What Are the Different Types of Silicone Fluid?

Silicone oil generally refers to linear silicone 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 of its organic groups are methyl, methyl silicone oil has good chemical stability, insulation, and good hydrophobic properties. It is made from dimethyl dichlorosilane and hydrolyzed to obtain an initial polycondensation ring body. The ring body is cracked and rectified to obtain a low-ring body. A mixture of different polymerization degrees can be obtained by removing low-boiling substances through distillation under reduced pressure.

Melting point: -50 ° C

Boiling point: 101 ° C (lit.)

Refractive index: 1.403-1.406

Flash point: 300 ° C

Density: 0.963g / ml

Water-soluble: PRACTICALLY INSOLUBLE

Expansion coefficient (25-100 ): 9.45 * 10-4 silicone oil

Silicone oil is generally a colorless (or light yellow), odorless, non-toxic, non-volatile liquid. Silicone oil is insoluble in water,

Silicone oil usually refers to

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, small surface tension, non-corrosive to metals, non-toxic and so on. Due to these characteristics, silicone oil has excellent effects in many applications. Among various silicone oils, methyl silicone oil is the most widely used, and it is the most important variety in silicone oil, followed by methylphenyl silicone oil. Various functional silicone oils and modified silicone oils are mainly used for special purposes.

Properties: colorless, odorless, non-toxic, non-volatile liquid.

Uses: There are various viscosities. Have high heat resistance,

Silicone oil has a wide range of applications. It is not only used as a special material in the aviation, cutting-edge technology, and military technology sectors, but also in various sectors of the national economy. Leather paper, chemical light industry, metal and paint, medicine and medical etc.

The main applications of silicone oil and its derivatives are release agents, shock absorbing oils, dielectric oils, hydraulic oils, heat transfer oils, diffusion pump oils, defoamers, lubricants, hydrophobic agents, paint additives, polishing agents, cosmetics and Daily necessities additives, surfactants, particles and fiber treatment agents, silicone grease, flocculants.

Silicone rubber is divided into room temperature vulcanized silicone rubber and high temperature vulcanized silicone rubber. The former is mainly used in sealants, adhesives, conformal coatings, gaskets, foam rubber, molded parts, packaging materials, electrical insulation, glass assembly, medical implants, surgical aids, and molding materials; the latter is mainly used Used in pipes and hoses, strips, wire and cable insulation materials, surgical aids, flame retardant rubber parts, penetration sealing materials, molded parts, embossed rollers, automotive ignition cables and spark plug covers, extrusion parts, medical Implants, laminates, conductive rubber, fiber coatings, foam rubber.

The main applications of silicone resin are varnish, insulating paint, molding compound, protective coating, packaging material, bonding coating, pressure-sensitive adhesive, laminating resin, release agent, adhesive, and masonry waterproofing agent.

Silane coupling agents are mainly used in paints, plastics and rubber processing, and adhesives.

Organic silicon can not only be used as a basic material and structural material in a large number of industries, but also can be used as a supplement or auxiliary material to share with other materials or improve the process performance of other materials.

Silicone oil is used as a breast prosthesis product for women. After being used for more than forty years, silicone oil was found to be likely to cause a decline in human immune function or cause cancer and was banned in Europe and the United States. then,

(1) Observe with eyes: false

A message on the Internet is widely spread: surveys show that people often say that the smoothing agent silicone oil accounts for 90% of domestic shampoos. Although the hair is smooth after use, it will block the hair follicles, cause dry hair and cause hair loss ^[2] .

Once the news spread, people talked about the discoloration of silicone oil and started to choose silicone-free shampoos. Seeing business opportunities, merchants specially launched several shampoos with "silicone-free" as a selling point. However, these "silicone-free" products are generally more expensive than products containing silicon compounds, and the hair is not smooth and combable after use, especially for long-haired women, which indicates that their heads are large ^[2] .

Is Silicone Shampoo Really So Scary? Does silicon-containing shampoo really block pores and cause dry hair and hair loss?

As early as the 1950s, silicon has been used in the cosmetics industry. Today, silicone oil is found in various washing products. Silicone oil has a certain viscosity, ductility, and moisturizing effect. In shampoo, the main effect is lubrication, that is, reducing frictional resistance. In the entire system, silicone oil is relatively stable and will not affect the decontamination ability of the shampoo. ^2] .

Hair is derived from hair follicles in the scalp, and the main component is keratin. When placed under a microscope, you can see uneven hairy skins on top. This kind of fish scale-like thing is hair scales. When there are damaged scales on the hair, the friction between the hairs increases, and the hair begins to tangle together, making it difficult to comb. The reason why silicone oil can make the hair supple is that after shampooing with silicone oil, the scales It will open, and the silicone oil will adhere to the hair scales to fill in the gaps between the hair scales, which will naturally smooth. ^[2]

Internet rumors say that using silicone oil shampoo will block pores. Is this really the case? Silicone oil is a macromolecular substance that cannot be absorbed by hair follicles. Sometimes there are other components in silicone oil and the water solubility has increased. It is even more unlikely that the hair follicles will become clogged. Besides, there is not much silicone oil in shampoos. Said that the content of silicone oil in the shampoo is 1% -2%), a large amount of water rinse, and the role of surfactants for cleaning, there is almost no residue ^[2] .

As for the cause of hair loss, it is even more unfounded. In general, the amount of hair loss between 50-100 roots after each shampoo is normal metabolism, so don't worry too much. There are many reasons for hair loss, such as seborrheic hair loss caused by endocrine factors, hair loss caused by mental stress, and even postpartum hair loss. But so far, no authoritative remarks have confirmed that silicone oil can cause hair loss, and all manufactured products have undergone strict quality testing, and the content of ingredients meets various national regulations, and safety assessments have been made, so consumers can use them with confidence. ^[2] .