Compared with other plastic materials, the aging resistance of silicone rubber products is very prominent, otherwise, silicone rubber will not be used to seal some mechanical equipment. However, in order to achieve the effect of aging resistance and corrosion resistance in contact with mechanical oil, special synthetic silica gel raw materials are required.
For example, the use temperature range of anti-corrosion and high temperature-resistant silicone anti-skid pads is -70℃-350℃. The commonly used product is methyl phenyl vinyl silicone rubber, which is a combination of methyl phenyl silicone links or It is obtained by introducing the diphenyl siloxane link into the molecular chain of methyl vinyl silicone rubber. The introduction of the phenyl group into the side group of the polysiloxane greatly reduces the performance of the polymer due to the destruction of the regularity of the dimethylsiloxane structure.
In addition to methyl vinyl silicone rubber with a small compression set, wide operating temperature range, oxidation resistance, weather resistance, shock resistance, moisture resistance, and good electrical insulation properties, it also has excellent low-temperature resistance, ablation resistance, and radiation resistance. . With the different phenyl content in the molecular chain, these properties will also change. Generally speaking, the phenyl content (the ratio of phenyl to silicon atoms) 5-10% is called low phenyl silicone rubber, which has a special Cold resistance, the elasticity of rubber can still be maintained between -70 ℃ and 100 ℃, and the low-temperature performance is better.
So for commonly used household silicone products, is it also resistant to aging?
Silica gel is originally a synthetic material. It is better than ordinary plastics in various properties. Generally, silica gel product processing factories will choose different synthetic silica gels according to customer-customized products. Consumers do not need to worry about aging and fading during the normal use of silicone daily necessities, but it is best to follow the instructions in the product manual.
