An Overview of Dimethyl Silicone Oil

HongQuan
April 21, 2022
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An Overview of Dimethyl Silicone Oil

1.Basic Information

Dimethyl silicone oil is generally colorless (or pale 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 alcohol .

Dimethyl silicone oil 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.

Dimethyl silicone oil 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.Feature

Dimethyl silicone oil is odorless and non-toxic, has physiological inertness, good chemical stability, electrical and weather resistance, wide viscosity range, low freezing point, high flash point, good hydrophobicity, and high shear resistance. Long-term use at 50-180oC temperature, widely used as insulation, lubrication, shock-proof, dust-proof oil, dielectric fluid and heat carrier, as well as additives for defoaming, film release, paint and daily cosmetics.

Easy to apply and erase, easy to polish
have very good cold resistance. Cold-resistant phenylmethyl silicone oil has good fluidity even at temperatures as low as -65°C.
Resistant to oxidation, chemicals, and weather
High damping effect
Silicone oil viscosity changes very little, over a wide range of humidity from low temperature to high temperature.
High dielectric strength
good thermal stability
Intrinsically odorless, tasteless, nontoxic, soluble in many solvents
High water repellency, high compressibility, high spreadability and compatibility
Low environmental hazard, low fire hazard, low reactivity and vapor pressure, low surface energy
Silicone oil viscosity changes very little, over a wide range of humidity from low temperature to high temperature.
Compared with water and general synthetic oils, the surface tension of silicone oils is very low.

3. chemical application

Dimethicone 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, shockproof, rolling, dustproof, waterproof, high and low humidity, etc.

1) Application in electromechanical industry

Dimethyl silicone oil 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. Wait. 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.

2) as defoamer

As a defoaming agent, because dimethyl silicone oil 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. As a defoaming agent, it has been widely used in petroleum, chemical, medical , pharmaceutical, food processing, textile, printing and dyeing, papermaking and other industries, as long as 10-100PPM of silicone oil is added, it has a good defoaming agent effect.

3) as a release agent

As a release agent, due to the non-stickiness of dimethyl silicone oil and rubber, plastic, metal, etc., it is also used as a release agent for the molding of various rubber and plastic products, 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.

4) For insulating, dust-proof, mildew-proof coating

For insulating, dust-proof and mildew-proof coating, dip-coating a layer of dimethyl silicone oil on the surface of glass and ceramics, and heat treatment at 250-300 ℃, can form a semi-permanent waterproof, mildew-proof and insulating layer film. 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; It can lubricate the surface of the film, reduce friction and prolong the life of the film.

5) as lubricant

Dimethyl silicone oil is suitable as lubricant for rubber, plastic bearings and gears. It can also be used as a lubricant for steel-to-steel rolling friction at high temperature, or as a lubricant for 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 for use at room temperature. Intermetallic lubricant.

6) Application in health care

Dimethyl silicone oil is non-toxic to the human body and is not decomposed by body fluids, so it is also widely used in medical and health services. Utilizing its defoaming effect, the oral gastrointestinal defoaming tablet and the pulmonary edema defoaming aerosol have been prepared for medicinal purposes. Adding silicone oil to the ointment can improve the penetration ability of the drug into the skin and improve the efficacy of the drug. Some ointments based on silicone oil have good curative effects on scalds, dermatitis, bedsores, etc.

The anticoagulant effect of silicone oil can be used to treat the surface of the blood reservoir and prolong the storage time of blood samples. Also acts as a condom wet lubricant, and it does not kill sperm.

7) as an additive

However, with the technology used in chemical coloring engineering, there are many other uses. Listen to what the Dimethyl silicone oil manufacturer (Great Spring)has to say. Dimethyl silicone oil has many other uses. For example, using its high flash point, odorless, colorless, transparent and non-toxic to human body, it can be used as a heat carrier in oil baths or thermostats in steel, glass, ceramics and other industries and scientific research.

Using 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 the quality of spinning. Adding silicone oil to cosmetics can improve the moisturizing and protective effect of the skin and so on.

4.How to use it

It is a transparent liquid, with a small temperature coefficient, good electrical properties, good electrical insulation properties, and excellent freeze resistance, heat dissipation, and oxidation resistance. The long-term use temperature is -50℃~200°C.

Dimethyl Silicone Oil is widely used as a release agent for various materials such as plastics, because of its excellent high and low temperature resistance, light transmission, electrical properties, water irritability, moisture resistance, chemical stability and low volatility. Therefore, it is widely used for high temperature operation release of large moldings, such as phenolic resin and unsaturated polyester laminates. In order to meet different needs, silicone oil is usually processed into different forms such as solution, emulsion and silicone paste.

Moreover, taking simethicone water before capsule endoscopy can effectively remove air bubbles in the small intestine. Simethicone can improve the clarity of the observation of the small intestine mucosa during capsule endoscopy, and is related to its dosage. It has no effect on the passage time of the small intestine. Influence. a solution. Dissolve silicone oil in carbon tetrachloride, toluene or xylene to make a solution with a concentration of 0.5%~2%. Suitable for use at 60~110℃.

Emulsion.It is prepared from methyl phenyl silicone oil, emulsifier and water. It is diluted to 0.5%~2% when used. It is suitable for processing temperature above 120℃ and products with complex shapes.

Silicone paste. It is smelted from silicone oil and ultra-fine silica. Good heat resistance, suitable for large dry surface area, smooth mesh and simple shape product.

Methyl phenyl silicone oil The full name of methyl phenyl silicone oil is polymethyl phenyl siloxane, colorless or light yellow oily liquid. The relative density is 1.00~111(23℃). Physical properties vary with composition and molecular weight, density and refractive index increase with increasing phenyl content: The freezing point of dimethyl Silicone Oil with low phenyl content is below -70°C: Thermal stability of medium and high phenyl content silicone oils It is greatly improved, the oxidation stability is also greatly improved, and it also has good radiation resistance.

5.How to clean

When cleaning dimethyl silicone oil, too high viscosity silicone oil is also difficult to clean, so the cleaning silicone oil must have the following characteristics:

Silicone oil with low viscosity such as below 1000
Make sure that the silicone oil is not cured, and the cured silicone oil is difficult to wash off
Make sure it is silicone oil and there is no other oil stains.

For the cleaning of silicone oil, various cleaning agents emerge in an endless stream in the industry and are applied to different production and processing. Silicone oil cleaning agent can effectively clean uncured low-viscosity silicone oil stains without adversely affecting the surface of the workpiece.

The use of Angsheng dimethyl silicone oil cleaning agent is recommended to be used with ultrasonic cleaning. However, cleaning methods such as spraying (large products), soaking and other cleaning methods are also used in different industrial scenarios. 1:10-50 open diluted before use, the water temperature can be controlled at 50-60 degrees Celsius, rinse with water after cleaning, and dry it, in the fields of precision electronic components, clean clothes, rubber gloves, etc. Get a good application.

6，How to messure dimethyl 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.

If you want to buy Dimethyl silicone oil for cement please visit https://jnhqty.en.alibaba.com. The actual price about dimethyl silicone oil is still a single negotiation based on the order, the quantity, and the form of payment.

Jinan Hongquan Titanium Industry Co., Ltd. is located in Jinan, a beautiful spring city. The company’s scientific research personnel sincerely cooperate with well-known domestic universities and various titanium dioxide production enterprises to study and produce active titanium dioxide pigments with great concentration. Some of its products have been widely used in chemical, textile, paper, plastic, paint and other production fields.

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”.

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