What is low temperature vulcanized solid silicone

Low temperature vulcanized solid silicone
Definition and characteristics
Low temperature vulcanized solid silicone refers to silicone that undergoes vulcanization reaction at a vulcanization temperature between room temperature and below 100°C. Its characteristic is that the vulcanization process can be completed at a lower temperature, which is very important for some temperature-sensitive materials or processes. For example, in the packaging process of some electronic components, high temperature may damage the electronic components, and low temperature vulcanized solid silicone can avoid this situation.
This type of silicone usually requires the addition of a special vulcanizer or catalyst to achieve low temperature vulcanization. Its vulcanization process is relatively mild, which can reduce the internal stress that may be generated by high temperature vulcanization, thereby improving the dimensional stability and precision of the product.
Vulcanization system
Vulcanizer type: Commonly used vulcanizers include platinum vulcanizers. Platinum vulcanization is an efficient and environmentally friendly vulcanization method. Compared with traditional peroxide vulcanization, platinum vulcanizers have better activity at low temperatures and can make silicone vulcanize quickly at lower temperatures. Moreover, platinum-vulcanized silicone products perform better in terms of transparency and anti-yellowing properties, and are suitable for products with high requirements for appearance quality, such as medical supplies and accessories for some high-end electronic equipment.
Catalyst role: Catalysts play a key role in the low temperature vulcanization process. For example, in some addition reaction vulcanization systems of hydrogen-containing silicone oil and vinyl silicone oil, catalysts can accelerate the reaction. By adjusting the type and amount of catalyst, the vulcanization speed and degree of vulcanization can be effectively controlled.
Application field
Electronic industry: It is widely used in the packaging of electronic components. For example, in the packaging of semiconductor chips, low-temperature vulcanized solid silicone can provide good protection for the chip without affecting the performance of the chip. It can fill the gaps around the chip to prevent the intrusion of harmful substances such as moisture and dust, and its good insulation performance can ensure the normal operation of the chip.
Medical field: It is used in the manufacture of some temperature-sensitive medical devices. For example, some silicone materials that can be implanted in the human body need to be vulcanized at a lower temperature to avoid the impact of high temperature on material properties and biocompatibility. Low-temperature vulcanized solid silicone can produce soft, comfortable and biosafety-compliant medical devices, such as silicone catheters.
Optical products: It is also used in the packaging and protection of optical lenses. Since optical lenses are sensitive to temperature changes, high-temperature vulcanization may cause lens deformation or optical performance degradation. Low-temperature vulcanized solid silicone can encapsulate the lens at a suitable temperature, provide good buffering and protection, and maintain the optical clarity of the lens.
Performance advantages
Physical properties: Silicone products after low-temperature vulcanization have good elasticity and flexibility. Its tensile strength and tear strength can meet the needs of a variety of application scenarios. For example, in some protective covers of electronic equipment cables that need to be bent frequently, low-temperature vulcanized solid silicone can ensure flexibility while having sufficient strength to prevent breakage.
Chemical properties: It has good chemical stability. It has a certain tolerance to many chemicals, such as acids, alkalis, organic solvents, etc. This allows it to play a role in some application scenarios with more complex chemical environments, such as in some small sealing devices in the laboratory, to prevent the leakage of chemical reagents.