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EP-3272721-B1 - DISPERSANT COMPOSITION FOR HYDRAULIC COMPOSITIONS

EP3272721B1EP 3272721 B1EP3272721 B1EP 3272721B1EP-3272721-B1

Inventors

  • SAIDA, KAZUYA
  • KOYANAGI, KOJI
  • SHIMODA, MASAAKI
  • TANAKA, SHUNYA

Dates

Publication Date
20260506
Application Date
20160317

Claims (10)

  1. A dispersant composition for a hydraulic composition or an inorganic powder, the dispersant composition comprising (A) a formaldehyde naphthalenesulfonate condensate or a salt thereof, and (B) one or more compounds represented by the following general formula (B1), wherein a molar ratio of a total amount of (B) to the naphthalene ring-containing monomer unit in (A) is 4% or more and less than 16%, R-X-(AO) n -Y (B1) wherein: R is an alkyl group having a carbon number of 10 or more and 22 or less, an alkenyl group having a carbon number of 10 or more and 22 or less, a benzyl phenyl group having a carbon number of 13 or more and 27 or less, or a styrenated phenyl group having a carbon number of 14 or more and 30 or less; X is O or COO; AO is an alkyleneoxy group having a carbon number of 2 or more and 4 or less; n represents an average number of AO moles added and is 9 or more and 150 or less; and Y is a hydrogen atom or an alkyl group having a carbon number of 1 or more and 4 or less.
  2. The dispersant composition for a hydraulic composition or an inorganic powder according to Claim 1, further comprising (C) an antifoaming agent, which preferably is a fatty acid ester-based antifoaming agent.
  3. A hydraulic composition comprising a hydraulic powder, water, (A) a formaldehyde naphthalenesulfonate condensate or a salt thereof, and (B) one or more compounds represented by the following general formula (B1), wherein a molar ratio of a total amount of (B) to the naphthalene ring-containing monomer unit in (A) is 4% or more and less than 16%, R-X-(AO) n -Y (B1) wherein: R is an alkyl group having a carbon number of 10 or more and 22 or less, an alkenyl group having a carbon number of 10 or more and 22 or less, a benzyl phenyl group having a carbon number of 13 or more and 27 or less, or a styrenated phenyl group having a carbon number of 14 or more and 30 or less; X is O or COO; AO is an alkyleneoxy group having a carbon number of 2 or more and 4 or less; n represents an average number of AO moles added and is 9 or more and 150 or less; and Y is a hydrogen atom or an alkyl group having a carbon number of 1 or more and 4 or less.
  4. The hydraulic composition according to Claim 3, further comprising (C) an antifoaming agent, which preferably is a fatty acid ester-based antifoaming agent.
  5. The hydraulic composition according to any one of Claims 3 to 4, wherein (A) is contained in an amount of 0.01 parts by mass or more and 2 parts by mass or less relative to 100 parts by mass of the hydraulic powder.
  6. The hydraulic composition according to any one of Claims 3 to 5, wherein (B) is contained in an amount of 0.001 parts by mass or more and 2.0 parts by mass or less relative to 100 parts by mass of the hydraulic powder.
  7. A method for manufacturing a dispersant composition for a hydraulic composition, wherein the dispersant composition comprises (A) a formaldehyde naphthalenesulfonate condensate or a salt thereof, and (B) one or more compounds represented by the following general formula (B1), the method comprising mixing (A) and (B) so that a molar ratio of a total amount of (B) to the naphthalene ring-containing monomer unit in (A) is 4% or more and less than 16%, R-X-(AO) n -Y (B1) wherein: R is an alkyl group having a carbon number of 10 or more and 22 or less, an alkenyl group having a carbon number of 10 or more and 22 or less, a benzyl phenyl group having a carbon number of 13 or more and 27 or less, or a styrenated phenyl group having a carbon number of 14 or more and 30 or less; X is O or COO; AO is an alkyleneoxy group having a carbon number of 2 or more and 4 or less; n represents an average number of AO moles added and is 9 or more and 150 or less; and Y is a hydrogen atom or an alkyl group having a carbon number of 1 or more and 4 or less.
  8. A method for manufacturing a hydraulic composition, the method comprising mixing a hydraulic powder, water, (A) a formaldehyde naphthalenesulfonate condensate or a salt thereof, and (B) one or more compounds represented by the following general formula (B1), wherein (B) is mixed so that a molar ratio of a total amount of (B) to the naphthalene ring-containing monomer unit in (A) is 4% or more and less than 16%, R-X-(AO) n -Y (B1) wherein: R is an alkyl group having a carbon number of 10 or more and 22 or less, an alkenyl group having a carbon number of 10 or more and 22 or less, a benzyl phenyl group having a carbon number of 13 or more and 27 or less, or a styrenated phenyl group having a carbon number of 14 or more and 30 or less; X is O or COO; AO is an alkyleneoxy group having a carbon number of 2 or more and 4 or less; n represents an average number of AO moles added and is 9 or more and 150 or less; and Y is a hydrogen atom or an alkyl group having a carbon number of 1 or more and 4 or less.
  9. Use of the dispersant composition for a hydraulic composition as defined in any one of Claims 1 to 2 as a dispersant for a hydraulic composition containing a hydraulic powder and water.
  10. Use of the composition as defined in any one of Claims 3 to 6 as a hydraulic composition.

