WO2020202435A1 - Defoaming agent for hydraulic composition, and hydraulic composition - Google Patents

Defoaming agent for hydraulic composition, and hydraulic composition Download PDF

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Publication number
WO2020202435A1
WO2020202435A1 PCT/JP2019/014477 JP2019014477W WO2020202435A1 WO 2020202435 A1 WO2020202435 A1 WO 2020202435A1 JP 2019014477 W JP2019014477 W JP 2019014477W WO 2020202435 A1 WO2020202435 A1 WO 2020202435A1
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group
hydraulic composition
poly
carbon atoms
adduct
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PCT/JP2019/014477
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French (fr)
Japanese (ja)
Inventor
郁香 村松
内藤 裕樹
伸二 玉木
章宏 古田
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竹本油脂株式会社
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Application filed by 竹本油脂株式会社 filed Critical 竹本油脂株式会社
Priority to JP2021511804A priority Critical patent/JP7191416B2/en
Priority to CN201980093991.3A priority patent/CN113557218A/en
Priority to MYPI2021005133A priority patent/MY197652A/en
Priority to PCT/JP2019/014477 priority patent/WO2020202435A1/en
Priority to TW108114938A priority patent/TW202037635A/en
Publication of WO2020202435A1 publication Critical patent/WO2020202435A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D19/00Degasification of liquids
    • B01D19/02Foam dispersion or prevention
    • B01D19/04Foam dispersion or prevention by addition of chemical substances
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12Nitrogen containing compounds organic derivatives of hydrazine
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24Macromolecular compounds
    • C04B24/28Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/32Polyethers, e.g. alkylphenol polyglycolether
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32Polymers modified by chemical after-treatment
    • C08G65/329Polymers modified by chemical after-treatment with organic compounds
    • C08G65/333Polymers modified by chemical after-treatment with organic compounds containing nitrogen

Definitions

  • the present invention relates to a defoaming agent for a hydraulic composition and a hydraulic composition containing the same. More specifically, the present invention relates to a defoaming agent for a hydraulic composition having high compatibility with an admixture and having excellent defoaming property and bubble stability, and a hydraulic composition containing the same.
  • a hydraulic composition typified by concrete is produced by mixing and stirring cement, water, fine aggregate, coarse aggregate, admixture and the like.
  • the admixture used includes water reduction of lignin sulfonic acid (salt), oxycarboxylic acid (salt), naphthalene sulfonic acid formaldehyde condensate (salt), melamine sulfonic acid formaldehyde condensate (salt), polycarboxylic acid compound and the like.
  • a defoaming agent is often added in order to reduce the coarse air in the water-hard composition generated by entrainment by mixing and stirring, and to adjust the amount of air to an appropriate range.
  • antifoaming agents oxyalkylene-based, silicone-based, alcohol-based, mineral oil-based, fatty acid-based, fatty acid ester-based and the like are known.
  • Patent Document 1 An additive (Patent Document 1) consisting of a mixture of a polycarboxylic acid compound and a specific nitrogen-containing polyoxyalkylene compound, and strength and durability, for the purpose of maintaining a uniform aqueous solution state even when a defoaming agent is blended.
  • Specific polyoxyalkylene compounds have been proposed in order to form a cured product having excellent properties (Patent Documents 2 to 6).
  • JP-A-7-232945 JP-A-10-226550 Japanese Unexamined Patent Publication No. 2003-226565 Japanese Unexamined Patent Publication No. 2003-226566 Japanese Unexamined Patent Publication No. 2003-226567 Japanese Unexamined Patent Publication No. 2003-300766
  • a defoaming agent having high defoaming property has high hydrophobicity, and when blended with an admixture, it separates into the upper part of the admixture over time due to the difference in density, and the amount of air in the hydraulic composition is increased. There was a problem that it was difficult to control it stably.
  • the defoaming agents shown in Patent Documents 1 to 6 are improved in compatibility with the admixture, but have a problem that they cannot have excellent defoaming property and bubble stability at the same time.
  • the defoaming agent for a hydraulic composition of the present invention is for a hydraulic composition having high compatibility with an admixture, excellent defoaming property, and excellent foam stability.
  • An object of the present invention is to provide an antifoaming agent and a hydraulic composition containing the same.
  • a defoaming agent for a hydraulic composition in which a polyoxyalkylene is added to a specific alkylamine at a specific ratio is particularly suitable. ..
  • the following antifoaming agents for hydraulic compositions and hydraulic compositions containing them are provided.
  • a defoaming agent for a hydraulic composition containing a nitrogen-containing polyoxyalkylene compound represented by the following general formula (1) (However, in the formula, R 1 represents an alkyl group or an alkenyl group having 10 to 24 carbon atoms, and R 2 and R 3 are the same or different hydrocarbon groups having a hydrogen atom and / or 1 to 10 carbon atoms.
  • a 1 O and A 2 O represent the same or different oxyalkylene groups having 2 to 4 carbon atoms, and m and n are the same or different integers of 0 to 100 and. The condition of 20 ⁇ m + n ⁇ 100 is satisfied, and the oxyalkylene group having 3 and / or 4 carbon atoms is 65 mol% or more among A 1 O and A 2 O.
  • the A 1 O and the A 2 O are the same or different, and an oxyalkylene group having 2 and / or 3 carbon atoms (provided that at least one of A 1 O and A 2 O has 3 carbon atoms).
  • the antifoaming agent for a hydraulic composition according to any one of the above [1] to [7], which is (including the oxyalkylene group of).
  • the defoaming agent for a hydraulic composition of the present invention there is an effect that the compatibility with the admixture is high, the defoaming property is excellent, and the foam stability can be excellent.
  • the defoaming agent for a hydraulic composition of the present invention contains a nitrogen-containing polyoxyalkylene compound represented by the following general formula (1).
  • R 1 in the general formula (1) is an alkyl group having 10 to 24 carbon atoms or an alkenyl group having 10 to 20 carbon atoms, and may have either a straight chain structure or a branched chain structure. These are not particularly limited, but may be derived from petroleum raw materials, vegetable oils and fats such as palm oil and sunflower oil, and animal fats and oils such as beef tallow.
  • alkyl group having 10 to 24 carbon atoms examples include a decyl group, an undecylic group, a dodecyl group, a tridecylic group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecylic group, an icosyl group, a henicosyl group, and a docosyl group. Examples thereof include a group, a tridecylic group, and a tetracosyl group.
  • an alkyl group having 14 to 18 carbon atoms such as a tetradecyl group, a pentadecyl group, a hexadecyl group, an isohexadecyl group, a heptadecyl group and an octadecyl group is preferable.
  • Alkyl group compounds having R 1 of less than 10 carbon atoms have low defoaming properties and bubble stability, and alkyl group compounds having R 1 having more than 24 carbon atoms have high hydrophobicity and are mixed with admixtures. Compatibility is reduced.
  • alkenyl group having 10 to 24 carbon atoms examples include a decenyl group, an undecenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, a heptadecenyl group, an octadecenyl group, a nonadesenyl group, an icosenyl group, a henicocenyl group, and a docosenyl group.
  • Examples include a group, a tricosenyl group, a tetracosenyl group and the like.
  • an alkenyl group having 14 to 18 carbon atoms such as a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, a heptadecenyl group and an octadecenyl group is preferable.
  • An alkenyl group compound having an R 1 of less than 10 carbon atoms has low defoaming property and bubble stability, and an alkenyl group compound having an R 1 of more than 24 carbon atoms has a high hydrophobicity and is used with an admixture. Compatibility is reduced.
  • R 2 and R 3 in the general formula (1) are the same or different, hydrogen atoms and / or hydrocarbon groups having 1 to 10 carbon atoms.
  • the hydrocarbon group having 1 to 10 carbon atoms may have either a straight chain structure or a branched chain structure, and may be either a saturated hydrocarbon group or an unsaturated hydrocarbon group.
  • Examples of the hydrocarbon group having 1 to 10 carbon atoms include an alkyl group having 1 to 10 carbon atoms and an alkenyl group having 2 to 10 carbon atoms.
  • alkyl group having 1 to 10 carbon atoms examples include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, an isooctyl group, a nonyl group and a decyl group.
  • an alkyl group having 1 to 3 carbon atoms such as a methyl group, an ethyl group and a propyl group is preferable.
  • Alkyl group compounds having R 2 and R 3 having more than 10 carbon atoms have high hydrophobicity and low compatibility with admixtures.
  • the alkenyl group having 2 to 10 carbon atoms include an ethenyl group, a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group and a decenyl group.
  • an alkenyl group having 2 or 3 carbon atoms of an ethenyl group or a propenyl group is preferable.
  • the alkenyl group compound having R 2 and R 3 having more than 10 carbon atoms has high hydrophobicity and low compatibility with the admixture.
  • R 2 and R 3 in the general formula (1) are hydrogen atoms.
  • a 1 O and A 2 O are oxyalkylene groups having the same or different carbon atoms and having 2 to 4 carbon atoms, and examples thereof include an oxyethylene group, an oxypropylene group, and an oxybutylene group.
  • Examples of the oxypropylene group include a 1,2-oxypropylene group and a 1,3-oxypropylene group.
  • Examples of the oxybutylene group include 1,2-oxybutylene group, 1,3-oxybutylene group, 1,4-oxybutylene group, 2,3-oxybutylene group and oxyisobutylene group. It is preferable that A 1 O and A 2 O are the same or different, and are oxyalkylene groups having 2 and / or 3 carbon atoms.
  • At least one of A 1 O and A 2 O contains an oxyalkylene group having 3 carbon atoms.
  • an oxyalkylene group an oxyethylene group and an oxypropylene group are preferable.
  • each of A 1 O and A 2 O is two or more types, it may be in any form of a random adduct, a block adduct, and an alternating adduct.
  • m and n are the same or different, and are integers of 0 to 100, preferably integers of 0 to 80.
  • m and n are integers satisfying the condition of 20 ⁇ m + n ⁇ 100, preferably an integer satisfying the condition of 30 ⁇ m + n ⁇ 80, and more preferably satisfying the condition of 35 ⁇ m + n ⁇ 80. It is an integer.
  • the total of m and n is less than 20, the defoaming property is insufficient and the bubble stability is also lowered. If the total exceeds 100, the production becomes difficult due to the high viscosity, and the compatibility with the admixture becomes insufficient.
  • the oxyalkylene group having 3 and / or 4 carbon atoms in A 1 O and A 2 O is preferably 65 mol% or more. Is 86 mol% or more, more preferably 90 mol% or more.
  • the oxyalkylene group having 3 and / or 4 carbon atoms in A 1 O and A 2 O is less than 65 mol%, the water solubility is excessively increased, so that sufficient defoaming property cannot be obtained and the bubbles are stable. Sex also declines.
  • nitrogen-containing polyoxyalkylene compound represented by the general formula (1) described above examples include decylamine- (poly) oxyethylene / polyoxypropylene adduct and undecylamine- (poly) oxyethylene / polyoxy.
  • Propropylene adduct dodecylamine- (poly) oxyethylene / polyoxypropylene adduct, tridecylamine- (poly) oxyethylene / polyoxypropylene adduct, tetradecylamine- (poly) oxyethylene / polyoxypropylene adduct , Pentadecylamine- (poly) oxyethylene / polyoxypropylene adduct, hexadecylamine- (poly) oxyethylene / polyoxypropylene adduct, 2-hexyldecylamine- (poly) oxyethylene / polyoxypropylene adduct , Heptadecylamine- (poly) oxyethylene / polyoxypropylene adduct, octadecylamine- (poly) oxyethylene / polyoxypropylene adduct, nonadecilamine- (poly) oxyethylene / polyoxypropy
  • tetradecylamine- (poly) oxyethylene / polyoxypropylene adduct pentadecylamine- (poly) oxyethylene / polyoxypropylene adduct, hexadecylamine- (poly) oxyethylene / polyoxypropylene adduct , 2-Hexyldecylamine- (poly) oxyethylene / polyoxypropylene adduct, heptadecylamine- (poly) oxyethylene / polyoxypropylene adduct, octadecylamine- (poly) oxyethylene / polyoxypropylene adduct, Tetradecenylamine- (poly) oxyethylene / polyoxypropylene adduct, pentadecenylamine- (poly) oxyethylene / polyoxypropylene adduct, hexadecenylamine- (poly) oxyethylene /
  • the method for producing the nitrogen-containing polyoxyalkylene compound represented by the general formula (1) is not particularly limited.
