Low temperature resistant silicone rubber is a new generation of green, environmentally friendly, and energy-saving silicone material. Its low-temperature molding can quickly vulcanize, and it can be vulcanized at 120 ° C. No need to add vulcanizing agent, no need for secondary vulcanization. The conventional silicone material has a vulcanization temperature of 180 ° C and a long molding time, requiring the addition of double 24 or double 25 as catalysts, and the product requires a two-stage vulcanization.

Low temperature resistant silicone rubber refers to silicone rubber with a working temperature of -100 ℃. Its structure is different from conventional silicone rubber, and it is obtained by introducing methylphenyl or diphenyl silicone links into the molecular chains of methylvinyl silicone rubber. Low compression permanent deformation and wide temperature range for use.

Low temperature resistant silicone rubber introduces phenyl groups on the side groups of polysiloxane. Due to the disruption of the regularity of the dimethylsiloxane structure, the crystallization temperature of the polymer is greatly reduced, and the working temperature of the resulting silicone extends to -100 ℃.

In addition to low permanent deformation, wide temperature range, oxidation resistance, weather resistance, shock resistance, moisture resistance, and good electrical insulation performance, it also has properties such as low temperature resistance, ablation resistance, and radiation resistance.

Low temperature resistant silicone materials are divided into the following categories:
When the phenyl content (ratio of phenyl to silicon atoms) is between 5-10%, it is called low phenyl silicone rubber.
When the phenyl content is 20-40%, it is called medium phenyl silicone rubber. It has flame resistance and can self extinguish once ignited.

When the phenyl content is between 40-50%, it is called high phenyl silicone rubber, which has radiation resistance. The radiation is 1xI08 Roentgen. Generally speaking, with the increase of phenyl content, the rigidity of the molecular chains 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 vulcanized rubber are improved

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

About Phenyl silicone rubber,please check :Phenyl Silicone Gum（RTV）IOTA 35