Low temperature resistant silica gel is a new generation of green environmental protection and energy saving silica gel material, its low temperature molding can be quickly vulcanized, 120°C vulcanized molding. No need to add vulcanizing agent, no need for secondary vulcanization. Conventional silicone material vulcanization temperature 180°C, long molding time, need to add double 24 or double 25 catalyst, and the product needs two-stage vulcanization.

Low-temperature silicone rubber refers to the silicone rubber with a working temperature of -100 ° C, and its mechanism is different from conventional silicone rubber, which is obtained by introducing methyl phenyl silicone link or diphenyl silicone link into the molecular chain of methyl vinyl silicone rubber. Compression permanent deformation is small, the use of a wide temperature range, the following Hongtu silica gel details to introduce you to the low temperature silicone.

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

Small compression permanent deformation, wide temperature range, oxidation resistance, weather resistance, shock resistance, moisture resistance and good electrical insulation properties, low temperature resistance, ablative resistance and radiation resistance.

Low temperature silicone material is divided into the following categories:
1. The phenyl content (ratio of phenyl to silicon atoms) is called low phenyl silicone rubber at 5~10%.
2. The phenyl content of 20~40% is called medium phenyl silicone rubber, which has fire resistance characteristics and can self-extinguish once on fire.
3. When the phenyl content is 40~50%, it is high phenyl silicone rubber, which has radiation resistance. The ray is 1xI08 Roentgen.

Generally speaking, with the increase of phenyl content, the rigidity of silicone rubber molecular chain gradually increases, and the low temperature resistance of silicone rubber gradually decreases, but with the increase of phenyl content, the fire resistance and radiation resistance of vulcanized rubber are improved.

Low-temperature 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 to make a variety of molded and extruded products, used as cold-resistant rubber in the aviation industry, or used for ablative, heat-aging, and radiation-resistant parts of the seal.