  • a method for producing a nitrogen-containing polyoxyalkylene compound represented by the general formula (1) by adding a specific oxyalkylene to a specific alkylamine or a specific alkenylamine can be mentioned.
  • a catalyst when adding oxyalkylene, a catalyst can be used, and as the catalyst, alkali metals and alkaline earth metals, their hydroxides, alkali metal hydrides, alkali catalysts such as alcoholate, and Lewis acids are used. It is possible to use a catalyst or a composite metal catalyst, and preferably an alkaline catalyst can be used.
  • alkaline catalysts examples include sodium, potassium, sodium potassium amalgam, sodium hydroxide, potassium hydroxide, sodium hydride, sodium methoxide, potassium methoxide, sodium ethoxide, potassium ethoxide, potassium butoxide and the like. It can be, preferably sodium hydroxide, potassium hydroxide, sodium methoxide, potassium methoxide, potassium butoxide.
  • Lewis acid catalysts examples include tin tetrachloride, boron trifluoride, boron trifluoride diethyl ether complex, boron trifluoride din-butyl ether complex, boron trifluoride tetrahydrofuran complex, and boron trifluoride phenol.
  • Examples thereof include a complex, a boron trifluoride compound such as a boron trifluoride acetate complex, and the like.
  • catalysts can be neutralized and removed after the addition reaction, while they may be contained as they are.
  • the catalyst can be carried out by a well-known method.
  • the defoaming agent for a hydraulic composition according to the present invention may consist only of a nitrogen-containing polyoxyalkylene compound represented by the general formula (1), as long as the effects of the present invention are not impaired. It may contain any component of. Examples of such optional components include antioxidants, other defoaming agents such as polyoxyalkylene alkyl ether, and diluents such as water and alcohol.
  • the defoaming agent for a hydraulic composition according to the present invention is used for a hydraulic composition containing a hydraulic binder such as civil engineering, construction, and secondary products.
  • the defoaming agent for hydraulic composition according to the present invention can be used in combination with an existing admixture.
  • an admixture include an AE water reducing agent, a high-performance AE water reducing agent, an AE agent, a defoaming agent, a shrinkage reducing agent, a thickener, a curing accelerator and the like.
  • the pH of the admixture used in combination with the defoaming agent for hydraulic composition according to the present invention is preferably 8 or less from the viewpoint of obtaining excellent compatibility with the defoaming agent for hydraulic composition. It is more preferably 6 or less, and further preferably 6 or less.
  • Examples of the water-hardening binder used for preparing the water-hardening composition to which the defoaming agent for the water-hardening composition according to the present invention is used include ordinary Portland cement, early-strength Portland cement, moderate heat Portland cement, low heat Portland cement and the like.
  • various mixed cements such as blast furnace cement, fly ash cement, and silica fume cement can be mentioned.
  • various admixtures such as blast furnace slag fine powder, fly ash, and silica fume may be used alone or in combination with the various cements shown above.
  • fine aggregate and coarse aggregate can be mentioned as fine aggregate
  • river sand, mountain sand, sea sand, crushed sand, slag fine aggregate and the like can be mentioned as fine aggregate
  • coarse aggregate include river gravel, crushed stone, lightweight aggregate, hydraulic slag, and recycled aggregate. These may be used alone or in combination.
  • the ratio of the water binder of the hydraulic composition is not particularly limited. It exhibits a high effect at the ratio of commonly used water binders.
  • the hydraulic composition of the present invention preferably contains the defoaming agent for the hydraulic composition of the present invention in a proportion of 0.0001 to 0.1 parts by mass per 100 parts by mass of the hydraulic binder.
  • the defoaming agent for a hydraulic composition of the present invention is contained in such a ratio, high defoaming property, bubble stability, and high compatibility with an admixture to be used in combination can be exhibited.
  • the number of moles added to the oxyalkylene group represents the average number of moles added, and unless otherwise specified, "parts” means parts by mass and “%” means parts by mass. ..
  • Test Category 1 (Synthesis of Defoamer for Hydraulic Composition) -Synthesis of antifoaming agent (A-1) for hydraulic composition
  • An autoclave was charged with 1347.6 parts of octadecylamine, and the inside of the autoclave was sufficiently replaced with nitrogen.
  • 660.8 parts of ethylene oxide was press-fitted while reacting at 0.4 MPa, and then aged at the same temperature for 0.5 hours.
  • 12 parts of potassium hydroxide powder was added as a catalyst, and then the inside of the autoclave was sufficiently replaced with nitrogen. The temperature was maintained at 150 ° C.
  • reaction system was cooled to 0 ° C., a solution prepared by dissolving 270 parts of octadecylamine in 630 parts of ethanol was gradually added dropwise, and after the addition was completed, the temperature was raised to 40 ° C., aged for 2 hours, purified, and octadecylamine was purified.
  • -A methoxypolyoxyethylene (4 mol) -polyoxypropylene (50 mol) adduct (A-7) was obtained.
  • AR-6 octadecyl alcohol-polyoxyethylene (4 mol) -polyoxypropylene (40 mol) adduct
  • AR-6 was a defoaming agent for hydraulic compositions used as a comparative example.
  • AR-7 was synthesized.
  • AR-7 was a defoaming agent for hydraulic compositions used as a comparative example.
  • AR-8 antifoaming agent for hydraulic composition
  • 750.9 parts of triethylene glycol and 4.7 parts of potassium hydroxide powder were charged in an autoclave, and the inside of the autoclave was sufficiently replaced with nitrogen.
  • 8715 parts of propylene oxide was press-fitted while reacting at 0.4 MPa, and then aged at the same temperature for 1 hour to complete the reaction.
  • the catalyst was removed to obtain a polyoxyethylene (3 mol) -polyoxypropylene (30 mol) condensate (AR-8).
  • AR-8 was a defoaming agent for hydraulic compositions used as a comparative example.
  • AR-6 Octadecyl alcohol-polyoxyethylene (4 mol) / polyoxypropylene (40 mol) adduct
  • AR-7 Dodecyl alcohol-polyoxyethylene (3 mol) / polyoxypropylene (60 mol) adduct
  • AR- 8 Polyoxyethylene (3 mol) / polyoxypropylene (30 mol) adduct
  • Test category 2 Synthesis of polycarboxylic acid-based water reducing agent as an admixture
  • ⁇ - (3-methyl-3-butenyl) - ⁇ -hydroxy-poly (45 mol) oxyethylene was charged into the reaction vessel, and the atmosphere was nitrogen. It was replaced and gradually warmed with stirring.
  • the temperature of the reaction system was kept at 70 ° C. in a warm water bath to stabilize the temperature. Then, acrylic acid was added dropwise over 3 hours.
  • an aqueous solution prepared by dissolving thioglycolic acid and L-ascorbic acid in water and a 5% hydrogen peroxide solution were added dropwise over 3 hours to initiate a radical polymerization reaction.
  • water and a 30% aqueous sodium hydroxide solution were added to the obtained copolymer to obtain a polycarboxylic acid-based water reducing agent (B-1) having a solid content concentration of 25%.
  • this polycarboxylic acid-based water reducing agent was analyzed, the mass average molecular weight was 42000 and the pH was 3.6. The mass average molecular weight of the copolymer was measured by gel permeation chromatography.
  • Ion-exchanged water was added to 1 g of the polycarboxylic acid-based water reducing agent to make 100 g, which was measured at 20 ° C. with a pH meter (manufactured by HORIBA).
  • Table 2 shows the contents of the admixture used.
  • B-4 Polycarboxylic acid compound (High-performance AE water reducing agent for concrete made by Takemoto Oil & Fat, trade name Chupol HP-11)
  • B-5 Complex of modified lignin sulfonic acid compound and polycarboxylic acid compound (AE water reducing agent for concrete made by Takemoto Oil & Fat, trade name Chupol EX60)
  • Test Category 3 (Preparation of admixture composition for evaluation) Defoamers (A-1) to (A-17) and (AR-1) to (AR-8) for hydraulic compositions shown in Table 1 and admixtures (B-1) to (B-1) to (AR-8) shown in Table 2.
  • B-5) was mixed and stirred to prepare an admixture composition for evaluation (125 samples in total). The mixing ratio was 99.5% by mass for the admixtures (B-1) to (B-4), 0.5% by mass for the defoaming agent for the hydraulic composition, and 0.5% by mass for the admixture (B-5). The admixture was 99.7% by mass and the antifoaming agent for hydraulic composition was 0.3% by mass.
  • Test Category 4 (Preparation of Concrete Composition) -Examples 1 to 17 and Comparative Examples 1 to 9 Using a forced twin-screw mixer with a capacity of 60 liters, the concrete compositions of each example were prepared by kneading for 90 seconds according to the contents shown in Table 3. The temperature of the prepared concrete composition was 20 ⁇ 3 ° C.
  • AE-300 (trade name made by Takemoto Oil & Fat) was used as an air amount adjusting agent, and the air amount was 7.0 ⁇ .
  • the amount of the admixture and the admixture composition prepared in Test Category 3 for the concrete composition of each example was adjusted to 1.0%, the slump measured according to JIS A 1150 to 15 ⁇ 2.5 cm. It was constant.
  • Test Category 5 (Test of concrete composition and evaluation of defoamer for hydraulic composition) For each of the prepared concrete compositions, the amount of air was measured as follows, and the compatibility, defoaming property, and bubble stability of the defoaming agent for hydraulic composition with respect to the admixture were evaluated as follows. The results are summarized in Table 4.
  • Air volume (% by volume): The concrete composition immediately after kneading was measured in accordance with JIS A 1128.
  • the amount of air I (% by volume) measured using the above was compared, and the defoaming property was evaluated according to the following criteria.
  • C Bad (the value obtained by subtracting the air volume I from the air volume III is less than 2.0)
  • -Able stability For a concrete composition prepared by using an admixture composition immediately after mixing a defoaming agent for a hydraulic composition, the state of bubbles was visually observed and the bubble stability was evaluated according to the following criteria. .. S: Very good (almost no surface bubble rupture is confirmed) A: Good (very slight rupture of surface bubbles is confirmed) B: Yes (slight bubble rupture of surface bubbles is confirmed) C: Bad
  • AR-6 Octadecyl alcohol-polyoxyethylene (4 mol) / polyoxypropylene (40 mol) adduct
  • AR-7 Dodecyl alcohol-polyoxyethylene (3 mol) / polyoxypropylene (60 mol) adduct
  • AR- 8 Polyoxyethylene (3 mol) / polyoxypropylene (30 mol) adduct
  • the admixture for hydraulic composition of the present invention can be used as a defoaming agent when preparing a hydraulic composition.

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Abstract

Through the present invention, it is possible to provide a defoaming agent for a hydraulic composition, having high compatibility with an admixture as well as excellent defoaming ability and foam stability, and a hydraulic composition. The present invention provides a defoaming agent for a hydraulic composition, the defoaming agent containing a specific nitrogen-containing polyoxyalkylene compound.

Description

水硬性組成物用消泡剤及び水硬性組成物Defoaming agent for hydraulic composition and hydraulic composition
 本発明は、水硬性組成物用消泡剤及びこれを含有する水硬性組成物に関する。更に詳しくは、混和剤との相溶性が高く、優れた消泡性と気泡安定性を有する水硬性組成物用消泡剤及びこれを含有する水硬性組成物に関する。 The present invention relates to a defoaming agent for a hydraulic composition and a hydraulic composition containing the same. More specifically, the present invention relates to a defoaming agent for a hydraulic composition having high compatibility with an admixture and having excellent defoaming property and bubble stability, and a hydraulic composition containing the same.
