Dimethyl silicone oil is a common organic silicon polymer material. It has excellent chemical stability, heat resistance, hydrophobicity, and lubricity. It is widely used in many fields. Here is a detailed introduction:

Basic Information

• Chemical Structure: It is a linear polymer with a main chain of silicon-oxygen bonds (-Si-O-Si-) and methyl groups (-CH₃) as side chains. The molecular formula can be represented as (CH₃)₃SiO [(CH₃)₂SiO]ₙSi (CH₃)₃.
• Physical Properties:
  • It is a colorless, transparent, odorless, and non-toxic liquid. It is insoluble in water but soluble in organic solvents such as benzene and toluene.
  • It has a wide range of viscosities (5-1,000,000 centistokes), which can be adjusted from low-flow liquids to semi-solid gels.
  • It can be used for a long time at temperatures ranging from -50℃ to 200℃ and can withstand higher temperatures for a short period. It also has strong weather resistance.

Core Characteristics

• Excellent Hydrophobicity: It can form a hydrophobic film on the surface of objects, which is used for waterproofing and moisture-proofing applications, such as waterproofing treatment of concrete and glass.
• Low Surface Tension: It is widely used as a defoamer and lubricant in industries like chemical, textile, and food (for example, as a defoamer in latex paint and a lubricant in metal processing).
• Chemical Stability: It is resistant to the corrosion of strong acids, strong bases, and inorganic salt solutions. It is not easy to react with other substances, making it suitable for harsh environments.
• Physiological Inertness: It is non-toxic, non-irritating, and meets medical standards. It is used in pharmaceuticals and cosmetics (for example, as a base for ointments and a smoothness agent in skincare products)