JP6339818B2 - Additive for hydraulic composition - Google Patents

Description

The present invention relates to an additive for hydraulic compositions. More specifically, the present invention relates to a cement additive that can be used together with a cement dispersant for a cement composition such as cement paste, mortar, and concrete.

Cement dispersants for dispersing cement are widely used as water reducing agents for cement compositions such as cement paste, mortar, concrete, etc., in order to construct civil engineering and building structures from cement compositions. It is indispensable. A cement dispersant such as a water reducing agent has an effect of improving the strength, durability, and the like of the cured product by increasing the fluidity of the cement composition and reducing the water content of the cement composition. Among the water reducing agents, those containing a polycarboxylic acid-based polymer exhibit high water reducing performance as compared with conventional water reducing agents such as naphthalene, and thus have many achievements as high performance AE water reducing agents.

In recent years, with the depletion of high-quality fine aggregates such as river sand, the proportion of aggregates that have not been actively used is increasing. Hydraulic compositions using such fine aggregates tend to have a high fresh state viscosity, low fluidity, and low workability even at a normal water cement ratio (W / C). is there. It is difficult to cope with this problem with a conventional polycarboxylic acid polymer.

Under such circumstances, Patent Document 1 discloses that when a low-quality aggregate containing a lubricating clay (for example, smectite, montmorillonite, etc.) is used, an inorganic cation (for example, calcium nitrate), an organic cation (for example, tetrabromide bromide). It is disclosed that the effectiveness of a polycarboxylic acid-based water reducing agent can be improved by using a polycarboxylic acid-based water reducing agent in combination with a polar organic molecule (for example, polyethylene glycol, sodium hexametaphosphate, etc.).

Further, in Patent Document 2, when an aggregate having a low quality is used, a cationic polymer (for example, poly-diallyldimethylammonium chloride) containing a quaternary ammonium group is used in combination with a polycarboxylic acid-based water reducing agent. It is disclosed that the fresh state is improved. Furthermore, in Patent Document 3, when using a clay-containing aggregate, the above-mentioned cationic polymer and oxycarboxylate (for example, sodium gluconate) are used in combination with a polycarboxylic acid-based water reducing agent. It is disclosed that the volumetric efficiency of the carboxylic acid water reducing agent can be improved.

Japanese Patent No. 4491078 Japanese Patent No. 4389233 JP 2011-136844 A

As mentioned above, when using aggregates containing fine particles such as clay, it is effective to use polycarboxylic acid-based water reducing agents by using organic cations and cationic polymers together with polycarboxylic acid-based water reducing agents. It is possible to improve the sex. This is thought to be because the polycarboxylic acid-based water reducing agent can be effectively adsorbed to the cement component by adsorbing the organic cation or cationic polymer to the fine particle component. However, Patent Document 1 describes the use of a polyquaternary amine as an organic cation, but does not specifically show the effect of using a polymer. Further, in Patent Documents 2 and 3, it has been found that when a cationic polymer is used when the amount of the fine particle component contained in the aggregate is small, there is a problem that the fluidity is lowered. Therefore, it is necessary to adjust the amount of the cationic polymer depending on the content of the fine particle component.

The present invention has been made in view of the above-described situation, and for a hydraulic composition containing an aggregate of not high quality, regardless of the content of fine components, the state of fluidity, retainability, concrete, etc. An object of the present invention is to provide an additive for a hydraulic composition that can improve properties and give excellent properties to a hydraulic composition such as concrete.

The inventors of the present invention have studied various additives for hydraulic compositions that are excellent in fluidity and retainability with respect to hydraulic compositions containing fine particle components. As a result, vinyl monomers having cationic groups and cationic groups have been obtained. When an additive for a hydraulic composition containing a specific cationic polymer having a structure derived from a vinyl-based monomer having no water content is used, the flowability is increased regardless of the amount of fine particle components contained in the hydraulic composition. The inventors have found that it is possible to improve retainability and the state of concrete and the like, and to give excellent properties to a hydraulic composition such as concrete, and have reached the present invention.

［一般式（１）中、Ｒ^１〜Ｒ^３は、同一でも異なっていてもよく、それぞれ炭素数１〜１８のアルキル基若しくはヒドロキシアルキル基、炭素数６〜１８のアリール基、又は、式：Ｚ−（ＯＡ）_ｎ−（ＯＡは炭素数２〜１８のオキシアルキレン基、ｎはオキシアルキレン基の平均付加モル数を表し、１〜５０の整数、Ｚは水素原子、炭素数１〜１８のアルキル基、炭素数６〜１８のアリール基、又は、炭素数１〜１８のアシル基）で表される基を表す。］
以下に本発明を詳述する。
なお、以下において記載する本発明の個々の好ましい形態を２つ以上組み合わせたものもまた、本発明の好ましい形態である。 That is, this invention is an additive for hydraulic compositions characterized by containing the cationic polymer (A) satisfying the following (i) to (iii).
(I) It has a structure derived from a vinyl monomer (a) having a cationic group and a vinyl monomer (b) having no cationic group.
(Ii) The molar ratio of the monomer (a) to the monomer (b) is (a) / (b) = 1/99 to 95/5.
(Iii) The monomer (a) includes a vinyl monomer having a quaternary nitrogen cation group represented by the following general formula (1).

[In General Formula (1), R ^{1 to} R ³ may be the same or different, and are each an alkyl group or hydroxyalkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms, or a formula: Z- (OA) _n- (OA is an oxyalkylene group having 2 to 18 carbon atoms, n is an average added mole number of the oxyalkylene group, an integer of 1 to 50, Z is a hydrogen atom, and has 1 to 18 carbon atoms An alkyl group, an aryl group having 6 to 18 carbon atoms, or an acyl group having 1 to 18 carbon atoms). ]
The present invention is described in detail below.
A combination of two or more preferred embodiments of the present invention described below is also a preferred embodiment of the present invention.

When a dispersing agent for hydraulic powder such as a water reducing agent is used for a hydraulic composition, the dispersing agent for hydraulic powder adsorbs to the hydraulic powder such as cement, so that the fluidity of the hydraulic composition is reduced. Can be increased. However, if fine components such as clay are contained in the hydraulic composition, the dispersant is also adsorbed to the fine components, and the amount of the dispersant adsorbed on the hydraulic powder is reduced. The fluidity of the hard composition cannot be sufficiently increased.
For this reason, in Patent Documents 2 and 3, it is considered that the cationic polymer is adsorbed on the fine particle component and the dispersant is prevented from adsorbing on the fine particle component by using the cationic polymer together with the dispersant. However, as described above, when the amount of the fine particle component contained in the hydraulic composition is small, the fluidity may be deteriorated. This is because the cationic polymers described in Patent Documents 2 and 3 are adsorbed not only on the fine particle component but also on the hydraulic powder, so that the dispersant is inhibited from adsorbing on the hydraulic powder. It is thought that there is not.
In the additive for hydraulic composition of the present invention, a cationic property having a structure derived from a vinyl monomer (a) having a cationic group and a structure derived from a vinyl monomer (b) having no cationic group The polymer (A) has a structure that is easy to be adsorbed to fine particle components such as clay but difficult to adsorb to hydraulic powder such as cement. The cationic polymer (A) having such a structure allows the dispersant to be effectively adsorbed to the hydraulic powder regardless of the amount of the fine particle component contained in the hydraulic composition. The fluidity of the composition can be increased. Furthermore, in the hydraulic composition additive of the present invention, workability can be improved because there is no need to adjust the amount of the cationic polymer (A) depending on the amount of the fine particle component contained in the hydraulic composition. it can.

The cationic polymer (A) has a structure derived from a vinyl monomer (a) having a cationic group and a vinyl monomer (b) having no cationic group.
The “structure derived from a vinyl monomer” is a structure in which a polymerizable double bond of a vinyl monomer is opened by a polymerization reaction (a double bond (C═C) is a single bond (—C -C-)). The said structure should just become a structure derived from the said monomer (a) and the said monomer (b) in a polymer, and the said monomer (a) and the said monomer (b) are The monomer (b) may be polymerized to form a structure derived from the monomer (b), and a part of the monomer (a) may be formed into the monomer (a). It may be a derived structure.

Examples of the counter anion (also referred to as counter ion) of the cationic polymer (A) include anionic ions such as halide ions, sulfate ions, nitrate ions, perchlorate ions, phosphate ions, alkyl sulfate ions, and organic acid ions. Is mentioned.
Examples of the halide ions include chloride ions and bromide ions. Examples of the alkyl sulfate ion include methyl sulfate ion and ethyl sulfate ion. Examples of organic acid ions include acetate ions, p-toluenesulfonate ions, oxalate ions, and the like.
In the additive for hydraulic compositions of the present invention, the counter ion is preferably other than halide ions when a large amount of the additive of the present invention is used from the viewpoint of preventing corrosion of reinforcing bars.

In the cationic polymer (A), the monomer (a) includes a vinyl monomer having a quaternary nitrogen cation group represented by the general formula (1).

As long as the monomer (a) includes a vinyl monomer having a quaternary nitrogen cation group represented by the general formula (1), the monomer (a) may include a vinyl monomer having another cation group. Good. In addition, the monomer (a) is a vinyl monomer having a cation group which is substantially only a vinyl monomer having a quaternary nitrogen cation group represented by the general formula (1). It is more preferable that it contains.

In the cationic polymer (A), the monomer (a) may be one type or two or more types.
The monomer (a) preferably does not have a functional group that exhibits anionicity under alkaline conditions from the viewpoint of suppressing adsorption to a hydraulic powder such as cement, and includes a carboxyl group, a sulfone group, and a phosphorus group. More preferably, it does not have an acid group.

［一般式（ａ−１）中、Ｒ^ａ１及びＲ^ａ２は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。また、＊印で示す部位に上記一般式（１）で表される第４級窒素カチオン基が直接的に結合するか、又は、有機基を介して結合する。］

［一般式（ａ−２）中、Ｒ^ａ３及びＲ^ａ４は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。Ｒ^ａ５は、炭素数１〜６のアルキレン基又は直接結合を表す。また、＊印で示す部位に上記一般式（１）で表される第４級窒素カチオン基が直接的に結合するか、又は、有機基を介して結合する。］ The monomer (a) includes a monomer represented by the following general formula (a-1), a monomer represented by the following general formula (a-2), and an acrylamide monomer. It is preferably at least one selected from the group.