 コンクリートに代表される水硬性組成物は、セメント、水、細骨材、粗骨材及び混和剤等を混合攪拌し製造される。使用される混和剤には、リグニンスルホン酸(塩)、オキシカルボン酸(塩)、ナフタレンスルホン酸ホルムアルデヒド縮合物(塩)、メラミンスルホン酸ホルムアルデヒド縮合物(塩)、ポリカルボン酸系化合物等の減水成分の他に、混合攪拌による巻き込みにより発生する水硬性組成物中の粗大な空気を減少させたり、空気量を適切な範囲に調整したりするために、消泡剤を配合することが多い。このような消泡剤として、オキシアルキレン系、シリコーン系、アルコール系、鉱油系、脂肪酸系、脂肪酸エステル系等が知られている。 A hydraulic composition typified by concrete is produced by mixing and stirring cement, water, fine aggregate, coarse aggregate, admixture and the like. The admixture used includes water reduction of lignin sulfonic acid (salt), oxycarboxylic acid (salt), naphthalene sulfonic acid formaldehyde condensate (salt), melamine sulfonic acid formaldehyde condensate (salt), polycarboxylic acid compound and the like. In addition to the components, a defoaming agent is often added in order to reduce the coarse air in the water-hard composition generated by entrainment by mixing and stirring, and to adjust the amount of air to an appropriate range. As such antifoaming agents, oxyalkylene-based, silicone-based, alcohol-based, mineral oil-based, fatty acid-based, fatty acid ester-based and the like are known.
 消泡剤を配合しても、均一な水溶液状態を保つ目的で、ポリカルボン酸系化合物と、特定の含窒素ポリオキシアルキレン化合物との混合物からなる添加剤(特許文献1)や、強度及び耐久性に優れた硬化物を形成するために、特定のポリオキシアルキレン系化合物が提案されている(特許文献2~6)。 An additive (Patent Document 1) consisting of a mixture of a polycarboxylic acid compound and a specific nitrogen-containing polyoxyalkylene compound, and strength and durability, for the purpose of maintaining a uniform aqueous solution state even when a defoaming agent is blended. Specific polyoxyalkylene compounds have been proposed in order to form a cured product having excellent properties (Patent Documents 2 to 6).
特開平7-232945号公報JP-A-7-232945 特開平10-226550号公報JP-A-10-226550 特開2003-226565号公報Japanese Unexamined Patent Publication No. 2003-226565 特開2003-226566号公報Japanese Unexamined Patent Publication No. 2003-226566 特開2003-226567号公報Japanese Unexamined Patent Publication No. 2003-226567 特開2003-300766号公報Japanese Unexamined Patent Publication No. 2003-300766
 しかしながら、一般的に高い消泡性を有する消泡剤は疎水性が高く、混和剤と配合した場合、その密度の違いから経時的に混和剤上部に分離し、水硬性組成物の空気量を安定的に制御することが困難であるという問題を生じていた。特許文献1~6に示される消泡剤は、混和剤との相溶性に改善は見られるが、優れた消泡性や気泡安定性を同時に有することができないという問題がある。 However, in general, a defoaming agent having high defoaming property has high hydrophobicity, and when blended with an admixture, it separates into the upper part of the admixture over time due to the difference in density, and the amount of air in the hydraulic composition is increased. There was a problem that it was difficult to control it stably. The defoaming agents shown in Patent Documents 1 to 6 are improved in compatibility with the admixture, but have a problem that they cannot have excellent defoaming property and bubble stability at the same time.
 上記事情に鑑み、本発明の水硬性組成物用消泡剤は、混和剤との相溶性が高く、優れた消泡性を有し、かつ、優れた気泡安定性を有する水硬性組成物用消泡剤及びこれを含有する水硬性組成物の提供を課題とするものである。 In view of the above circumstances, the defoaming agent for a hydraulic composition of the present invention is for a hydraulic composition having high compatibility with an admixture, excellent defoaming property, and excellent foam stability. An object of the present invention is to provide an antifoaming agent and a hydraulic composition containing the same.
 本発明者らは、前記の課題を解決すべく鋭意研究した結果、特定のアルキルアミンに特定の比率でポリオキシアルキレンを付加した水硬性組成物用消泡剤が特に好適であることを見出した。本発明によれば、以下の水硬性組成物用消泡剤及びこれを含有する水硬性組成物が提供される。 As a result of diligent research to solve the above problems, the present inventors have found that a defoaming agent for a hydraulic composition in which a polyoxyalkylene is added to a specific alkylamine at a specific ratio is particularly suitable. .. According to the present invention, the following antifoaming agents for hydraulic compositions and hydraulic compositions containing them are provided.
[1] 下記一般式(1)で表される含窒素ポリオキシアルキレン化合物を含有する水硬性組成物用消泡剤。
Figure JPOXMLDOC01-appb-C000002
(但し、式中、Rは、炭素数10~24のアルキル基又はアルケニル基を示し、R及びRは、同一又は異なって、水素原子及び/又は炭素数1~10の炭化水素基を示し、AO及びAOは、同一又は異なって、炭素数2~4のオキシアルキレン基を示し、m及びnは、同一又は異なって、0~100の整数であって、かつ、20≦m+n≦100の条件を満たし、AO及びAOの内、炭素数3及び/又は4のオキシアルキレン基が65モル%以上である。)
[1] A defoaming agent for a hydraulic composition containing a nitrogen-containing polyoxyalkylene compound represented by the following general formula (1).
Figure JPOXMLDOC01-appb-C000002
(However, in the formula, R 1 represents an alkyl group or an alkenyl group having 10 to 24 carbon atoms, and R 2 and R 3 are the same or different hydrocarbon groups having a hydrogen atom and / or 1 to 10 carbon atoms. A 1 O and A 2 O represent the same or different oxyalkylene groups having 2 to 4 carbon atoms, and m and n are the same or different integers of 0 to 100 and. The condition of 20 ≦ m + n ≦ 100 is satisfied, and the oxyalkylene group having 3 and / or 4 carbon atoms is 65 mol% or more among A 1 O and A 2 O.)
[2] 前記AO及び前記AOの内、炭素数3及び/又は4のオキシアルキレン基が86モル%以上である前記[1]に記載の水硬性組成物用消泡剤。 [2] The defoaming agent for a hydraulic composition according to the above [1], wherein the oxyalkylene group having 3 and / or 4 carbon atoms in the A 1 O and the A 2 O is 86 mol% or more.
[3] 前記AO及び前記AOの内、炭素数3及び/又は4のオキシアルキレン基が90モル%以上である前記[1]に記載の水硬性組成物用消泡剤。 [3] The antifoaming agent for a hydraulic composition according to the above [1], wherein the oxyalkylene group having 3 and / or 4 carbon atoms in the A 1 O and the A 2 O is 90 mol% or more.
[4] 前記m、前記nは、同一又は異なって、0~80の整数であって、かつ、30≦m+n≦80の条件を満たす前記[1]~[3]のいずれかに記載の水硬性組成物用消泡剤。 [4] The water according to any one of [1] to [3], wherein m and n are the same or different, are integers of 0 to 80, and satisfy the condition of 30 ≦ m + n ≦ 80. Defoaming agent for rigid compositions.
[5] 前記m、前記nは、同一又は異なって、0~80の整数であって、かつ、35≦m+n≦80の条件を満たす前記[1]~[3]のいずれかに記載の水硬性組成物用消泡剤。 [5] The water according to any one of [1] to [3], wherein m and n are the same or different, are integers of 0 to 80, and satisfy the condition of 35 ≦ m + n ≦ 80. Defoaming agent for rigid compositions.
[6] 前記R及びRは、水素原子を示す前記[1]~[5]のいずれかに記載の水硬性組成物用消泡剤。 [6] The defoaming agent for a hydraulic composition according to any one of [1] to [5] above, wherein R 2 and R 3 represent hydrogen atoms.
[7] 前記Rは、炭素数14~18のアルキル基又はアルケニル基を示す前記[1]~[6]のいずれかに記載の水硬性組成物用消泡剤。 [7] The defoaming agent for a hydraulic composition according to any one of the above [1] to [6], wherein R 1 represents an alkyl group or an alkenyl group having 14 to 18 carbon atoms.
[8] 前記AO及び前記AOは、同一または異なって、炭素数2及び/又は3のオキシアルキレン基(但し、AO及びAOのうちの少なくとも1つは炭素数3のオキシアルキレン基を含む)である前記[1]~[7]のいずれかに記載の水硬性組成物用消泡剤。 [8] The A 1 O and the A 2 O are the same or different, and an oxyalkylene group having 2 and / or 3 carbon atoms (provided that at least one of A 1 O and A 2 O has 3 carbon atoms). The antifoaming agent for a hydraulic composition according to any one of the above [1] to [7], which is (including the oxyalkylene group of).
[9] 前記[1]~[8]のいずれかに記載の水硬性組成物用消泡剤を含有する水硬性組成物。 [9] A hydraulic composition containing the antifoaming agent for a hydraulic composition according to any one of the above [1] to [8].
[10] pHが8以下である混和剤を含有する前記[9]に記載の水硬性組成物。 [10] The hydraulic composition according to the above [9], which contains an admixture having a pH of 8 or less.
 本発明の水硬性組成物用消泡剤によれば、混和剤との相溶性が高く、優れた消泡性を有し、かつ、優れた気泡安定性を有することができるという効果がある。 According to the defoaming agent for a hydraulic composition of the present invention, there is an effect that the compatibility with the admixture is high, the defoaming property is excellent, and the foam stability can be excellent.
 以下、本発明の実施形態について説明する。しかし、本発明は以下の実施形態に限定されるものではない。したがって、本発明の趣旨を逸脱しない範囲で、当業者の通常の知識に基づいて、以下の実施形態に対し適宜変更、改良等が加えられ得ることが理解されるべきである。なお、以下の実施例等において、別に記載しない限り、%は質量%を、また部は質量部を意味する。 Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the following embodiments. Therefore, it should be understood that the following embodiments can be appropriately modified, improved, or the like based on the ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. In the following examples and the like, unless otherwise specified,% means mass% and parts means parts by mass.
 本発明の水硬性組成物用消泡剤は、下記一般式(1)で表される含窒素ポリオキシアルキレン化合物を含有する。
Figure JPOXMLDOC01-appb-C000003
The defoaming agent for a hydraulic composition of the present invention contains a nitrogen-containing polyoxyalkylene compound represented by the following general formula (1).
Figure JPOXMLDOC01-appb-C000003
 一般式(1)中のRは、炭素数10~24のアルキル基又は炭素数10~20のアルケニル基であり、直鎖、分岐鎖のいずれの構造を有するものであってもよい。これらは、特に限定されるものではないが、例えば、石油原料由来や、パーム油やひまわり油などの植物性油脂由来であってもよく、牛脂など動物性油脂由来であっても構わない。 R 1 in the general formula (1) is an alkyl group having 10 to 24 carbon atoms or an alkenyl group having 10 to 20 carbon atoms, and may have either a straight chain structure or a branched chain structure. These are not particularly limited, but may be derived from petroleum raw materials, vegetable oils and fats such as palm oil and sunflower oil, and animal fats and oils such as beef tallow.
