.

Patent Documents 1 and 2 disclose that a mixture of an aqueous solution is used as a slurry rheology modifier in combination with first and second compounds that exhibit a specific viscosity behavior. It is disclosed that a rheology modifier is obtained by combining at least two kinds of secondary salt type cationic surfactants with an anionic aromatic compound or an inorganic bromine salt.
JP 2003-313536 A JP 2003-313537 A JP 2003-261860 A

  The modifiers of Patent Documents 1 to 3 have no problem in workability, exhibit a sufficient viscosity when kneaded in a short time when producing a slurry, and can be used in a wide temperature range. The resistance is stable. It is desirable that the amount of such modifier added can be reduced and that the viscosity-imparting effect on the slurry or aqueous solution can be expressed in a wide temperature range. Furthermore, it is more preferable that both of these can be achieved.

  The subject of this invention is providing the rheology modifier which can express a favorable viscosity imparting effect in a wide temperature range with respect to a slurry and aqueous solution, even if an active ingredient is a low density | concentration.

  The present invention contains a quaternary ammonium salt (A) having at least one hydrocarbon group having 10 to 26 carbon atoms and metaxylene sulfonic acid or a salt thereof (B), and (A) and (B) The total is the effective component concentration in the aqueous phase of 0.01 to less than 0.3% by weight, and the molar ratio (B) / (A) between (A) and (B) is less than 0.5 to 1.5. Relates to a rheology modifier (hereinafter referred to as a first rheology modifier) to be added.

  Further, the present invention provides a quaternary ammonium salt (A1) having at least one hydrocarbon group having 10 to 26 carbon atoms and a counter anion which is an alkyl sulfate ester ion having 1 to 2 carbon atoms and metaxylene sulfonic acid. Or a salt thereof (B), which is added so that the total of (A1) and (B) is 0.01 to less than 0.97% by weight in the effective component concentration in the aqueous phase. Agent (hereinafter referred to as second rheology modifier).

  In addition, the present invention provides a rheology modifier (hereinafter referred to as “No. 1”) containing a quaternary ammonium salt (A) having at least one hydrocarbon group having 10 to 26 carbon atoms and styrene sulfonic acid or a salt thereof (C). 3 rheology modifier).

  Moreover, this invention relates to the manufacturing method of a slurry which adds the rheology modifier of the said this invention to the slurry containing powder.

  ADVANTAGE OF THE INVENTION According to this invention, even if an active ingredient is a low density | concentration, the rheology modifier which can express a favorable viscosity imparting effect in a wide temperature range with respect to a slurry or aqueous solution is provided.

<First rheology modifier>
As a C10-C26 hydrocarbon group which a compound (A) has, an alkyl group and / or an alkenyl group, especially alkyl are preferable. The alkyl group and / or alkenyl group may be linear or branched.

  Specifically, the compound (A) includes, for example, alkyl (10 to 26 carbon atoms) trimethylammonium salt, alkyl (10 to 26 carbon atoms) dimethylethylammonium salt, alkyl (10 to 26 carbon atoms) pyridinium salt, alkyl (C10-26) imidazolinium salt, alkyl (C10-26) dimethylbenzylammonium salt, etc. are mentioned.

  More specifically, hexadecyltrimethylammonium chloride, hexadecyltrimethylammonium bromide, octadecyltrimethylammonium chloride, octadecyltrimethylammonium bromide, behenyltrimethylammonium chloride, behenyltrimethylammonium bromide, tallow trimethylammonium chloride, tallow trimethylammonium bromide, hydrogenation Tallow trimethylammonium chloride, hydrogenated tallow trimethylammonium bromide, hexadecylpyridinium chloride, hexadecylpyridinium bromide, octadecylpyridinium chloride, octadecylpyridinium bromide, 1,1-dimethyl-2-hexadecylimidazolinium chloride, hex Decyl dimethyl benzyl ammonium chloride, tetra-de siloxy trimethyl ammonium chloride, hexadecene siloxy trimethyl ammonium chloride, octadecenyl siloxy trimethyl ammonium chloride, and the like. Specifically, from the viewpoint of water solubility and thickening effect, hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, tallow trimethylammonium chloride, hexadecylpyridinium chloride and the like are preferable.

