Chinese name: polydimethylsiloxane
Poly(dimethylsiloxane)
CAS number :9016-00-6
CBNumber:CB3696473
Molecular formula :C5H6Si
Molecular weight :94.18664
Melting point :-35°C
Boiling point :155-220°C
Density :0.971
Vapor pressure :5 mm Hg (20 °C)
Refractive index :1.4035
Flash point :63°C
Storage condition :Refrigerator
Solubility :Chloroform (Slightly), Methanol (Slightly)
Form :Viscous Liquid
Specific gravity :0.918
Color :Colorless
Water solubility :INSOLUBLE
Stability :Stable. Flammable or combustible. Flammability depends upon extent of polymerization. Incompatible with strong oxidizing agents.
Industrial sector used as lubricating oil, anti-vibration oil, insulation oil, defoamer, release agent production method 1. Using dimethyldichlorosilane, water and solvent as raw materials, octamethylcyclotetrasiloxane was obtained by hydrolysis, neutralization and fractionation. Under the action of catalyst, octamethylcyclotetrasiloxane was synthesized by polymerization with ChemicalbookMPM. 2. Octamethylcyclotetrasiloxane was obtained from dimethyldichlorosilane, water and solvent raw materials through hydrolysis, neutralization, cracking and fractionation, and then hexamethyldisiloxane was used as the end closed group, the molecular weight was adjusted, and sodium hydroxide or concentrated sulfuric acid was used as the catalyst to polymerize.
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