 炭素数10~24のアルキル基としては、例えば、デシル基、ウンデシル基、ドデシル基、トリデシル基、テトラデシル基、ペンタデシル基、ヘキサデシル基、ヘプタデシル基、オクタデシル基、ノナデシル基、イコシル基、ヘンイコシル基、ドコシル基、トリコシル基、テトラコシル基等が挙げられる。なかでも、このようなアルキル基としては、テトラデシル基、ペンタデシル基、ヘキサデシル基、イソヘキサデシル基、ヘプタデシル基、オクタデシル基等の炭素数14~18のアルキル基が好ましい。なお、Rが10に満たない炭素数のアルキル基の化合物は消泡性や気泡安定性が低く、Rが24を超える炭素数のアルキル基の化合物は、疎水性が高く混和剤との相溶性が低下する。 Examples of the alkyl group having 10 to 24 carbon atoms include a decyl group, an undecylic group, a dodecyl group, a tridecylic group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecylic group, an icosyl group, a henicosyl group, and a docosyl group. Examples thereof include a group, a tridecylic group, and a tetracosyl group. Among them, as such an alkyl group, an alkyl group having 14 to 18 carbon atoms such as a tetradecyl group, a pentadecyl group, a hexadecyl group, an isohexadecyl group, a heptadecyl group and an octadecyl group is preferable. Alkyl group compounds having R 1 of less than 10 carbon atoms have low defoaming properties and bubble stability, and alkyl group compounds having R 1 having more than 24 carbon atoms have high hydrophobicity and are mixed with admixtures. Compatibility is reduced.
 炭素数10~24のアルケニル基としては、例えば、デセニル基、ウンデセニル基、ドデセニル基、トリデセニル基、テトラデセニル基、ペンタデセニル基、ヘキサデセニル基、ヘプタデセニル基、オクタデセニル基、ノナデセニル基、イコセニル基、ヘンイコセニル基、ドコセニル基、トリコセニル基、テトラコセニル基等が挙げられる。なかでも、このようなアルケニル基としては、テトラデセニル基、ペンタデセニル基、ヘキサデセニル基、ヘプタデセニル基、オクタデセニル基等の炭素数14~18のアルケニル基が好ましい。なお、Rが10に満たない炭素数のアルケニル基の化合物は消泡性や気泡安定性が低く、Rが24を超える炭素数のアルケニル基の化合物は、疎水性が高く混和剤との相溶性が低下する。 Examples of the alkenyl group having 10 to 24 carbon atoms include a decenyl group, an undecenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, a heptadecenyl group, an octadecenyl group, a nonadesenyl group, an icosenyl group, a henicocenyl group, and a docosenyl group. Examples include a group, a tricosenyl group, a tetracosenyl group and the like. Among them, as such an alkenyl group, an alkenyl group having 14 to 18 carbon atoms such as a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, a heptadecenyl group and an octadecenyl group is preferable. An alkenyl group compound having an R 1 of less than 10 carbon atoms has low defoaming property and bubble stability, and an alkenyl group compound having an R 1 of more than 24 carbon atoms has a high hydrophobicity and is used with an admixture. Compatibility is reduced.
 一般式(1)中のR及びRは、同一又は異なって、水素原子及び/又は炭素数1~10の炭化水素基である。 R 2 and R 3 in the general formula (1) are the same or different, hydrogen atoms and / or hydrocarbon groups having 1 to 10 carbon atoms.
 炭素数1~10の炭化水素基としては、直鎖、分岐鎖のいずれの構造を有するものであってもよく、飽和炭化水素基、不飽和炭化水素基のいずれであってもよい。炭素数1~10の炭化水素基としては、例えば、炭素数1~10のアルキル基又は炭素数2~10のアルケニル基が挙げられる。炭素数1~10のアルキル基としては、例えば、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、イソオクチル基、ノニル基、デシル基等が挙げられる。なかでも、このようなアルキル基としては、メチル基、エチル基、プロピル基等の炭素数1~3のアルキル基が好ましい。なお、R及びRが10を超える炭素数のアルキル基の化合物は、疎水性が高く混和剤との相溶性が低下する。また、炭素数2~10のアルケニル基としては、エテニル基、プロペニル基、ブテニル基、ペンテニル基、ヘキセニル基、ヘプテニル基、オクテニル基、ノネニル基、デセニル基等が挙げられる。なかでも、このようなアルケニル基としては、エテニル基、プロペニル基の炭素数2及び3のアルケニル基が好ましい。なお、R及びRが10を超える炭素数のアルケニル基の化合物は、疎水性が高く混和剤との相溶性が低下する。 The hydrocarbon group having 1 to 10 carbon atoms may have either a straight chain structure or a branched chain structure, and may be either a saturated hydrocarbon group or an unsaturated hydrocarbon group. Examples of the hydrocarbon group having 1 to 10 carbon atoms include an alkyl group having 1 to 10 carbon atoms and an alkenyl group having 2 to 10 carbon atoms. Examples of the alkyl group having 1 to 10 carbon atoms include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, an isooctyl group, a nonyl group and a decyl group. Can be mentioned. Among them, as such an alkyl group, an alkyl group having 1 to 3 carbon atoms such as a methyl group, an ethyl group and a propyl group is preferable. Alkyl group compounds having R 2 and R 3 having more than 10 carbon atoms have high hydrophobicity and low compatibility with admixtures. Examples of the alkenyl group having 2 to 10 carbon atoms include an ethenyl group, a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group and a decenyl group. Among them, as such an alkenyl group, an alkenyl group having 2 or 3 carbon atoms of an ethenyl group or a propenyl group is preferable. The alkenyl group compound having R 2 and R 3 having more than 10 carbon atoms has high hydrophobicity and low compatibility with the admixture.
 なお、一般式(1)中のR及びRは、水素原子であるのが好ましい。 It is preferable that R 2 and R 3 in the general formula (1) are hydrogen atoms.
 一般式(1)において、AO及びAOは、同一又は異なる、炭素数2~4のオキシアルキレン基であり、オキシエチレン基、オキシプロピレン基、オキシブチレン基が挙げられる。オキシプロピレン基としては、1,2-オキシプロピレン基、1,3-オキシプロピレン基が挙げられる。オキシブチレン基としては、1,2-オキシブチレン基、1,3-オキシブチレン基、1,4-オキシブチレン基、2,3-オキシブチレン基、オキシイソブチレン基が挙げられる。AO及びAOは、同一又は異なって、炭素数2及び/又は3のオキシアルキレン基であることが好ましい。但し、この場合、AO及びAOのうちの少なくとも1つは炭素数3のオキシアルキレン基を含む。このようなオキシアルキレン基としては、オキシエチレン基、オキシプロピレン基が好ましい。AO及びAOのそれぞれが2種類以上の場合は、ランダム付加体、ブロック付加体、交互付加体のいずれの形態であってもよい。 In the general formula (1), A 1 O and A 2 O are oxyalkylene groups having the same or different carbon atoms and having 2 to 4 carbon atoms, and examples thereof include an oxyethylene group, an oxypropylene group, and an oxybutylene group. Examples of the oxypropylene group include a 1,2-oxypropylene group and a 1,3-oxypropylene group. Examples of the oxybutylene group include 1,2-oxybutylene group, 1,3-oxybutylene group, 1,4-oxybutylene group, 2,3-oxybutylene group and oxyisobutylene group. It is preferable that A 1 O and A 2 O are the same or different, and are oxyalkylene groups having 2 and / or 3 carbon atoms. However, in this case, at least one of A 1 O and A 2 O contains an oxyalkylene group having 3 carbon atoms. As such an oxyalkylene group, an oxyethylene group and an oxypropylene group are preferable. When each of A 1 O and A 2 O is two or more types, it may be in any form of a random adduct, a block adduct, and an alternating adduct.
 一般式(1)において、mはAOの付加モル数を表し、nは、AOの付加モル数を表す。m及びnは、同一又は異なり、0~100の整数であり、好ましくは0~80の整数である。また同時に、m及びnは、20≦m+n≦100の条件を満たす整数であり、好ましくは、30≦m+n≦80の条件を満たす整数であり、より好ましくは、35≦m+n≦80の条件を満たす整数である。m及びnの合計が20に満たない場合、消泡性が不十分であり、気泡安定性も低下する。合計が100を超えると高粘度のため製造が困難となり、また、混和剤との相溶性も不十分となる。 In the general formula (1), m represents the number of added moles of A 1 O, and n represents the number of added moles of A 2 O. m and n are the same or different, and are integers of 0 to 100, preferably integers of 0 to 80. At the same time, m and n are integers satisfying the condition of 20 ≦ m + n ≦ 100, preferably an integer satisfying the condition of 30 ≦ m + n ≦ 80, and more preferably satisfying the condition of 35 ≦ m + n ≦ 80. It is an integer. When the total of m and n is less than 20, the defoaming property is insufficient and the bubble stability is also lowered. If the total exceeds 100, the production becomes difficult due to the high viscosity, and the compatibility with the admixture becomes insufficient.
 また、優れた消泡性を得るためには、一般式(1)において、AO及びAOの内、炭素数3及び/又は4のオキシアルキレン基が65モル%以上であり、好ましくは86モル%以上であり、より好ましくは90モル%以上である。AO及びAOの内、炭素数3及び/又は4のオキシアルキレン基が65モル%未満の場合は、水溶性が過剰に高まるため、十分な消泡性が得られず、気泡安定性も低下する。 Further, in order to obtain excellent defoaming property, in the general formula (1), the oxyalkylene group having 3 and / or 4 carbon atoms in A 1 O and A 2 O is preferably 65 mol% or more. Is 86 mol% or more, more preferably 90 mol% or more. When the oxyalkylene group having 3 and / or 4 carbon atoms in A 1 O and A 2 O is less than 65 mol%, the water solubility is excessively increased, so that sufficient defoaming property cannot be obtained and the bubbles are stable. Sex also declines.
