What is silicone oil which include introduction、features and usages？
What is Silicone Oil？
It generally refer to linear polysiloxane products that remain liquid at room temperature. Generally divided into two categories: methyl silicone oil and modified silicone oil. The most commonly used it – methyl silicone oil, also known as ordinary silicone oil, its organic groups are all methyl, methyl silicone oil has good chemical stability, insulation, good hydrophobicity.
It is obtained by hydrolyzing dimethyldichlorosilane with water to obtain an initial polycondensation ring body. The ring body is cracked and rectified to obtain a low ring body. A mixture of different degrees of polymerization can be obtained by removing low boilers by distillation under reduced pressure.
It generally refers to silicone oil, and it is generally dimethyl silicone oil. It is a polyorganosiloxane with a chain structure of different degrees of polymerization. It is obtained by hydrolyzing dimethyldichlorosilane with water to obtain an initial polycondensation ring body. The ring body is cracked and rectified to obtain a low ring body. A mixture of different degrees of polymerization can be obtained by removing low boilers by distillation under reduced pressure.
The most commonly used it, all organic groups are methyl, called methyl silicone oil. The organic group can also use other organic groups to replace part of the methyl group to improve certain properties of the silicone oil and apply to various uses. Common other groups are hydrogen, ethyl, phenyl, chlorophenyl, trifluoropropyl and the like. In recent years, organo-modified silicone oil has developed rapidly, and many organo-modified silicone oils with special properties have appeared.
1.Basic Information
Silicone oil is generally colorless (or pale yellow), odorless, non-toxic, and non-volatile liquid. And it is insoluble in water, methanol, glycol and -ethoxyethanol, miscible with benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride or kerosene, slightly soluble in acetone, dioxane, ethanol and alcohol . It has a small vapor pressure, high flash point and ignition point, and low freezing point. As the number of segments n is different, the molecular weight increases and the viscosity increases, so this silicone oil can have various viscosities, from 0.65 centistokes to millions of centistokes.
If low-viscosity silicone oil is to be obtained, acid clay can be used as a catalyst and telomerization at a temperature of 180°C, or sulfuric acid is used as a catalyst to be telomerized at low temperature to produce high-viscosity silicone oil or viscous material. Alkaline can be used. catalyst.
It has heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertness and small surface tension. In addition, it also has low viscosity-temperature coefficient, high compression resistance, and some varieties also have radiation resistance
2.Features
- heat resistance
It have very good thermal stability to thermal oxidation.
- cold resistance
It have very good cold resistance. Cold-resistant phenylmethyl silicone oil has good fluidity even at temperatures as low as -65°C.
- Viscosity Stability
Silicone oil viscosity changes very little, over a wide range of humidity from low temperature to high temperature.
- chemical stability
The chemical stability of organosilicon is very inactive, and its chemical properties are hardly affected in an alkaline aqueous solution below 10% and an acid aqueous solution below 30% at room temperature.
- Corrosion and effects on other materials
It has almost no adverse effects on many materials represented by metals.
- Surface Tension
Compared with water and general synthetic oils, the surface tension of silicone oils is very low.
It is generally colorless (or light yellow), odorless, non-toxic, and non-volatile liquid. Silicone oil is insoluble in water, methanol, glycol and -ethoxyethanol, miscible with benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride or kerosene, slightly soluble in acetone, dioxane, ethanol and butanol .
It has a small vapor pressure, high flash point and ignition point, and low freezing point. As the number of segments n is different, the molecular weight increases and the viscosity increases, so this can have various viscosities, from 0.65 centistokes to millions of centistokes.
If low-viscosity silicone oil is to be prepared, acid clay can be used as a catalyst for telomerization at a temperature of 180°C, or sulfuric acid is used as a catalyst for telomerization at low temperature to produce high-viscosity silicone oil or viscous material with alkaline catalyst.
Silicone oil has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertness and small surface tension, in addition to low viscosity-temperature coefficient, high compression resistance, and some varieties also have radiation resistance performance.
So how to measure silicone oil?
(1) Observation with eyes: fake silicone oil will be cloudy, smelly, and smelly;
(2) Test with fire: use a glass rod or iron rod to ignite a small amount of silicone oil, white mineral oil can be ignited and emit black smoke, pure silicone oil will not burn when ignited with fire, and is odorless, clear and transparent. poison. The ignition point of silicone oil is 320 degrees;
(3) Freezing point test method: Silicone oil will not freeze at -50 degrees, and false silicone oil will appear cloudy or frozen.
And you can also find the answer from here https://www.youtube.com/watch?v=aOUMvG-HRyo
3. Main use
1）Used as insulation, lubrication, shockproof, dustproof oil, dielectric fluid and heat carrier.
After dipping a layer of dimethyl silicone oil on the surface of glass and ceramics, and heat treatment at 250-300 ℃, a semi-permanent waterproof, mildew-proof and insulating film can be formed. It is used to treat insulating devices, which can improve the insulation performance of the device: to treat optical instruments, it can prevent lenses and prisms from getting moldy; to treat medicine bottles, it can prolong the shelf life of drugs, and prevent the loss of preparations due to sticking to the wall; The treated surface can work, reduce friction and prolong the life of the film.