  Further, a quaternary ammonium salt having at least one hydrocarbon group having 10 to 26 carbon atoms and a counter anion being an alkyl sulfate ion having 1 to 2 carbon atoms [hereinafter referred to as compound (A1)] is used. You can also. Examples of the compound (A1) include hexadecyl trimethyl ammonium methosulfate, hexadecyl dimethyl ethyl ammonium ethosulfate, octadecyl trimethyl ammonium methosulfate, octadecyl dimethyl ethyl ammonium ethosulfate, tallow trimethyl ammonium methosulfate, tallow dimethyl ethyl ammonium ethosulfate, 1, 1-dimethyl-2-hexadecylimidazolinium methosulfate, and the like. Compound (A1) can be obtained by quaternizing a tertiary amine with dimethyl sulfate or diethyl sulfate.

  As a salt of metaxylenesulfonic acid or a salt thereof (B) [hereinafter referred to as compound (B)], an alkali metal salt such as sodium salt or potassium salt is preferable, and a sodium salt is particularly preferable.

  In the first rheology modifier, the total of the compound (A) and the compound (B) is 0.01 to less than 0.3% by weight, preferably 0.1 to 0.3% in terms of the effective component concentration in the aqueous phase. It is added to the slurry or the aqueous solution so that it is less than wt%, more preferably less than 0.2 to 0.3 wt%.

  In the first rheology modifier, the molar ratio (B) / (A) of the compound (A) to the compound (B) is 0.5 to less than 1.5, preferably 0.7 to 1. 4, more preferably 0.8 to 1.3. The molar ratio here is calculated as [total number of moles of all compounds belonging to compound (B)] / [total number of moles of all compounds belonging to compound (A)] (the same applies hereinafter).

  In the first rheology modifier of the present invention, the specific compound (A) and the compound (B) are used in combination at the specific molar ratio described above, whereby the effective amount used [compound (A) and compound (B )) In a small range of 0.01 to less than 0.3% by weight, an excellent viscosity imparting effect is exhibited in a wide temperature range.

<Second rheology modifier>
In the second rheology modifier of the present invention, the compound (A1) and the compound (B) are used in combination. In the second rheology modifier, the total amount of the compound (A1) and the compound (B) is 0.01 to less than 0.97% by weight, preferably 0.2 to 0.97 in terms of the effective component concentration in the aqueous phase. It is added to the slurry or the aqueous solution so as to be 0.5% by weight, more preferably 0.5 to 0.97% by weight. Compound (A1) and compound (B) may be the same as the first rheology modifier. In the second rheology modifier, the molar ratio (B) / (A1) of the compound (A1) to the compound (B) is preferably 0.5 to 1.5 from the viewpoint of efficient viscosity expression. More preferably, it is 0.7-1.4, Most preferably, it is 0.8-1.3.

  In the second rheology modifier of the present invention, by using the compound (A1) in which the counter ion is an alkyl sulfate ion as the compound used in combination with the compound (B), the effective amount [compound (A1) and Even in a small range of 0.01 to less than 0.97% by weight of the total amount of the compound (B), an excellent viscosity imparting effect is exhibited in a wide temperature range.

<Third rheology modifier>
In the third rheology modifier of the present invention, compound (A) and styrene sulfonic acid or a salt thereof (hereinafter referred to as compound (C)) are used in combination. In the compound (C), the salt of styrenesulfonic acid is preferably an alkali metal salt such as a sodium salt or a potassium salt, and particularly preferably a sodium salt.