 以上説明した一般式(1)で表される含窒素ポリオキシアルキレン化合物の具体例としては、デシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ウンデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ドデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、トリデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、テトラデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ペンタデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘキサデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、2-ヘキシルデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘプタデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、オクタデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ノナデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、イコシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘンイコシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ドコシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、トリコシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、テトラコシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、デセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ウンデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ドデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、トリデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、テトラデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ペンタデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘキサデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘプタデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、オクタデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ノナデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、イコセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘンイコセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ドコセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、トリコセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、テトラコセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、牛脂アミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、硬化牛脂アミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、テトラデシルアミン-ポリオキシプロピレン付加物、ペンタデシルアミン-ポリオキシプロピレン付加物、ヘキサデシルアミン-ポリオキシプロピレン付加物、2-ヘキシルデシルアミン-ポリオキシプロピレン付加物、ヘプタデシルアミン-ポリオキシプロピレン付加物、オクタデシルアミン-ポリオキシプロピレン付加物、テトラデセニルアミン-ポリオキシプロピレン付加物、ペンタデセニルアミン-ポリオキシプロピレン付加物、ヘキサデセニルアミン-ポリオキシプロピレン付加物、ヘプタデセニルアミン-ポリオキシプロピレン付加物、オクタデセニルアミン-ポリオキシプロピレン付加物、牛脂アミン-ポリオキシプロピレン付加物、硬化牛脂アミン-ポリオキシプロピレン付加物、テトラデシルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、ペンタデシルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、ヘキサデシルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、2-ヘキシルデシルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、ヘプタデシルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、オクタデシルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、テトラデセニルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、ペンタデセニルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、ヘキサデセニルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、ヘプタデセニルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、オクタデセニルアミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、牛脂アミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物、硬化牛脂アミン-(ポリ)オキシエチレン・(ポリ)オキシプロピレン・(ポリ)オキシブチレン付加物等が挙げられる。なかでも、テトラデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ペンタデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘキサデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、2-ヘキシルデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘプタデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、オクタデシルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、テトラデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ペンタデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘキサデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、ヘプタデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、オクタデセニルアミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、牛脂アミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物、硬化牛脂アミン-(ポリ)オキシエチレン・ポリオキシプロピレン付加物等が好ましい。 Specific examples of the nitrogen-containing polyoxyalkylene compound represented by the general formula (1) described above include decylamine- (poly) oxyethylene / polyoxypropylene adduct and undecylamine- (poly) oxyethylene / polyoxy. Propropylene adduct, dodecylamine- (poly) oxyethylene / polyoxypropylene adduct, tridecylamine- (poly) oxyethylene / polyoxypropylene adduct, tetradecylamine- (poly) oxyethylene / polyoxypropylene adduct , Pentadecylamine- (poly) oxyethylene / polyoxypropylene adduct, hexadecylamine- (poly) oxyethylene / polyoxypropylene adduct, 2-hexyldecylamine- (poly) oxyethylene / polyoxypropylene adduct , Heptadecylamine- (poly) oxyethylene / polyoxypropylene adduct, octadecylamine- (poly) oxyethylene / polyoxypropylene adduct, nonadecilamine- (poly) oxyethylene / polyoxypropylene adduct, icosylamine- (poly) ) Oxyethylene / polyoxypropylene adduct, henicosylamine- (poly) oxyethylene / polyoxypropylene adduct, docosylamine- (poly) oxyethylene / polyoxypropylene adduct, tricosylamine- (poly) oxyethylene Polyoxypropylene adduct, tetracosylamine- (poly) oxyethylene / polyoxypropylene adduct, decenylamine- (poly) oxyethylene / polyoxypropylene adduct, undecenylamine- (poly) oxyethylene / polyoxypropylene adduct Dodecenylamine- (poly) oxyethylene / polyoxypropylene adduct, tridecenylamine- (poly) oxyethylene / polyoxypropylene adduct, tetradecenylamine- (poly) oxyethylene / polyoxypropylene adduct, penta Decenylamine- (poly) oxyethylene / polyoxypropylene adduct, hexadecenylamine- (poly) oxyethylene / polyoxypropylene adduct, heptadecenylamine- (poly) oxyethylene / polyoxypropylene adduct, Octadecenylamine- (poly) oxyethylene / polyoxypropylene adduct, nonadecenylamine- (poly) oxyethylene / polyoxypropylene adduct, icosenylamine- (poly) oxyethylene / polyoxypropi Lene adduct, henicosenylamine- (poly) oxyethylene / polyoxypropylene adduct, docosenylamine- (poly) oxyethylene / polyoxypropylene adduct, tricosenylamine- (poly) oxyethylene / polyoxypropylene adduct , Tetracosenylamine- (poly) oxyethylene / polyoxypropylene adduct, beef aminium- (poly) oxyethylene / polyoxypropylene adduct, cured beef amin- (poly) oxyethylene / polyoxypropylene adduct, tetra Decylamine-polyoxypropylene adduct, pentadecylamine-polyoxypropylene adduct, hexadecylamine-polyoxypropylene adduct, 2-hexyldecylamine-polyoxypropylene adduct, heptadecylamine-polyoxypropylene adduct , Octadecylamine-polyoxypropylene adduct, tetradecenylamine-polyoxypropylene adduct, pentadecenylamine-polyoxypropylene adduct, hexadecenylamine-polyoxypropylene adduct, heptadecenylamine-polyoxy Propropylene adduct, octadecenylamine-polyoxypropylene adduct, beef fat amine-polyoxypropylene adduct, hardened beef amin-polyoxypropylene adduct, tetradecylamine- (poly) oxyethylene, (poly) oxypropylene (Poly) oxybutylene adduct, pentadecylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) oxybutylene adduct, hexadecylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) ) Oxybutylene adduct, 2-hexyldecylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) oxybutylene adduct, heptadecylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) ) Oxybutylene adduct, octadecylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) oxybutylene adduct, tetradecenylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) oxy Butylene adduct, pentadecenylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) oxybutylene adduct, hexadecenylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) oxy Butylene adduct, heptadecenylamine- Li) Oxyethylene, (poly) oxypropylene, (poly) oxybutylene adduct, octadecenylamine- (poly) oxyethylene, (poly) oxypropylene, (poly) oxybutylene adduct, beef fat amine- (poly) Examples thereof include oxyethylene, (poly) oxypropylene, (poly) oxybutylene adduct, cured beef adduct amine- (poly) oxyethylene, (poly) oxypropylene, and (poly) oxybutylene adduct. Among them, tetradecylamine- (poly) oxyethylene / polyoxypropylene adduct, pentadecylamine- (poly) oxyethylene / polyoxypropylene adduct, hexadecylamine- (poly) oxyethylene / polyoxypropylene adduct , 2-Hexyldecylamine- (poly) oxyethylene / polyoxypropylene adduct, heptadecylamine- (poly) oxyethylene / polyoxypropylene adduct, octadecylamine- (poly) oxyethylene / polyoxypropylene adduct, Tetradecenylamine- (poly) oxyethylene / polyoxypropylene adduct, pentadecenylamine- (poly) oxyethylene / polyoxypropylene adduct, hexadecenylamine- (poly) oxyethylene / polyoxypropylene adduct , Heptadecenylamine- (poly) oxyethylene / polyoxypropylene adduct, octadecenylamine- (poly) oxyethylene / polyoxypropylene adduct, beef fat amine- (poly) oxyethylene / polyoxypropylene adduct, Hardened beef fat amine- (poly) oxyethylene, polyoxypropylene adduct and the like are preferable.
 一般式(1)で表される含窒素ポリオキシアルキレン化合物の製造方法は特に限定されない。例えば、特定のアルキルアミン又は特定のアルケニルアミンに特定のオキシアルキレンを付加させることにより一般式(1)で表される含窒素ポリオキシアルキレン化合物を製造する方法が挙げられる。 The method for producing the nitrogen-containing polyoxyalkylene compound represented by the general formula (1) is not particularly limited. For example, a method for producing a nitrogen-containing polyoxyalkylene compound represented by the general formula (1) by adding a specific oxyalkylene to a specific alkylamine or a specific alkenylamine can be mentioned.
 ここで、オキシアルキレンを付加させる際には、触媒を用いることができ、触媒としては、アルカリ金属およびアルカリ土類金属やそれらの水酸化物、アルカリ金属水素化物、アルコラート等のアルカリ触媒やルイス酸触媒、複合金属触媒を用いることが可能であり、好ましくはアルカリ触媒を用いることができる。 Here, when adding oxyalkylene, a catalyst can be used, and as the catalyst, alkali metals and alkaline earth metals, their hydroxides, alkali metal hydrides, alkali catalysts such as alcoholate, and Lewis acids are used. It is possible to use a catalyst or a composite metal catalyst, and preferably an alkaline catalyst can be used.
 使用可能なアルカリ触媒としては、例えば、ナトリウム、カリウム、ナトリウムカリウムアマルガム、水酸化ナトリウム、水酸化カリウム、ナトリウムハイドライド、ナトリウムメトキシド、カリウムメトキシド、ナトリウムエトキシド、カリウムエトキシド、カリウムブトキシド等を挙げることができ、好ましくは水酸化ナトリウム、水酸化カリウム、ナトリウムメトキシド、カリウムメトキシド、カリウムブトキシドである。 Examples of alkaline catalysts that can be used include sodium, potassium, sodium potassium amalgam, sodium hydroxide, potassium hydroxide, sodium hydride, sodium methoxide, potassium methoxide, sodium ethoxide, potassium ethoxide, potassium butoxide and the like. It can be, preferably sodium hydroxide, potassium hydroxide, sodium methoxide, potassium methoxide, potassium butoxide.
 使用可能なルイス酸触媒としては、例えば、四塩化錫、三フッ化ホウ素、三フッ化ホウ素ジエチルエーテル錯体、三フッ化ホウ素ジn-ブチルエーテル錯体、三フッ化ホウ素テトラヒドロフラン錯体、三フッ化ホウ素フェノール錯体、三フッ化ホウ素酢酸錯体等の三フッ化ホウ素化合物等が挙げられる。 Examples of Lewis acid catalysts that can be used include tin tetrachloride, boron trifluoride, boron trifluoride diethyl ether complex, boron trifluoride din-butyl ether complex, boron trifluoride tetrahydrofuran complex, and boron trifluoride phenol. Examples thereof include a complex, a boron trifluoride compound such as a boron trifluoride acetate complex, and the like.
 これらの触媒は、付加反応後に中和し、除去することも可能であり、一方、そのまま含有したままにしても構わない。触媒を中和する場合は、周知の方法により行うことが可能である。 These catalysts can be neutralized and removed after the addition reaction, while they may be contained as they are. When the catalyst is neutralized, it can be carried out by a well-known method.
 本発明に係る水硬性組成物用消泡剤は、一般式(1)で表される含窒素ポリオキシアルキレン化合物のみからなるものであってもよく、本発明の効果を損なわないのであれば他の任意成分を含んでいてもよい。このような任意成分として酸化防止剤、ポリオキシアルキレンアルキルエーテル等のその他の消泡剤および水、アルコール等の希釈剤等が挙げられる。 The defoaming agent for a hydraulic composition according to the present invention may consist only of a nitrogen-containing polyoxyalkylene compound represented by the general formula (1), as long as the effects of the present invention are not impaired. It may contain any component of. Examples of such optional components include antioxidants, other defoaming agents such as polyoxyalkylene alkyl ether, and diluents such as water and alcohol.
 本発明に係る水硬性組成物用消泡剤は、土木、建築、二次製品等の水硬性結合材を含有する水硬性組成物に使用されるものである。 The defoaming agent for a hydraulic composition according to the present invention is used for a hydraulic composition containing a hydraulic binder such as civil engineering, construction, and secondary products.
 本発明に係る水硬性組成物用消泡剤は既存の混和剤と併用することができる。かかる混和剤としては、AE減水剤、高性能AE減水剤、AE剤、消泡剤、収縮低減剤、増粘剤、硬化促進剤等が挙げられる。 The defoaming agent for hydraulic composition according to the present invention can be used in combination with an existing admixture. Examples of such an admixture include an AE water reducing agent, a high-performance AE water reducing agent, an AE agent, a defoaming agent, a shrinkage reducing agent, a thickener, a curing accelerator and the like.
 本発明に係る水硬性組成物用消泡剤と併用する混和剤は、水硬性組成物用消泡剤との優れた相溶性を得る観点から、そのpHが8以下であるのが好ましく、7以下であるのがより好ましく、更に好ましくは6以下である。 The pH of the admixture used in combination with the defoaming agent for hydraulic composition according to the present invention is preferably 8 or less from the viewpoint of obtaining excellent compatibility with the defoaming agent for hydraulic composition. It is more preferably 6 or less, and further preferably 6 or less.
 本発明に係る水硬性組成物用消泡剤の使用対象となる水硬性組成物の調製に用いる水硬性結合材としては、普通ポルトランドセメント、早強ポルトランドセメント、中庸熱ポルトランドセメント、低熱ポルトランドセメント等の各種ポルトランドセメントの他に、高炉セメント、フライアッシュセメント、シリカフュームセメント等の各種混合セメントが挙げられる。また、高炉スラグ微粉末、フライアッシュ、シリカフュームなどの各種混和材を単独で、又は先に示した各種セメントと併用してもよい。 Examples of the water-hardening binder used for preparing the water-hardening composition to which the defoaming agent for the water-hardening composition according to the present invention is used include ordinary Portland cement, early-strength Portland cement, moderate heat Portland cement, low heat Portland cement and the like. In addition to various Portland cements, various mixed cements such as blast furnace cement, fly ash cement, and silica fume cement can be mentioned. In addition, various admixtures such as blast furnace slag fine powder, fly ash, and silica fume may be used alone or in combination with the various cements shown above.
 また水硬性組成物の調製に骨材を用いる場合の骨材としては細骨材や粗骨材が挙げられ、細骨材としては川砂、山砂、海砂、砕砂、スラグ細骨材等が挙げられ、粗骨材としては川砂利、砕石、軽量骨材、水砕スラグ、再生骨材等が挙げられる。これらは、単独、又は併用して用いてもよい。 When aggregate is used for preparing a hydraulic composition, fine aggregate and coarse aggregate can be mentioned as fine aggregate, and river sand, mountain sand, sea sand, crushed sand, slag fine aggregate and the like can be mentioned as fine aggregate. Examples of coarse aggregate include river gravel, crushed stone, lightweight aggregate, hydraulic slag, and recycled aggregate. These may be used alone or in combination.
