JP2009161607A - One-component liquid rheology modifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a one-component liquid rheology modifier in a liquid one-component state having a viscosity with easily handling property of itself and capable of keeping a modifying effect such as a thickening effect when added to a slurry or the like. <P>SOLUTION: The one-component liquid rheology modifier contains a compound (A) and a compound (B) selected from a group consisting of combinations (1) of a compound (A) selected from cationic surfactants and a compound (B) selected from anionic aromatic compounds and combinations (2) of a compound (A) selected from cationic surfactants and a compound (B) selected from bromide compounds, and a water-soluble organic compound (C). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a one-component liquid rheology modifier.

  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. A technique has been used, such as controlling the amount of surplus water by adding water, and a technique of adding a water-soluble polymer compound to a slurry system and utilizing a thickening action due to polymer entanglement.

Furthermore, when the slurry is produced, sufficient viscosity is obtained by short-time kneading, and further, the material separation resistance is stable, and the property or composition is stable even when the water powder ratio is high or in contact with the aqueous phase. There is a combination of the compound (A) and the compound (B) selected from (1) a cationic surfactant for the purpose of obtaining a slurry having no setting delay and excellent cured properties for a hydraulic powder. A combination of the compound (B) selected from the compound (A) and the anionic aromatic compound, (2) a combination of the compound (A) selected from the cationic surfactant and a compound (B) selected from the bromide compound, A slurry rheology modifier having a combination selected from the following has been developed (Patent Document 1). Further, a rheology modifier containing a specific quaternary salt type cationic surfactant, a compound selected from an anionic aromatic compound and an inorganic bromine salt, and an alcohol having a specific solubility parameter has been developed. (Patent Document 2).
JP 2003-313536 A JP 2004-211078

  However, these rheology modifiers are those in which two compounds are mixed in a slurry at the time of use to develop a rheology modification effect, and there is no mention of a liquid one-component form. From the viewpoint of workability such as measurement and addition operation, a rheology modifier having a liquid and one agent form is desirable. However, even if an aqueous solution containing the two compounds described in the above document is simply prepared, the viscosity is remarkably increased. It will not be easy to handle. Although it is conceivable to reduce the viscosity of such a thickened aqueous solution by using other components, no improvement in handling property has been found and no re-thickening at the time of use has been found.

  An object of the present invention is to improve a liquid one-component liquid rheology which is a liquid and one-agent type, which itself has a relatively low viscosity with good handleability and can exert a thickening effect when added to a slurry or the like. It is to provide a quality agent.

The present invention relates to a first water-soluble low-molecular compound (hereinafter referred to as compound (A)), a second water-soluble low-molecular compound (hereinafter referred to as compound (B)) different from compound (A), and solubility. A one-component liquid rheology modifier containing a water-soluble organic compound (C) having a parameter of 18.6 to 29.8 [(MPa) ^1/2 ] (hereinafter referred to as a water-soluble organic compound (C)). A combination of compound (A) and compound (B) is (1) a combination of compound (A) selected from cationic surfactants and a compound (B) selected from anionic aromatic compounds, (2) The present invention relates to a one-component liquid rheology modifier selected from the group consisting of a compound (A) selected from cationic surfactants and a combination of compounds (B) selected from bromide compounds.

  The present invention also relates to a slurry containing powder, water and the one-component liquid rheology modifier of the present invention.

  According to the present invention, a liquid one-component liquid rheology modifier is provided in the form of one agent, and workability such as measurement and addition operation is improved.

  The one-component liquid rheology modifier of the present invention has a low viscosity while being in the form of one solution. For example, when the rheology modifier is added to an aqueous solution, it is added to water or slurry. In addition, the viscosity of the mixture becomes high.

  A first water-soluble low-molecular compound (hereinafter referred to as compound (A)) used in the one-component liquid rheology modifier of the present invention and a second water-soluble low-molecular compound (hereinafter referred to as compound (A)) different from compound (A). Compound (B)) forms an aggregate structure such as string-like micelles in the composition of the rheology modification target, and exhibits a rheology modification effect by the formation of the structure.

  The one-component liquid rheology modifier of the present invention contains a compound (A), a compound (B), and a water-soluble organic compound (C).