[In General Formula (a-1), R ^a1 and R ^a2 may be the same or different and each represents a hydrogen atom or a methyl group. Further, the quaternary nitrogen cation group represented by the general formula (1) is directly bonded to the site indicated by *, or is bonded through an organic group. ]

[In General Formula (a-2), R ^a3 and R ^a4 may be the same or different and each represents a hydrogen atom or a methyl group. R ^a5 represents an alkylene group having 1 to 6 carbon atoms or a direct bond. Further, the quaternary nitrogen cation group represented by the general formula (1) is directly bonded to the site indicated by *, or is bonded through an organic group. ]

In the general formula (a-2), examples of the alkylene group R ^a5 include a methylene group, an ethylene group, a trimethylene group, a methylethylene group, an ethylethylene group, a tetramethylene group, and a 1,2-dimethylethylene group. It is done. “R ^a5 is a direct bond” means that there is no site represented by R ^a5 and a structure in which an oxygen atom is directly bonded to a carbon atom.

［一般式（ａ−３）中、Ｒ^ａ６及びＲ^ａ７は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。＊印で示す少なくとも一方の部位に上記一般式（１）で表される第４級窒素カチオン基が直接的に結合するか、又は、有機基を介して結合する。］ As the acrylamide monomer, a monomer represented by the following general formula (a-3) is preferable.

[In General Formula (a-3), R ^a6 and R ^a7 may be the same or different and each represents a hydrogen atom or a methyl group. The quaternary nitrogen cation group represented by the general formula (1) is directly bonded to at least one site indicated by *, or is bonded through an organic group. ]

In the general formula (a-3), when the quaternary nitrogen cation group represented by the general formula (1) is bonded to only one site indicated by *, the structure of the other site indicated by * is Although it does not specifically limit, For example, a hydrogen atom, a hydroxyl group, a C1-C18 alkyl group or a hydroxyalkyl group, or a C6-C18 aryl group etc. are mentioned.

In the general formulas (a-1) to (a-3), when the quaternary nitrogen cation group represented by the general formula (1) is bonded to the portion indicated by * through an organic group, the organic group Examples thereof include an alkylene group and an oxyalkylene group, and an ethylene group and an oxyethylene group are preferable, respectively.
Thus, it is preferable that the monomer (a) includes a (poly) alkylene glycol chain represented by (RO) _n . Here, RO represents an oxyalkylene group having 2 to 18 carbon atoms, and may be the same or different. Moreover, n represents the average addition mole number of an oxyalkylene group, and is a number of 1-500.

2-8 are preferable and, as for carbon number of R in the said oxyalkylene group RO, 2-4 are more preferable. Further, any two or more alkylene oxide adducts selected from ethylene oxide, propylene oxide, butylene oxide, styrene oxide and the like can be used in any of random addition, block addition, alternating addition, and the like. In order to secure a balance between hydrophilicity and hydrophobicity, it is preferable to include an oxyethylene group as an essential component in the oxyalkylene group, more preferably 50 mol% or more is an oxyethylene group, and 90 mol% or more. More preferably, it is an oxyethylene group.

The smaller the average addition mole number n of the oxyalkylene group, the lower the hydrophilicity of the resulting polymer. The larger the average addition mole number n, the lower the copolymerization reactivity. The average added mole number n is preferably 2 or more, more preferably 5 or more, still more preferably 10 or more, particularly preferably 15 or more, and most preferably 20 or more, while preferably 300 or less. Moreover, as a suitable range, 2-500, 5-500, 10-500, 15-500, 20-300 etc. are mentioned.

Preferred structural formulas of the monomer represented by the general formula (a-1) are represented by the following general formulas (a-1-1) and (a-1-2) and the general formula (a-2). A preferred structural formula of the monomer represented by the following general formula (a-2-1) is a preferred structural formula of the monomer represented by the above general formula (a-3). Shown in

In the general formulas (a-1-1), (a-1-2), (a-2-1), and (a-3-1), X ⁻ represents a counter anion. Examples of the counter anion X ⁻ include the anionic ions described above.

Moreover, the more preferable structural formula of the said monomer (a) is shown to the following general formula (a-1-3) and (a-2-2).

In the general formulas (a-1-3) and (a-2-2), n represents the average number of added moles of oxyethylene groups, and is a number of 1 to 500. The average added mole number n of the oxyethylene group is preferably 1 to 300, more preferably 1 to 200.

In the general formulas (a-1-3) and (a-2-2), X ⁻ represents a counter anion. Examples of the counter anion X ⁻ include the anionic ions described above.

As a method for producing the monomer (a), for example, the monomer (a) represented by the general formula (a-1-3) is dialkylaminoalcohol to alkylene oxide (alkylene glycol). It is produced by reacting the adduct with addition of (meth) acrylic acid or transesterifying with alkyl (meth) acrylate to obtain an esterified product and reacting the resulting esterified product with dialkylsulfuric acid. can do. Here, examples of the dialkylamino alcohol include diethylaminoethanol and the like, examples of the alkyl (meth) acrylate include methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, and the like. Examples thereof include dimethyl sulfate.

The monomer (a) represented by the general formula (a-2-2) is an haloepoxy compound obtained by adding an alkylene oxide (alkylene glycol) to an unsaturated alcohol or (meth) acrylic acid. The terminal glycidylation product can be obtained by reacting with glycidylation and the resulting glycidylation product can be reacted with an amine compound. Here, examples of the unsaturated alcohol include methallyl alcohol, allyl alcohol, and isoprenol (3-methyl-3-buten-1-ol). Examples of (meth) acrylic acid include acrylic acid and methacrylic acid. Examples of the haloepoxy compound include epichlorohydrin and the like, and examples of the amine compound include trimethylamine hydrochloride.

In the manufacturing method of the said monomer (a), what is necessary is just to adjust reaction conditions suitably so that the monomer which has the structure mentioned above may be obtained, and what is necessary is just to select suitably also when using a catalyst etc.

When the monomer (a) is produced, the counter anion can be changed to a desired anion species by an ion exchange method, for example, acetate, nitrate, perchlorate, paratoluenesulfonate. Etc. can be used.

In the cationic polymer (A), the monomer (b) may be one type or two or more types.
The monomer (b) preferably has no functional group that exhibits anionicity under alkaline conditions from the viewpoint of suppressing adsorption to hydraulic powder such as cement, and includes a carboxyl group, a sulfone group, and a phosphorus group. More preferably, it does not have an acid group. However, the monomer (b) may have a carboxyl group, a sulfone group, and a phosphoric acid group, for example, (meth) acrylic acid, or the following general formula (b-1) The combination of the monomer represented by-(b-4) and (meth) acrylic acid may be sufficient.

［一般式（ｂ−１）中、Ｒ^ｂ１及びＲ^ｂ２は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。Ｒ^ｂ３は、炭素数１〜１８のアルキル基若しくはヒドロキシアルキル基、又は、炭素数６〜１８のアリール基を表す。Ｚは、−Ｏ−又は−Ｎ（Ｙ）−（Ｙは、水素原子、ヒドロキシル基、炭素数１〜１８のアルキル基若しくはヒドロキシアルキル基、又は、炭素数６〜１８のアリール基を表す）を表す。］

［一般式（ｂ−２）中、Ｒ^ｂ４及びＲ^ｂ５は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。Ｒ^ｂ６は、水素原子、炭素数１〜１８のアルキル基若しくはヒドロキシアルキル基、又は、炭素数６〜１８のアリール基を表す。］

［一般式（ｂ−３）中、Ｒ^ｂ７及びＲ^ｂ８は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。Ｒ^ｂ９Ｏは、炭素数２〜１８のオキシアルキレン基を表し、同一でも異なっていてもよい。ｐ１は、オキシアルキレン基の平均付加モル数を表し、１〜５００の数である。Ｒ^ｂ１０は、水素原子、炭素数１〜１８のアルキル基、又は、炭素数６〜１８のアリール基を表す。］

［一般式（ｂ−４）中、Ｒ^ｂ１１及びＲ^ｂ１２は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。Ｒ^ｂ１３は、炭素数１〜６のアルキレン基又は直接結合を表す。Ｒ^ｂ１４Ｏは、炭素数２〜１８のオキシアルキレン基を表し、同一でも異なっていてもよい。ｐ２は、オキシアルキレン基の平均付加モル数を表し、１〜５００の数である。Ｒ^ｂ１５は、水素原子、炭素数１〜１８のアルキル基、又は、炭素数６〜１８のアリール基を表す。］ The monomer (b) is preferably at least one selected from the group consisting of monomers represented by the following general formulas (b-1) to (b-4).

[In General Formula (b-1), R ^b1 and R ^b2 may be the same or different and each represents a hydrogen atom or a methyl group. R ^b3 represents an alkyl group having 1 to 18 carbon atoms or a hydroxyalkyl group, or an aryl group having 6 to 18 carbon atoms. Z represents —O— or —N (Y) — (Y represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms or a hydroxyalkyl group, or an aryl group having 6 to 18 carbon atoms). Represent. ]

[In General Formula (b-2), R ^b4 and R ^b5 may be the same or different and each represents a hydrogen atom or a methyl group. R ^b6 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms or a hydroxyalkyl group, or an aryl group having 6 to 18 carbon atoms. ]

[In General Formula (b-3), R ^b7 and R ^b8 may be the same or different and each represents a hydrogen atom or a methyl group. R ^b9 O represents an oxyalkylene group having 2 to 18 carbon atoms and may be the same or different. p1 represents the average addition mole number of an oxyalkylene group, and is a number of 1-500. R ^b10 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. ]

[In General Formula (b-4), R ^b11 and R ^b12 may be the same or different and each represents a hydrogen atom or a methyl group. R ^b13 represents an alkylene group having 1 to 6 carbon atoms or a direct bond. R ^b14 O represents an oxyalkylene group having 2 to 18 carbon atoms and may be the same or different. p2 represents the average addition mole number of an oxyalkylene group, and is a number of 1-500. R ^b15 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. ]

In the general formula (b-1), examples of R ^b3 include an alkyl group having 1 to 18 carbon atoms, a hydroxyalkyl group having 1 to 18 carbon atoms, and an aryl group having 6 to 18 carbon atoms. Moreover, as Y, a hydrogen atom, a hydroxyl group, a C1-C18 alkyl group, a C1-C18 hydroxyalkyl group, or a C6-C18 aryl group is mentioned.

In the general formula (b-2), examples of R ^b6 include a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, a hydroxyalkyl group having 1 to 18 carbon atoms, and an aryl group having 6 to 18 carbon atoms. . In the general formulas (b-3) and (b-4), examples of R ^b10 and R ^b15 include a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. It is done.

In the said General Formula (b-3) and (b-4), 2-8 are preferable and, as for carbon number of ^Rb9 and ^Rb14 in an oxyalkylene group, 2-4 are more preferable. Further, any two or more alkylene oxide adducts selected from ethylene oxide, propylene oxide, butylene oxide, styrene oxide and the like can be used in any of random addition, block addition, alternating addition, and the like. In order to secure a balance between hydrophilicity and hydrophobicity, it is preferable to include an oxyethylene group as an essential component in the oxyalkylene group, more preferably 50 mol% or more is an oxyethylene group, and 90 mol% or more. More preferably, it is an oxyethylene group.