 更に水硬性組成物の水結合材比は、特に限定されない。一般的に使用される水結合材比において、高い効果を発現する。 Furthermore, the ratio of the water binder of the hydraulic composition is not particularly limited. It exhibits a high effect at the ratio of commonly used water binders.
 本発明の水硬性組成物は、水硬性結合材100質量部当たり、本発明の水硬性組成物用消泡剤を0.0001~0.1質量部の割合で含有することが好ましい。このような割合で本発明の水硬性組成物用消泡剤を含有すると、高い消泡性や気泡安定性、併用する混和剤への高い相溶性を発揮することができる。 The hydraulic composition of the present invention preferably contains the defoaming agent for the hydraulic composition of the present invention in a proportion of 0.0001 to 0.1 parts by mass per 100 parts by mass of the hydraulic binder. When the defoaming agent for a hydraulic composition of the present invention is contained in such a ratio, high defoaming property, bubble stability, and high compatibility with an admixture to be used in combination can be exhibited.
 以下、本発明の構成及び効果をより具体的にするため、実施例等を挙げるが、本発明がこれらの実施例に限定されるというものではない。なお、以下の実施例及び比較例において、オキシアルキレン基の付加モル数は平均付加モル数を表し、また、特に断りのない限り、“部”は質量部、“%”は質量%を意味する。 Hereinafter, examples and the like will be given in order to make the configuration and effect of the present invention more specific, but the present invention is not limited to these examples. In the following Examples and Comparative Examples, the number of moles added to the oxyalkylene group represents the average number of moles added, and unless otherwise specified, "parts" means parts by mass and "%" means parts by mass. ..
 試験区分1(水硬性組成物用消泡剤の合成)
 ・水硬性組成物用消泡剤(A-1)の合成
 オートクレーブにオクタデシルアミン1347.6部を仕込み、オートクレーブ内を十分に窒素で置換した。撹拌しながら150℃に維持してエチレンオキサイド660.8部を0.4MPaで反応しながら圧入した後、同温度で0.5時間熟成した。80℃まで冷却した後、触媒として水酸化カリウム粉末12部を投入した後、オートクレーブ内を十分に窒素で置換した。撹拌しながら150℃に維持してプロピレンオキサイド17430部を0.4MPaで反応しながら圧入した後、同温度で1時間熟成し、反応を完結させた。触媒を除去し、オクタデシルアミン-ポリオキシエチレン(3モル)・ポリオキシプロピレン(60モル)付加物(A-1)を得た。
Test Category 1 (Synthesis of Defoamer for Hydraulic Composition)
-Synthesis of antifoaming agent (A-1) for hydraulic composition An autoclave was charged with 1347.6 parts of octadecylamine, and the inside of the autoclave was sufficiently replaced with nitrogen. While maintaining at 150 ° C. with stirring, 660.8 parts of ethylene oxide was press-fitted while reacting at 0.4 MPa, and then aged at the same temperature for 0.5 hours. After cooling to 80 ° C., 12 parts of potassium hydroxide powder was added as a catalyst, and then the inside of the autoclave was sufficiently replaced with nitrogen. The temperature was maintained at 150 ° C. with stirring, and 17430 parts of propylene oxide was press-fitted while reacting at 0.4 MPa, and then aged at the same temperature for 1 hour to complete the reaction. The catalyst was removed to obtain an octadecylamine-polyoxyethylene (3 mol) -polyoxypropylene (60 mol) adduct (A-1).
 ・水硬性組成物用消泡剤(A-2)、(A-4)、(A-5)、(A-11)~(A-15)、(AR-1)、(AR-2)及び(AR-4)の合成
 水硬性組成物用消泡剤(A-1)と同様に、(A-2)、(A-4)、(A-5)、(A-11)~(A-15)、(AR-1)、(AR-2)及び(AR-4)を合成した。
-Antifoaming agents for hydraulic compositions (A-2), (A-4), (A-5), (A-11) to (A-15), (AR-1), (AR-2) And (AR-4) Synthetic antifoaming agent for hydraulic composition (A-1), (A-2), (A-4), (A-5), (A-11) to ( A-15), (AR-1), (AR-2) and (AR-4) were synthesized.
 ・水硬性組成物用消泡剤(A-3)の合成
 オートクレーブにヘキサデシルアミン1207.3部、触媒として水酸化カリウム粉末13.4部を仕込み、オートクレーブ内を十分に窒素で置換した。撹拌しながら100℃に維持してエチレンオキサイド440.5部を0.4MPaで反応しながら圧入した後、温度を150℃まで昇温し、エチレンオキサイド881部を0.4MPaで反応しながら圧入した。その後、撹拌しながら同温度に維持してプロピレンオキサイド19754部を0.4MPaで反応しながら圧入した後、同温度で1時間熟成し、反応を完結させた。触媒を除去し、ヘキサデシルアミン-ポリオキシエチレン(6モル)・ポリオキシプロピレン(68モル)付加物(A-3)を得た。
-Synthesis of antifoaming agent (A-3) for water-hard composition An autoclave was charged with 1207.3 parts of hexadecylamine and 13.4 parts of potassium hydroxide powder as a catalyst, and the inside of the autoclave was sufficiently replaced with nitrogen. While maintaining at 100 ° C. with stirring, 440.5 parts of ethylene oxide was press-fitted while reacting at 0.4 MPa, then the temperature was raised to 150 ° C., and 881 parts of ethylene oxide was press-fitted while reacting at 0.4 MPa. .. Then, the temperature was maintained at the same temperature with stirring, and 754 parts of propylene oxide was press-fitted while reacting at 0.4 MPa, and then aged at the same temperature for 1 hour to complete the reaction. The catalyst was removed to obtain a hexadecylamine-polyoxyethylene (6 mol) -polyoxypropylene (68 mol) adduct (A-3).
 ・水硬性組成物用消泡剤(A-6)の合成
 オートクレーブに牛脂アミン(アミン価216.3mg/g)1296.8部を仕込み、オートクレーブ内を十分に窒素で置換した。撹拌しながら150℃に維持してプロピレンオキサイド1162部を0.4MPaで反応しながら圧入した後、同温度で1時間熟成した。80℃まで冷却した後、触媒として水酸化カリウム粉末8.2部を投入した後、オートクレーブ内を十分に窒素で置換した。撹拌しながら150℃に維持してプロピレンオキサイド9296部を0.4MPaで反応しながら圧入した後、同温度で1時間熟成し、反応を完結させた。触媒を除去し、牛脂アミン-ポリオキシプロピレン(36モル)付加物(A-6)を得た。
-Synthesis of antifoaming agent for water-hard composition (A-6) 1296.8 parts of beef tallow amine (amine value 216.3 mg / g) was charged into an autoclave, and the inside of the autoclave was sufficiently replaced with nitrogen. After maintaining the temperature at 150 ° C. with stirring and press-fitting 1162 parts of propylene oxide while reacting at 0.4 MPa, the mixture was aged at the same temperature for 1 hour. After cooling to 80 ° C., 8.2 parts of potassium hydroxide powder was added as a catalyst, and then the inside of the autoclave was sufficiently replaced with nitrogen. The temperature was maintained at 150 ° C. with stirring, and 9296 parts of propylene oxide was press-fitted while reacting at 0.4 MPa, and then aged at the same temperature for 1 hour to complete the reaction. The catalyst was removed to give the beef tallow amine-polyoxypropylene (36 mol) adduct (A-6).
 ・水硬性組成物用消泡剤(A-7)の合成
 ガラス製の反応容器に、メトキシポリエチレン(2モル)・ポリオキシプロピレン(25モル)付加物を3140部、トリエチルアミン2024部を加え、0℃に冷却し、反応容器内を十分に窒素で置換した。撹拌しながらメシルクロライド252部を滴下した後、20℃まで昇温し、2時間撹拌した。続いて反応系を0℃まで冷却し、オクタデシルアミン270部をエタノール630部に溶解した溶液を徐々に滴下し、滴下終了後、40℃まで昇温し、2時間熟成し、精製し、オクタデシルアミン-メトキシポリオキシエチレン(4モル)・ポリオキシプロピレン(50モル)付加物(A-7)を得た。
-Synthesis of antifoaming agent (A-7) for water-hard composition Add 3140 parts of methoxypolyethylene (2 mol) and polyoxypropylene (25 mol) adduct and 2024 parts of triethylamine to a reaction vessel made of glass, and add 0. After cooling to ° C., the inside of the reaction vessel was sufficiently replaced with nitrogen. After 252 parts of mesylate chloride was added dropwise with stirring, the temperature was raised to 20 ° C. and the mixture was stirred for 2 hours. Subsequently, the reaction system was cooled to 0 ° C., a solution prepared by dissolving 270 parts of octadecylamine in 630 parts of ethanol was gradually added dropwise, and after the addition was completed, the temperature was raised to 40 ° C., aged for 2 hours, purified, and octadecylamine was purified. -A methoxypolyoxyethylene (4 mol) -polyoxypropylene (50 mol) adduct (A-7) was obtained.
 ・水硬性組成物用消泡剤(A-8)の合成
 オートクレーブにヘプタデシルアミン1207.3部を仕込み、オートクレーブ内を十分に窒素で置換した。撹拌しながら150℃に維持してエチレンオキサイド440.5部を0.4MPaで反応しながら圧入した後、同温度で0.5時間熟成した。80℃まで冷却した後、触媒として水酸化カリウム粉末8.3部を投入した後、オートクレーブ内を十分に窒素で置換した。撹拌しながら100℃に維持してエチレンオキサイド881部を0.4MPaで反応しながら圧入した後、温度を150℃まで昇温し、プロピレンオキサイド11329.5部を0.4MPaで反応しながら圧入した。同温度で1時間熟成し、反応を完結させた。触媒を除去し、ヘプタデシルアミン-ポリオキシエチレン(6モル)・ポリオキシプロピレン(39モル)付加物(A-8)を得た。
-Synthesis of antifoaming agent (A-8) for hydraulic composition A 1207.3 part of heptadecylamine was charged into an autoclave, and the inside of the autoclave was sufficiently replaced with nitrogen. While maintaining at 150 ° C. with stirring, 440.5 parts of ethylene oxide was press-fitted while reacting at 0.4 MPa, and then aged at the same temperature for 0.5 hours. After cooling to 80 ° C., 8.3 parts of potassium hydroxide powder was added as a catalyst, and then the inside of the autoclave was sufficiently replaced with nitrogen. After maintaining the temperature at 100 ° C. with stirring and press-fitting 881 parts of ethylene oxide while reacting at 0.4 MPa, the temperature was raised to 150 ° C., and 11329.5 parts of propylene oxide was press-fitted while reacting at 0.4 MPa. .. The reaction was completed by aging at the same temperature for 1 hour. The catalyst was removed to give a heptadecylamine-polyoxyethylene (6 mol) -polyoxypropylene (39 mol) adduct (A-8).
 ・水硬性組成物用消泡剤(A-9)、(A-10)、(A-16)、(A-17)、(AR-3)及び(AR-5)の合成
 水硬性組成物用消泡剤(A-7)と同様に、(A-9)、(A-10)、(A-16)、(A-17)、(AR-3)及び(AR-5)を合成した。
-Synthetic water-hard composition of antifoaming agent (A-9), (A-10), (A-16), (A-17), (AR-3) and (AR-5) for water-hard composition Synthesize (A-9), (A-10), (A-16), (A-17), (AR-3) and (AR-5) in the same manner as the defoaming agent (A-7). did.