  The water-soluble organic compound (C) used in the one-component liquid rheology modifier of the present invention contains the compounds (A) and (B) in a solution having a high concentration of the compound (A) and the compound (B) and a small amount of water. ) And the viscosity increase by the compounds (A) and (B) is inhibited. As a result, the one-component liquid rheology modifier before dilution is considered to have a low viscosity. It is done. When diluted with a solution (aqueous solution) containing water, the water-soluble organic compound (C) moves from the aggregate structure of the compounds (A) and (B) into the aqueous solvent, and as a result, one diluted solution The type liquid rheology modifier is considered to develop a high viscosity by the structure formation of the compounds (A) and (B).

  Although the reason why the one-pack type liquid rheology modifier of the present invention changes the state of viscosity development depending on the presence or absence of dilution with an aqueous solvent is unknown, it is used to distribute water and aggregate structures of the water-soluble organic compound (C). It is thought to have influenced.

  It is preferable that the compound (A) and the compound (B) form an aggregate structure in the diluted aqueous solution, and the aggregate structure is preferably a string-like micelle. The presence of the aggregate structure can be confirmed by flow birefringence or dynamic viscoelasticity measurement using a polarizing plate.

  In Patent Documents 1 and 2, etc., it is said that a string-like micelle or an aggregate is formed, but in the combination of an anionic compound and a cationic compound used in them, the handling property is improved while being used. A method that can maintain the reforming effect such as the re-thickening effect has not been found. In the present invention, by using a water-soluble organic compound, the viscosity of the composition (aqueous solution or the like) containing the two compounds (A) and (B) itself is reduced and mixed with water or powder. Coexistence with the thickening effect at the time became possible.

  The combination of the compound (A) and the compound (B) only needs to form an aggregate structure such as string micelles, and the aqueous solution of the compound (A) having a viscosity of 100 mPa · s or less and the viscosity of the compound (B) is 100 mPa. When mixed with an aqueous solution of s or less, it is preferable that the viscosity of the aqueous solution is at least twice as high as that of any aqueous solution before mixing. More preferably, it can be at least 5 times, more preferably at least 10 times, even more preferably at least 100 times, and even more preferably at least 500 times higher. Here, the viscosity was measured with a B-type viscometer (C rotor [No. 3 rotor in the case of No. notation], 1.5 to 12 rpm) at 20 ° C. Say. In this case, the viscosity behavior is 1.5 r. p. m. To 12r. p. m. It may be expressed at any of the rotation speeds. Moreover, mixing mixes each aqueous solution by 50/50 weight ratio. The concentration of the aqueous solution of the compound (A) and the aqueous solution of the compound (B) is preferably 0.01 to 50% by weight.

  Here, the water-soluble low-molecular compound is a compound that does not cause phase separation with water in a state in which a structure such as a single molecule, an aggregate, a micelle, or a liquid crystal is formed in water or a mixture thereof at room temperature. It is. A phase has a macro size and is a region where statistical physical quantities such as temperature and pressure are clearly defined (colloid chemistry, volume 1, first edition, pages 89 to 90, October 12, 1995). Published by Tokyo Chemical Doujin). The water-soluble low molecular weight compound preferably has a solubility of 0.001 mg or more at 25 ° C. with respect to 100 g of water. Moreover, it is preferable to have a molecular weight of 2000 or less.

  A quaternary salt type cationic surfactant is preferred as the one selected from the cationic surfactants, and the quaternary salt type cationic surfactant is a saturated compound containing 10 to 26 carbon atoms in the structure. Alternatively, those having at least one unsaturated linear or branched alkyl group are preferred. For example, alkyl (10 to 26 carbon atoms) trimethylammonium salt, alkyl (10 to 26 carbon atoms) pyridinium salt, alkyl (10 to 26 carbon atoms) imidazolinium salt, alkyl (10 to 26 carbon atoms) dimethylbenzylammonium salt Specifically, hexadecyltrimethylammonium chloride, hexadecyltrimethylammonium bromide, octadecyltrimethylammonium chloride, octadecyltrimethylammonium bromide, tallow trimethylammonium chloride, tallow trimethylammonium bromide, hydrogenated tallow trimethylammonium chloride, hydrogen Tallow trimethylammonium bromide, hexadecylethyldimethylammonium chloride, octadecylethyldimethyl Examples include ruammonium chloride, hexadecylpropyldimethylammonium chloride, hexadecylpyridinium chloride, 1,1-dimethyl-2-hexadecylimidazolinium chloride, hexadecyldimethylbenzylammonium chloride and the like. Also good. Specifically, from the viewpoint of water solubility and thickening effect, hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, hexadecylpyridinium chloride and the like are preferable. Further, from the viewpoint of temperature stability of the thickening effect, it is preferable to use two or more types of cationic surfactants having different alkyl group carbon numbers as the compound (A).