  In the third rheology modifier, the total of the compound (A) and the compound (C) is preferably an effective component concentration in the aqueous phase, preferably 0.01 to 20% by weight, more preferably 0.1 to 10% by weight. %, Particularly preferably 0.3 to 3% by weight, is added to the slurry or aqueous solution. The same compound (A) as the first rheology modifier can be used. In the third rheology modifier, the molar ratio (C) / (A) of the compound (A) to the compound (C) is preferably 0.5 to 1.5 from the viewpoint of efficient expression of viscosity. More preferably, it is 0.7-1.4, Most preferably, it is 0.8-1.3.

  In the third rheology modifier of the present invention, by using styrene sulfonic acid or a salt thereof [compound (C)] as a compound used in combination with the compound (A), an excellent viscosity imparting effect is exhibited in a wide temperature range. To do.

<Rheology modifier>
In the first, second, and third rheology modifiers of the present invention, the compound (A) or the compound (A1) includes a counter ion, a group that substitutes a nitrogen atom, the number of cationized nitrogens, and the presence or absence of a ring structure. It is preferable to use at least two kinds of structurally different ones (for example, alkyl chain length) in combination. That is, it is preferable to use at least one compound A ′ belonging to the compound (A) or the compound (A1) and another compound A ″ structurally different from this. The weight ratio of the two compounds to the compound (A) or the compound (A1) is such that A ′ / A ″ is 5/95 to 95/5 from the viewpoint of developing a thickening effect over a wide temperature range. Is preferable, 10/90 to 90/10 is more preferable, and 25/75 to 75/25 is particularly preferable.

  In the present invention, the combination of compound (A) and compound (B), or compound (A) and compound (B), or compound (A) and compound (C) is the viscosity of compound (A) or compound (A1). The viscosity of a mixed aqueous solution in which an aqueous solution of 100 mPa · s or less and an aqueous solution of the compound (B) or the compound (C) having a viscosity of 100 mPa · s or less is mixed at a weight ratio of 50/50 is greater than the viscosity of any aqueous solution before mixing. Is preferably a combination of compounds that can be at least twice as high. More preferably, one that can be increased by at least 5 times, more preferably at least 10 times, even more preferably at least 100 times, particularly preferably at least 500 times higher is used. In particular, it is preferable that the first and second rheology modifiers satisfy the above viscosity relationship under the conditions of effective component concentrations in the aqueous phase of the first and second rheology modifiers. Further, the first rheology modifier preferably satisfies the above viscosity relationship under the condition of the molar ratio of the first rheology modifier. Here, the viscosity refers to that measured with a B-type viscometer (No. 3 rotor, 1.5 r / min to 12 r / min) at 20 ° C. In this case, the viscosity behavior may be expressed at any rotational speed from 1.5 r / min to 12 r / min. Furthermore, from the viewpoint of operability when the rheology modifier of the present invention is added to a thickening system, an aqueous solution of the compound (A) or the compound (A1) before mixing, the compound (B) or the compound (C). Each of the aqueous solutions has a viscosity at 20 ° C. of preferably 50 mPa · s or less, more preferably 10 mPa · s or less, and it is desirable that the same thickening effect is exhibited when the two solutions are mixed.

  In the present invention, when the compound (A) and the compound (B), the compound (A1) and the compound (B), or the compound (A) and the compound (C) are added to the slurry or the aqueous solution, Furthermore, it is considered that string-like micelles, which are so-called high-order structures of low-molecular compounds, are formed, and further, these string-like micelles form aggregates, thereby increasing the viscosity of the slurry and the entire aqueous solution. In addition, the rheological properties of the string micelles are high in viscoelasticity, and the string micelle aggregates are entangled with each other in the aqueous phase of the slurry or in an aqueous solution to form a three-dimensional network aggregate. It is thought that. Due to this feature, the powder particles in the slurry of the present invention are covered with a network-like aggregate of string-like micelles with high viscoelasticity, so that even when water is present at the use site, it is not diluted, Since it can be filled, for example, compared with conventional cement milk and mortar, the amount of slurry diffused in water is much smaller, and water pollution around the construction site, ground water, downstream of the river, and drainage facilities can be reduced.

