RTV silicone rubber generally uses fumed silica with a relatively low specific surface area as a filler.
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RTV silicone rubber generally uses fumed silica with a relatively low specific surface area as a filler. Unreinforced silicone rubber is brittle after vulcanization. After adding fumed silica for reinforcement, the hardness of silicone rubber increases with the amount of silica added.
When adding fumed silica to RTV silicone rubber, attention must be paid to its degree of dispersion in the polymer. Under the same dispersion conditions, fumed silica products with larger specific surface area generally have better transparency.
To sum up, fumed silica is an essential reinforcing material for silicone rubber. Due to its unique properties, it is also obtained in other fields, such as coatings, inks, medicine, cosmetics, and chemical mechanical polishing (CMP). Wide application, the development prospect is also very bright.