  Further, when the one-component liquid rheology modifier of the present invention is applied to concrete or the like, a quaternary ammonium salt that does not contain halogen such as chlorine is used from the viewpoint of preventing corrosion of the reinforcing steel and deterioration of the concrete due to salt damage. preferable.

  Examples of quaternary salts that do not contain halogen such as chlorine include ammonium salts and imidazolinium salts. Specific examples include hexadecyltrimethylammonium methosulfate, hexadecyldimethylethylammonium etosulphate, octadecyltrimethylammonium methosulfate, octadecyl. Dimethylethylammonium ethosulphate, tallow trimethylammonium methosulphate, tallow dimethylethylammonium ethosulphate, 1,1-dimethyl-2-hexadecylimidazolinium methosulphate, hexadecyldimethylhydroxyethylammonium acetate, octadecyldimethylhydroxyethylammonium acetate, Hexadecyldimethylhydroxyethylammonium propionate, oct Decyl dimethyl hydroxyethyl ammonium propionate, tallow dimethyl hydroxyethyl ammonium acetate, tallow dimethyl hydroxyethyl ammonium propionate, and the like. A quaternary ammonium salt containing no halogen such as chlorine can be obtained, for example, by quaternizing a tertiary amine with dimethyl sulfate or diethyl sulfate.

  Examples of those selected from anionic aromatic compounds include carboxylic acids having an aromatic ring and salts thereof, phosphonic acids and salts thereof, sulfonic acids and salts thereof, and specifically include salicylic acid, p-toluenesulfonic acid, sulfone. Salicylic acid, benzoic acid, m-sulfobenzoic acid, p-sulfobenzoic acid, 4-sulfophthalic acid, 5-sulfoisophthalic acid, p-phenolsulfonic acid, m-xylene-4-sulfonic acid, cumenesulfonic acid, methylsalicylic acid, Examples thereof include styrene sulfonic acid and chlorobenzoic acid, which may form a salt, and two or more of these may be used in combination. However, in the case of a polymer, the weight average molecular weight (for example, gel permeation chromatography method / polyethylene oxide conversion) is preferably less than 500.

  As those selected from bromide compounds, inorganic salts are preferable, and examples thereof include sodium bromide, potassium bromide, hydrogen bromide and the like.

  In the present invention, the compound (A) and the compound (B) that are likely to form an aggregate are low in viscosity even in a concentrated aqueous solution, respectively, and are effective as a one-component liquid rheology modifier in the aqueous phase. Even if the concentration is low, an excellent rheological modification effect is exhibited, which is preferable from the viewpoint of workability at the time of addition. In the present invention, thickening can be achieved with an extremely low addition amount having an effective component concentration of 10% by weight or less, and the same effect can be exhibited even in a slurry system with high ionic strength. Some systems exhibit rheological properties that cannot be obtained with the use of conventional thickeners, such that the material separation resistance when in contact with the aqueous phase is very stable. This is more useful with slurries containing hydraulic powder.

  Further, a combination in which the compound (A) is an alkyl (10 to 26 carbon atoms) trimethylammonium salt and the compound (B) is a sulfonate having an aromatic ring is more preferable, and the effective component concentration in the aqueous phase of the slurry is The effect is exhibited even at 5 wt% or less. Among these, when used in a slurry of hydraulic powder, from the viewpoint of not causing a curing delay among these, as the compound (B), toluenesulfonic acid, xylenesulfonic acid, cumenesulfonic acid, styrenesulfonic acid or a salt thereof And p-toluenesulfonic acid or a salt thereof is more preferable.

About water-soluble organic compound (C), water-soluble means that 0.01g or more melt | dissolves in 100g of 20 degreeC water. The water-soluble organic compound (C) has a solubility parameter of 18.6 to 29.8 [(MPa) ^1/2 ] and a molecular weight of 1000 or less.

  Here, as the solubility parameter, the value described from page VII / 526 of POLYMER HANDBOOK (supervised by J. BRANDRUP and E. H. IMMERGUT, published by THIRD EDITION, JOHN WILEY & SONS, 1989) is used.

