Silicone oil is a general term for a class of polysiloxane compounds, which can be divided into non-ionic silicone oil, cationic silicone oil, and anionic silicone oil. Among them, non-ionic silicone oil includes different varieties, such as methyl silicone oil, hydroxyl silicone oil, epoxy silicone oil, hydrogen-containing silicone oil, polyether silicone oil, etc. Cationic silicone oil includes amino silicone oil and polyether amino silicone oil, etc. Anionic silicone oil can be divided into Carboxylated silicone oil and carboxylated polyether silicone oil. Different types of silicone oils often exhibit different structural characteristics and application fields.
1. Characteristics and application of non-ionic silicone oil
High-viscosity methyl silicone oil and hydroxy silicone oil: There are no polar functional groups in their structure, and they are usually used as smoothing components, such as smoothing agents, daily chemical shampoos and hair conditioners in the textile industry. Low-viscosity epoxy silicone oil is divided into two types: end group and side chain. The epoxy silicone oil widely used in industry is mainly end group type, with a molecular weight of 4000-20000 and an epoxy group content of about 0.01%~0.05%. In the synthesis of block polyether amino silicone oil. Side-chain type hydrogen-containing silicone oil is mainly used as a cross-linking component of silicone smoothing additives such as knitted sweaters and woolen sweaters, and can also be used as a synthetic raw material for side-chain polyether silicone oil; terminal-type hydrogen-containing silicone oil is often used as a hydrosilylation The reaction raw materials to synthesize various polyether silicone oil and other compounds. Polyether silicone oil refers to the polyether segment connected to the main chain or side chain of the silicone oil, so it has good hydrophilicity, moisture absorption, and antistatic properties. It is used in daily chemicals, personal skin care products, defoamers, softeners, etc. There are a wide range of applications.
2. Characteristics and application of cationic silicone oil
The side chain or terminal carbon of polysiloxane is connected with aliphatic or aromatic amino groups. The presence of amino groups in the molecular structure can increase the molecular polarity and emulsification performance, which is conducive to making amino silicon with fine particle size and good permeability. Transparent silicon microemulsion; amino groups are neutralized and then converted into ammonium ions to charge the silicone oil/silicon emulsion, which is not only beneficial to the stability of the silicon emulsion, but also increases the amount of polysiloxane adsorbed on the fiber surface, so that the silicone oil produces excellent softness, Lubricated feel.
3. Characteristics and application of anionic silicone oil
Terminal type vinyl/carboxyhydroxyl co-modified silicone oil: the configuration of silicone modified acrylic resin emulsion and exterior wall paint can increase the smoothness of the coating surface and improve the dustproof and antifouling performance of the coating.
Silicone oil is a highly versatile liquid substance, the main application areas are as follows:
1. Cosmetics industry: In the cosmetics industry, silicone oil is a commonly used ingredient because of its unique properties such as high moisture resistance, smooth texture and non-greasy feel. It is commonly found in skin care and hair care products such as body creams, serums, shampoos and conditioners. The high moisture resistance of silicone oils helps prevent moisture loss, making them a popular ingredient in moisturizing products. The smooth texture of silicone oil also makes it an ideal ingredient in products designed to reduce fine lines and wrinkles, while its non-greasy feel makes it a popular choice for products that control oil production.
2.Construction industry: In the construction industry, silicone oil is often used as a sealant and waterproofing agent. Its unique properties, such as high temperature resistance, flexibility and weather resistance, make it ideal for use in a variety of building materials and structures. For example, it is commonly used to seal roofs, foundations and windows, and to provide a water barrier in bathrooms and kitchens. Silicone oils are also used as release agents in the production of concrete products, helping to prevent sticking to molds and forms. In addition, it is used as a lubricant for machinery and equipment in the construction industry, helping to reduce friction and wear.
3.Plastic industry: In the plastic industry, silicone oil is used as plasticizer and lubricant. It helps to improve the processing and flow characteristics of plastic materials, making it easier to shape the material into the desired product. Silicone oils also help reduce friction and wear during machining, extending the life of equipment and machinery. In addition, it can be added to plastic products to improve their physical properties such as flexibility and weather resistance. In some cases, it can also be used as a mold release agent to prevent adhesion between the plastic material and the mold. The high temperature resistance of silicone fluids makes them well suited for high temperature processing applications such as extrusion and injection molding.
4.Polyurethane industry: Silicone oil is often used as a foam stabilizer in polyurethane foaming systems. It can not only promote the formation of bubble nuclei in the initial stage of foaming, play a role in regulating the cell structure, but also improve the compatibility of various components of raw materials. It plays an emulsifying and stabilizing role in the pre-mixing and foaming process of the combined polyether, effectively eliminates the bean holes on the foam surface, and improves the surface properties. The silicone oil here usually refers to non-ionic allyl polyether modified silicone oil, which can be foamed and applied in various fields, such as household sponges, pipe insulation, refrigerator freezers, car seat cushions, etc.
5.Food industry: In the food industry, silicone oil is used as a food-grade lubricant and release agent. It is used in the manufacture of food packaging, such as baking sheets and molds, to prevent food from sticking and to make it easier to release. Silicone oils are also used in food processing equipment, such as conveyor belts, to reduce friction and improve material flow. In addition, it can also be used as a food ingredient in some special applications. For example, it is used as a defoamer in beer and other fermented beverages to reduce the formation of foam during processing. Silicone oil is also used as a release agent in some confectionery products, such as fondant, to prevent the candies from sticking to each other or to production equipment. It should be noted that not all silicone oils are suitable for food applications. Only food-grade silicone oil approved by US FDA and other regulatory agencies can be used in food processing and packaging.
