There are differences in chemical structure and application fields between ethyl silicone oil and silicone oil.
The following is a detailed explanation of the differences between the two:

1、 Chemical Structure
Ethyl silicone oil:
It is a specific type of silicone oil that contains ethyl groups (i.e. - CH2CH3) in its chemical structure.
The introduction of ethyl groups may occur through specific chemical reactions such as hydrolysis, condensation, molecular rearrangement, and fractionation.
Silicone oil:
Silicone oil is a broader term that includes all lubricating oils with silicone chain links.
The chemical structure of silicone oil can contain various organic groups, such as methyl, ethyl, phenyl, chlorophenyl, trifluoropropyl, etc.
Methyl silicone oil is the most common type of silicone oil, and all its organic groups are methyl.

2、 Application Fields
Ethyl silicone oil:
Mainly used as a release agent for various rubber and plastic products.
Due to its low volatility, low surface tension, non toxicity, non corrosiveness, and aging resistance, it is widely used in insulation materials, precision instrument oil, hydraulic oil, special lubricating oil and other fields in the electrical industry.
Silicone oil:
The application fields of silicone oil are more extensive, including advanced lubricants, shock-absorbing oils, insulating oils, defoamers, release agents, cosmetic raw materials, and many other aspects.
Silicone oil can also be modified according to specific needs, such as methyl hydrogen containing silicone oil, methyl phenyl silicone oil, etc., to meet the application needs of different fields.

3、 Summary
In summary, ethyl silicone oil is a specific type of silicone oil that contains ethyl groups in its chemical structure and has unique physical and chemical properties. Silicone oil, on the other hand, is a broader term that includes all lubricating oils with siloxane chains, and its application fields are also more extensive. In practical applications, it is necessary to choose the appropriate type of silicone oil according to specific needs and conditions.