When there is no description of the solubility parameter value of the water-soluble organic compound (C) in the above-mentioned POLYMER HANDBOOK, the calculation is carried out by the method described on page VII / 519. That is,
δ = ((H−R × 298.15) / V) ^1/2 [Unit: (× 2.046 (MPa) ^0.5 )]
H: Evaporation enthalpy [Unit: (× 4.186 J / mol)]
R: Gas constant [Unit: (1.98719 × 4.186 J / K · mol)]
V: Value calculated in terms of mol volume (cm ³ / mol).
H is
H = -2950 + 23.7Tb + 0.020Tb ² [Unit: (× 4.186 J / mol)]
Tb: Standard boiling point [unit: K] It is obtained from the standard boiling point Tb by the formula. The standard boiling point Tb of the water-soluble organic compound (c) is the value described in the Aldrich (2000-2001: JAPAN) reagent catalog. If the boiling point is described under reduced pressure, use the pressure-temperature calculation table in the attached table of the same book. Determine the boiling point at normal pressure. In addition, for the water-soluble organic compound (c) not described in the same book and the water-soluble organic compound (c) not described in the boiling point, the solubility parameter δ at 25 ° C. is obtained by the following formula using the Group Contribution method.
δ = ΣFi / V
F: Molar suction constant [Unit: (× 2.046 (MPa) ^0.5 cm ³ / mol)]
Note that F uses the molar suction constant of Hoy.

  Examples of the water-soluble organic compound (C) include alcohol compounds such as methanol, ethanol, propanol, butanol, and benzyl alcohol, propylene glycol, dipropylene glycol, polypropylene glycol, propylene glycol monoalkyl (1 to 4 carbon atoms) ether, di Glycol compounds such as propylene glycol monoalkyl (carbon number 1-4) ether, ethylene glycol monoalkyl ether, diethylene glycol monoalkyl (carbon number 1-4) ether, amine compounds such as benzylamine, ethyl lactate, butyl lactate, etc. Ester compounds, and the like. As the water-soluble organic compound (C), the composition (aqueous solution) containing the two compounds (A) and (B) itself has a reduced viscosity, and increased when mixed with water or powder. From the viewpoint of coexistence with the viscous effect, butanol, benzyl alcohol, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, ethyl lactate, and butyl lactate are preferable.

The one-component liquid rheology modifier of the present invention is preferably one in which rewinding is observed in the solution when stirring is stopped in the following standard test (I). The term “rewinding” as used herein means that the aggregates in the solution are entangled and have elastic properties, and the bubbles entrained in the solution move in the direction opposite to the rotation direction when stirring is stopped. Say. It is presumed that an association structure such as a string-like micelle is formed by the compound (A) and the compound (B) in the mixed solution of the potassium hydroxide aqueous solution and the one-component liquid rheology modifier due to the occurrence of rewinding. .
Standard test (I): To a 200 mL beaker, add 95 mL of 0.1N potassium hydroxide aqueous solution and 10 mL of one-component liquid rheology modifier, and stir for 180 seconds at 4 rpm with a 6 mm diameter glass rod.

  In the standard test (I), the glass rod with stirring is put to the bottom, and the rotation is performed along the wall surface. Visual observation is performed after the stirring is stopped, and if the movement of the bubble is observed in the direction opposite to the rotation direction, it is determined that the bubble has been unwound.

  In the one-component liquid rheology modifier according to the present invention, other components such as a dispersant, an AE agent, a retarder, an early strengthener, an accelerator, and a foaming agent are provided as long as the performance of the modifier is not affected , Foaming agents, antifoaming agents, rust inhibitors, colorants, antifungal agents, crack reducing agents, swelling agents, dyes, pigments and the like.

  In the one-component liquid rheology modifier of the present invention, the molar ratio (effective molar ratio) of the compound (A) and the compound (B) is increased depending on the combination of the compound (A) and the compound (B). The high region is different and may be appropriately determined according to the target degree of thickening. From the viewpoint of the obtained viscosity and the shape of the aggregate, compound (A) / compound (B) = 1 / 20-20 / 1 The ratio is preferably 1/20 to 4/1, more preferably 1/3 to 2/1, and still more preferably 1/1 to 2/3.

