What is Silicone oil?

Silicone oil usually refers to linear polysiloxane products that remain liquid at room temperature. The structural formula is as follows: In the formula, R is an alkyl group, an aryl group, and R’ is an alkyl group, an aryl group, hydrogen, a carbon functional group, a polyether chain, etc. ;

Silicone oils come in a variety of viscosities. It has high heat resistance, water resistance, electrical insulation and low surface tension. It is commonly used as high-grade lubricating oil, anti-shock oil, insulating oil, defoaming agent, release agent, polishing agent, isolating agent and vacuum diffusion pump oil, etc.; the emulsion can be used for car tire glazing, instrument panel glazing, etc. Methyl silicone oil is the most commonly used.

After emulsification or modification, it is used for smooth and soft touch finishing of textiles. Emulsified silicone oil is also added to shampoos of daily care products to improve the lubrication of hair. In addition, there are ethyl silicone oil, methylphenyl silicone oil, nitrile silicone oil, polyether modified silicone oil (water-soluble silicone oil), etc.

Silicone oil has a wide range of applications. It is not only used as a special material in aviation, cutting-edge technology, and military technology sectors, but also in various sectors of the national economy. Its application scope has expanded to: construction, electronics and electrical, textiles, automobiles, machinery, Leather and paper making, chemical and light industry, metal and paint, medicine and medical treatment, 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, defoaming agents, lubricants, hydrophobic agents, paint additives, polishes, cosmetics and Daily necessities additives, surfactants, particle and fiber treatment agents, silicone grease, flocculants.

Silicone oil Classification

The most commonly used silicone oi is called methyl silicone oil. Organic groups can also use other organic groups to replace part of the methyl groups to improve certain properties of the silicone oil and apply it to various uses. Common other groups include hydrogen, ethyl, phenyl, chlorophenyl, trifluoropropyl, etc. In recent years, organically modified silicone oil has developed rapidly, and many organically modified silicone oils with special properties have appeared.

Silicone oil is 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 according to the chemical structure. Silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen silicone oil, hydroxyl hydrogen silicone oil, cyanide silicone oil, etc.; in terms of use, there are damping silicone oil, diffusion pump silicone oil, hydraulic oil, insulating oil, Heat transfer oil, brake oil, etc.

Silicone oil modification

The most commonly used silicone oi is called methyl silicone oil. Organic groups can also use other organic groups to replace part of the methyl groups to improve certain properties of the silicone oil and apply it to various uses. Common other groups include hydrogen, ethyl, phenyl, chlorophenyl, trifluoropropyl, etc. In recent years, organically modified silicone oil has developed rapidly, and many organically modified silicone oils with special properties have appeared.

Silicone oil is 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 according to the chemical structure. Silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen silicone oil, hydroxyl hydrogen silicone oil, cyanide silicone oil, etc.; in terms of use, there are damping silicone oil, diffusion pump silicone oil, hydraulic oil, insulating oil, Heat transfer oil, brake oil, etc.

Single-terminated silicone oil

Product nameProduct noChemical structure
Single hydrogen terminated polydimethylsiloxaneHDK-H101

Single hydrogen terminated polydimethylsiloxane

Single-ended vinyl-terminated polydimethylsiloxaneHDK-V102Single-ended vinyl-terminated polydimethylsiloxane
Single-end hydroxyl-terminated polydimethylsiloxaneHDK-Q103Single-end hydroxyl-terminated polydimethylsiloxane
Single-terminated ethylene glycol monoallyl ether-terminated polydimethylsiloxaneHDK-Q203Single-terminated ethylene glycol monoallyl ether-terminated polydimethylsiloxane
Trimethoxysilyl mono-terminated polydimethylsiloxaneHDK-M104Trimethoxysilyl mono-terminated polydimethylsiloxane
Methacryloyloxypropyl mono-capped polydimethylsiloxaneHDK-211Methacryloyloxypropyl mono-capped polydimethylsiloxane
Methacryloyloxybutyl mono-terminated polydimethylsiloxaneHDK-212Methacryloyloxybutyl mono-terminated polydimethylsiloxane
Glycidoxy mono-terminated polydimethylsiloxaneHDK-E105Glycidoxy mono-terminated polydimethylsiloxane
Polyethylene glycol modified mono-capped polydimethylsiloxaneHDK-Q303Polyethylene glycol modified mono-capped polydimethylsiloxane
Dihydroxy mono-terminated polydimethylsiloxaneHDK-Q403Dihydroxy mono-terminated polydimethylsiloxane
Polyethylene glycol amino ester modified mono-terminated polydimethylsiloxaneHDK-A213Polyethylene glycol amino ester modified mono-terminated polydimethylsiloxane
p-Benzylphenylethyl mono-capped polydimethylsiloxaneHDK-B105p-Benzylphenylethyl mono-capped polydimethylsiloxane

