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 of preparing the same; a cement admixture comprising a polycarboxylic acid-based copolymer derived from the macromonomer and a layered double hydroxide; and a method of preparing the same. The polycarboxylic acid-based copolymer comprises (a) a structural unit derived from a macromonomer compound represented by Formula 1 below and (b) a structural unit derived from an acrylic monomer represented by Formula 4. The cement admixture has superior dispersibility, workability maintenance, and corrosion resistance.
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[Formula 1]:€ƒ€ƒ€ƒ€ƒ€ƒCH 2 =CR 1 -(CH 2 ) m -O-(CH 2 CH 2 O) n -OCO-R 2 -COOH
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[Formula 4]:€ƒ€ƒ€ƒ€ƒ€ƒCH 2 =CR 3 -COM 1