 ・水硬性組成物用消泡剤(AR-6)の合成
 オートクレーブにオクタデシルアルコール1352.5部、触媒として水酸化カリウム粉末8.3部を仕込み、オートクレーブ内を十分に窒素で置換した。撹拌しながら100℃に維持してエチレンオキサイド881部を0.4MPaで反応しながら圧入した後、温度を150℃まで昇温し、プロピレンオキサイド11620部を0.4MPaで反応しながら圧入した後、同温度で1時間熟成し、反応を完結させた。触媒を除去し、オクタデシルアルコール-ポリオキシエチレン(4モル)・ポリオキシプロピレン(40モル)付加物(AR-6)を得た。AR-6は、比較例として使用される水硬性組成物用消泡剤であった。
-Synthesis of antifoaming agent for hydraulic composition (AR-6) 1352.5 parts of octadecyl alcohol and 8.3 parts of potassium hydroxide powder were charged in an autoclave, and the inside of the autoclave was sufficiently replaced with nitrogen. After maintaining the temperature at 100 ° C. with stirring and press-fitting 881 parts of ethylene oxide while reacting at 0.4 MPa, the temperature was raised to 150 ° C., and 11620 parts of propylene oxide was press-fitted while reacting at 0.4 MPa. It was aged at the same temperature for 1 hour to complete the reaction. The catalyst was removed to obtain an octadecyl alcohol-polyoxyethylene (4 mol) -polyoxypropylene (40 mol) adduct (AR-6). AR-6 was a defoaming agent for hydraulic compositions used as a comparative example.
 ・水硬性組成物用消泡剤(AR-7)の合成
 水硬性組成物用消泡剤(AR-6)と同様に、水硬性組成物用消泡剤(AR-7)を合成した。AR-7は、比較例として使用される水硬性組成物用消泡剤であった。
-Synthesis of defoaming agent for hydraulic composition (AR-7) Similar to the defoaming agent for hydraulic composition (AR-6), the defoaming agent for hydraulic composition (AR-7) was synthesized. AR-7 was a defoaming agent for hydraulic compositions used as a comparative example.
 ・水硬性組成物用消泡剤(AR-8)の合成
 オートクレーブにトリエチレングリコール750.9部、触媒として水酸化カリウム粉末4.7部を仕込み、オートクレーブ内を十分に窒素で置換した。撹拌しながら150℃に維持してプロピレンオキサイド8715部を0.4MPaで反応しながら圧入した後、同温度で1時間熟成し、反応を完結させた。触媒を除去し、ポリオキシエチレン(3モル)・ポリオキシプロピレン(30モル)縮合物(AR-8)を得た。AR-8は、比較例として使用される水硬性組成物用消泡剤であった。
-Synthesis of antifoaming agent (AR-8) for hydraulic composition 750.9 parts of triethylene glycol and 4.7 parts of potassium hydroxide powder were charged in an autoclave, and the inside of the autoclave was sufficiently replaced with nitrogen. While maintaining at 150 ° C. with stirring, 8715 parts of propylene oxide was press-fitted while reacting at 0.4 MPa, and then aged at the same temperature for 1 hour to complete the reaction. The catalyst was removed to obtain a polyoxyethylene (3 mol) -polyoxypropylene (30 mol) condensate (AR-8). AR-8 was a defoaming agent for hydraulic compositions used as a comparative example.
 以上で合成した水硬性組成物用消泡剤(A-1)~(A-17)と比較例として使用される水硬性組成物用消泡剤(AR-1)~(AR-8)の内容を表1にまとめて示した。 Of the defoaming agents for hydraulic composition (A-1) to (A-17) synthesized above and the defoaming agents (AR-1) to (AR-8) for hydraulic composition used as comparative examples. The contents are summarized in Table 1.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
 表1において、
 AR-6:オクタデシルアルコール-ポリオキシエチレン(4モル)・ポリオキシプロピレン(40モル)付加物
 AR-7:ドデシルアルコール-ポリオキシエチレン(3モル)・ポリオキシプロピレン(60モル)付加物
 AR-8:ポリオキシエチレン(3モル)・ポリオキシプロピレン(30モル)縮合物
In Table 1,
AR-6: Octadecyl alcohol-polyoxyethylene (4 mol) / polyoxypropylene (40 mol) adduct AR-7: Dodecyl alcohol-polyoxyethylene (3 mol) / polyoxypropylene (60 mol) adduct AR- 8: Polyoxyethylene (3 mol) / polyoxypropylene (30 mol) adduct
について、
C8:オクチル基
C12:ドデシル基
C14*:テトラデセニル基
C15:ペンタデシル基
C16:ヘキサデシル基
C16分岐:2-ヘキシルデシル基
C17:ヘプタデシル基
C18:オクタデシル基
C18*:オクタデセニル基
C20:イコシル基
C25*:ペンタコセニル基
About R 1
C8: Octyl group C12: Dodecyl group C14 *: Tetradecenyl group C15: Pentadecyl group C16: Hexadecyl group C16 Branch: 2-hexyldecyl group C17: Heptadecyl group C18: Octadesyl group C18 *: Octadesenyl group C20: Icosyl group C25 *: Pentacosenyl Basic
 試験区分2(混和剤としてのポリカルボン酸系減水剤の合成)
 ・ポリカルボン酸系減水剤(B-1)の合成
イオン交換水、α-(3-メチル-3-ブテニル)-ω-ヒドロキシ-ポリ(45モル)オキシエチレンを反応容器に仕込み、雰囲気を窒素置換し、撹拌しながら徐々に加温した。反応系の温度を温水浴にて70℃に保ち、温度を安定させた。その後、アクリル酸を3時間かけて滴下した。同時に、チオグリコール酸、L-アスコルビン酸を水に溶解させた水溶液及び5%過酸化水素水をそれぞれ3時間かけて滴下し、ラジカル重合反応を開始した。滴下終了から1時間経過後、得られた共重合体に水及び30%水酸化ナトリウム水溶液を加え、固形分濃度25%であるポリカルボン酸系減水剤(B-1)を得た。このポリカルボン酸系減水剤を分析したところ、質量平均分子量42000、pH3.6であった。なお、共重合体の質量平均分子量はゲルパーミエーションクロマトグラフィーにて測定した。
Test category 2 (Synthesis of polycarboxylic acid-based water reducing agent as an admixture)
-Synthetic ion-exchanged water of polycarboxylic acid-based water reducing agent (B-1), α- (3-methyl-3-butenyl) -ω-hydroxy-poly (45 mol) oxyethylene was charged into the reaction vessel, and the atmosphere was nitrogen. It was replaced and gradually warmed with stirring. The temperature of the reaction system was kept at 70 ° C. in a warm water bath to stabilize the temperature. Then, acrylic acid was added dropwise over 3 hours. At the same time, an aqueous solution prepared by dissolving thioglycolic acid and L-ascorbic acid in water and a 5% hydrogen peroxide solution were added dropwise over 3 hours to initiate a radical polymerization reaction. After 1 hour from the completion of the dropping, water and a 30% aqueous sodium hydroxide solution were added to the obtained copolymer to obtain a polycarboxylic acid-based water reducing agent (B-1) having a solid content concentration of 25%. When this polycarboxylic acid-based water reducing agent was analyzed, the mass average molecular weight was 42000 and the pH was 3.6. The mass average molecular weight of the copolymer was measured by gel permeation chromatography.
・ポリカルボン酸系減水剤(B-2)及び(B-3)の調整
ポリカルボン酸系減水剤(B-1)に30%水酸化ナトリウム水溶液と水を加え、25%水溶液である(B-2)及び(B-3)を得た。pHを測定したところ、(B-2)6.8、(B-3)8.9であった。
-Adjustment of polycarboxylic acid-based water reducing agent (B-2) and (B-3) A 30% aqueous sodium hydroxide solution and water are added to the polycarboxylic acid-based water reducing agent (B-1) to obtain a 25% aqueous solution (B). -2) and (B-3) were obtained. When the pH was measured, it was (B-2) 6.8 and (B-3) 8.9.
[質量平均分子量測定条件 GPC法]
装置:Shodex GPC-101(昭和電工製)
カラム:OHpak SB-G+SB-806M HQ+SB-806M HQ(昭和電工製)
検出器:示差屈折計(RI)
溶離液:50mM硝酸ナトリウム水溶液
流量:0.7mL/分
カラム温度:40℃
試料濃度:試料濃度0.5質量%の溶離液溶液
標準物質:PEG/PEO(アジレント製)
[Mass average molecular weight measurement conditions GPC method]
Equipment: Shodex GPC-101 (manufactured by Showa Denko)
Column: OHpak SB-G + SB-806M HQ + SB-806M HQ (manufactured by Showa Denko)
Detector: Differential Refractometer (RI)
Eluent: 50 mM sodium nitrate aqueous solution Flow rate: 0.7 mL / min Column temperature: 40 ° C
Sample concentration: Eluent solution with a sample concentration of 0.5% by mass Standard substance: PEG / PEO (manufactured by Agilent)
 [pHの測定条件]
 ポリカルボン酸系減水剤1gにイオン交換水を加え100gとし、20℃にてpHメーター(HORIBA製)で測定した。
[PH measurement conditions]
Ion-exchanged water was added to 1 g of the polycarboxylic acid-based water reducing agent to make 100 g, which was measured at 20 ° C. with a pH meter (manufactured by HORIBA).
 使用した混和剤の内容を表2に示した。 Table 2 shows the contents of the admixture used.
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000005
 表2において、
B-4:ポリカルボン酸系化合物(竹本油脂製のコンクリート用高性能AE減水剤、商品名チューポールHP-11)
B-5:変性リグニンスルホン酸化合物とポリカルボン酸系化合物の複合体(竹本油脂製のコンクリート用AE減水剤、商品名チューポールEX60)
In Table 2,
B-4: Polycarboxylic acid compound (High-performance AE water reducing agent for concrete made by Takemoto Oil & Fat, trade name Chupol HP-11)
B-5: Complex of modified lignin sulfonic acid compound and polycarboxylic acid compound (AE water reducing agent for concrete made by Takemoto Oil & Fat, trade name Chupol EX60)
 試験区分3(評価用混和剤組成物の調製)
 表1に示す水硬性組成物用消泡剤(A-1)~(A-17)及び(AR-1)~(AR-8)と、表2に示す混和剤(B-1)~(B-5)を混合撹拌し、評価用混和剤組成物(合計125サンプル)を調製した。なお、混合割合は混和剤(B-1)~(B-4)では混和剤99.5質量%、水硬性組成物用消泡剤0.5質量%とし、混和剤(B-5)では混和剤99.7質量%、水硬性組成物用消泡剤0.3質量%とした。
Test Category 3 (Preparation of admixture composition for evaluation)
Defoamers (A-1) to (A-17) and (AR-1) to (AR-8) for hydraulic compositions shown in Table 1 and admixtures (B-1) to (B-1) to (AR-8) shown in Table 2. B-5) was mixed and stirred to prepare an admixture composition for evaluation (125 samples in total). The mixing ratio was 99.5% by mass for the admixtures (B-1) to (B-4), 0.5% by mass for the defoaming agent for the hydraulic composition, and 0.5% by mass for the admixture (B-5). The admixture was 99.7% by mass and the antifoaming agent for hydraulic composition was 0.3% by mass.
 試験区分4(コンクリート組成物の調製)
 ・実施例1~17及び比較例1~9
 容量60リットルの強制二軸ミキサーを用い、表3に記載の内容で、90秒間練混ぜを行い、各例のコンクリート組成物を調製した。調製したコンクリート組成物の温度は20±3℃であった。なお、水硬性組成物用消泡剤を含有しない比較例1に示すコンクリート組成物について、空気量調整剤としてAE-300(竹本油脂製の商品名)を使用し、空気量を7.0±1.0%、JIS A 1150に準拠して測定したスランプを15±2.5cmに調整し、各例のコンクリート組成物について、混和剤および試験区分3で調製した混和剤組成物の使用量は一定とした。
Test Category 4 (Preparation of Concrete Composition)
-Examples 1 to 17 and Comparative Examples 1 to 9
Using a forced twin-screw mixer with a capacity of 60 liters, the concrete compositions of each example were prepared by kneading for 90 seconds according to the contents shown in Table 3. The temperature of the prepared concrete composition was 20 ± 3 ° C. For the concrete composition shown in Comparative Example 1 which does not contain a defoaming agent for a hydraulic composition, AE-300 (trade name made by Takemoto Oil & Fat) was used as an air amount adjusting agent, and the air amount was 7.0 ±. The amount of the admixture and the admixture composition prepared in Test Category 3 for the concrete composition of each example was adjusted to 1.0%, the slump measured according to JIS A 1150 to 15 ± 2.5 cm. It was constant.
