▎ 摘　　要

NOVELTY - Modified polyol acrylate prepared by modifying graphene oxide and silane coupling agent through polyol acrylate, is claimed. The polyol acrylate is dipropylene glycol diacrylate and/or dipropylene glycol monoacrylate. USE - Used as modified polyol acrylate. ADVANTAGE - The modified polyol acrylate: overcomes the problem that the polyol acrylate is easy to delaminate in water after the polyol acrylate is modified by graphene oxide and silane coupling agent; improves the water solubility; and improves solution radical polymerization reaction efficiency of dipropylene glycol diacrylate and dipropylene glycol monoacrylate. The water reducing agent improves the water solubility and reactivity of the shrinkage-reducing functional monomer, and shrinkage reduction performance of the product. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) shrinkage-reducing polycarboxylic acid water reducing agent, comprising modified polyol acrylate and polyether macromonomer; and (2) preparing shrinkage-reducing polycarboxylic acid water reducing agent, comprising recating modified polyol acrylate and polyether macromonomer by free radical copolymerization to obtain shrinkage-reducing polycarboxylic acid water reducing agent.