Question 2: What is silicone oil? Silicone oil ... emulsified silicone oil Used in soap-based shower gel. DC 344. Cyclic polydimethylsiloxane. 195. It is highly compatible with various ingredients in cosmetics, reducing the sticky feeling of products. It is used as a solvent and solid powder dispersant for refreshing cream, lotion, facial cleanser, make-up water, cosmetics and perfume.
Silicone oil is a kind of polysiloxane with chain structure with different polymerization degree. It is prepared by hydrolysis of dimethyldichlorosilane with water, and low ring is obtained by ring-opening rectification. Then the ring, sealant and catalyst are put together for telomerization to obtain mixtures with different polymerization degrees, and the low-boiling substances are removed by vacuum distillation to prepare silicone oil.
The most commonly used silicone oil, all organic groups are methyl, is called methyl silicone oil. Organic groups can also replace some methyl groups with other organic groups, thus improving some properties of silicone oil and applying it to various uses. Other common groups are hydrogen, ethyl, phenyl, chlorophenyl, trifluoropropyl and so on. In recent years, organic modified silicone oil has developed rapidly, and many organic modified silicone oils with special properties have appeared.
Silicone oil is generally a colorless (or yellowish), tasteless, nontoxic and volatile liquid. Silicone oil is insoluble in water, methanol, dihydric alcohol and ethoxyethanol, but miscible with benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride or kerosene, and slightly soluble in acetone, dioxane, ethanol and alcohol. It has low vapor pressure, high flash point and ignition point, and low freezing point. With the different number of segments n, the molecular weight increases and the viscosity also increases. Silicone oil can have various viscosities ranging from 0.65 centistoke to several million centistoke. If silicone oil with low viscosity is to be prepared, acidic clay can be used as catalyst for telomerization at 180℃, or sulfuric acid can be used as catalyst for telomerization at low temperature to produce silicone oil or coatings with high viscosity.
Silicone oil can be divided into methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoropropyl silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen silicone oil, hydroxyl hydrogen silicone oil and cyano silicone oil. According to the chemical structure; In terms of use, there are damping silicone oil, diffusion pump silicone oil, hydraulic oil, insulating oil, heat transfer oil, brake oil and so on.
Silicone oil has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertia and small surface tension. In addition, it has low viscosity-temperature coefficient and high compressive strength. Some varieties also have radiation resistance.
Silicone oil products and their applications
Silicone oil has many special properties, such as low temperature-viscosity coefficient, high and low temperature resistance, oxidation resistance, high flash point, low volatility, good insulation, low surface tension, no corrosion to metals, no toxicity and so on. Because of these characteristics, silicone oil has excellent effects in many aspects. Among all kinds of silicone oil, methyl silicone oil is the most widely used and important one, followed by methyl phenyl silicone oil. Various functional silicone oils and modified silicone oils are mainly used for special purposes.
Properties: Colorless, odorless, nontoxic and volatile liquid.
Usage: There are various viscosities. It has high heat resistance, water resistance, electrical insulation and small surface tension. Commonly used as high-grade lubricating oil, shock-proof oil, insulating oil, defoaming agent, release agent, polishing agent and vacuum diffusion pump oil. Methyl silicone oil is the most commonly used. In addition, there are ethyl silicone oil, methyl phenyl silicone oil and silicone oil containing nitrile.
Preparation or source: Oil obtained by hydrolysis and polycondensation of difunctional and monofunctional siloxane monomers.
Question 3: What is silicone oil? Silicone oil is a silicone monomer polymer.
Question 4: Do you know what silicone oil is? Silicone oil usually refers to linear polysiloxane products that remain liquid at room temperature. Generally divided into methyl silicone oil and modified silicone oil. The most commonly used silicone oil-methyl silicone oil, also known as ordinary silicone oil, all its organic groups are methyl, and methyl silicone oil has good chemical stability, good insulation and good hydrophobicity. It is prepared by hydrolysis of dimethyldichlorosilane with water, and low ring is obtained by ring-opening rectification. Then the ring, sealant and catalyst are put together for telomerization to obtain mixtures with different polymerization degrees, and the low-boiling substances are removed by vacuum distillation to prepare silicone oil.
