Abstract: An admixture for a hydraulic composition includes a polycondensation product P containing a copolymer prepared by polycondensation of a monomer mixture containing compounds A to C of the following Formulae (A) to (C); and a polycarboxylic acid-based polymer Q including a structural unit having an amino and an imino group, and/or a structural unit having an amino, imino, and amido group: (wherein R1 is a hydrogen atom, alkyl, or alkenyl group; A1O is a C2-4 alkylene oxide group; p is a number of 1 to 300; and X is a hydrogen atom, an alkyl, or acyl group; R2 is an alkyl or alkenyl group; A2O is a C2-4 alkylene oxide group; q is a number of 1 to 300; and Y1 is a phosphate ester group; and R3 is a hydrogen atom, carboxy, alkyl, alkenyl, phenyl, naphthyl, or heterocyclic group; and r is a number of 1 to 100).

Abstract: An admixture for a hydraulic composition includes a polycondensation product P containing a copolymer prepared by polycondensation of a monomer mixture containing compounds A to C of the following Formulae (A) to (C); and a polycarboxylic acid-based polymer Q including a structural unit having an amino and an imino group, and/or a structural unit having an amino, imino, and amido group: (wherein R1 is a hydrogen atom, alkyl, or alkenyl group; A1O is a C2-4 alkylene oxide group; p is a number of 1 to 300; and X is a hydrogen atom, an alkyl, or acyl group; R2 is an alkyl or alkenyl group; A2O is a C2-4 alkylene oxide group; q is a number of 1 to 300; and Y1 is a phosphate ester group; and R3 is a hydrogen atom, carboxy, alkyl, alkenyl, phenyl, naphthyl, or heterocyclic group; and r is a number of 1 to 100).

Abstract: There is provided a gypsum dispersant and a gypsum additive that improve the fluidity of gypsum slurry even if gypsum raw materials used are different in quality and that do not induce delay of curing of gypsum slurry. A gypsum dispersant, characterized by comprising: (A) a polycarboxylic acid polymer; and (B) a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid as essential components, and/or an alkylene oxide adduct of the polyamide polyamine.

Abstract: There is provided a gypsum dispersant and a gypsum additive that improve the fluidity of gypsum slurry even if gypsum raw materials used are different in quality and that do not induce delay of curing of gypsum slurry. A gypsum dispersant, including: (A) a polycarboxylic acid polymer; and (B) a polymer obtained by a reaction of an alkylene diamine and/or a monoamine and an epihalohydrin as essential components.

Abstract: There is provided a gypsum dispersant and a gypsum additive that improve the fluidity of gypsum slurry even if gypsum raw materials used are different in quality and that do not induce delay of curing of gypsum slurry. A gypsum dispersant, including: (A) a polycarboxylic acid polymer; and (B) a polymer obtained by a reaction of an alkylene diamine and/or a monoamine and an epihalohydrin as essential components.

Abstract: There is provided a gypsum dispersant and a gypsum additive that improve the fluidity of gypsum slurry even if gypsum raw materials used are different in quality and that do not induce delay of curing of gypsum slurry. A gypsum dispersant, including: (A) a polycarboxylic acid polymer; and (B) a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid as essential components, and/or an alkylene oxide adduct of the polyamide polyamine.

Abstract: The present invention relates to a cement dispersant, and an object thereof is to provide a cement dispersant having high water reducing property, low setting retardation and low concrete viscosity and taking also applicability into account. The cement dispersant comprises a polycarboxylic acid polymer formed by structural unit (I) composed of a reactive alcohol alkylene oxide adduct and structural unit (II) composed of a reactive dibasic acid, and preferably further structural unit (III) containing polyamide polyamine in the unit, wherein fumaric acid and/or a derivative thereof is used as a partial or main starting material of the structural unit (II). The cement dispersant is excellent in water reducing property, setting retardation and concrete viscosity.

Abstract: A superior cement dispersant and a concrete composition containing the cement dispersant, the cement dispersant being a water-soluble amphoteric copolymer which contains an alkylene oxide adduct of a polyamide polyamine having an unsaturated group and at least two types of polyalkylene glycol ester. When the cement dispersant is compounded with a concrete composition, the dispersion performance thereof increases with time, and the concrete viscosity is effectively decreased. The cement dispersant composition contains a water-soluble amphoteric copolymer or the neutralized salt thereof as an essential component, which is obtained by copolymerizing an alkylene oxide adduct of a polyamide polyamine having an unsaturated group, (meta)acrylic acid or an alkali metal, ammonium, or alkanolamine salt thereof, an ester of an alkylene glycol and methacrylic acid, and an ester of an alkylene glycol and acrylic acid. In addition, the concrete composition containing the above cement dispersant is also disclosed.