  The content of the compound (A) in the one-component liquid rheology modifier is preferably less than the concentration causing precipitation, and from the viewpoint of reducing the viscosity of the one-component liquid rheology modifier, the one-component type 2.5-40 weight% is preferable in a liquid rheology modifier, 5-30 weight% is more preferable, and 10-20 weight% is still more preferable.

  The content of the compound (B) in the one-component liquid rheology modifier is preferably less than the concentration causing precipitation, and from the viewpoint of reducing the viscosity of the one-component liquid rheology modifier, the one-component type 1.5-30 weight% is preferable in a liquid rheology modifier, 3-20 weight% is more preferable, and 5-15 weight% is still more preferable.

  The content of the water-soluble organic compound (C) in the one-component liquid rheology modifier is preferably less than the concentration causing precipitation, from the viewpoint of lowering the viscosity of the one-component liquid rheology modifier. 0.1-50 weight% is preferable in a 1 liquid type liquid rheology modifier, 0.1-20 weight% is more preferable, and 3-10 weight% is still more preferable. The content of the water-soluble organic compound (C) is preferably determined in consideration of the viscosity of the one-component liquid rheology modifier described later, and the viscosity at 20 ° C. is 5000 mPa · s or less, and further 2500 mPa · s or less. It is preferable to use in such an amount.

  The weight ratio of the water-soluble organic compound (C) and the total of the compound (A) and the compound (B) in the one-component liquid rheology modifier of the present invention is two compounds (A) and (B). (C) / [(A) + (B ]] = 0.1 / 100 to 1000/100, more preferably 1/100 to 500/100, and further preferably 10/100 to 100/100.

  The one-component liquid rheology modifier of the present invention is liquid and is preferably an aqueous solution. From the viewpoint of being liquid, the content of water in the one-component liquid rheology modifier is preferably 50% by weight or more, more preferably 50 to 80% by weight, and still more preferably 60 to 70% by weight. . The total content of the compound (A), the compound (B), and the water-soluble organic compound (C) is preferably 50% by weight or less in the one-component liquid rheology modifier, % By weight is more preferable, and 40 to 25% by weight is still more preferable. From the viewpoint of making the addition amount to the rheology modification target uniform, none of the compound (A), the compound (B) and the water-soluble organic compound (C) is precipitated in the one-component liquid rheology modifier. It is preferable.

  In addition, the viscosity of the one-component liquid rheology modifier of the present invention is preferably 10,000 mPa · s or less, more preferably 5000 mPa · s or less, and more preferably 3000 mPa · s or less and 2000 mPa · s or less at 20 ° C. from the viewpoint of workability. More preferred.

  Furthermore, since the one-component liquid rheology modifier of the present invention can impart good rheological properties even in a slurry system with high ionic strength, the electric conductivity of the aqueous phase is in the range of 0.01 to 80 mS / cm, preferably It is preferable to use it for a slurry of 0.1 to 60 mS / cm, more preferably 1 to 40 mS / cm. Especially, it is preferable to apply to the slurry system with high electrical conductivity of the water phase containing hydraulic compositions, such as cement.

  According to the present invention, the slurry containing the one-component liquid rheology modifier of the present invention, in particular, the one-component liquid rheology modifier of the present invention, a hydraulic powder, and water. A slurry can be obtained.

  The one-component liquid rheology modifier of the present invention can be preferably applied to a slurry having a water powder ratio of 30 to 600%, more preferably a slurry having a water powder ratio of 30 to 300%. As the powder for producing this slurry, 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 powders other than the above, such as titanium oxide.

  Further, in the one-component liquid rheology modifier of the present invention, the effective component concentration in the slurry may be appropriately determined according to the target degree of thickening, but the one-component liquid rheology modifier of the present invention. A slurry containing the one-component liquid rheology modifier of the present invention can be obtained by a method such as adding the agent to a slurry prepared in advance or adding the agent during slurry production. (1) Combination of compound (A) selected from cationic surfactant and compound (B) selected from anionic aromatic compound, (2) Compound (A) selected from cationic surfactant and bromide When selected from the combination of the compounds (B) selected from the compounds, the total effective amount of the compound (A) and the compound (B) is 0.01 to the effective component concentration in the aqueous phase of the slurry. It is preferable to use 20% by weight, further 0.1 to 15% by weight, further 0.1 to 10% by weight, and further 0.3 to 10% by weight.

