▎ 摘　　要

NOVELTY - Defoaming agent comprises 40-50 pts wt. polyether modified trisiloxane, 30-40 pts. wt. polyacrylamide, 20-30 pts. wt. colophony, 10-15 pts. wt. polyacrylonitrile carbon fiber, 5-8 pts. wt. of graphene, 5-8 pts. wt. glass fiber, 3-5 pts. wt. sodium bisulfate and 1-2 pts. wt. ferric oxide. USE - The defoaming agent is useful in paper making process. ADVANTAGE - The high temperature resistant defoaming agent has good defoaming property, and increases the hardness of the paper. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the defoaming agent comprising uniformly mixing the polyether modified trisiloxane, polyacrylamide, colophony, 20-30 pts. wt. glycerol and sodium bisulfate at 110-120 degrees C using homogenizer, adding polyacrylonitrile carbon fiber, glass fiber, graphene and ferric oxide in the obtained product at 90-100 degrees C under ultrasonic vibration and regulating the pH value of the mixture to 6.5.