Specific applications and functions of dimethyl silicone oil
Dimethyl silicone oil is a transparent, colorless, odorless, tasteless, and non-toxic oily liquid. It possesses characteristics such as high flash point, low freezing point, good thermal stability, and resistance to high and low temperatures. It can be used for extended periods at temperatures ranging from -50℃ to +180℃, and can reach 200℃ when used in the absence of air or in an inert gas environment. The oil has very low surface silicone tension, high compressibility, good shear resistance, low viscosity-temperature coefficient, and low dielectric loss; it is arc-resistant, corona-resistant, and non-flammable; it is hydrophobic and moisture-proof, and also has good physiological inertness.
The specific applications and functions of dimethyl silicone oil are as follows:
Due to its low surface tension and insolubility in water, vegetable oils, and high-boiling-point mineral oils, dimethyl silicone oil exhibits good chemical stability and is non-toxic. It is widely used as a defoamer in industries such as chemical, medical, pharmaceutical, food processing, textile, printing and dyeing, and papermaking. Adding just 10-100 PPM of silicone oil provides excellent defoaming effects.
Due to its non-stick properties with rubber, plastics, and metals, dimethyl silicone oil is used as a mold release agent in the molding and processing of various rubber and plastic products, and also in precision casting. Using it as a mold release agent not only facilitates demolding but also leaves the product surface clean, smooth, and with clear textures.
Applying a layer of dimethyl silicone oil to the surface of glass and ceramics, followed by heat treatment at 250-300℃, forms a semi-permanent waterproof, mildew-proof, and insulating film. When used to treat insulating devices, it improves their insulation performance; when used to treat optical instruments, it prevents lenses and prisms from becoming moldy; when used to treat medicine bottles, it extends the shelf life of medicines and prevents loss due to adhesion to the bottle walls; when used to treat the surface of motion picture film, it provides lubrication, reduces friction, and extends the film's lifespan.
Suitable as a lubricant for rubber and plastic bearings and gears. It can also be used as a lubricant for rolling friction between steel at high temperatures, or for friction between steel and other metals. However, because the lubricating performance of methyl silicone oil is not particularly good at room temperature, it is generally not recommended as a lubricant between metals at room temperature.
It can be used as an additive for many materials. For example, it can be used as a gloss enhancer in paints. Adding a small amount of silicone oil to paint can prevent blistering and wrinkling, and improve the gloss of the paint film. Adding a small amount of silicone oil to ink can improve printing quality. Adding a small amount of silicone oil to polishing oil (such as automotive varnish) can increase gloss, protect the paint film, and provide excellent waterproofing.