  Moreover, in the combination of the compounds of the present invention, both compounds form a network aggregate by molecular association in the slurry, so that high viscosity can be imparted to the slurry. Since general water-soluble polymers are linked by covalent bonds, the bonds deteriorate when subjected to shearing forces such as stirring, and eventually the bonds are cut and the molecular weight is reduced. Since a large structure is formed by molecular association due to intermolecular force, even if the aggregate is broken by shearing force, it easily recombines and refuses to reconstruct the aggregate of the original shape Conceivable. This feature is particularly effective for slurry systems in which powder particles, sand, gravel, etc. are present. For example, uniform mixing of powder particles, sand, gravel, etc., filling that generates internal friction, injection, and pumping, the aggregates are broken and the viscosity decreases significantly. When the process is completed and the stress is released, aggregates are formed again, so that an appropriate viscosity can be recovered and material separation resistance can be imparted to the slurry. And in the combination of the compounds having such characteristics, by further selecting the compound (B) or the compound (C), the present invention is excellent in a wide temperature range even when the effective component concentration is lowered. A viscosity imparting effect can be obtained.

  In the rheology modifier of the present invention, the compound (A) and the compound (B), the compound (A1) and the compound (B), or the compound (A) and the compound (C) may be a concentrated aqueous solution of each compound alone. Since the viscosity is low, the effective concentration of the aqueous solution before addition to the slurry system or aqueous solution is preferably 10% by weight or more, more preferably 20% by weight or more, still more preferably 30% by weight or more, and most preferably 40% by weight or more. Thus, productivity can be improved such that the storage tank can be reduced in size.

  A surfactant can be used in combination with the rheology modifier of the present invention. As the surfactant, amphoteric surfactants and nonionic surfactants are preferable. In particular, betaine compounds and compounds obtained by adding alkylene oxide to alcohol are preferred.

  The rheology modifier of the present invention can be used in combination with a solvent for viscosity adjustment. As the solvent, alcohol or cellosolve solvent is preferable.

  In the rheology modifier of the present invention, other components such as a dispersant, an AE agent, a retarder, an early strengthener, an accelerator, a foaming agent, a foaming agent, an It may contain a foaming agent, a rust preventive agent, a colorant, an antifungal agent, a crack reducing agent, a swelling agent, a dye, a pigment, a scale inhibitor, a slime treatment agent, a preservative, an emulsifier and the like.

  If a compound (A) and a compound (B), or a compound (A1) and a compound (B), or a compound (A) and a compound (C) are added to the slurry, a rheology-modified slurry is obtained. The addition form of the rheology modifier according to the present invention is not particularly limited.

  The rheology modifier according to the present invention is a state in which the compound (A) and the compound (B), the compound (A1) and the compound (B), or the compound (A) and the compound (C) are each in an extremely low viscosity aqueous solution state. However, when they are added to the slurry system, each is added at a temperature of 100 mPa · s or less, preferably 50 mPa · s or less, more preferably 10 mPa or less. -It is preferable to use it in the state of the aqueous solution of the viscosity below s.

  In this invention, the manufacturing method of the slurry which adds a compound (A) and a compound (B), or a compound (A1) and a compound (B), or a compound (A) and a compound (C) to the slurry containing powder. Is provided. In that case, one of the two compounds can be added to the slurry, and the other compound can be added to the slurry.

  Moreover, since two compounds in a compound (A) and a compound (B), or a compound (A1) and a compound (B), or a compound (A) and a compound (C) can be mixed in arbitrary orders in a slurry, It is preferable from the viewpoint of workability to add the above compound to the slurry at an appropriate stage and add the other to the slurry at a stage where viscosity is required. The state of each compound when added may be liquid or powder.

  When the rheology modifier of the present invention is used in a slurry system using a hydraulic powder such as cement, the hydration reaction of cement particles can be controlled, and from the viewpoint of suppressing entrained bubbles during slurry stirring. It is preferable that the compound (B) or the compound (C) is added to the slurry first, and then the compound (A) or the compound (A1) is added later.

