MACROMONOMER FOR OBTAINING ADDITIVES FOR CEMENT, METHOD OF ITS PRODUCTION, ADDITIVE TO CEMENT, INCLUDING POLYCARBOXYL COPOLYMER OBTAINED FROM MACROMONOMER AND LAYERED DOUBLE HYDROXIDE, AND A METHOD OF OBTAINING ADDITIVES TO CEMENT

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to the macromonomer of Formula 1, where the values forthe R¹,R², m, n, are given in the claims that are used to prepare the cement additive. Also a process of preparing the macromonomer cement additive comprising a copolymer of a polycarboxylic acid derived from the macromonomer and the layered double hydroxide and a method for its preparation is disclosed. The copolymer based on the polycarboxylic acid comprises (a) a structural unit derived from the macromonomer compound represented by the formula 1 below and (b) a structural unit derived from the acrylic monomer represented by the formula 4 wherein the values forthe R³, M¹ are given in the claims. Formula 1: CH₂=CR¹-(CH₂)_m-O-(CH₂CH₂O)_n-OCO-R²-COOH, Formula 4: CH₂=CR³-CO-M¹.;EFFECT: cement admixture has excellent dispersibility, workability and corrosion resistance.;25 cl, 4 dwg, 7 tbl, 14 ex