  From the viewpoint of the rheology modification effect, the viscosity of the slurry containing the one-component liquid rheology modifier of the present invention, in particular, the hydraulic slurry containing the hydraulic powder is preferably 1000 mPa · s or more at 20 ° C. 2000 mPa · s or more is more preferable.

  The hydraulic slurry containing the one-component liquid rheology modifier of the present invention may contain a dispersant. Dispersants include lignin sulfonate and its derivatives as water reducing agents, oxycarboxylates, polyol derivatives, high-performance water reducing agents and high-performance AE water reducing agents such as naphthalene (manufactured by Kao Corporation: Mighty 150), melamine (Kao Co., Ltd .: Mighty 150V-2), polycarboxylic acid type (Kao Co., Ltd .: Mighty 3000, NMB Co., Ltd .: Leo Build SP, Nippon Shokubai Co., Ltd .: Aqualock FC600, Aqualock FC900), anion interface Examples of the activator include polycarboxylic acid type surfactants (manufactured by Kao Corporation: Poise Series). Among them, the polycarboxylic acid-based high-performance water reducing agent and the polycarboxylic acid type surfactant are preferable in the sense that both the fluidity and viscosity of the slurry can be achieved.

  The content of the dispersant in the hydraulic slurry containing the one-component liquid rheology modifier of the present invention is generally 0.01 to 5% by weight, more preferably 0.05 to 3% as an active ingredient with respect to the hydraulic powder. % By weight is preferred.

  In the one-component liquid rheology modifier of the present invention, in addition to the compound (A), the compound (B), and the water-soluble organic compound (C) according to the present invention, other existing water-soluble compounds can be used from the viewpoint of viscosity adjustment. Can be used. Examples of other existing water-soluble polymers include cellulose derivatives, polyacrylic polymers, polyethylene glycol, polyvinyl alcohol, gum polysaccharides, microbial fermentation polysaccharides, xanthan gum, cationic polymers, and the like. Is preferred.

As the cationic polymer, those containing cationic nitrogen are preferable, and polyoxygen containing an alkyl group having 1 to 22 carbon atoms and an oxyalkylene group having 2 to 8 carbon atoms in the cationic nitrogen of the cationic polymer. Those having a group selected from an alkylene group, a hydrogen atom and an acryloyloxyalkyl group are preferable. Specific examples of the cationic polymer include polyallyltrialkylammonium salts such as polyallyltrimethylammonium salt, poly (diallyldimethylammonium salt), poly (methacryloyloxyethyldimethylethylammonium salt), polymethacrylamideamidopropyltrimethylammonium salt, Examples thereof include cationized starch, cationized cellulose, and cationized hydroxyethyl cellulose. Among these, poly (diallyldimethylammonium salt), polymethacryloyloxyethyldimethylethylammonium salt, polymethacrylamidopropyltrimethylammonium salt, methacryloyloxyethyldimethylethylammonium salt-vinylpyrrolidone copolymer, and methacrylamidepropyltrimethylammonium salt -Cationic polymers selected from vinylpyrrolidone copolymers are preferred. In addition, from the viewpoint of the rheology modification effect, those in which the counter ion is an alkyl sulfate ion, particularly ethyl sulfate and methyl sulfate are more preferable. The molecular weight of the cationic polymer is preferably 1000 or more, and more preferably 1000 to 3 million. This molecular weight is a weight average molecular weight measured under the following conditions by gel permeation chromatography.
Column: α-M (manufactured by Tosoh Corp.) 2 linked Eluent: 0.15 mol / L Na sulfate 1% acetic acid aqueous solution Flow rate: 1.0 mL / min
Temperature: 40 ° C
Detector: RI
Pullulan is used as molecular weight standard

  The content of the cationic polymer is preferably 0.1 to 30% by weight, more preferably 1 to 20% by weight in the one-component liquid rheology modifier of the present invention. The weight ratio of the cationic surfactant to the cationic polymer is preferably cationic polymer / cationic surfactant = 1/100 to 200/100, more preferably 5/100 to 130/100.

  The hydraulic slurry containing the one-component liquid rheology modifier of the present invention has other components such as an AE agent, a retarder, an early strengthening agent, an accelerator, a foaming agent, as long as the performance of the agent is not impaired. It may contain a foaming agent, an antifoaming agent, a crack reducing agent, an expanding agent and the like.