Dimethyl silicone oil has various excellent characteristics, so it is widely used in industrial and agricultural production, national defense industry, scientific research and medical care. Widely used in electrical insulation, demoulding, defoaming, shock absorption, shockproof, rolling, dustproof, waterproof, high and low humidity and so on.
1、
Application in electromechanical industry: Dimethyl silicone oil as insulating medium has the characteristics of temperature resistance, arc corona resistance, corrosion resistance, moisture resistance and dust prevention, and is widely used in motors, electrical appliances and electronic instruments, and is also used as transformers, capacitors and televisions at present.
Impregnating agent for scanning transformer. Used as liquid shock-proof and shock-absorbing materials in various precision machinery and instruments. The damping performance of dimethyl silicone oil is less affected by temperature, and it is mostly used for strong mechanical vibration and environmental temperature changes.
Instruments used in large-scale occasions, such as aircraft and cars. It can be used for shock prevention, shock absorption and instrument reading stabilization, and can also be used as a liquid spring for landing devices of aircraft.
2. As a release agent: because this product is not sticky with rubber, plastic and metal, it is also used as a release agent for molding various rubber and plastic products and for precision casting. Using it as a release agent is not only convenient for demoulding, but also the surface of the product is clean, smooth and clear.
3. As a defoaming agent, this product is insoluble in water, animal and vegetable oil and high-boiling mineral oil because of its small surface tension, good chemical stability and non-toxicity. As a defoamer, it is widely used in petroleum, chemical industry, medical treatment, pharmacy, food processing, textile, printing and dyeing, paper making and other industries. As long as 10- 100PPM silicone oil is added, it will have a good defoaming effect.
4.
Insulation, dustproof and mildew-proof coating: A semi-permanent waterproof, mildew-proof and insulating film can be formed by dipping a layer of dimethyl silicone oil on the surface of glass and ceramics and heat-treating at 250-300℃.
Using it to treat insulating devices can improve the insulating performance of devices: using it to treat optical instruments can prevent lenses and prisms from becoming moldy; Using it to treat medicine bottles can prolong the shelf life of drugs and prevent the preparation from losing because of sticking to the wall; be useful
Managing the surface of the membrane can play the role of lubrication, reduce friction and prolong the life of the membrane. 1. Lubricant: This product is suitable for rubber, plastic bearings and gears. It can also be used as a lubricant for rolling friction between steel at high temperature, or for friction between steel and other metals. However, the performance of methyl silicone oil at room temperature is not particularly good, so it is generally not recommended to be used as a lubricant between metals at room temperature.
5. Additives: This product can be used as additives for various materials. For example, it can be used as a brightening agent for paints. Adding a small amount of silicone oil to the paint can make the paint not float and wrinkle, and improve the brightness of the paint film. Adding a small amount of silicone oil to ink can improve printing quality, and adding a small amount of silicone oil to varnish (such as automobile varnish) can increase brightness, protect paint film and have excellent waterproof effect.
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Application in medical care: Dimethyl silicone oil is non-toxic to human body and is not decomposed by body fluids, so it is also widely used in medical care. Using its defoaming effect, it can be made into oral gastrointestinal Zhang Xiao tablets and pulmonary edema.
Defoaming aerosol and other medical uses. Adding silicone oil to ointment can improve the permeability of drugs to skin and improve the curative effect. Some ointments based on silicone oil have a good effect on burns, dermatitis and bedsores.
It can be used to treat the surface of blood bank and prolong the storage time of blood samples.
