New developments in silicone rubber industry: innovation and application drive

1. The new silicone rubber raw material patent came out, and the performance was significantly improved
Recently, the State Intellectual Property Office published an important patent on silicone rubber. The patent focuses on silicone rubber raw materials, silicone rubber and its preparation methods, as well as related product applications, such as engine cooling pipes and automotive fields. This silicone rubber raw material is unique in the formula, including a variety of methyl vinyl silicone rubber raw rubber, as well as white carbon black, hydroxyl silicone oil, methoxy silicone oil and other components.
It is worth mentioning that by using conventional silica as a reinforcing agent, and without adding additional additives, the newly prepared silicone rubber shows excellent high temperature resistance and anti-aging properties. Not only that, it also has high plasticity, good processing properties of non-stick rollers, and long storage time. This innovation is expected to open up a broader space for the application of silicone rubber in high temperature and complex environments.

2. Food grade silicone rubber standard adjustment, supervision refinement
On September 25, 2023, the National Health Commission issued a notice to update the standards for rubber materials and products used in food contact, and the new standard GB4806.11-2023 was formally implemented on September 6, 2024. One of the major changes in the adjustment of the standard is that silicone rubber materials and products are no longer included in the scope of application of the original standard, but are separately managed.
In addition, the raw material requirements have added provisions on the use of additives, and increased the total number of aromatic primary amines, N-nitrosamines and N-nitrosamines can be migrated total number of general physical and chemical indicators. This series of adjustments are aimed at further standardizing the production and use of food-grade silicone rubber to ensure the health and safety of consumers. With the refinement of the standard, relevant enterprises need to adjust the production process and quality control process in a timely manner to adapt to the new regulatory requirements.

3. Silicone rubber helps UHV thyristor localization
In the field of energy, the Guangzhou Bureau of the ultra-high voltage transmission Company of the Southern Power Grid led a number of domestic enterprises to tackle the weak links in the UHV thyristor industry chain. Previously, the silicon rubber raw materials used for UHV thyristor chip junction terminal protection mostly relied on imports, and there were failures caused by the adhesion problem between silicon rubber and thyristor junction terminal modeling table.
To this end, the project team organized a number of silicone rubber production enterprises and successfully developed silicone rubber suitable for UHV thyristors. Compared with imported products, the domestic silicone rubber tensile strength increased by 25%, shear strength increased by 54.4%, paste protection ability is better, and passed the national testing center test. At the same time, the domestic silicone rubber-protected UHV thyristors developed jointly with related enterprises also successfully passed a number of strict type tests, and realized the overall domestic production of thyristors. This achievement not only fills the gap in China's thyristor silicone rubber industry chain, but also improves the autonomous controllable ability of UHV converter valve thyristors, providing strong support for the development of China's electric power industry.

4. The application of silicone rubber has been expanded to medical, automotive and other fields
With its excellent performance, the application of silicone rubber in medical, automotive and other industries continues to expand. In the medical field, with its biocompatibility, chemical stability and other characteristics, silicone rubber is widely used in the manufacture of medical devices, such as artificial joints, infusion tubes, breast implants and so on. Its characteristics of non-toxic, tasteless and not easy to cause human rejection ensure the safety and reliability of medical devices.
In the automotive industry, silicone rubber is used in the manufacture of engine seals, heat pipes, interior decoration components, etc. As mentioned above, the new silicone rubber with excellent performance is expected to be applied in engine cooling water pipes and other components to improve the performance and reliability of automobiles under high temperature and complex working conditions. With the continuous improvement of material performance requirements in various industries, silicone rubber will play an important role in more fields by virtue of its own advantages and promote the technological upgrading and development of related industries.