Low-temperature resistant silica gel is a new generation of green, environment-friendly and energy-saving silicone rubber material, which can be quickly vulcanized at low temperature and can be vulcanized at 120 ° C. There is no need to add curing agent and secondary curing. The curing temperature of conventional silicone rubber material is 180 ° C, and the molding time is long, so it is necessary to add double twenty-four or double twenty-five as catalyst, and the product needs to be vulcanized in two stages.

Low-temperature silicone rubber refers to silicone rubber with working temperature of - 100 ℃. Its mechanism is different from that of conventional silicone rubber. It is obtained by introducing methylphenylsiloxane or diphenylsiloxane into the molecular chain of methylvinyl silicone rubber. The compression permanent deformation is small and the use temperature range is wide. Here is a detailed introduction of low-temperature resistant silicone rubber.

Low-temperature resistant silicone rubber introduces phenyl on the side group of polysiloxane, which greatly reduces the crystallization temperature of the polymer due to the destruction of the regularity of the structure of dimethylsiloxane, and the working temperature of the resultant silicone extends to - 100 ℃.

In addition to small compression permanent deformation, wide use temperature range, oxidation resistance, weather resistance, shock resistance, moisture resistance and good electrical insulation performance, low temperature resistance, ablation resistance and radiation resistance.
Low-temperature resistant silica gel materials are divided into the following categories:
1. When the content of phenyl (the ratio of phenyl to silicon atom) is 5~10%, it is called low phenyl silicone rubber.
2. When the content of phenyl is 20~40%, it is called medium phenyl silicone rubber. It has flame resistance characteristics and can be self-extinguished once it is ignited.
3. When the phenyl content is 40~50%, it is called high phenyl silicone rubber. It has radiation resistance. The ray is 1xI08 Roentgen.

Generally speaking, with the increase of phenyl content, the rigidity of the molecular chain of silicone rubber gradually increases, and the low-temperature resistance of silicone rubber gradually decreases. However, with the increase of phenyl content, the flame resistance and radiation resistance of vulcanizates are improved.

Low-temperature resistant silicone material is one of the important materials used in aerospace industry, cutting-edge technology and other sectors of the national economy. It can be used for making various molded and extruded products, as cold-resistant rubber in the aviation industry, or as a seal for parts that are resistant to ablation, heat aging and radiation.

For silicone rubber, please check the details:
https://www.siliconerubbers.net/product-methyl-phenyl-vinyl-silicone-gum-my-120.html