[Building Materials Network] Defoamers, also known as antifoams, will produce many harmful foams in the process of industrial production, so defoamers need to be added. It is widely used to remove harmful foam generated in the production process of latex, textile sizing, food fermentation, biomedicine, coating, petrochemical, paper making, industrial cleaning and other industries. There are many kinds of defoamers, including organosiloxane and polyether