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Introduction to Silicone Oil

Silicone oil, also known as polysiloxane oil, is a type of organic silicon compound that remains in a liquid state at room temperature. It is primarily composed of silicon and oxygen atoms connected by covalent bonds to form a long-chain structure, with organic groups (such as methyl, ethyl, benzyl, etc.) introduced at the chain ends or side chains to improve its properties. Due to its unique chemical structure and physicochemical properties, silicone oil is widely used in various fields. It is generally colorless (or light yellow), odorless, non-toxic, and has low volatility, with excellent chemical stability, heat resistance, electrical insulation, weather resistance, hydrophobicity, and low surface tension.

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The Development History of Silicone Oil

The history of silicone oil development dates back to the 1940s. Initially, people tried to impregnate fabrics with dimethyl dichlorosilane to achieve a certain waterproof effect. In 1945, Elliott and others at General Electric (GE) in the U.S. discovered that by impregnating fibers with sodium methylsiliconate in an alkaline solution and then heating them, the fibers gained excellent waterproof properties. Since then, the research and application of silicone oil gradually deepened.
In the early 1950s, Dow Corning, a U.S. company, discovered that treating fabrics with polysiloxanes containing Si-H structures not only provided excellent waterproofing but also good breathability. However, the early products had issues such as poor tactile properties, hard and brittle silicone films, and easy peeling. To solve these problems, researchers combined these polysiloxanes with polydimethylsiloxane (PDMS), successfully improving the flexibility and durability of the fabric. As technology continued to advance, the range of silicone oil products expanded, and their performance became even more exceptional.