In the above general formulas (b-3) and (b-4), the smaller the average addition mole number p1 and p2 of the oxyalkylene group, the lower the hydrophilicity of the resulting polymer, and the average addition mole number p1 and As p2 is larger, the copolymerization reactivity tends to decrease. The average added mole numbers p1 and p2 are each preferably 2 or more, more preferably 5 or more, still more preferably 10 or more, particularly preferably 15 or more, and most preferably 20 or more, On the other hand, it is preferably 300 or less. Moreover, as a suitable range, 2-500, 5-500, 10-500, 15-500, 20-300 etc. are mentioned.

In the general formula (b-4), examples of the alkylene group R ^b13 include a methylene group, an ethylene group, a trimethylene group, a methylethylene group, an ethylethylene group, a tetramethylene group, and a 1,2-dimethylethylene group. It is done. “R ^b13 is a direct bond” means that there is no portion represented by R ^b13 and a structure in which an oxygen atom is directly bonded to a carbon atom.

The monomer (b) is preferably a hydrophobic monomer from the viewpoint of suppressing water absorption into fine particles such as clay.

Examples of the monomer represented by the general formula (b-1) include alkyl (meth) acrylates such as ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, and butyl methacrylate; methyl acrylamide (N N-monoalkyl (meth) acrylamides such as methylacrylamide); N, N-dialkyl (meth) acrylamides such as dimethylacrylamide (N, N-dimethylacrylamide) and diethylacrylamide (N, N-diethylacrylamide); Can be mentioned.

Examples of the monomer represented by the general formula (b-2) include vinyl aromatics such as styrene, α-methylstyrene, vinyltoluene, and p-methylstyrene.

Examples of the monomer represented by the general formula (b-3) include unsaturated carboxylic acid polyalkylene glycol ester compounds, among which (alkoxy) polyalkylene glycol mono (meth) acrylate is preferable. It is.

Specifically, the following (alkoxy) polyethylene glycol (poly) (C2-C4 alkylene glycol) (meth) acrylic acid esters and the like are preferable.
Methoxy polyethylene glycol mono (meth) acrylate, methoxy {polyethylene glycol (poly) propylene glycol} mono (meth) acrylate, methoxy {polyethylene glycol (poly) butylene glycol} mono (meth) acrylate, methoxy {polyethylene glycol (poly) propylene glycol (Poly) butylene glycol} mono (meth) acrylate, ethoxypolyethyleneglycol mono (meth) acrylate, ethoxy {polyethyleneglycol (poly) propyleneglycol} mono (meth) acrylate, ethoxy {polyethyleneglycol (poly) butyleneglycol} mono (meta ) Acrylate, ethoxy {polyethylene glycol (poly) propylene glycol (poly) butylene glycol} mono (Meth) acrylate, propoxy polyethylene glycol mono (meth) acrylate, propoxy {polyethylene glycol (poly) propylene glycol} mono (meth) acrylate, propoxy {polyethylene glycol (poly) butylene glycol} mono (meth) acrylate, propoxy {polyethylene glycol ( Poly) propylene glycol (poly) butylene glycol} mono (meth) acrylate, butoxypolyethylene glycol mono (meth) acrylate, butoxy {polyethylene glycol (poly) propylene glycol} mono (meth) acrylate, butoxy {polyethylene glycol (poly) butylene glycol } Mono (meth) acrylate, butoxy {polyethylene glycol (poly) propylene glycol ( B) Butylene glycol} mono (meth) acrylate, pentoxypolyethyleneglycol mono (meth) acrylate, pentoxy {polyethyleneglycol (poly) propyleneglycol} mono (meth) acrylate, pentoxy {polyethyleneglycol (poly) butyleneglycol} mono (meth) ) Acrylate, pentoxy {polyethylene glycol (poly) propylene glycol (poly) butylene glycol} mono (meth) acrylate.

Hexoxypolyethylene glycol mono (meth) acrylate, hexoxy {polyethylene glycol (poly) propylene glycol} mono (meth) acrylate, hexoxy {polyethylene glycol (poly) butylene glycol} mono (meth) acrylate, hexoxy {polyethylene glycol (poly) propylene Glycol (poly) butylene glycol} mono (meth) acrylate, heptoxypolyethylene glycol mono (meth) acrylate, heptoxy {polyethylene glycol (poly) propylene glycol} mono (meth) acrylate, heptoxy {polyethylene glycol (poly) butylene glycol} mono (Meth) acrylate, heptoxy {polyethylene glycol (poly) propylene glycol (poly) butylene Recall} mono (meth) acrylate, octoxypolyethylene glycol mono (meth) acrylate, octoxy {polyethylene glycol (poly) propylene glycol} mono (meth) acrylate, octoxy {polyethylene glycol (poly) butylene glycol} mono (meth) acrylate, Octoxy {polyethylene glycol (poly) propylene glycol (poly) butylene glycol} mono (meth) acrylate, nonanoxy polyethylene glycol mono (meth) acrylate, nonanoxy {polyethylene glycol (poly) propylene glycol} mono (meth) acrylate, nonanoxy {polyethylene Glycol (poly) butylene glycol} mono (meth) acrylate, nonanoxy {polyethylene glycol (poly Propylene glycol (poly) butylene glycol} mono (meth) acrylate.

Examples of the monomer represented by the general formula (b-4) include unsaturated alcohol polyalkylene glycol adducts, among which vinyl alcohol alkylene oxide adducts and (meth) allyl alcohol alkylene oxide adducts. 3-buten-1-ol alkylene oxide adduct, isoprene alcohol (3-methyl-3-buten-1-ol) alkylene oxide adduct, 3-methyl-2-buten-1-ol alkylene oxide adduct, 2-methyl-3-buten-2-ol alkylene oxide adduct, 2-methyl-2-buten-1-ol alkylene oxide adduct, 2-methyl-3-buten-1-ol alkylene oxide adduct are preferred. is there.

Specifically, for example, polyethylene glycol monovinyl ether, polyethylene glycol monoallyl ether, polyethylene glycol monomethallyl ether, polyethylene glycol mono (2-methyl-2-propenyl) ether, polyethylene glycol mono (2-butenyl) ether, polyethylene glycol Mono (3-methyl-3-butenyl) ether, polyethylene glycol mono (3-methyl-2-butenyl) ether, polyethylene glycol mono (2-methyl-3-butenyl) ether, polyethylene glycol mono (2-methyl-2- Butenyl) ether, polyethylene glycol mono (1,1-dimethyl-2-propenyl) ether, polyethylene polypropylene glycol mono (3-methyl-3-butenyl) ether Methoxy polyethylene glycol mono (3-methyl-3-butenyl) ether, ethoxy polyethylene glycol mono (3-methyl-3-butenyl) ether, 1-propoxy polyethylene glycol mono (3-methyl-3-butenyl) ether, cyclohexyl Oxypolyethylene glycol mono (3-methyl-3-butenyl) ether, phenoxypolyethyleneglycol mono (3-methyl-3-butenyl) ether, methoxypolyethyleneglycolmonoallylether, ethoxypolyethyleneglycolmonoallylether, phenoxypolyethyleneglycolmonoallylether , Methoxy polyethylene glycol mono (2-methyl-2-propenyl) ether, ethoxy polyethylene glycol mono (2-methyl-2-propyl) Propenyl) ether, phenoxy polyethylene glycol mono (2-methyl-2-propenyl) ether and the like.

In the cationic polymer (A), the structure derived from the monomer (a) and the monomer (b) may exist by random polymerization, block polymerization, alternating polymerization, or the like.

In the cationic polymer (A), the molar ratio of the monomer (a) to the monomer (b) is (a) / (b) = 1/99 to 95/5. The smaller the amount of the vinyl monomer (a) having a cationic group, the smaller the interaction between the cationic polymer (A) and fine particles such as clay, so the molar ratio is (a) / (b ) = 10/90 to 95/5, more preferably 15/85 to 95/5.

The cationic polymer (A) has a weight average molecular weight of preferably 1,000 or more, and more preferably 3,000 or more. When the weight average molecular weight is less than 1,000, the interaction with fine particles such as clay becomes insufficient. The cationic polymer (A) preferably has a weight average molecular weight of 100,000 or less. When the weight average molecular weight exceeds 100,000, the viscosity of the hydraulic composition increases and the fluidity decreases.

The method for producing the cationic polymer (A) is not particularly limited, and can be produced, for example, by copolymerizing the monomer (a) and the monomer (b).
In order to obtain such a copolymer, the above-mentioned monomers may be mixed at a desired content ratio and polymerized using a polymerization initiator.

The additive for hydraulic composition of the present invention may contain other cationic polymer as long as it contains the cationic polymer (A) as an essential component, but the total amount of the cationic polymer is 100% by mass. Among these, it is preferable that the said cationic polymer (A) is 90 mass% or more. Moreover, it is more preferable that the additive for hydraulic compositions of the present invention contains substantially only the cationic polymer (A) as the cationic polymer. In addition, the additive for hydraulic compositions of this invention may contain only 1 type of cationic polymer (A), and may contain it 2 or more types.

The hydraulic composition additive of the present invention is preferably used for a hydraulic composition containing a fine particle component having a particle size of 75 μm or less.
In addition, as defined in JIS A1103: 2003, “fine particle component” means particles that pass through a metal mesh screen having a nominal aperture of 75 μm (0.075 mm).

Moreover, it is preferable that the additive for hydraulic compositions of this invention is used for the hydraulic composition containing a clay component.
In this specification, the clay includes clay minerals having no layered structure such as imogolite and allophane in addition to clay minerals having a layered structure. Examples of clay minerals having a layered structure include swellable minerals such as smectite, vermiculite, montmorillonite, bentonite, illite, hectorite, halloysite, mica and brittle mica; kaolin mineral (kaolinite), serpentine, pyrophyllite, talc, chlorite Non-swelling minerals such as light can be mentioned.
Among these, the hydraulic composition additive of the present invention is more preferably used for a hydraulic composition containing a clay component made of a clay mineral having a layered structure, and contains a clay component made of a non-swellable mineral. More preferably, it is used for a hydraulic composition.

The additive for a hydraulic composition of the present invention is preferably used for an application as an admixture for a hydraulic composition such as a cement admixture. It is preferable that the admixture for hydraulic composition further includes a dispersing agent for hydraulic powder for dispersing hydraulic powder such as cement, in addition to the additive for hydraulic composition of the present invention. An admixture for a hydraulic composition comprising the additive for a hydraulic composition according to the present invention and a dispersant for a hydraulic powder (B) for dispersing the hydraulic powder. Is also one aspect of the present invention.

