| 摘要 |
The present invention relates to a polycarbonic acid-based cement dispersant, a method for preparing the same, and a mortar-concrete admixture using the polycarbonic acid-based cement dispersant.;The cement dispersant of the present invention and the mortar-concrete admixture using the cement dispersant are applied to a cement composition such as a cement paste, mortar, concrete, etc., enhance a dispersion and retention force between cement molecules, have excellent fluidity due to the suppression of slump loss, and have an effect of improving workability, such as shortening a concrete mixing time by 20% or more. Further, the mortar-concrete admixture using the cement dispersant of the present invention has an effect of providing a very good concrete condition and an appropriate compressive strength over time. |
| 主权项 |
1. A cement dispersant which is a polymer composition represented by Formula (f),
wherein the polymer composition comprises a copolymer including a compound represented by Formula (a) and a compound represented by at least one of Formulas (d) and (e), and the compound of Formula (a) is formed by a ring-opening reaction of an acid anhydride represented by Formula (c) with a metharyl (poly)alkylene glycol ether compound represented by Formula (b), and is able to be used alone or in combination with the compound of Formula (b): wherein each of R1 to R3 represents a hydrogen atom, or at least one alkyl group having 1 to 30 carbon atoms, R4 represents an alkyl group having 1 to 30 carbon atoms, X represents an alkyl group having 0 to 30 carbon atoms, Y represents an alkyl group having 1 to 30 carbon atoms, and m represents the average number of moles of added oxyalkylene and alkyl groups and is a number ranging from 1 to 400; wherein each of R1 to R3 represents a hydrogen atom, or at least one alkyl group having 1 to 30 carbon atoms, R4 represents an alkyl group having 1 to 30 carbon atoms, X represents an alkyl group having 0 to 30 carbon atoms, and m represents the average number of moles of added oxyalkylene and alkyl groups and is a number ranging from 1 to 400; wherein Y represents a material, such as an alkene, a phenyl, an alkyl, an aryl, an aliphatic cyclic compound, or an aromatic compound, which has 1 to 30 carbon atoms; wherein each of R5 to R7 represents a hydrogen atom, or an alkyl, alkylene, allyl or acid, all of which have 1 to 30 carbon atoms, and M represents a hydrogen atom, or a compound such as a monovalent or divalent metal and ammonia, and a primary, secondary or tertiary amine; wherein each of R8 to R9 represents an alkyl group having 1 to 30 carbon atoms, and M represents a hydrogen atom, or a compound such as a monovalent or divalent metal and ammonia, and a primary, secondary or tertiary amine; and wherein each of R1 to R3 and R5 to R7 represents a hydrogen atom, or an alkyl group having 1 to 30 carbon atoms, each of R4 and R8 to R9 represents an alkyl group having 1 to 30 carbon atoms, X represents an alkyl group having 0 to 30 carbon atoms, each of m, o, p, q and r represents the average number of moles, provided that m is in a range of 1 to 400 moles, o, p and r are in a range of 0 to 400 moles, and q is in a range of 0.1 to 400 moles, and M represents a hydrogen atom, a compound such as a monovalent or divalent metal and ammonia, and a primary, secondary or tertiary amine. |