Double-terminated silicone oil

Hydrogen double-terminated polydimethylsiloxaneHDK-H201Hydrogen double-terminated polydimethylsiloxane
Vinyl double-terminated polydimethylsiloxaneHDK-V202 Vinyl double-terminated polydimethylsiloxane
Hydroxyl double-terminated polydimethylsiloxaneHDK-Q203 Hydroxyl double-terminated polydimethylsiloxane
Hydroxyethoxypropyl double-capped polydimethylsiloxaneHDK-Q303 
Trimethoxyethyl double-capped polydimethylsiloxaneHDK-A204 Trimethoxyethyl double-capped polydimethylsiloxane
Methacryloyloxypropyl double-capped polydimethylsiloxaneHDK-J205 Methacryloyloxypropyl double-capped polydimethylsiloxane
Methacryloyloxybutyl double-capped polydimethylsiloxaneHDK-J305 Methacryloyloxybutyl double-capped polydimethylsiloxane
Glycidoxy double-terminated polydimethylsiloxaneHDK-H206 Glycidoxy double-terminated polydimethylsiloxane
Dihydroxydouble-terminated polydimethylsiloxaneHDK-Q403 Dihydroxydouble-terminated polydimethylsiloxane
Polyethylene glycol amino ester modified double-terminated polydimethylsiloxaneHDK-A207 Polyethylene glycol amino ester modified double-terminated polydimethylsiloxane
Aminopropyl double-capped polydimethylsiloxaneHDK-A102 Aminopropyl double-capped polydimethylsiloxane
Ethyl epoxycyclohexane double-capped polydimethylsiloxaneHDK-H208 

Side chain silicone oil

Methyl double-terminated side chain hydrogen-containing polydimethylsiloxaneHDK-H101 Methyl double-terminated side chain hydrogen-containing polydimethylsiloxane
Methyl di-terminated side chain vinyl polydimethylsiloxaneHDK-V102 Methyl di-terminated side chain vinyl polydimethylsiloxane
Methyl di-terminated side chain aminopropyl polydimethylsiloxaneHDK-A103 Methyl di-terminated side chain aminopropyl polydimethylsiloxane
Methyl di-terminated side chain methyl polydimethylsiloxaneHDK-B104 Methyl di-terminated side chain methyl polydimethylsiloxane
Methyl di-terminated side chain diphenyl polydimethylsiloxaneHDK-B204 Methyl di-terminated side chain diphenyl polydimethylsiloxane
Methyl di-terminated side chain methacryloxypropyl polydimethylsiloxaneHDK-J105 
Methyl double end-capped side chain ethylenediaminepropyl polydimethylsiloxaneHDK-A203 Methyl double end-capped side chain ethylenediaminepropyl polydimethylsiloxane
Methyl double end-capped side chain polyethylene glycol modified polydimethylsiloxaneHDK-E106 Methyl double end-capped side chain polyethylene glycol modified polydimethylsiloxane
Methyl double end-capped side chain trifluoropropyl polydimethylsiloxaneHDK-F107 Methyl double end-capped side chain trifluoropropyl polydimethylsiloxane
Methyl double end-capped side chain mercaptopropyl polydimethylsiloxaneHDK-S108 Methyl double end-capped side chain mercaptopropyl polydimethylsiloxane
Methyl di-terminated side chain acryloyloxypropyl polydimethylsiloxaneHDK-J205 Methyl di-terminated side chain acryloyloxypropyl polydimethylsiloxane
Vinyl double-terminated side chain vinyl polydimethylsiloxaneHDK-V202 Vinyl double-terminated polydimethylsiloxane

T-type silicone oil

Side chain phenylmethyl end-capped silicone oil
Hydrogen-capped branched silicone oil
Vinyl POS and its modified silicone oil

Amino-modified silicone oil is polydimethylsiloxane containing amino groups in the side chain or end group, also known as amino silicone oil. This type of silicone oil is the basic ingredient specifically used in textile softening agents. Due to its good adsorption and compatibility, when amino silicone oil is emulsified into a microemulsion by an appropriate surfactant, it can be used for fabric finishing to increase the softness of fiber materials. Therefore, it is used as a fabric softening finishing agent and is suitable for In the finishing of various textiles, amino silicone oil can also be used in cosmetic additives, coating additives, resin modifiers, brighteners and other fields.