［一般式（ｃ−１）中、Ｒ^ｃ１及びＲ^ｃ２は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。Ｍは、水素原子、金属原子、アンモニウム基又は有機アミン基を表す。］

［一般式（ｃ−２）中、Ｒ^ｃ３及びＲ^ｃ４は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。Ｒ^ｃ５Ｏは、炭素数２〜１８のオキシアルキレン基を表し、同一でも異なっていてもよい。ｑ１は、オキシアルキレン基の平均付加モル数を表し、１〜５００の数である。Ｒ^ｃ６は、水素原子、炭素数１〜１８のアルキル基、又は、炭素数６〜１８のアリール基を表す。］

［一般式（ｃ−３）中、Ｒ^ｃ７及びＲ^ｃ８は、同一でも異なっていてもよく、それぞれ水素原子又はメチル基を表す。Ｒ^ｃ９は、炭素数１〜６のアルキレン基又は直接結合を表す。Ｒ^ｃ１０Ｏは、炭素数２〜１８のオキシアルキレン基を表し、同一でも異なっていてもよい。ｑ２は、オキシアルキレン基の平均付加モル数を表し、１〜５００の数である。Ｒ^ｃ１１は、水素原子、炭素数１〜１８のアルキル基、又は、炭素数６〜１８のアリール基を表す。］ 1 type may be sufficient as the said dispersing agent (B) for hydraulic powders, and 2 or more types may be sufficient as it.
The above-described dispersant for hydraulic powder (B) is not particularly limited as long as it disperses hydraulic powder, and a structure derived from a monomer represented by the following general formula (c-1); It is preferable to include a polymer having a structure derived from a monomer represented by the following general formula (c-2) and / or (c-3).

[In general formula (c-1), R ^c1 and R ^c2 may be the same or different and each represents a hydrogen atom or a methyl group. M represents a hydrogen atom, a metal atom, an ammonium group or an organic amine group. ]

[In General Formula (c-2), R ^c3 and R ^c4 may be the same or different and each represents a hydrogen atom or a methyl group. R ^c5 O represents an oxyalkylene group having 2 to 18 carbon atoms, and may be the same or different. q1 represents the average addition mole number of an oxyalkylene group, and is a number of 1-500. R ^c6 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. ]

[In General Formula (c-3), R ^c7 and R ^c8 may be the same or different and each represents a hydrogen atom or a methyl group. R ^c9 represents an alkylene group having 1 to 6 carbon atoms or a direct bond. R ^c10 O represents an oxyalkylene group having 2 to 18 carbon atoms and may be the same or different. q2 represents the average addition mole number of an oxyalkylene group, and is a number of 1-500. R ^c11 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. ]

Each of the monomers represented by the general formulas (c-1) to (c-3) may be one kind or two or more kinds.
The “structure derived from the monomers represented by the general formulas (c-1) to (c-3)” means a structure in which a polymerizable double bond of the monomer is opened by a polymerization reaction (2 A double bond (C = C) corresponds to a single bond (-C-C-).

In the general formula (c-1), examples of the metal atom represented by M include monovalent metal atoms such as alkali metal atoms such as lithium, sodium and potassium; alkaline earth metal atoms such as calcium and magnesium; A trivalent metal atom such as aluminum or iron. The ammonium group is a functional group represented by “—NH ₃ ⁺ ”. Examples of the organic amine group include alkanolamine groups such as monoethanolamine group, diethanolamine group and triethanolamine group; alkylamine groups such as monoethylamine, diethylamine and triethylamine; polyamine groups such as ethylenediamine and triethylenediamine. Can be mentioned.

In the general formulas (c-2) and (c-3), examples of R ^c6 and R ^c11 include a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. It is done.

In formula (c-2) and (c-3), the carbon number of ^{R c5} and ^{R c10} in oxyalkylene group preferably has 2-8, 2-4 is more preferable. Further, any two or more alkylene oxide adducts selected from ethylene oxide, propylene oxide, butylene oxide, styrene oxide and the like can be used in any of random addition, block addition, alternating addition, and the like. In order to secure a balance between hydrophilicity and hydrophobicity, it is preferable to include an oxyethylene group as an essential component in the oxyalkylene group, more preferably 50 mol% or more is an oxyethylene group, and 90 mol% or more. More preferably, it is an oxyethylene group.

In the general formulas (c-2) and (c-3), the smaller the average addition mole number q1 and q2 of the oxyalkylene group, the lower the hydrophilicity of the resulting polymer, and the average addition mole number q1 and As q2 is larger, the copolymerization reactivity tends to decrease. The average added mole numbers q1 and q2 are each preferably 2 or more, more preferably 5 or more, still more preferably 10 or more, particularly preferably 15 or more, and most preferably 20 or more, On the other hand, it is preferably 300 or less. Moreover, as a suitable range, 2-500, 5-500, 10-500, 15-500, 20-300 etc. are mentioned.

In the general formula (c-3), examples of the alkylene group R ^c9 include a methylene group, an ethylene group, a trimethylene group, a methylethylene group, an ethylethylene group, a tetramethylene group, and a 1,2-dimethylethylene group. It is done. “R ^c9 is a direct bond” means that there is no portion represented by R ^c9 and a structure in which an oxygen atom is directly bonded to a carbon atom.

In the dispersant for hydraulic powder (B), the monomer represented by the general formula (c-1) and the single unit represented by the general formula (c-2) and / or (c-3). The molar ratio with the monomer is preferably (c-1) / [(c-2) + (c-3)] = 1/99 to 99/1, and 10/90 to 90/10. It is more preferable.

Examples of the dispersant for hydraulic powder (B) include, for example, a copolymer of polyethylene glycol monoallyl ether and maleic acid (salt); polyalkylene glycol (meth) allyl ether or polyalkylene glycol (meth) acrylate, A copolymer obtained by copolymerizing a monomer component comprising an unsaturated sulfonate and (meth) acrylate; a copolymer of (meth) acrylamide and (meth) acrylic acid (salt); Copolymer obtained by copolymerizing a monomer component comprising (meth) acrylamide having a sulfonate group, (meth) acrylic acid ester, and (meth) acrylic acid (salt); polyalkylene glycol vinyl ether or polyalkylene Copolymer of glycol (meth) allyl ether and (meth) acrylic acid (salt); polyalkylene glycol Copolymer of styrene (meth) acrylate and (meth) acrylic acid (salt); polymerizing monomer component containing unsaturated carboxylic acid (salt) and monomer having polyalkylene glycol chain as essential components And the like.

Among the above examples, a copolymer obtained by polymerizing a monomer component containing an unsaturated carboxylic acid (salt) and a monomer having a polyalkylene glycol chain as essential components is preferable. Examples of the unsaturated carboxylic acid (salt) include acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid, citraconic acid, and the like, and neutralized products or partially neutralized products thereof. 1 type (s) or 2 or more types can be used. Examples of monomers having a polyalkylene glycol chain include hydroxyalkyl (meth) acrylates such as hydroxylethyl (meth) acrylate; ethylene glycol mono (meth) acrylate, polyethylene glycol / polypropylene glycol mono (meth) acrylate, etc. Polyalkylene glycol mono (meth) acrylates; alkoxypolyalkylene glycol mono (meth) acrylates such as methoxypolyethylene glycol mono (meth) acrylate and ethoxypolyethyleneglycol mono (meth) acrylate; polys such as ethylene glycol mono (meth) allyl ether Alkylene glycol mono (meth) allyl ether; alkoxypolyalkyl such as methoxypolyethylene glycol mono (meth) allyl ether A polyalkylene glycol monochloro ether such as ethylene glycol monochloro ether; an alkoxy polyalkylene glycol monochloro ether such as methoxy polyethylene glycol monochloro ether; Two or more kinds can be used. These dispersants may be used alone or in combination of two or more.

In the admixture for hydraulic composition of the present invention, the proportion of the cationic polymer (A), which is an essential component of the additive for hydraulic composition of the present invention, is determined by the dispersion for the cationic polymer (A) and the hydraulic powder. 1-90 mass% is preferable with respect to a total of 100 mass% of an agent (B), and 1-80 mass% is more preferable. On the other hand, the ratio of the dispersant for hydraulic powder (B) is preferably 10 to 99% by mass with respect to 100% by mass in total of the cationic polymer (A) and the dispersant for hydraulic powder (B). 20-99 mass% is more preferable.

The additive for a hydraulic composition of the present invention can be used in addition to a hydraulic composition such as a cement composition. Such a hydraulic composition comprising the additive for a hydraulic composition of the present invention, water, hydraulic powder and / or aggregate is also one aspect of the present invention. .

In the hydraulic composition of the present invention, the hydraulic powder is a powder having physical properties that are cured by a hydration reaction, and examples thereof include cement and gypsum. In addition, when hydraulic powder is a cement, a hydraulic composition is also called a cement composition. The cement composition includes cement paste, mortar, concrete and the like.

When the hydraulic powder is cement, Portland cement (ordinary, early strength, ultra-early strength, moderate heat, sulfate resistance and low alkali type); various mixed cements (blast furnace cement, silica cement) , Fly ash cement); white Portland cement; alumina cement; super fast cement (1 clinker fast cement, 2 clinker fast cement, magnesium phosphate cement); grout cement; oil well cement; low heat cement (low heat blast furnace) Cement, fly ash mixed low heat generation type blast furnace cement, belite high content cement); super high strength cement; cement-based solidified material; eco-cement (manufactured from municipal waste incineration ash and sewage sludge incineration ash as raw materials) Cement), etc., and blast furnace slag, fly ash Cinder ash, clinker ash, husk ash, silica fume, silica powder, and a film obtained by adding a fine powder and gypsum limestone powder.

In addition to gravel, crushed stone, granulated slag, recycled aggregate, etc., aggregates such as siliceous, clay, zircon, high alumina, silicon carbide, graphite, chrome, chromic, magnesia, etc. Examples include fireproof aggregates.

When the hydraulic composition of the present invention is a cement composition, the unit water amount per 1 m ³ , the cement use amount, and the water / cement ratio are not particularly limited. For example, the unit water amount is 100 to 185 kg / m ³ , the cement used It is preferable that the amount is 250 to 800 kg / m ³ and the water / cement ratio (mass ratio) is 0.1 to 0.7. More preferably, the unit water amount is 120 to 175 kg / m ³ , the cement amount used is 270 to 800 kg / m ³ , and the water / cement ratio (mass ratio) = 0.15 to 0.65. As described above, the cement composition can be widely used from poor blending to rich blending, and is effective for both high-strength concrete having a large unit cement amount and poor blending concrete having a unit cement amount of 300 kg / m ³ or less. . The cement composition has a relatively high water reduction rate, that is, a water / cement ratio of water / cement ratio (mass ratio) = 0.15 to 0.5 (preferably 0.15 to 0.4). Even in a low region, it can be used satisfactorily.