Moreover, in the manufacturing method of the slurry or aqueous solution of this invention, in the aqueous phase of a compound (A) and a compound (B), or a compound (A1) and a compound (B), or a compound (A) and a compound (C). Since the effective component concentration expresses a large viscosity even at a low addition amount, the compound (A) and the compound (B), or the compound (A1) and the compound (B), or the compound (A) and the compound (C), It is preferable to add to the slurry or the aqueous solution under the conditions selected from the following (1) to (3).
(1): The sum of (A) and (B) is 0.01 to less than 0.3% by weight in the effective component concentration in the aqueous phase of the slurry or in the aqueous solution, and the molar ratio (B) / (A) is It adds to a slurry or aqueous solution so that it may become less than 0.5-1.5.
(2): It is added to the slurry or the aqueous solution so that the sum of (A1) and (B) is 0.01 to 0.97% by weight in the effective concentration of the aqueous phase of the slurry or the aqueous solution.
(3): (A) and (C) are added to the slurry or aqueous solution so that the total concentration of (A) and (C) in the aqueous phase of the slurry or the aqueous solution of the aqueous solution is 0.01 to less than 20 wt%.

  That is, in the first rheology modifier of the present invention, the total of the compound (A) and the compound (B) is 0.01 to less than 0.3% by weight in an effective component concentration in the aqueous phase of the slurry or in the aqueous solution. The rheology modifier added to the slurry or aqueous solution so that the molar ratio (B) / (A) of the compound (A) to the compound (B) is 0.5 to less than 1.5. Further, the second rheology modifier of the present invention is such that the total of the compound (A1) and the compound (B) is 0.01 to less than 0.97% by weight in the effective concentration of the slurry in the aqueous phase or aqueous solution. The rheology modifier added to the slurry or aqueous solution. In the third rheology modifier of the present invention, the total amount of the compound (A) and the compound (C) is preferably 0.01 to less than 20% by weight in the effective concentration of the aqueous phase of the slurry or the aqueous solution. Thus, the rheology modifier is added to the slurry or aqueous solution.

  In the present invention, the compound (A) and the compound (B), or the compound (A1) and the compound (B), or the compound (A) and the compound (C) may be used in either an aqueous solution or a powder state. The rheology modifier of the present invention can impart good slurry or aqueous rheological properties in either form. If the compound (A) and the compound (B), or the compound (A1) and the compound (B), or the compound (A) and the compound (C) are used in a powder form in advance, workability in premix applications and the like is good. It becomes.

  The slurry production method of the present invention can be applied to a slurry having a water powder ratio (water / powder weight ratio) of 20 to 1000%. As the powder, a hydraulic powder having physical properties that are cured by a hydration reaction can be used. For example, cement and gypsum are mentioned. A filler can also be used, and examples thereof include calcium carbonate, fly ash, blast furnace slag, silica fume, bentonite, and clay (natural minerals mainly containing hydrous aluminum silicate: kaolinite, halosite, and the like). These powders may be used alone or in combination. Furthermore, sand, gravel, and a mixture thereof may be added as aggregate to these powders as necessary. Moreover, it can also apply to the slurry and soil of inorganic oxide type powders other than the above, such as titanium oxide.

  Further, the compound (A) and / or the compound (B), the compound (A1) and / or the compound (B), or the compound (A) and / or the compound (C) and the hydraulic powder in the present invention are premixed. Thus, a hydraulic powder composition containing the rheology modifier of the present invention can be prepared.

  A slurry containing the modifier of the present invention can be obtained by a method such as adding the rheology modifier of the present invention to a slurry prepared in advance or adding the rheology modifier during slurry production. In particular, the compound (A) and the compound (B), or the compound (A1) and the compound (B), or one of the compound (A) and the compound (C) and a powder, for example, a hydraulic powder such as cement A method of preparing a slurry containing water and then adding the other of the two compounds to the slurry is preferable from the viewpoint of workability. Further, the total effective amount of the compound (A) and the compound (B), or the compound (A1) and the compound (B), or the compound (A) and the compound (C) is an effective concentration in the aqueous phase of the slurry, It is preferable to use so that it may become a predetermined density | concentration.