Figure JPOXMLDOC01-appb-T000006
Figure JPOXMLDOC01-appb-T000006
 表3において、
 結合材:普通ポルトランドセメント(密度=3.16g/cm
 細骨材:大井川水系産陸砂(表乾密度=2.57g/cm
 粗骨材:岡崎産砕石(表乾密度=2.66g/cm
In Table 3,
Binder: Ordinary Portland cement (density = 3.16 g / cm 3 )
Fine aggregate: Land sand from the Oi River system (surface dry density = 2.57 g / cm 3 )
Coarse aggregate: Crushed stone from Okazaki (surface dry density = 2.66 g / cm 3 )
 試験区分5(コンクリート組成物の試験及び水硬性組成物用消泡剤の評価)
 調製した各例のコンクリート組成物について、空気量を下記のように測定し、水硬性組成物用消泡剤の混和剤に対する相溶性、消泡性、気泡安定性を下記のように評価し、結果を表4にまとめて示した。
Test Category 5 (Test of concrete composition and evaluation of defoamer for hydraulic composition)
For each of the prepared concrete compositions, the amount of air was measured as follows, and the compatibility, defoaming property, and bubble stability of the defoaming agent for hydraulic composition with respect to the admixture were evaluated as follows. The results are summarized in Table 4.
 ・空気量(容積%):練混ぜ直後のコンクリート組成物について、JIS A 1128に準拠して測定した。 ・ Air volume (% by volume): The concrete composition immediately after kneading was measured in accordance with JIS A 1128.
 ・混和剤に対する相溶性:調製直後のコンクリート組成物について、水硬性組成物用消泡剤を混合直後の混和剤組成物を用いて測定した空気量I(容積%)と、40℃で1週間静置した混和剤組成物の上部50質量%を除去した下部50質量%を用いて測定した空気量II(容積%)を比較して、混和剤に対する相溶性を次の基準で評価した。
 S:非常に良好(空気量IIから空気量Iを減じた値が±0.5未満)
 A:良好(空気量IIから空気量Iを減じた値が0.5以上1.0未満)
 B:可(空気量IIから空気量Iを減じた値が1.0以上2.0未満)
 C:悪い(空気量IIから空気量Iを減じた値が2.0以上)
 ・消泡性:調製直後のコンクリート組成物について、水硬性組成物用消泡剤を含まない混和剤を用いて測定した空気量III(容積%、比較例1)と混合直後の混和剤組成物を用いて測定した空気量I(容積%)を比較して、消泡性を次の基準で評価した。
 S:非常に良好(空気量IIIから空気量Iを減じた値が4.0以上)
 A:良好(空気量IIIから空気量Iを減じた値が3.0以上4.0未満)
 B:可(空気量IIIから空気量Iを減じた値が2.0以上3.0未満)
 C:悪い(空気量IIIから空気量Iを減じた値が2.0未満)
 ・気泡安定性:水硬性組成物用消泡剤を混合直後の混和剤組成物を用いて調製したコンクリート組成物について、目視で気泡の状態を観察し、気泡安定性を次の基準で評価した。
 S:非常に良好(表面気泡の破泡がほどんど確認されない)
 A:良好(表面気泡の破泡がごくわずかに確認される)
 B:可(表面気泡の破泡がわずかに確認される)
 C:悪い(表面気泡の破泡が多く確認される)
-Compatibility with admixture: For the concrete composition immediately after preparation, the amount of air I (volume%) measured by using the admixture composition immediately after mixing the defoaming agent for the water-hard composition and 40 ° C. for 1 week. The air content II (volume%) measured using the lower 50% by mass from which the upper 50% by mass of the static admixture composition was removed was compared, and the compatibility with the admixture was evaluated according to the following criteria.
S: Very good (the value obtained by subtracting the air amount I from the air amount II is less than ± 0.5)
A: Good (the value obtained by subtracting the air amount I from the air amount II is 0.5 or more and less than 1.0)
B: Yes (the value obtained by subtracting the air amount I from the air amount II is 1.0 or more and less than 2.0)
C: Bad (the value obtained by subtracting the air amount I from the air amount II is 2.0 or more)
-Defoaming property: For the concrete composition immediately after preparation, the air volume III (volume%, Comparative Example 1) measured using an admixture containing no defoaming agent for a water-hard composition and the admixture composition immediately after mixing. The amount of air I (% by volume) measured using the above was compared, and the defoaming property was evaluated according to the following criteria.
S: Very good (the value obtained by subtracting the air amount I from the air amount III is 4.0 or more)
A: Good (the value obtained by subtracting the air volume I from the air volume III is 3.0 or more and less than 4.0)
B: Yes (the value obtained by subtracting the air amount I from the air amount III is 2.0 or more and less than 3.0)
C: Bad (the value obtained by subtracting the air volume I from the air volume III is less than 2.0)
-Able stability: For a concrete composition prepared by using an admixture composition immediately after mixing a defoaming agent for a hydraulic composition, the state of bubbles was visually observed and the bubble stability was evaluated according to the following criteria. ..
S: Very good (almost no surface bubble rupture is confirmed)
A: Good (very slight rupture of surface bubbles is confirmed)
B: Yes (slight bubble rupture of surface bubbles is confirmed)
C: Bad (many surface bubbles are confirmed)
Figure JPOXMLDOC01-appb-T000007
Figure JPOXMLDOC01-appb-T000007
表4において、
 AR-6:オクタデシルアルコール-ポリオキシエチレン(4モル)・ポリオキシプロピレン(40モル)付加物
 AR-7:ドデシルアルコール-ポリオキシエチレン(3モル)・ポリオキシプロピレン(60モル)付加物
 AR-8:ポリオキシエチレン(3モル)・ポリオキシプロピレン(30モル)縮合物
In Table 4,
AR-6: Octadecyl alcohol-polyoxyethylene (4 mol) / polyoxypropylene (40 mol) adduct AR-7: Dodecyl alcohol-polyoxyethylene (3 mol) / polyoxypropylene (60 mol) adduct AR- 8: Polyoxyethylene (3 mol) / polyoxypropylene (30 mol) adduct
(結果)
 表4に示される結果から明らかなように、本発明によると、混和剤との相溶性が高く、優れた消泡性及び気泡安定性に優れる水硬性組成物用消泡剤を提供できることが確認された。
(result)
As is clear from the results shown in Table 4, it has been confirmed that according to the present invention, it is possible to provide a defoaming agent for a hydraulic composition having high compatibility with an admixture and excellent defoaming property and bubble stability. Was done.
 本発明の水硬性組成物用混和剤は、水硬性組成物を調製する際の消泡剤として利用することができる。

 
The admixture for hydraulic composition of the present invention can be used as a defoaming agent when preparing a hydraulic composition.

Claims (10)

  1.  下記一般式(1)で表される含窒素ポリオキシアルキレン化合物を含有する水硬性組成物用消泡剤。
    Figure JPOXMLDOC01-appb-C000001
    (但し、式中、Rは、炭素数10~24のアルキル基又はアルケニル基を示し、R及びRは、同一又は異なって、水素原子及び/又は炭素数1~10の炭化水素基を示し、AO及びAOは、同一又は異なって、炭素数2~4のオキシアルキレン基を示し、m及びnは、同一又は異なって、0~100の整数であって、かつ、20≦m+n≦100の条件を満たし、AO及びAOの内、炭素数3及び/又は4のオキシアルキレン基が65モル%以上である。)
    A defoaming agent for a hydraulic composition containing a nitrogen-containing polyoxyalkylene compound represented by the following general formula (1).
    Figure JPOXMLDOC01-appb-C000001
    (However, in the formula, R 1 represents an alkyl group or an alkenyl group having 10 to 24 carbon atoms, and R 2 and R 3 are the same or different hydrocarbon groups having a hydrogen atom and / or 1 to 10 carbon atoms. A 1 O and A 2 O represent the same or different oxyalkylene groups having 2 to 4 carbon atoms, and m and n are the same or different integers of 0 to 100 and. The condition of 20 ≦ m + n ≦ 100 is satisfied, and the oxyalkylene group having 3 and / or 4 carbon atoms is 65 mol% or more among A 1 O and A 2 O.)
  2.  前記AO及び前記AOの内、炭素数3及び/又は4のオキシアルキレン基が86モル%以上である請求項1に記載の水硬性組成物用消泡剤。 The defoaming agent for a hydraulic composition according to claim 1, wherein the oxyalkylene group having 3 and / or 4 carbon atoms in the A 1 O and the A 2 O is 86 mol% or more.
  3.  前記AO及び前記AOの内、炭素数3及び/又は4のオキシアルキレン基が90モル%以上である請求項1に記載の水硬性組成物用消泡剤。 The defoaming agent for a hydraulic composition according to claim 1, wherein the oxyalkylene group having 3 and / or 4 carbon atoms in the A 1 O and the A 2 O is 90 mol% or more.
  4.  前記m、前記nは、同一又は異なって、0~80の整数であって、かつ、30≦m+n≦80の条件を満たす請求項1~3のいずれか1項に記載の水硬性組成物用消泡剤。 The hydraulic composition according to any one of claims 1 to 3, wherein m and n are the same or different, are integers of 0 to 80, and satisfy the condition of 30 ≦ m + n ≦ 80. Defoamer.
  5.  前記m、前記nは、同一又は異なって、0~80の整数であって、かつ、35≦m+n≦80の条件を満たす請求項1~3のいずれか1項に記載の水硬性組成物用消泡剤。 The hydraulic composition according to any one of claims 1 to 3, wherein m and n are the same or different, are integers of 0 to 80, and satisfy the condition of 35 ≦ m + n ≦ 80. Defoamer.
  6.  前記R及びRは、水素原子を示す請求項1~5のいずれか1項に記載の水硬性組成物用消泡剤。 The defoaming agent for a hydraulic composition according to any one of claims 1 to 5, wherein R 2 and R 3 indicate a hydrogen atom.
  7.  前記Rは、炭素数14~18のアルキル基又はアルケニル基を示す請求項1~6のいずれか1項に記載の水硬性組成物用消泡剤。 The defoaming agent for a hydraulic composition according to any one of claims 1 to 6, wherein R 1 represents an alkyl group or an alkenyl group having 14 to 18 carbon atoms.
  8.  前記AO及び前記AOは、同一または異なって、炭素数2及び/又は3のオキシアルキレン基(但し、AO及びAOのうちの少なくとも1つは炭素数3のオキシアルキレン基を含む)である請求項1~7のいずれか1項に記載の水硬性組成物用消泡剤。 The A 1 O and the A 2 O are the same or different, and the oxyalkylene group having 2 and / or 3 carbon atoms (provided that at least one of A 1 O and A 2 O is an oxyalkylene group having 3 carbon atoms. The antifoaming agent for a hydraulic composition according to any one of claims 1 to 7 (including a group).
  9.  請求項1~8のいずれか1項に記載の水硬性組成物用消泡剤を含有する水硬性組成物。 A hydraulic composition containing the antifoaming agent for a hydraulic composition according to any one of claims 1 to 8.
  10.  pHが8以下である混和剤を含有する請求項9に記載の水硬性組成物。

     
    The hydraulic composition according to claim 9, which contains an admixture having a pH of 8 or less.

PCT/JP2019/014477 2019-04-01 2019-04-01 Defoaming agent for hydraulic composition, and hydraulic composition WO2020202435A1 (en)

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