Dimethyl silicone oil
The main raw materials of dimethicone oil include silica, hydrogen chloride, organic solvents and so on. Before production, the quality and purity of these raw materials need to be ensured to guarantee the quality of the product. The raw material preparation stage also requires inspection, weighing, mixing and other operations.
– Hydrolysis reaction: Hydrolysis reaction is a key step in the production of silicone oil, in which silica reacts with hydrogen chloride at the appropriate temperature and pressure to produce silanol. The hydrolysis reaction is an exothermic reaction and requires strict control of the reaction conditions to prevent side reactions.
– Cyclization: Silanols further react to form cyclic siloxanes, such as octamethylcyclotetrasiloxane (D4).
– Polymerization: Cyclic siloxanes are polymerized under the action of a catalyst to produce dimethylsiloxane. Commonly used catalysts in the polymerization reaction are sodium hydroxide and platinum catalysts, etc. These catalysts help to improve the yield and reaction efficiency.
– Distillation: The product after the polymerization reaction needs to go through the distillation process to remove the low-boiling substances and impurities, so as to obtain the pure dimethylsiloxane oil.
– Post-treatment: Including stabilization treatment, filtration, packaging and other steps to ensure the stability and quality of the product.
– Raw material supply: This includes the mining and production of raw materials such as silica, carbonaceous reductants, electrode materials, etc., which are the basis for the production of silicone oil. Silica is the key raw material for the preparation of industrial silicon, which is the direct raw material for the production of silicone oil; carbonaceous reductants and electrode materials are used in the production process of industrial silicon.
– Dimethylsiloxane plays a key role in a number of fields due to its outstanding properties, and its applications have spanned from high-end technologies such as aerospace and military to various sectors of the national economy. It is used in a wide range of industries including construction, electrical and electronics, textile, automotive, machinery, leather and paper, chemical and light industry, metals and paints, and pharmaceutical and medical care.
– Including in the electrical and electronic industry as an insulating medium, in the chemical, pharmaceutical, food industry as a heat carrier, as an antifoam agent, as well as in precision machinery and instrumentation used for vibration, damping, lubrication, force transmission and so on.
Dimethicone, also known as polydimethylsiloxane, is a colorless and transparent oily liquid with the following properties:
– Chemical properties: chemical formula C6H18OSi2, molecular weight 162.38, density 0.963 g/mL at 25°C, melting point -59°C, boiling point 101°C, flash point higher than 270°C, almost insoluble in water.
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