Example 1
(1) Used components and polycarboxylic acid-based dispersant: Aquacat FC900 manufactured by Nippon Shokubai Co., Ltd. (effective portion 40%)
Compound (X1): alkyltrimethylammonium chloride (alkyl composition: carbon number 16 / carbon number 18 = 50/50, weight ratio), used as a 29% by weight aqueous solution Compound (Y1): sodium paratoluenesulfonate, 20% Used as% aqueous solution, expressed as PTSNa in the table.
Compound (Y2): sodium metaxylene sulfonate, used as a 20 wt% aqueous solution, expressed as mXySNa in the table.
Compound (Y3): Sodium styrenesulfonate, used as a 15% by weight aqueous solution, expressed as NaSS in the table.

  The dispersant was used so that the amount of the dispersant was 0.75% by weight with respect to the cement weight in the mortar. Further, the compound (X1) and any one of the compounds (Y1) to (Y3) are used in equimolar amounts to form a rheology modifier, so that the concentrations shown in Table 2 (concentrations as aqueous solutions) are obtained. Using. The amount of air was adjusted to 5% or less using an antifoaming agent.

(2) Evaluation The mortar viscosity and the mortar flow value of the mortar prepared by blending Table 1 using the above components were measured. Of the blends shown in Table 1, sand (S) and cement (C) were kneaded with a mortar mixer for 10 seconds, and then mixed with water in which a predetermined amount of components other than the compound (X1) was dissolved for 30 seconds. Knead. After adding compound (X1) and kneading at low speed for 60 seconds, mortar viscosity and mortar flow value were measured. The mortar viscosity was 20 ° C., Viscotester VT-04E, No. One rotor (measuring range: 300 to 1500 mPa · s) was immersed in mortar from the lower end to 25 mm and measured. Moreover, the mortar flow value measured the value 5 minutes after the flow start using the mortar cone. The results are shown in Table 2.

The materials used in Table 1 are as follows.
C: Ordinary cement (ordinary Portland cement manufactured by Taiheiyo Cement Co., Ltd., density 3.16 g / cm ³ )
W: Ion-exchanged water S: Mountain sand from Kimitsu, Chiba Prefecture (surface dry density 2.58 g / cm ³ )

表２中、レオロジー改質剤の水中濃度とは、水相中の有効分の合計濃度である（以下同様）。

In Table 2, the concentration of the rheology modifier in water is the total concentration of effective components in the aqueous phase (the same applies hereinafter).

Example 2
(1) Used component / compound (X1): alkyltrimethylammonium chloride (alkyl composition: carbon number 16 / carbon number 18 = 50/50, weight ratio), used as a 29% by weight aqueous solution, expressed as trimethylCl in the table To do.
Compound (X2): Alkyldimethylethyl ethyl sulfate (alkyl composition: carbon number 16 / carbon number 18 = 80/20, weight ratio), used as a 15 wt% aqueous solution, expressed as ES cation in the table.
Compound (Y1): used as sodium paratoluenesulfonate, 20% by weight aqueous solution, indicated as PTSNa in the table.
Compound (Y2): sodium metaxylene sulfonate, used as a 20 wt% aqueous solution, expressed as mXySNa in the table.
Compound (Y3): Sodium styrenesulfonate, used as a 15% by weight aqueous solution, expressed as NaSS in the table.

  Any of the above compounds (X1) to (X2) [denoted as compound (X) in the table] and any of compounds (Y1) to (Y3) [denoted as compound (Y) in the table] Was used as a rheology modifier so as to be equimolar, and were used so as to have the concentrations shown in Table 4 (concentration as an aqueous solution).

