▎ 摘　　要

NOVELTY - Super-shrinkage-reducing polycarboxylate water-reducing agent comprises shrinkage-reducing polycarboxylate water-reducing agent, anti-segregation agent, and slump-retaining agent, where the shrinkage-reducing polycarboxylate water-reducing agent is obtained by free radical copolymerization of modified polyol acrylate and polyether macromonomer. USE - Used as a super-shrinkage-reducing polycarboxylate water-reducing agent. ADVANTAGE - The water-reducing agent greatly improves water solubility of the polyol acrylate, improves the solution free radical polymerization reaction efficiency of dipropylene glycol diacrylate and dipropylene glycol monoacrylate, is capable of improving the solution free radical polymerization reaction efficiency of the modified polyol acrylate and increases the number of shrinkage reducing groups in a synthesized shrinkage reducing polycarboxylate super plasticizer, improves the water solubility and reactivity of a shrinkage-reducing functional monomer, and has more shrinkage-reducing groups, thus improving the shrinkage-reducing property of the product. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing ultra-condensation-reducing polycarboxylate water-reducing agent comprising firstly, copolymerizing the modified polyalcohol acrylate and polyether macromonomer by free radical to obtain the shrinkage reducing polycarboxylic acid water reducing agent; then compounding the reducing type polycarboxylic acid water reducing agent, anti-segregation agent, and slump-retaining agent to obtain the ultra-shrinkage type polycarboxylic acid water reducing agent.