Further, when the hydraulic composition of the present invention is a cement composition, the cement composition can exhibit excellent performance in a high water reduction rate region with high performance, and has excellent workability. It can also be effectively applied to ready-mixed concrete, concrete for concrete secondary products (precast concrete), concrete for centrifugal molding, concrete for vibration compaction, steam-cured concrete, sprayed concrete, and the like. Also, medium-fluidity concrete (concrete with a slump value of 22-25 cm), high-fluidity concrete (concrete with a slump value of 25 cm or more and a slump flow value of 50-70 cm), self-filling concrete, self-leveling material It is also effective for mortar and concrete that require high fluidity.

When the hydraulic composition of the present invention is a cement composition, the blending ratio of the additive for hydraulic composition of the present invention is, for example, the cationic polymer (A) that is an essential component of the present invention (when a plurality of additives are included) Is preferably set to 0.001 to 5% by mass in terms of solid content with respect to 100% by mass of the total mass of cement.

It is preferable that the hydraulic composition of the present invention further includes the above-described dispersant for hydraulic powder (B).

When the hydraulic composition of the present invention is a cement composition, the blending ratio of the dispersant for hydraulic powder (B) is, for example, in terms of solid content, with respect to 100 mass% of the total mass of cement, It is preferable to set so that it may become 0.01-5 mass%. If it is less than 0.01% by mass, the performance may not be sufficient. On the other hand, if it exceeds 5% by mass, the effect will substantially reach its peak, which may be disadvantageous from the economical aspect. More preferably, it is 0.02-2 mass%, More preferably, it is 0.05-1 mass%. In the present specification, the solid content can be measured as follows.
(Solid content measurement method)
1. Weigh the aluminum dish.
The solid content to be measured is precisely weighed on the aluminum dish precisely weighed in 2.1.
3. A solid content measurement product precisely weighed in 2 is placed in a dryer adjusted to 130 ° C. in a nitrogen atmosphere for 1 hour.
4. After 1 hour, remove from the dryer and allow to cool in a desiccator at room temperature for 15 minutes.
5. After 15 minutes, remove from the desiccator and precisely weigh the aluminum dish and the measurement object.
The solid content is measured by subtracting the mass of the aluminum pan obtained in 1 from the mass obtained in 6.5 and dividing by the mass of the solid content measurement product obtained in 2.

When the additive for hydraulic composition of the present invention and the dispersant for hydraulic powder (B) are added to concrete (or mortar), two components may be added in any order, The components may be added together, or may be mixed and added in advance. Among these, from the viewpoint of preventing the dispersant for hydraulic powder (B) from adsorbing to fine particles such as clay, after adding the additive for hydraulic composition of the present invention, the above hydraulic powder It is preferable to add the dispersant (B).

Furthermore, the hydraulic composition of the present invention can contain other known hydraulic composition additives (cement additives) as exemplified in the following (1) to (20).
(1) Water-soluble polymer substance: unsaturated carboxylic acid polymer such as polyacrylic acid (sodium), polymethacrylic acid (sodium), polymaleic acid (sodium), sodium salt of acrylic acid / maleic acid copolymer; methyl Nonionic cellulose ethers such as cellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, and hydroxypropyl cellulose; polysaccharides such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose A part of or all of the hydroxyl groups of the alkylated or hydroxyalkylated derivatives of the above are a hydrophobic substituent having a hydrocarbon chain having 8 to 40 carbon atoms as a partial structure, a sulfonic acid group or Polysaccharide derivatives substituted with an ionic hydrophilic substituent containing such a salt as a partial structure; yeast glucan, xanthan gum, β-1.3 glucans (both linear and branched) For example, polysaccharides produced by microbial fermentation such as curdlan, paramylon, pachyman, scleroglucan, laminaran, etc.); polyacrylamide; polyvinyl alcohol; starch; starch phosphate ester; sodium alginate; gelatin; Copolymers of acrylic acid having groups and quaternary compounds thereof.

(2) Polymer emulsion: Copolymers of various vinyl monomers such as alkyl (meth) acrylate.
(3) retarder: oxycarboxylic such as gluconic acid, glucoheptonic acid, arabonic acid, malic acid or citric acid, and inorganic salts or organic salts thereof such as sodium, potassium, calcium, magnesium, ammonium, triethanolamine, etc. Acid; monosaccharides such as glucose, fructose, galactose, saccharose, xylose, apiose, ribose, isomerized sugar, oligosaccharides such as disaccharide and trisaccharide, oligosaccharides such as dextrin, polysaccharides such as dextran, etc. Sugars such as molasses; sugar alcohols such as sorbitol; magnesium silicofluoride; phosphoric acid and its salts or borate esters; aminocarboxylic acids and salts thereof; alkali-soluble proteins; humic acid; tannic acid; Polyhydric alcohols such as glycerin; aminotri (methylenephos Acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetra (methylenephosphonic acid), diethylenetriaminepenta (methylenephosphonic acid) and their alkali metal salts, alkaline earth metal salts and other phosphonic acids and their derivatives etc.

(4) Early strengthening agents / accelerators: soluble calcium salts such as calcium chloride, calcium nitrite, calcium nitrate, calcium bromide and calcium iodide; chlorides such as iron chloride and magnesium chloride; sulfates; potassium hydroxide; Sodium hydroxide; carbonate; thiosulfate; formate such as formic acid and calcium formate; alkanolamine; alumina cement; calcium aluminate silicate.
(5) Mineral oil-based antifoaming agent: cocoon oil, liquid paraffin, etc.
(6) Fat and oil-based antifoaming agents: animal and vegetable oils, sesame oil, castor oil, alkylene oxide adducts thereof and the like.
(7) Fatty acid-based antifoaming agent: oleic acid, stearic acid, and these alkylene oxide adducts.
(8) Fatty acid ester antifoaming agent: glycerin monoricinoleate, alkenyl succinic acid derivative, sorbitol monolaurate, sorbitol trioleate, natural wax and the like.
(9) Oxyalkylene antifoaming agents: polyoxyalkylenes such as (poly) oxyethylene (poly) oxypropylene adducts; diethylene glycol heptyl ether, polyoxyethylene oleyl ether, polyoxypropylene butyl ether, polyoxyethylene polyoxypropylene (Poly) oxyalkyl ethers such as 2-ethylhexyl ether and oxyethyleneoxypropylene adducts to higher alcohols having 12 to 14 carbon atoms; (poly) oxy such as polyoxypropylene phenyl ether and polyoxyethylene nonylphenyl ether Alkylene (alkyl) aryl ethers; 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 2,5-dimethyl-3-hexyne-2,5-diol, 3-methyl-1 − Acetylene ethers obtained by addition polymerization of alkylene oxide to acetylenic alcohol such as tin-3-ol; (poly) oxyalkylene fatty acid esters such as diethylene glycol oleate, diethylene glycol laurate, ethylene glycol distearate; polyoxyethylene (Poly) oxyalkylene sorbitan fatty acid esters such as sorbitan monolaurate and polyoxyethylene sorbitan trioleate; (poly) oxyalkylene alkyl such as sodium polyoxypropylene methyl ether sulfate and sodium polyoxyethylene dodecylphenol ether sulfate ( Aryl) ether sulfate salts; (poly) oxyethylene stearyl phosphates, etc. Sialic sharp emission alkyl phosphate esters; polyoxyethylene such as polyoxyethylene lauryl amine (poly) oxyalkylene alkyl amines; polyoxyalkylene amide.

(10) Alcohol-based antifoaming agent: octyl alcohol, hexadecyl alcohol, acetylene alcohol, glycols and the like.
(11) Amide antifoaming agent: acrylate polyamine and the like.
(12) Phosphate ester antifoaming agent: tributyl phosphate, sodium octyl phosphate, etc.
(13) Metal soap type antifoaming agent: aluminum stearate, calcium oleate, etc.
(14) Silicone antifoaming agent: dimethyl silicone oil, silicone paste, silicone emulsion, organically modified polysiloxane (polyorganosiloxane such as dimethylpolysiloxane), fluorosilicone oil and the like.

(15) AE agent: resin soap, saturated or unsaturated fatty acid, sodium hydroxystearate, lauryl sulfate, ABS (alkyl benzene sulfonic acid), LAS (linear alkyl benzene sulfonic acid), alkane sulfonate, polyoxyethylene alkyl (phenyl) ether , Polyoxyethylene alkyl (phenyl) ether sulfate or a salt thereof, polyoxyethylene alkyl (phenyl) ether phosphate or a salt thereof, protein material, alkenyl sulfosuccinic acid, α-olefin sulfonate, and the like.

(16) Other surfactants: aliphatic monohydric alcohols having 6 to 30 carbon atoms in the molecule such as octadecyl alcohol and stearyl alcohol, and those having 6 to 30 carbon atoms in the molecule such as abiethyl alcohol Intramolecular such as alicyclic monohydric alcohol, dodecyl mercaptan, etc. Intramolecular such as monovalent mercaptan having 6-30 carbon atoms in the molecule, such as nonylphenol, alkylphenol having 6-30 carbon atoms in the molecule, dodecylamine, etc. 10 mol or more of an alkylene oxide such as ethylene oxide or propylene oxide was added to a carboxylic acid having 6 to 30 carbon atoms in the molecule such as an amine having 6 to 30 carbon atoms, lauric acid or stearic acid. Polyalkylene oxide derivatives having an alkyl or alkoxy group as a substituent Alkyl diphenyl ether sulfonates in which two phenyl groups having a sulfone group are ether-bonded; various anionic surfactants; various cationic surfactants such as alkylamine acetate and alkyltrimethylammonium chloride; various nonionics Surfactant; various amphoteric surfactants.
(17) Waterproofing agent: fatty acid (salt), fatty acid ester, oil and fat, silicon, paraffin, asphalt, wax and the like.
(18) Rust preventive: nitrite, phosphate, zinc oxide and the like.
(19) Crack reducing agent: polyoxyalkyl ether and the like.
(20) Expansion material: Ettlingite, coal, etc.

Other known hydraulic composition additives (cement additives) include cement wetting agents, thickeners, separation reducers, flocculants, drying shrinkage reducers, strength enhancers, self-leveling agents, rust inhibitors. , Coloring agents, fungicides and the like. The above-mentioned known additive for hydraulic composition (cement additive) can be used in combination.

In the hydraulic composition of the present invention, particularly preferred embodiments of the components other than the hydraulic powder (cement) and water include the following 1) to 4).
1) A combination that essentially comprises two components, [1] an admixture for hydraulic composition of the present invention (cement admixture) and [2] an oxyalkylene antifoaming agent. The blending mass ratio of the oxyalkylene antifoaming agent [2] is preferably 0.01 to 10% by mass with respect to the hydraulic composition admixture (cement admixture) of [1].

