cement dispersant polymers high fluidity concrete, high strength and self-compacting

A water-soluble acrylic copolymer with cement dispersing properties, accelerating the setting and corrosion for steel can be obtained by copolymerizing a monocarboxylic acid or its salt -olefinico represented by formula 1 given below, a second monomer acrylic represented by formula 2 given below, optionally a third acrylic monomer shown by formula 3 given below, a fourth monomer acrylic acid represented by the formula 4 given below and optionally a fifth acrylic monomer represented by formula 5, so that the molar ratio of constituent monomer units 1,2,3,4 and 5 is a: b: c: d: e = 1: (0.01 to 0.80) :( 0- 0.80) :( 0.001 to 0.3) :( 0-0.5) and: (b + c + d + e) ​​= 0.1: 0.9 to 0.9: 0.1 in which a designates the molar concentration range of constituent monomers 1, b designates the molar concentration range of constituent monomers 2, c desig na interval concentracionmolar of the constituent monomers 3, d designates the range of molar concentration of constituent monomers 4, e designates the range of molar concentration of constituent monomers 5 wherein said monomers the structural formulas shown below: in which each R, independently of each other, represents a hydrogen atom or a methyl group, R 1 and R 2, independently of each other, they represent an alkyl C1-C4, a hydroxyethyl group (CH2CH2OH), a group acetoxyethyl (CH2CH2OCOCH3), a hydroxy-isopropyl (CH2-CHOH-CH3), an acetoxy-isopropyl (CH2-CHOCOCH3), or R 1 and R 2 group can form together with the nitrogen atom to which they are attached, a ring morpholine; R 3 is a C1-C4 alkyl, R 4 and R alkyl residue 5 independently represent an aliphatic, cycloaliphatic, araliphatic or, or R 4 and R 5 may form, together with the nitrogen atom to which they are attached, a system morpholine or imidazole ring, M representaun hydrogen atom, an ion of alkali metal, an alkaline earth metal ion, an aluminum ion, an ammonium group or an organic ammonium group; X and Y independently represent integers from 2-300.