XJY-8205 methyl MQ resin series products can be used in the field of defoaming. The MQ resin has a three-dimensional structure and will be cross-linked with the main body of the defoamer to form a network to avoid the breakage of the main active substances composed of disiloxane and silica , Thereby improving the acid and heat resistance of the defoaming agent, and increasing the defoaming time.