2) [1] A combination comprising two components of the hydraulic composition of the present invention (cement admixture) and [2] a material separation reducing agent. As a material separation reducing agent, various thickeners such as nonionic cellulose ethers, a hydrophobic substituent consisting of a hydrocarbon chain having 4 to 30 carbon atoms as a partial structure and an alkylene oxide having 2 to 18 carbon atoms are added on average. A compound having a polyoxyalkylene chain having 2 to 300 moles added can be used. The blending mass ratio of the hydraulic composition admixture (cement admixture) of [1] and the material separation reducing agent of [2] is preferably 10/90 to 99.99 / 0.01, 50 /50-99.9/0.1 is more preferable. A hydraulic composition (cement composition) composed of this combination is suitable as high-fluidity concrete, self-filling concrete, and self-leveling material.

3) [1] A combination comprising two components of the hydraulic composition of the present invention (cement admixture) and [2] retarder. As the retarder, oxycarboxylic acids such as gluconic acid (salt) and citric acid (salt), sugars such as glucose, sugar alcohols such as sorbitol, phosphonic acids such as aminotri (methylenephosphonic acid), and the like can be used. . The blending mass ratio of the hydraulic composition admixture (cement admixture) of [1] and the retarder of [2] is preferably 50/50 to 99.9 / 0.1, 70/30 -99/1 is more preferred.

4) [1] Combination comprising two components of the hydraulic composition of the present invention (cement admixture) and [2] accelerator. As the accelerator, soluble calcium salts such as calcium chloride, calcium nitrite and calcium nitrate, chlorides such as iron chloride and magnesium chloride, formates such as thiosulfate, formic acid and calcium formate, and the like can be used. The blending mass ratio of the hydraulic composition admixture (cement admixture) of [1] and the accelerator of [2] is preferably 10/90 to 99.9 / 0.1, and 20/80 -99/1 is more preferred.

The additive for a hydraulic composition of the present invention has the above-described configuration, and has a fluidity, retainability, and strength, regardless of the content of fine components, with respect to a hydraulic composition containing an aggregate that is not of high quality. And an additive for a hydraulic composition that can improve the state of concrete or the like and give excellent properties to a hydraulic composition such as concrete.
Therefore, the hydraulic composition containing the additive for hydraulic composition of the present invention is suitably used in the civil engineering / architectural field.

The present invention will be described in more detail with reference to the following examples. However, the present invention is not limited to these examples. Unless otherwise specified, “part” means “part by weight” and “%” means “mass%”.

<Explanation of abbreviations>
DEAE-23EO-MMA: Esterified product of ethylene oxide average 23 mol adduct of diethylaminoethanol and methacrylic acid DEAE-50EO-MMA: Esterified product of ethylene oxide average 50 mol adduct of diethylaminoethanol and methacrylic acid PGM23E: Methoxypolyethylene glycol mono Methacrylate (average added mole number of ethylene oxide 23)
PGM25E: Methoxypolyethylene glycol monomethacrylate (average added mole number of ethylene oxide 25)
IPN10: Unsaturated polyalkylene glycol ether and averaged 10 moles addition of ethylene oxide to isoprenol IPN50: unsaturated polyalkylene glycol ether and averaged 50 mols of ethylene oxide to isoprenol _{IPN10-Q-CH 3 CO 2} : IPN10-Q counter anion acetate Salt DMAEA-Q: dimethylaminoethyl acrylate methyl chloride quaternary salt (manufactured by Kojin Film & Chemicals)
DMAPAA-Q: dimethylaminopropylacrylamide methyl chloride quaternary salt (manufactured by Kojin Film & Chemicals)
DMAEM-Q: dimethylaminoethyl methacrylate methyl chloride quaternary salt (manufactured by Kojin Film & Chemicals)

<Preparation of monomer (a)>
Preparation example of IPN10-Q 1679.8 g of IPN10 and 1406.0 g of epichlorohydrin are charged all at once into a 5 L four-necked flask equipped with a stirring blade, a thermometer, and a cooling tube, and the internal temperature becomes 50 ° C. while stirring and mixing. So warmed. To this, 374.3 g of 48% aqueous sodium hydroxide solution was added dropwise over 2 hours, and the mixture was further stirred for 4 hours while maintaining the internal temperature of 50 ° C. During the reaction, the reaction was carried out while reducing the pressure in the system and distilling off water. After cooling the obtained solution to room temperature, the precipitated salt was removed by washing with water, and further epichlorohydrin and water mixed by vacuum distillation were removed to obtain an IPN10-terminal glycidylated compound-containing composition (IPEG10). 1732.0 g was obtained. Next, IPEG10 (1100.0 g) and 30% trimethylamine hydrochloride aqueous solution (532.6 g) were charged all at once into a 2 L four-necked flask equipped with a stirring blade, a thermometer, and a cooling tube, and the inner temperature was 50 ° C. while stirring and mixing. The mixture was stirred for 6 hours to obtain a water-soluble monomer-containing composition containing IPN10-Q. IPN10-Q (65% aq.) Was obtained using ion-exchanged water so that the nonvolatile content was 65%.

IPN10-Q has a structure in which n is 10 and X ⁻ is Cl ⁻ (chloride ion) in the above general formula (a-2-2).

Preparation example of PGM23E-Q Into a 5 L four-necked flask equipped with a stirring blade, a thermometer, and a condenser tube, 500.0 g of DEAE-23EO-MMA was charged all at once, and the temperature was increased to 50 ° C. while stirring and mixing. Warm up. To this, 30.2 g of dimethylsulfuric acid was added dropwise over 2 hours, the internal temperature was maintained at 50 ° C., and the mixture was further stirred for 2 hours to obtain PGM23E-Q.

Preparation example of PGM50E-Q Add 500.0 g of DEAE-50EO-MMA into a 5 L four-necked flask equipped with a stirring blade, a thermometer, and a cooling tube at a time, and add it so that the internal temperature becomes 70 ° C. while stirring and mixing. Warm up. To this, 62.5 g of dimethylsulfuric acid was added dropwise over 2 hours, the internal temperature was maintained at 70 ° C., and the mixture was further stirred for 2 hours to obtain PGM50E-Q.

Note that PGM23E-Q has a structure in which, in the above general formula (a-1-3), n is 23 and X ⁻ is CH ₃ SO ₄ ⁻ (methyl sulfate ion). Further, PGM50E-Q has a structure in which n is 50 and X ⁻ is CH ₃ SO ₄ ^— in the above general formula (a-1-3).

<Preparation of copolymer>
Production Example 1
Into a glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen introduction tube and a reflux condenser, 719.1 g of IPN10-Q (65% aq.) Was charged as the monomer (a) and the temperature was raised to 80 ° C. After warming, 132.5 g of butyl acrylate was added dropwise as monomer (b) over 3 hours. At the same time, an aqueous solution in which 3.7 g of 3-mercaptopropionic acid was dissolved in 68.4 g of 4% sodium persulfate aqueous solution and 76.2 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (A-1) was obtained.

Production Example 2
Into a glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen inlet tube and a reflux condenser, 800.2 g of IPN10-Q (65% aq.) Was charged as the monomer (a) and the temperature was raised to 80 ° C. After warming, 79.9 g of styrene was added dropwise as the monomer (b) over 3 hours. At the same time, an aqueous solution in which 6.3 g of 3-mercaptopropionic acid was dissolved in 60.9 g of 4% sodium persulfate aqueous solution and 55.8 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, thereby obtaining a copolymer (A-2).

Production Example 3
A glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen inlet tube and a reflux condenser was charged with 242.1 g of ion-exchanged water, heated to 80 ° C., and then PGM50E− as monomer (a). 449.6 g of Q and 150.4 g of butyl methacrylate as the monomer (b) were added dropwise over 3 hours. At the same time, an aqueous solution in which 2.6 g of 3-mercaptopropionic acid was dissolved in 49.4 g of 4% aqueous sodium persulfate solution and 105.9 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (A-3) was obtained.

Production Example 4
A glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen inlet tube and a reflux condenser was charged with 662.2 g of IPN10-Q-CH ₃ CO ₂ (65% aq.) As the monomer (a). After the temperature was raised to 80 ° C., 169.6 g of 2-ethylhexyl acrylate was added dropwise as the monomer (b) over 3 hours. At the same time, an aqueous solution in which 4.9 g of 3-mercaptopropionic acid was dissolved in 60.9 g of 4% sodium persulfate aqueous solution and 102.5 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (A-4) was obtained.

Production Example 5
A glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen inlet tube and a reflux condenser was charged with 127.4 g of ion exchange water, heated to 80 ° C., and then DMAEA- as a monomer (a). 200.9 g of Q and 399.1 g of butyl acrylate as the monomer (b) were added dropwise over 3 hours. At the same time, an aqueous solution in which 10.4 g of 3-mercaptopropionic acid was dissolved in 164.8 g of 4% sodium persulfate aqueous solution and 118.2 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropwise addition, stirring was continued for 1 hour to complete the polymerization reaction, thereby obtaining a copolymer (A-5).

Production Example 6
A glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen inlet tube and a reflux condenser was charged with 321.3 g of ion-exchanged water, heated to 80 ° C., and then PGM23E− as monomer (a). Q 596.6 g and 3.4 g of butyl methacrylate as the monomer (b) were added dropwise over 3 hours. At the same time, an aqueous solution in which 1.5 g of 3-mercaptopropionic acid was dissolved in 18.8 g of 4% sodium persulfate aqueous solution and 58.4 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropwise addition, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (A-6) was obtained.

Production Example 7
In a glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen introducing tube and a reflux condenser, 298.0 g of ion-exchanged water was charged, and the temperature was raised to 80 ° C. Q497.6g and dimethylacrylamide 102.4g as a monomer (b) were dripped over 3 hours. At the same time, an aqueous solution obtained by dissolving 14.6 g of 3-mercaptopropionic acid in 68.3 g of an 8% aqueous sodium persulfate solution and 49.1 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (A-7) was obtained.

Production Example 8
A glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen introduction tube and a reflux condenser was charged with 333.3 g of ion-exchanged water, heated to 80 ° C., and then DMAEM− as a monomer (a). 109.3 g of Q and 390.7 g of PGM23E as the monomer (b) were added dropwise over 3 hours. At the same time, an aqueous solution obtained by dissolving 1.7 g of 3-mercaptopropionic acid in 34.8 g of 4% sodium persulfate aqueous solution and 130.0 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropwise addition, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (A-8) was obtained.

