▎ 摘　　要

NOVELTY - Water reducing agent comprises 240-250 pts. wt. isopentyl ether, 25.2-26.0 pts. wt. acrylic acid, 1.6-1.65 pts. wt. ammonium persulfate, 0.53-0.55 pts. wt. mercaptoacetic acid, 13-14 pts. wt. lignin, 10wt.% sodium hydroxide solution, 26-28 pts. wt. graphene oxide, 0.8-1 pts. wt. rosin glyceride, 3-4 pts. wt. sodium gluconate, 5.5-6.5 pts. wt. acrylic acid grafted starch, 0.7-0.8 pts. wt. sodium polyacrylate, 9-11 pts. wt. searlesite powder, 2-2.5 pts. wt. sulfurized castor oil, and deionized water. USE - Water reducing agent for improving concrete property (claimed). ADVANTAGE - The water reducing has dispersing effect, improves dispersibility of cement, and improves water reducing rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing water reducing agent, which involves: (A) adding graphene oxide in 4-5 times of deionized water and putting into ultrasonic oscillator for 30-40 minutes for uniform dispersion to obtain graphene oxide dispersion liquid, putting graphene oxide dispersion liquid into water bath and heating at 60-80 degrees C, and slowly adding lignin, stirring and dispersing it uniformly to obtain mixture; (B) adding isopentyl ether in deionized water, stirring at 60-70 degrees C, adding ammonium persulfate and slowly dripping acrylic acid, mercaptoacetic acid, and obtained mixture for 3-3.5 hours, and reacting for 60-90 minutes, and adding 10wt.% sodium hydroxide solution adjusting its pH value to neutral and controlling its solid content to 40-45%; (C) dissolving sodium polyacrylate in 25-30 times deionized water, and adding and stirring searlesite powder into it at speed of 500-600 revolutions per minute (rpm), and adding acrylic acid grafted starch, heating and stirring at 50-60 degrees C for 40-50 minutes, adding rest residual component, and stirring at speed of 1000-1200rpm to obtain stirred material; and (D) mixing obtained materials with stirred material, and stirring in kettle at speed of 600-800rpm, and mixing and dispersing uniformly to obtain product.