Types and Applications of Methyl Silicone Oil Methyl silicone oil, also known as polydimethylsiloxane, is a very practical synthetic material with diverse types and a wide range of applications. The following is a detailed introduction to the types and applications of methyl silicone oil

1、 Types
The types of methyl silicone oil can be classified mainly from the following aspects:

According to the relative molecular weight:
Oligomers: with a relative molecular weight of less than 3000, mainly used for thickening and bonding in composite materials.
Mid polymer: with a relative molecular weight between 3000 and 31000, widely used in the production of lubricants and rust inhibitors.
High polymer: with a relative molecular weight exceeding 31000, mainly used for manufacturing high-temperature wear-resistant coatings and silicone rubber.
According to the length of the silicon chain:
Linear methyl silicone oil: The silicon chain has no collateral and the structure is relatively simple.
Branched methyl silicone oil: The silicon chain has branches and a complex molecular structure.
Cyclic methyl silicone oil: The molecular structure is cyclic and can play a unique role in the manufacturing of medical structural materials, microelectromechanical systems, and other fields.
Three dimensional network like methyl silicone oil: with a more complex molecular structure, it is widely used in the manufacture of polymer materials such as coatings, sealants, inks, etc.
According to the curing method:
Heat strengthened methyl silicone oil: It usually needs to be heated at high temperatures to solidify into high-temperature resistant silicone rubber, and is commonly used in the manufacture of high-temperature sealing gaskets, thermal conductive pastes, and other products.
Room temperature curing methyl silicone oil: Under normal circumstances, it does not require heating and can naturally cure into silicone oil by waiting for a certain period of time. It is commonly used in the manufacture of silicone products, cardiovascular intervention products, etc.
According to chemical structure:
Ordinary methyl silicone oil: such as dimethyl silicone oil, etc.
Modified methyl silicone oil: such as methyl phenyl silicone oil, methyl hydrogen containing silicone oil, etc. These silicone oils are obtained by modifying dimethyl silicone oil with other groups or segments, and have specific properties and applications.

2、 Application
Methyl silicone oil has a wide range of applications due to its unique physical and chemical properties:

Insulation, lubrication, shock resistance, and rust prevention: Methyl silicone oil can be used as insulation oil, lubricating oil, shock resistant oil, rust proof oil, etc. It is used as an insulation medium for temperature resistance, arc corona resistance, corrosion resistance, moisture resistance, and dust prevention in the fields of motors, electrical appliances, electronic instruments, etc. It is also used as a liquid shock resistant and damping material in various precision machinery, instruments, and meters.
Defoamer and demoulding: Due to its low surface tension and insolubility in water and various oils, good chemical stability and non toxicity, methyl silicone oil is commonly used as a defoamer and demoulding agent, widely used in industries such as petroleum, chemical, medical, pharmaceutical, food processing, textile, printing and dyeing, papermaking, etc.
Sewing thread treatment: Methyl silicone oil can be used for sewing thread treatment to increase lubrication and prevent breakage on high-speed sewing machines.
Fabric Softening: Methyl silicone oil can also be used for fabric softening, increasing the lubricity, smoothness, fullness, and elasticity of the fabric.
Other applications: Methyl silicone oil is also widely used in building materials, transportation, petrochemicals and other fields, as well as various specialized silicone oils such as hydraulic silicone oil, insulating silicone oil, heat transfer silicone oil, brake silicone oil, etc.
In summary, methyl silicone oil comes in various types and has a wide range of applications. When selecting methyl silicone oil, it is necessary to choose the appropriate type and specification based on specific application scenarios and requirements.