Food Grade Polydimethylsiloxane

Polydimethylsiloxane, chemically known as dimethyl silicone oil, is a colorless or light yellow liquid, odorless, highly transparent, with heat resistance, cold resistance, minimal viscosity change with temperature, waterproofing, low surface tension, and thermal conductivity. Its thermal conductivity coefficient is 0.134-0.159 W/M*K, and its light transmittance is 100%. Dimethyl silicone oil is non-toxic, odorless, physiologically inert, and has good chemical stability. It exhibits excellent electrical insulation, weather resistance, hydrophobicity, and high shear resistance, and can be used for long periods at temperatures ranging from -50°C to 200°C. With outstanding physical properties, it can be directly used for moisture-proof insulation, damping, shock absorption, defoaming, lubrication, polishing, and other applications. It is widely used as an insulating lubricant, anti-vibration agent, anti-oil dust agent, dielectric fluid, and heat transfer medium. It is also employed as a defoamer, release agent, and additive in paints and daily chemical products.

Polydimethylsiloxane can be mixed with surfactants such as lanolin, stearyl alcohol, cetyl alcohol, monostearate, Tween, and Span to form an emulsion-type base. Adding film-forming agents like PVP, PVA, and cellulose derivatives enhances its protective properties. It facilitates faster drug release and skin penetration compared to lanolin, petrolatum, and Vaseline.

Physical Property Parameters of Polydimethylsiloxane

Polydimethylsiloxane is a food-grade defoamer used in the brewing and fermentation processes of pharmaceuticals and food products. Due to its non-toxicity and lack of physiological reactions in the human body, it is also used as a medical defoamer for treating acute pulmonary edema and flatulence. In pharmacology, substances referred to as silicones (or silicone oils) are a general term for a class of organosilicon oxide polymers. Dimethyl silicone oil is one of the commonly used types in pharmaceuticals. Others include ethyl silicone oil, methyl phenyl silicone oil, and wax-containing silicone oil. In polishing agents like insect wax, a small amount of this product is often added to enhance surface gloss and moisture resistance. Due to its excellent lubricity, ease of application, non-staining properties, and compatibility with skin function, it is an ideal hydrophobic base. It is often combined with oily bases to create protective ointments for preventing irritation or corrosion from water-soluble substances, acids, and alkalis.

(The food additive production license for polydimethylsiloxane, and the food safety testing items for food additives comply with the requirements of GB 30612-2014 and Standard No. 1.)

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