  A cured composition obtained by curing a slurry containing the one-component liquid rheology modifier and hydraulic powder of the present invention is excellent in initial cured physical properties as compared with the case of using a water-soluble polymer. Furthermore, an aggregate can be mixed with the hydraulic slurry containing the one-component liquid rheology modifier of the present invention to prepare a hydraulic composition. A cured composition obtained by curing this hydraulic composition is excellent in initial cured physical properties as compared with the case of using a water-soluble polymer, and is suitably used for a structure or the like.

  The aggregate mixed with the hydraulic slurry containing the one-component liquid rheology modifier of the present invention can be a fine aggregate or a coarse aggregate, and is not limited, but has a low water absorption rate and is not limited. A thing with high intensity | strength is preferable. Coarse aggregates include rivers, land, mountains, sea, lime gravel, crushed stones, blast furnace slag coarse aggregate, ferronickel slag coarse aggregate, lightweight coarse aggregate (artificial and natural) and recycled coarse aggregate Can be mentioned. Fine aggregates include rivers, land, mountains, sea, lime sand, quartz sand and crushed sand, blast furnace slag fine aggregates, ferronickel slag fine aggregates, lightweight fine aggregates (artificial and natural) and recycled fine aggregates. Etc.

  The slurry containing the one-component liquid rheology modifier of the present invention can contain hydraulic powder, and the slurry containing the one-component liquid rheology modifier can hydrate the hydraulic powder. It cures without hindering the reaction. From this point, it can be suitably used for civil engineering and architectural applications.

<Example 1>
(1) Preparation of 1-component liquid rheology modifier and measurement of viscosity and reversal A liquid 1-component liquid rheology modifier was prepared with the composition shown in Table 1. The temperature was adjusted to 20 ° C. in a constant temperature water bath, and the viscosity was measured with a B-type viscometer (No. 3 rotor, 12 rpm). Moreover, the rewinding was observed by the method of the standard test (I). The results are shown in Table 2.

  The viscosity at 20 ° C. of a 0.8% by weight aqueous solution of sodium p-toluenesulfonate (B-type viscometer (No. 3 rotor, 12 rpm)) is 100 mPa · s or less, hexadecyltrimethylammonium chloride / octadecyltrimethyl The viscosity at 20 ° C. of a 1.3 wt% aqueous solution of an ammonium chloride mixture (weight ratio 1/1) was 100 mPa · s or less. When these aqueous solutions were mixed at a weight ratio of 50/50, the viscosity of the aqueous solution was 1100 mPa · s.

(2) Rheological modification evaluation of hydraulic slurry After mixing 400 g of ordinary Portland cement and 376 g of water with a hand mixer for cake for 30 seconds, 24 g of the one-component liquid rheology modifier shown in Table 1 was added and further mixed for 60 seconds. The viscosity of the prepared slurry was measured with a bisco tester (VT-04E manufactured by Rion). The temperature of the material was adjusted so that the slurry temperature was 35 ° C. The results are shown in Table 2.

  In Table 1, 0.1 g or more of compounds other than heptane are dissolved in 100 g of water at 20 ° C. Heptane has a dissolution amount of 100 g of water at 20 ° C. of less than 0.1 g, but is described in the column of the water-soluble organic compound (C) for convenience.

Claims (5)

A first water-soluble low-molecular compound (hereinafter referred to as compound (A)), a second water-soluble low-molecular compound (hereinafter referred to as compound (B)) different from compound (A), and a solubility parameter of 18. 6 to 29.8 [(MPa) ^1/2 ] water-soluble organic compound (C), a one-component liquid rheology modifier, the combination of compound (A) and compound (B), (1) Combination of compound (A) selected from cationic surfactants and compound (B) selected from anionic aromatic compounds, (2) Compound (A) and bromide compounds selected from cationic surfactants A one-component liquid rheology modifier selected from the group consisting of a combination of compounds (B) selected from: The one-component liquid rheology modifier according to claim 1, wherein the water-soluble organic compound (C) is at least one selected from the group consisting of alcohol compounds, glycol compounds, amine compounds and ester compounds. The one-component liquid rheology modifier according to claim 1 or 2, wherein the content of the water-soluble organic compound (C) is 0.1 to 50% by weight in the one-component liquid rheology modifier. A slurry containing powder, water, and the one-component liquid rheology modifier according to any one of claims 1 to 3. The slurry according to claim 4, wherein the powder is a hydraulic powder.