7. Other aspects: This product has many uses in other aspects. For example, it is used as a heat carrier in oil bath or thermostat in steel, glass, ceramics and other industries and scientific research by using its characteristics of high flash point, tasteless, colorless, transparent and non-toxic to human body. Because of its good shear resistance, it can be used as hydraulic oil, especially aviation hydraulic oil. Using it to treat rayon spinning head can eliminate static electricity and improve spinning quality. Adding silicone oil to cosmetics can improve the moisturizing and protective effects on skin and so on. ...& gt& gt
Question 5: Shampoo containing silicone oil. What is the name of that silicone oil? There are two main types.
The first type: polydimethylsiloxane, also called dimethylsiloxane alcohol, also called dimethylsilicone oil, also called silicone grease, also called silicone.
The second type: amino polydimethylsiloxane, also known as amino-terminated polydimethylsiloxane, also known as amino-modified polydimethylsiloxane, also known as amino silicone oil, and so on, there are many names, in short, it is the same thing.
Question 6: What is the difference between shampoo containing silicone oil and shampoo without silicone oil? Silicone oil can be used in many places, and the density of products extracted from different places is different. Used in shampoo to make hair soft and smooth. However, if you often have shampoo containing excessive silicone oil, it will precipitate impurities, which is very unfavorable to the health of the head skin and will also cause hair loss. I'm using Klose-Kiss shampoo myself. You can try. Basically, you won't lose a lot of hair.
Question 7: What are the classifications of silicone oil? Five-point silicone oil can be divided into amino silicone oil, epoxy modified silicone oil, carboxyl modified silicone oil, alcohol modified silicone oil, phenol modified silicone oil, mercapto modified silicone oil, acryloyloxy and methacryloyloxy modified silicone oil, methyl long-chain alkyl silicone oil, methyl trifluoromethyl silicone oil and polyether modified silicone oil.
The key is to see what kind of modified silicone oil is used. Now modified silicone oil is widely used. If it is used for fiber treatment and finishing, you can go to Hanke Refinery, hoping to help.
Question 8: What is the main component of silicone oil? The primary form of dimethylcyclosiloxane is an organic-inorganic compound with dimethyldichlorosilane as the main raw material. Through hydrolysis synthesis, the silicon-oxygen (Si-O) bond is the main chain, and the organic group is directly connected with the silicon atom. The molecular structure of primary dimethyl cyclosiloxane is cyclic, mainly including hexamethylcyclotrisiloxane (D3), octamethylcyclopentasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), hexamethylcyclotrisiloxane (D3) and/or octamethylcyclopentasiloxane (D4) and/or decamethylcyclopentasiloxane (D5).
Question 9: What is silicone oil? It's emulsified silicone oil. Shampoo plays the role of coagulation and polishing, making hair bright and shiny. However, silicone oil is a chemical, which has the commonness of other chemicals and has a * * * effect on the skin. The content of ordinary shampoo is very low, and there is no obvious harm to human body below a certain concentration. However, if some silicone oil exceeds the standard, it will have a * * effect on the scalp, leading to hair loss, scalp dryness, itching and so on.
Question 10: What is silicone oil? Its dangerous melting point: -50℃
Boiling point: 10 1 celsius (liter. )
Refractive index: 1.403- 1.406
Flash point: 300℃
Density: 0.963
Water solubility: almost insoluble.
Expansion coefficient (25-100℃): 9.45 *10-4 silicone oil.
Silicone oil is generally a colorless (or yellowish), tasteless, nontoxic and volatile liquid. Silicone oil is insoluble in water, methanol, diol and ethoxyethanol, but miscible with benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride or kerosene, and slightly soluble in acetone, dioxane, ethanol and butanol. It has low vapor pressure, high flash point and ignition point, and low freezing point. With the different number of segments n, the molecular weight increases and the viscosity also increases. Silicone oil can have various viscosities ranging from 0.65 centistoke to several million centistoke. If silicone oil with low viscosity is to be prepared, acidic clay can be used as catalyst for telomerization at 180℃, or sulfuric acid can be used as catalyst for telomerization at low temperature to produce silicone oil or coatings with high viscosity.
Silicone oil has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertia and small surface tension. In addition, it has low viscosity-temperature coefficient and high compressive strength, and some varieties also have radiation resistance.