(2) Evaluation The viscosity of the paste prepared with the composition shown in Table 3 using the above components was measured. Cement (C) having the composition shown in Table 3 and water in which a predetermined amount of components other than the compounds (X1) and (X2) among the above components are dissolved are mixed and kneaded for 30 seconds. After adding compound (X1) or (X2) and kneading at low speed for 60 seconds, the viscosity of the paste was measured. The paste viscosity was 20 ° C., Viscotester VT-04E, No. It measured with 1 rotor (measurement range 300-1500 mPa * s). The results are shown in Table 4.

The materials used in Table 3 are as follows.
C: Ordinary cement (ordinary Portland cement manufactured by Taiheiyo Cement Co., Ltd., density 3.16 g / cm ³ )
W: Ion exchange water

Example 3
(1) Used component / compound (X1): alkyltrimethylammonium chloride (alkyl composition: carbon number 16 / carbon number 18 = 50/50, weight ratio), used as a 29% by weight aqueous solution, expressed as trimethylCl in the table To do.
Compound (Y1): used as sodium paratoluenesulfonate, 20% by weight aqueous solution, indicated as PTSNa in the table.
Compound (Y2): sodium metaxylene sulfonate, used as a 20 wt% aqueous solution, expressed as mXySNa in the table.
Compound (Y3): Sodium styrenesulfonate, used as a 15% by weight aqueous solution, expressed as NaSS in the table.

  Using the compound (X) and any one of the compounds (Y1) to (Y3) [denoted as the compound (Y) in the table] in an equimolar amount, a rheology modifier is used. It used so that it might become a concentration (concentration as an aqueous solution).

(2) Evaluation The viscosity of the paste prepared using the above components and blended in Table 5 was measured. Cement (C) having the composition shown in Table 5 and water in which a predetermined amount of components other than compound (X) among the above components are dissolved are mixed and kneaded for 30 seconds. After adding compound (X) and kneading at low speed for 60 seconds, the viscosity of the paste was measured in the same manner as in Example 2. However, the measurement temperature was varied as shown in Table 6. The results are shown in Table 6.

The materials used in Table 5 are as follows.
C: Ordinary cement (ordinary Portland cement manufactured by Taiheiyo Cement Co., Ltd., density 3.16 g / cm ³ )
W: Ion exchange water

Claims (5)

It contains a quaternary ammonium salt (A) having at least one hydrocarbon group having 10 to 26 carbon atoms and metaxylene sulfonic acid or a salt thereof (B), and the sum of (A) and (B) is an aqueous phase. It is added so that the effective component concentration in it is 0.01 to less than 0.3% by weight and the molar ratio (B) / (A) of (A) to (B) is less than 0.5 to 1.5. , Rheology modifier. A quaternary ammonium salt (A1) having at least one hydrocarbon group having 10 to 26 carbon atoms and a counter anion being an alkylsulfuric acid ester ion having 1 to 2 carbon atoms and metaxylenesulfonic acid or a salt thereof (B) And a rheology modifier added such that the sum of (A1) and (B) is 0.01 to less than 0.97% by weight in the effective component concentration in the aqueous phase. A rheology modifier comprising a quaternary ammonium salt (A) having at least one hydrocarbon group having 10 to 26 carbon atoms and styrene sulfonic acid or a salt thereof (C). The manufacturing method of a slurry which adds the rheology modifier of any one of Claims 1-3 to the slurry containing powder. The manufacturing method of the slurry of Claim 4 which adds a rheology modifier to a slurry on the conditions chosen from following (1)-(3).
(1): The sum of (A) and (B) is an effective component concentration in the aqueous phase of the slurry of 0.01 to less than 0.3% by weight, and the molar ratio (B) / (A) is 0.5 to Add to the slurry to be less than 1.5.
(2): It is added to the slurry so that the total of (A1) and (B) is 0.01 to 0.97% by weight as the effective component concentration in the aqueous phase of the slurry.
(3): It is added to the slurry so that the sum of (A) and (C) is 0.01 to less than 20% by weight in the effective concentration in the aqueous phase of the slurry.