A type of silicone oil containing epoxy groups in the side chains or end groups of polydimethylsiloxane is called epoxy modified silicone oil. The use of this type of modified silicone oil can improve the elasticity of fabrics. If this type of silicone oil is used in conjunction with polyether-modified silicone oil, the finished fabric will have better softness, anti-wrinkle, washability and other properties. It is blended with amino-modified silicone oil. Use it to make the fabric have a better feel.

Polydimethylsiloxane containing polyether groups (polyoxyethylene group, polyoxypropylene group, fatty alcohol polyoxyethylene polyoxypropylene ether group) in the side chain or terminal group is called polyether modified silicone oil. It can improve the moisture absorption properties of fabric finishing. Since the polyether group is hydrophilic, the hydrophilicity of the polyether silicone oil increases. There are both hydrophobic groups and hydrophilic groups in the molecule, so that this type of silicone oil shows better water solubility and does not need to be used during use. Problems such as emulsification and oil drift may occur. Secondly, the introduction of polyether groups also increases the hygroscopicity, antistatic properties, and easy decontamination of the fibers or fabrics to be treated, so polyether silicone oil is widely used in clothing softeners, cosmetics, and shampoo products. Another main use of polyether silicone oil is as a surfactant for polyurethane foam stabilizer, also known as foam stabilizer, to adjust the bubble drop of polyurethane foam. Polyether silicone oil is the most widely used and most effective type of active silicone softener before the development of amino silicone oil softeners.

Polydimethylsiloxanes containing carboxyl groups in the side chains or terminal groups are called carboxyl modified silicone oils. This type of modified silicone oil can be used as fiber treatment agents, car polishes, paint additives, etc. The combination of carboxyl modified silicone oil and amino silicone oil can increase the durability when used for fiber treatment and will not easily fall off during washing.

Polydimethylsiloxane that is end-capped with alcoholic hydroxyl groups or contains alcoholic hydroxyl groups in the main chain is called alcoholic hydroxyl-modified silicone oil. Since the light groups at the end of the molecular main chain or between the molecular chains are reactive, they can be cross-linked when heated. This type of silicone oil can be used as a structural control agent in silicone rubber processing, and can also be used for anti-blooming treatments such as paper. Replacing part of ethylene glycol with alcohol-hydroxyl modified silicone oil for copolymerization can improve the resilience, softness, tear strength, abrasion resistance, heat resistance and other properties of polyurethane fibers and films. It can also improve polyurethane fibers and films. formability.

Polydimethylsiloxanes that are end-capped with phenol hydroxyl groups or contain phenol hydroxyl groups in the main chain are phenol-based modified silicone oils. The phenol group in this type of modified silicone oil molecules has high reactivity and heat resistance, so its emulsion has good stability and wide usability. If amino-modified silicone oil is mixed with phenol-modified silicone oil, it can be compounded into an oil for synthetic fibers with excellent heat resistance and mold release properties.

Polydimethylsiloxane containing mercapto groups in the side chains or terminal groups is called mercapto-modified silicone oil. The mercapto groups in its molecules can react with organic silicone containing unsaturated bonds under the action of ultraviolet rays and photopolymerization initiators. Compounds undergo free radical addition reactions. This type of silicone oil is the main component of ultraviolet and electron beam curable silicone resin rubber. It is widely used in anti-stick isolation coatings and can also be used as a release agent.

In addition to the above modified silicone oils, there are many other types of silicone oils, such as polydiorganosiloxane-polyether block copolymer modified silicone oil, alkyl and polyether co-modified silicone oil, alkyl ether polyether silicone oil, cyclic silicone oil, etc. Oxygen-based polyether silicone oil, amino polyether block silicone oil, glyceryl ether-based silicone oil, phosphate ester-based silicone oil, sugar-based polyether silicone oil, betaine-based silicone oil, etc. These silicone oils have different functional groups and therefore have special properties, but due to low demand, they have a small market share.

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