Production Example 9
In a glass reaction vessel equipped with a thermometer, stirrer, dropping funnel, nitrogen inlet tube and reflux condenser, IPN10-Q (65% aq.) 323.8 g as monomer (a), monomer (b1) As the monomer (b2), 58.0 g of ethyl acrylate was added dropwise over 3 hours, after charging 331.5 g of IPN50 and 155.0 g of ion-exchanged water. Simultaneously, 41.1 g of 4% sodium persulfate aqueous solution and an aqueous solution in which 1.1 g of 3-mercaptopropionic acid was dissolved in 66.0 g of ion-exchanged water were added dropwise over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (A-9) was obtained.

Production Example 10
In a glass reaction vessel equipped with a thermometer, stirrer, dropping funnel, nitrogen inlet tube and reflux condenser, 104.2 g of IPN10-Q (65% aq.) As monomer (a), monomer (b1) As the monomer (b2), 6.0 g of butyl acrylate was added dropwise over 3 hours, after charging 426.4 g of IPN50 and 292.9 g of ion-exchanged water. At the same time, an aqueous solution in which 0.6 g of 3-mercaptopropionic acid was dissolved in 13.2 g of 4% sodium persulfate aqueous solution and 156.8 g of ion-exchanged water was dropped over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (A-10) was obtained.

Production Example 11
Into a glass reaction vessel equipped with a thermometer, stirrer, dropping funnel, nitrogen inlet tube and reflux condenser, 664.9 g of IPN10-Q (65% aq.) As monomer (a) was charged and the temperature was raised to 80 ° C. After warming, 67.8 g of acrylic acid was added dropwise as the monomer (b) over 3 hours. At the same time, an aqueous solution in which 3.0 g of 3-mercaptopropionic acid was dissolved in 25.1 g of a 10% aqueous sodium persulfate solution and 183.8 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (B-1) was obtained.

Production Example 12
Into a glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen introduction tube and a reflux condenser, 779.6 g of IPN10-Q (65% aq.) Was charged as the monomer (a) and the temperature was raised to 80 ° C. After warming, 90.0 g of butyl acrylate as monomer (b1) and 3.2 g of acrylic acid as monomer (b2) were added dropwise over 3 hours. At the same time, an aqueous solution in which 3.2 g of 3-mercaptopropionic acid was dissolved in 59.3 g of 4% sodium persulfate aqueous solution and 64.7 g of ion-exchanged water was added dropwise over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a copolymer (B-2) was obtained.

Production Example 13
A glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen introducing tube and a reflux condenser was charged with 323.1 g of ion exchange water, heated to 80 ° C., and then DMAEA- as a monomer (a). 600.0 g of Q was added dropwise over 3 hours. Simultaneously, 49.2 g of 4% sodium persulfate aqueous solution and an aqueous solution in which 13.2 g of 3-mercaptopropionic acid was dissolved in 14.5 g of ion-exchanged water were added dropwise over 3.5 hours. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction, and a polymer (B-3) was obtained.

Production Example 14
A glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen introducing tube and a reflux condenser was charged with 200.0 g of ion exchange water, heated to 60 ° C., 415.2 g of PGM25E, and 82. An aqueous solution in which 7 g was dissolved in 114.3 g of ion-exchanged water was added dropwise over 3 hours. At the same time, 22.2 g of 4% hydrogen peroxide aqueous solution and an aqueous solution in which 1.2 g of L-ascorbic acid and 4.2 g of 3-mercaptopropionic acid were dissolved in 147.5 g of ion-exchanged water were dropped over 3.5 hours. did. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction. An aqueous solution of a water reducing agent (C-1) which is a copolymer having a weight average molecular weight of 20,000 was obtained.

Production Example 15
A glass reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, a nitrogen introducing tube and a reflux condenser was charged with 293.6 g of ion-exchanged water and 440.3 g of IPN50, and the temperature was raised to 60 ° C. 6 g was added dropwise over 3 hours. At the same time, an aqueous solution in which 0.9 g of L-ascorbic acid and 1.8 g of 3-mercaptopropionic acid are dissolved in 17.3 g of 4% aqueous hydrogen peroxide and 186.3 g of ion-exchanged water is dropped over 3.5 hours. did. After completion of the dropping, stirring was continued for 1 hour to complete the polymerization reaction. An aqueous solution of a water reducing agent (C-2) which is a copolymer having a weight average molecular weight of 35,000 was obtained.

<Atomic weight>
The atomic weight of each element used for calculating the molecular weight of the monomer is as follows.
Hydrogen atom (H): 1.008
Carbon atom (C): 12.01
Nitrogen atom (N): 14.007
Oxygen atom (O): 15.999
Sulfur atom (S): 32.060
Chlorine atom (Cl): 35.453

<Molecular weight of monomer (a) and monomer (b)>
Based on the atomic weight, the molecular weight was calculated from the molecular formula of each monomer. In addition, about the ethylene oxide adduct, the monomer of the average addition mole number was represented, and it was set as the molecular formula.
IPN10-Q: 678.3
PGM50E-Q: 2485.8
_{IPN10-Q-CH 3 CO 2} : 701.9
DMAEA-Q: 193.5
PGM23E-Q: 1324.5
DMAPAA-Q: 206.5
DMAEM-Q: 207.7
Butyl acrylate: 128.2
Styrene: 104.15
Butyl methacrylate: 142.2
2-ethylhexyl acrylate: 184.3
Dimethylacrylamide: 99.1
PGM23E: 113.3
IPN50: 2288.8
Ethyl acrylate: 102.1
Acrylic acid: 72.1

In Production Example 1, the theoretical molecular weight of IPN10-Q that is monomer (a) is 678.3, and the theoretical molecular weight of butyl acrylate that is monomer (b) is 128.2. The amount of monomer (a) used is 719.1 × 0.65 = 467.4 g, and the amount of monomer (b) used is 132.5 g. The amount is 467.4 / 678.3 = 0.589, and the molar amount of monomer (b) used is 132.5 / 128.2 = 1.040. Therefore, the molar ratio of monomer (a) to monomer (b) is (a) / (b) = 0.589 / 1.034 = 40/60. Also about the molar ratio of the monomer (a) and the monomer (b) in Production Example 2 to Production Example 13, using the theoretical molecular weight and the usage amount of the monomer (a) and the monomer (b). It can be calculated in the same manner as in Production Example 1.

A mortar test and a concrete test were conducted under the following conditions.
<Mortar test conditions>
All mortar tests were conducted in a 20 ° C. atmosphere using materials adjusted to 20 ° C., and the materials and mortar formulations used in the tests are as follows.

(Contains mortar)
Taiheiyo Cement normal Portland cement 500g, cement strength test standard sand (JIS R5201) 1350g, hydraulic composition additive and polycarboxylic acid-based high performance AE water reducing agent 225g (water / cement ratio) (Mass ratio) = 0.45), and the amount of fine powder component (collected fine particles) or clay (bentonite, kaolinite, allophane) described in Table 2 is included with respect to the above sand. Further, the formulation shown in Table 1 does not contain a fine particle component or clay. In addition, in order to avoid the influence which the bubble in mortar exerts on the fluidity | liquidity of mortar, it adjusted so that air quantity might be 1.0 +/- 0.3% using the commercially available oxyalkylene type antifoamer. As an additive for hydraulic compositions, the additives listed in Tables 1 and 2 were used in an amount of 0.04 wt% with respect to cement. Moreover, 0.08 wt% of water reducing agent (C-1) was used with respect to cement as a polycarboxylic acid type high performance AE water reducing agent.

The fine particle component is a collected fine particle portion obtained by collecting a component of 75 μm or less from Kakegawa produced river sand of the Oi River water system, and a nominal size 75 μm metal sieve passage defined by JIS Z8801-1 was used as the collected fine particle portion.
Moreover, the following commercial item was used for clay.
Bentonite: Kunigel V1 (Kunimine Industry Co., Ltd.)
Kaolinite: RC-1 (manufactured by Takehara Chemical Industry Co., Ltd.)
Allophane: Secard P-1 (manufactured by Shinagawa Kasei)

(Preparation of mortar composition)
When cement, fine particle component or clay is put into a kettle of a Hobart type mortar mixer (model number N-50, manufactured by Hobart), the fine particle component or clay is put in accordance with the composition shown in Table 2, and the additive for hydraulic composition and polycarboxylic acid are added. The time when the ion-exchanged water containing the acid-based high-performance AE water reducing agent was added was set as 0 minutes for the kneading start time, kneaded at low speed for 30 seconds, charged with sand for 30 seconds, and kneaded at high speed for 30 seconds. The mortar was scraped off for 15 seconds, allowed to stand for 1 minute and 15 seconds, and further kneaded at high speed for 1 minute to prepare a mortar.

(Measurement of mortar flow value)
The prepared mortar is filled into a 15 cm mini slump cone (conical cylinder with a lower inner diameter of 10 cm, an upper inner diameter of 5 cm, and a height of 15 cm) placed on a horizontal table until the kneading starts. The long and short diameters of the mortar spread on the table after being gently lifted vertically were measured, and the average value was taken as the mortar flow value.

<Concrete test conditions>
All the concrete tests were performed in a 20 ° C. atmosphere using materials adjusted to 20 ° C., and the materials and concrete blends used in the tests are as follows.

(Concrete mix)
Amount ^{unit, W: 172kg / m 3,} C: 573kg / m 3, G: 866kg / m 3, S: was 765kg / ^{m 3.}
The abbreviations are as follows.
W: Cement admixture, AE agent (air entraining agent), water (tap water)
C: Ordinary Portland cement manufactured by Taiheiyo Cement G: Coarse aggregate, Ome hard sandstone (specific gravity 2.65)
S: Fine aggregate, river sand from Kakegawa (Oigawa water system, specific gravity 2.59)

(Preparation of concrete composition)
The concrete composition was prepared by adjusting the materials used in the test, the forced kneading mixer, and the measuring instruments under a test temperature atmosphere of 20 ° C. so that the test temperature was 20 ° C., and kneading and each measurement were performed at 20 ° C. Was carried out in a temperature atmosphere. In order to avoid the influence of air bubbles in the concrete composition on the fluidity of the concrete composition, a commercially available AE agent (trade name “MA202”, manufactured by Pozoris Co., Ltd.) was used, and the air amount was 1 ± 0.3%. It adjusted so that it might become. As an admixture for a hydraulic composition, a mixture of an additive for a hydraulic composition and a polycarboxylic acid-based high-performance AE water reducing agent was used. Concrete was prepared by kneading for 3 minutes using a forced kneading mixer at 0 minutes. The flow value and the amount of air were measured according to Japanese Industrial Standards (JIS-A-1101, 1128). As an additive for hydraulic compositions, the additives shown in Tables 3 and 4 were used in an amount of 0.02 wt% with respect to cement. Further, as the polycarboxylic acid-based high-performance AE water reducing agent, a water reducing agent (C-2) was used in an amount of 0.18 wt% with respect to cement.

