Should I Be Concerned About the Use of Foam? Although memory foam is generally considered safe, it may pose a problem for certain people, such as those who suffer from allergies, asthma, or other respiratory conditions. Memory foam may also bother you if you are very sensitive to smells. After the literature review, glycerol, PAM, and polyethylene glycol were selected as the foaming agents. Glycerol, or "glycerin," is a suitable solvent for numerous inorganic salts and gases. Note. When subjected to high heat, permitted Antifoaming Agent E – 900a degrades into compounds that include formaldehyde, a harmful substance that can cause cancer. The general process by which these antifoam agents are made requires that a mixture of the dimethylpolysiloxane fluid and the untreated and treated fumed silica filler is initially heated to about 150° C. to disperse the filler. The mixture is then homogenized under pressure or milled and cooled. Abstract. Foams and antifoams are two entities with entirely different natures. For example, the foams are structures of bubbles in contact, while the antifoams are emulsions containing hydrophobic particles. The interaction between them makes the foam decay faster and, at the same time, exhausts the antifoam. The two most common antifoam agents used in well cementing are silicones and polypropylene glycols. Polypropylene glycols are the most frequently used as they are low-cost and are effective antifoams in most situations. Silicones are widely used as defoamers (add as needed) and antifoams (added up front) in a wide variety of industrial applications, including wastewater treatment, construction products, paints and coatings, metalworking fluids, agriculture, cleaning agents, pulp and paper and food processing. If you are looking for high quality, high purity and cost-effective foamed concrete, or if you require the latest price of foamed concrete, please feel free to email contact mis-asia.