Description

Field of the Invention The present invention relates to a dispersant composition for a hydraulic composition, a dispersant composition for an inorganic powder, a hydraulic composition, a method for manufacturing a dispersant composition for a hydraulic composition, and a method for manufacturing a hydraulic composition. Background of the Invention Dispersants for a hydraulic composition are chemical admixtures, and used for dispersing cement particles, thereby reducing a unit water quantity necessary for achieving a required slump and enhancing workability and the like of a hydraulic composition. Examples of conventionally-known dispersants include naphthalene-based dispersants such as a formaldehyde naphthalenesulfonate condensate, polycarboxylic acid-based dispersants such as a copolymer of a monomer having a carboxylic acid and a monomer having an alkylene glycol chain, and melamine-based dispersants such as a melaminesulfonic acid-formaldehyde condensate. Compared to polycarboxylic acid-based dispersants and melamine-based dispersants, naphthalene-based dispersants are characterized in that they have smaller fluctuations in exhibiting the fluidity in response to changes of materials or temperatures, and a hydraulic composition obtained thereby has a relatively low viscosity and they are easy to use in manufacturing a hydraulic composition. JP-A 61-281054 describes a chemical admixture for concrete, which contains a cement dispersant and a specific nonionic surfactant at a predetermined weight ratio. JP-A 2003-165755 describes a workability-improving agent for improving workability of a cement composition, which contains a specific polyalkylene oxide derivative and/or a specific hydrocarbon derivative. JP-A 2003-165755 also describes a cement water-reducing agent containing the workability-improving agent and a water-reducing agent. JP-A 55-023047 describes a slurry, which is composed of water and a hydraulic composition containing a β naphthalenesulfonic acid formaldehyde condensate and a nonionic surfactant having an oxyethylene chain. JP-A 60-011255 describes a cement additive, which is composed of a formalin condensate of a metal salt of naphthalenesulfonate and a polyoxyethylene-based compound. JP-A 48-028525 describes a method for manufacturing a concrete product, which includes molding a desired concrete product with concrete additionally containing an anionic surfactant, and performing atmospheric pressure steam curing of the molded product. Meanwhile, use of a surfactant as a cement chemical admixture has also been conventionally proposed. JP-A 50-150724 describes a cement chemical admixture, which contains an anionic surfactant of sulfuric ester type and a polyoxyalkylene- or polyhydric alcohol-based nonionic surfactant. JP S62 3060 A describes a cement additive for improving the dispersibility of cement particles in mortar or concrete. WO 03 024 885 A describes a workability-improving agent for improving the workability of cementitious compositions comprising at least one polyalkylene oxide derivative. Summary of the Invention The present invention provides a dispersant composition for a hydraulic composition, which provides a hydraulic composition with excellent fluidity. The present invention relates to a dispersant composition for a hydraulic composition, which contains: (A) a formaldehyde naphthalenesulfonate condensate or a salt thereof; and(B) one or more compounds represented by the following general formula (B1), wherein a molar ratio of a total amount of (B) to the naphthalene ring-containing monomer unit in (A) is 4% or more and less than 16%,         R-X- (AO)n-Y     (B1) wherein: R is an alkyl group having a carbon number of 10 or more and 22 or less, an alkenyl group having a carbon number of 10 or more and 22 or less, a benzyl phenyl group having a carbon number of 13 or more and 27 or less, or a styrenated phenyl group having a carbon number of 14 or more and 30 or less;X is O or COO;AO is an alkyleneoxy group having a carbon number of 2 or more and 4 or less;n represents an average number of AO moles added and is 9 or more and 150 or less; andY is a hydrogen atom or an alkyl group having a carbon number of 1 or more and 4 or less. Furthermore, the present invention relates to a hydraulic composition, which contains: a hydraulic powder; water; (A) a formaldehyde naphthalenesulfonate condensate or a salt thereof; and (B) one or more compounds represented by the following general formula (B1), wherein a molar ratio of a total amount of (B) to the naphthalene ring-containing monomer unit in (A) is 4% or more and less than 16%,         R-X- (AO)n-Y     (B1) wherein: R is an alkyl group having a carbon number of 10 or more and 22 or less, an alkenyl group having a carbon number of 10 or more and 22 or less, a benzyl phenyl group having a carbon number of 13 or more and 27 or less, or a styrenated phenyl group having a carbon number of 14 or more and 30 or less;X is O or COO;AO is