(Compressive strength test method)
Preparation of a specimen for compressive strength test and measurement of compressive strength after 24 hours of the specimen were performed as follows.
Specimen preparation: 100 mm × 200 mm Paper specimen molds 3 each Specimen curing: Temperature 20 ° C., humidity 60%, constant temperature and humidity air curing (after 24 hours)
Specimen polishing: Specimen surface polishing (using a specimen polishing finisher)
Compressive strength measurement: Automatic compressive strength meter (Maekawa Seisakusho)

In the comparative examples, the following additives for hydraulic compositions were used.
p-DADMAC: diallyldimethylammonium chloride polymer (manufactured by Aldrich, weight average molecular weight: less than 100,000 <label indication>)
PD-7: Dimethylamine / epichlorohydrin copolymer (manufactured by Yokkaichi Synthesis Co., Ltd.)

In the mortar test, the fine particle component or clay is blended in an external ratio with respect to the sand. For example, in Example 1-1, since 0.6 wt% of the collected fine particles was added to 1350 g of sand, 1350 × 0.6 / 100 = 8.10 g was used as an extra portion.
On the other hand, the blending of the fine particle component or clay in the concrete test is blended internally with respect to the sand. For example, in Example 2-1, since 2.0 wt% of the collected fine particles are added internally to 23.02 kg of sand, a part of sand using 23.02 × 2.0 / 100 = 0.460 kg. Replaced with

(Evaluation of additive for hydraulic composition)
The effect of the hydraulic composition additive was evaluated by the fluidity fluctuation rate, the fluidity recovery rate, the retainability of the hydraulic composition, and the compressive strength ratio after 24 hours of the cured product of the hydraulic composition.

(1) Fluidity fluctuation rate When the fine particle component or clay is not added, and the flow value when only the water reducing agent is used is Fi, the fine particle component or clay is not added, and the water reducing agent and the additive for the hydraulic composition are used in combination. When the flow value of Fr is Fr, the fluidity fluctuation rate is a numerical value represented by the absolute value of (1-Fr / Fi), and the smaller the fluidity fluctuation rate, the more the presence and amount of fine particles or clay. Regardless, it means that the additive for hydraulic composition has little influence on fluidity and is easy to handle. The evaluation criteria are as follows. The test results are shown in Tables 1 to 4. In Tables 1 to 4, “−” in “Variation rate evaluation” means that it is not subject to evaluation.
Evaluation ◎: Change rate is less than 5% Evaluation ○: Change rate is 5% or more and less than 10% Evaluation △: Change rate is 10% or more and less than 15% Evaluation ×: Change rate is 15% or more

For example, when using the flow value of the reference example 1-1 shown in Table 1 and calculating the fluctuation rate of the reference example 1-1, it becomes | 1-203 / 202 | = 0.00495. can do.

(2) Fluidity recovery rate Fine component or clay not added, flow value when using only water reducing agent is Fi, fine particle component or clay is added, flow value when using only water reducing agent is Fba, fine particle component Alternatively, when the flow value when adding clay and adding the water reducing agent and hydraulic composition additive is Fbr, the fluidity recovery rate is expressed by (Fbr-Fba) / (Fi-Fba). It is a numerical value, and it means that the effect of the additive for hydraulic compositions is so high that a fluid recovery rate is high. The evaluation criteria are as follows. The test results are shown in Tables 2 and 4. In Tables 2 and 4, “-” in “recovery rate evaluation” means that it is not subject to evaluation.
Evaluation ◎: Recovery rate is 80% or more Evaluation ○: Recovery rate is 60% or more and less than 80% Evaluation △: Recovery rate is 40% or more and less than 60% Evaluation ×: Recovery rate is less than 40%

For example, when the recovery rate of Example 1-1 is calculated using the flow values of Reference Example 1-1 and Comparative Example 1-4 shown in Table 2, (192-143) / (202-143) = 0.8305 Therefore, it can be calculated as 83.1%.

(Compressive strength ratio evaluation after 24 hours)
The compressive strength after 24 hours of the cured product of the hydraulic composition when only the water reducing agent is used without adding the fine particle component or clay, the additive for the water reducing agent and the hydraulic composition is added with CSi, the fine particle component or clay. When the compressive strength after 24 hours when CS is used together is CSr, the compressive strength ratio after 24 hours is a numerical value represented by CSr / CSi, and the initial strength is improved as the compressive strength ratio is larger. It means that. The evaluation criteria are as follows. The test results are shown in Table 5.
Evaluation ◎: Compression strength ratio after 24 hours is 1.10 or more Evaluation ○: Compression strength ratio after 24 hours is 1.05 or more and less than 1.10 Evaluation x: Compression strength ratio after 24 hours is less than 1.05

For example, when the compressive strength ratio after 24 hours of the reference example 3-1 and the example 3-1 shown in Table 5 is calculated, 36.8 / 33.3 = 1.105.

(Retention evaluation)
Retention was evaluated by the flow value measured 30 minutes after water injection. The larger the flow value, the better the retention. The evaluation criteria are as follows. The test results are shown in Table 5.
Evaluation: Flow value after 30 minutes is 450 mm or more Evaluation: Flow value after 30 minutes is 400 mm or more and less than 450 mm Evaluation x: Flow value after 30 minutes is less than 400 mm

From Table 2, in the mortar test, in Comparative Examples 1-1 to 1-4 including the fine particle component or clay, the flow value is smaller than that of Reference Example 1-1 including no fine particle component or clay, and includes the fine particle component or clay. It turns out that the fluidity | liquidity of a hydraulic composition falls. On the other hand, in Examples 1-1 to 1-18 in which the polymer satisfying the above (i) to (iii) was used as the additive for the hydraulic composition, a result that the fluidity recovery rate was high was obtained. Moreover, the same result was obtained also in the concrete test from Table 4. Thus, it became clear that the additive for hydraulic compositions of the present invention can improve the fluidity of a hydraulic composition containing a fine particle component and clay.
Among them, as in the copolymers (A-1) to (A-10), when the monomer constituting the polymer does not have a functional group (such as a carboxyl group) that exhibits anionic property under alkaline conditions, It can be seen that since the fluidity recovery rate is high and the fluidity fluctuation rate is small, it is particularly excellent as an additive for hydraulic compositions.

Claims (7)

Addition for hydraulic composition characterized by containing a cationic polymer (A) satisfying the following (i) to (iii) ( excluding a copolymer of the following general formula (a-3-1) and vinylpyrrolidone) Agent.
(I) It has a structure derived from a vinyl monomer (a) having a cationic group and a vinyl monomer (b) having no cationic group.
(Ii) The molar ratio of the monomer (a) to the monomer (b) is (a) / (b) = 1/99 to 95/5.
(Iii) The monomer (a) has the following general formulas (a-1-1) to (a-1-3), (a-2-1), (a-2-2) and (a- 3-1) Any one of the structures.

[X ⁻ in the general formulas (a-1-1) to (a-1-3), (a-2-1), (a-2-2) and (a-3-1) represents a halide ion. Represents a counter anion of any one of sulfate ion, nitrate ion, perchlorate ion, phosphate ion, alkyl sulfate ion and organic acid ion. In (a-1-3) and (a-2-2), n represents the average number of added moles of oxyethylene groups, and is a number from 1 to 500. ] The monomer (b) is in claim 1, characterized in that at least one selected from the group consisting of a monomer represented by the following general formula (b-1) ~ (b -4) The additive for hydraulic compositions described.

[In General Formula (b-1), R ^b1 and R ^b2 may be the same or different and each represents a hydrogen atom or a methyl group. R ^b3 represents an alkyl group having 1 to 18 carbon atoms or a hydroxyalkyl group, or an aryl group having 6 to 18 carbon atoms. Z represents —O— or —N (Y) — (Y represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms or a hydroxyalkyl group, or an aryl group having 6 to 18 carbon atoms). Represent. ]

[In General Formula (b-2), R ^b4 and R ^b5 may be the same or different and each represents a hydrogen atom or a methyl group. R ^b6 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms or a hydroxyalkyl group, or an aryl group having 6 to 18 carbon atoms. ]

[In General Formula (b-3), R ^b7 and R ^b8 may be the same or different and each represents a hydrogen atom or a methyl group. R ^b9 O represents an oxyalkylene group having 2 to 18 carbon atoms and may be the same or different. p1 represents the average addition mole number of an oxyalkylene group, and is a number of 1-500. R ^b10 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. ]

[In General Formula (b-4), R ^b11 and R ^b12 may be the same or different and each represents a hydrogen atom or a methyl group. R ^b13 represents an alkylene group having 1 to 6 carbon atoms or a direct bond. R ^b14 O represents an oxyalkylene group having 2 to 18 carbon atoms and may be the same or different. p2 represents the average addition mole number of an oxyalkylene group, and is a number of 1-500. R ^b15 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. ] The additive for hydraulic composition according to claim 1 or 2, which is used for a hydraulic composition containing a fine particle component having a particle diameter of 75 µm or less. Additive for hydraulic compositions according to claim 1 or 2, characterized in that used in the hydraulic composition comprising a clay component. A hydraulic composition comprising the additive for a hydraulic composition according to any one of claims 1 to 4 and a dispersant for a hydraulic powder (B) for dispersing the hydraulic powder. Admixture for materials. The dispersant for hydraulic powder (B) has a structure derived from a monomer represented by the following general formula (c-1), and the following general formula (c-2) and / or (c-3). The admixture for hydraulic compositions according to claim 5 , comprising a polymer having a structure derived from a monomer represented by:

[In general formula (c-1), R ^c1 and R ^c2 may be the same or different and each represents a hydrogen atom or a methyl group. M represents a hydrogen atom, a metal atom, an ammonium group or an organic amine group. ]

[In General Formula (c-2), R ^c3 and R ^c4 may be the same or different and each represents a hydrogen atom or a methyl group. R ^c5 O represents an oxyalkylene group having 2 to 18 carbon atoms, and may be the same or different. q1 represents the average addition mole number of an oxyalkylene group, and is a number of 1-500. R ^c6 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. ]

[In General Formula (c-3), R ^c7 and R ^c8 may be the same or different and each represents a hydrogen atom or a methyl group. R ^c9 represents an alkylene group having 1 to 6 carbon atoms or a direct bond. R ^c10 O represents an oxyalkylene group having 2 to 18 carbon atoms and may be the same or different. q2 represents the average addition mole number of an oxyalkylene group, and is a number of 1-500. R ^c11 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms. ] A hydraulic composition comprising the additive for hydraulic composition according to any one of claims 1 to 4 , water, hydraulic powder, and aggregate.