It can also be used as a lubricant in the rolling friction of steel against steel, or as a lubricant when steel is rubbed against other metals. However, because the lubricating performance of methyl silicone oil is not particularly good, in general, it is not recommended as an intermetallic lubricant at room temperature. lubricant.
2）Used as an additive for defoaming, film release, paint and daily cosmetics.
Because this product has low surface tension and is insoluble in water, animal and vegetable oils and high-boiling mineral oils, it has good chemical stability and is non-toxic. It has been widely used as a defoaming agent in petroleum, medical, pharmaceutical, food processing, textile , printing and dyeing, papermaking and other industries, as long as 10-100PPM of silicone oil is added, it will have a good defoamer effect.
3）It is used for the processing of sewing thread, increasing lubrication, and can keep threading on high-speed sewing machine.
4）It is used for soft finishing of fabrics, increasing the lubricity of fabrics, and increasing the smoothness, fullness and elasticity of fabrics.
5）Because this product is not sticky with rubber, plastic, metal, etc., it is also used as a mold release agent for various rubber and plastic products molding and processing, and in precision casting. Using it as a mold release agent is not only convenient for mold release, but also makes the surface of the product clean, smooth and clear in texture.
6）It is widely used in motors, electrical appliances, and electronic instruments as an insulating medium for temperature resistance, arc corona resistance, corrosion resistance, moisture resistance and dust resistance.
It is used as liquid shockproof and damping material in various precision machinery, instruments and meters. The shock absorption performance of dimethyl silicone oil is less affected by temperature, and it is mostly used in instruments such as aircraft and automobile instruments in occasions with strong mechanical vibration and large changes in ambient temperature. For shock resistance, damping, stabilizing instrument readings, and also as a liquid spring, and in aircraft landing gear.
It is widely used in electronic appliances, building materials, motor manufacturing, transportation, petrochemicals, textiles, printing and dyeing, thread making, various polyester and polyester-cotton, polyester-rayon textiles to improve the after-finishing of smoothness and elasticity, as well as medical and health care , aviation scientific research and military technology.
It has various excellent properties, so it has been widely used in various departments of industrial and agricultural production, defense industry, scientific research and medical and health departments. It is widely used in electrical insulation, demoulding, defoaming, damping, rolling, dustproof, waterproof, high and low humidity, etc.
4.Dangers of silicone oil:
It is flammable, and the vapor can form a mixture with air. In case of high heat, open flame, and oxidant, there is a danger of burning. Secondly, the viscosity of the liquid is generally very small, not only is it easy to flow, but also due to infiltration, infiltration and capillary phenomena With only very fine cracks, flammable liquids can also seep out of the container walls.
Generally, it is group III packaging. It is usually packed in barrels, most of which are 25KG per barrel. It should be stored in fire prevention, avoid sunlight exposure, and handle with care to prevent damage to the package. Store in a cool, ventilated warehouse. Keep away from fire and heat sources. should be kept away from oxidizer, do not store together. Use explosion-proof lighting and ventilation facilities. Prohibit the use of mechanical equipment and tools that are prone to sparks.
When silicone oil is exported as Category 3 dangerous goods, it is different for ships berthing at Tinstao Port and ships in outer ports. It should be noted that:
When the ship is berthing in Yangshan, the goods needs to be loaded directly beside the ship. Dangerous goods are different from general cargo. General cargo can be sent to the port after opening, while silicone oil, as Category 3 dangerous goods, cannot be directly sent to the port when it is loaded.
If it is a trailer, it may be too late to go to the factory to load the container until there is a plan, so try to take the box to the factory to load the container when the shipping date is approaching, and then unpack it after returning, and then send it to the ship when there is a plan. A drop-off fee. In addition, Yangshan declares customs first and then enters the port, so it is necessary to connect various time points. Shanghai Shunxin International Logistics has many years of experience in the operation of dangerous goods, and you can consult if you need it.
2. When the ship berths at the outer port. In the same way, Class 3 dangerous goods in the outer port cannot enter the port directly, which is different from the direct loading on the ship in Yangshan. When the silicone oil is shipped to the outer port, it needs to be packed in a container and sent to the national dangerous warehouse. Sending dangerous warehouses will generate additional dangerous warehouse costs, and sometimes spraying costs will be incurred when the temperature is high.
Jinan Hongquan Titanium Industry Co., Ltd., as a supplier of exporting silicone oil for many years, has rich experience in exporting 3 types of dangerous goods by sea , dangerous goods declaration, shipping export booking, etc., according to the shipping time and port of destination requirements, timely shipping booking, dangerous goods approval, to ensure the time and efficiency of shipping.By choosing us, you can be assured of the delivery time and product quality, and we have a professional service team to ensure that you complete the transaction smoothly.
If you want to buy Silicone oil for these usages visit https://jnhqty.en.alibaba.com. The actual iron oxide price is still a single negotiation based on the order, the quantity, and the form of payment.
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The company’s products have been demonstrated by well-known national experts, and the conclusion is: “technological innovation is strong, improves the performance and utilization of pigments, reduces dosage, saves resources, economic benefits, no environmental pollution, in line with national industrial promotion and development strategies”.
