Polyorganosiloxane with different degree of polymerization chain structure.
Dimethyl dichlorosilane is hydrolyzed to produce the primary polycondensation ring.The ring body is decomposed and rectified to produce the low polycondensation, then the ring body, the head agent and the catalyst are put together to make the mixture with different polymerization degrees. The silicone oil could be obtained by reducing pressure distillation to remove the low boiling point.
Silicone oil is generally colorless (or yellowish-brown), tasteless, non-toxic, non-volatile liquid. Silicone oil is insoluble in water, methanol, dialcohol, and ethoxy ethanol. It is mutually soluble with benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride, or kerosene, and slightly soluble in acetone, dioxane, ethanol, and butanol. It has very low vapor pressure, high flash point and ignition point, and low freezing point. As the number of segments N increases, the molecular weight increases and so does the viscosities. The siloxane may have a variety of viscosities, ranging from 0.65 centistokes to a million centistokes.