ADDITIVE FOR CEMENT AT IMPROVED PLASTICIZING PROPERTIES AND METHOD OF PREPARATION OF SUCH ADDITIVE Russian patent published in 2007 - IPC C04B24/26 C04B28/02 C04B103/30 

FIELD: additives for cement.

SUBSTANCE: additive contains copolymer or its salt obtained through neutralization of copolymer by alkali agent; copolymer is obtained through copolymerization of mixture of monomers including monomer presented by chemical formula 1, monomer presented by chemical formula 2 and reactive surfactant - active agent presented by chemical formula 3. Specification describes method of preparation of additive and cement composition containing such additive.

EFFECT: retaining of composition fluidity; avoidance of fluidity with passage of time; obtaining required degree of air entrainment of composition.

13 cl, 2 tbl, 7 ex