MACROMONOMER FOR PREPARING CEMENT ADMIXTURE AND METHOD FOR PREPARING SAME, AND CEMENT ADMIXTURE COMPRISING POLYCARBOXYLIC ACID COPOLYMER, DERIVED FROM MACROMONOMER, AND LAYERED DOUBLE HYDROXIDE AND METHOD FOR PREPARING SAME

摘要

Disclosed are a macromonomer for preparing a cement admixture and a method for preparing same; and a cement admixture comprising a polycarboxylic acid copolymer, derived from the macromonomer, and a layered double hydroxide and a method for preparing same. The polycarboxylic acid copolymer comprises (a) a structural unit derived from a macromonomer compound represented by the following chemical formula (1) and (b) a structural unit derived from an acrylic monomer represented by the following chemical formula (4). The cement admixture has superior dispersibility, workability maintenance, and corrosion resistance. [chemical formula (1)] CH2=CR1-(CH2)m-O-(CH2CH2O)n-OCO-R2-COOH [chemical formula (4)] CH2=CR3-CO-M1