Hydrophobic silica is a specially treated silicon dioxide. It is reacted by hydrophilic silica and silane coupling agent under suitable conditions, to prepare a kind of solid powder silica with polysiloxane grafting surface according to different industry requirements.

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Hydrophobic silica is a specially treated silicon dioxide. It is reacted by hydrophilic silica and silane coupling agent under suitable conditions, to prepare a kind of solid powder silica with polysiloxane grafting surface according to different industry requirements. The hydrophobic contact angle can be 70  to 150, not only has good hydrophobic, and defoaming, thickening, good flowing property, flooding, and other functions, can be used in textile dyeing and finishing, defoaming agent, lubricant, unsaturated polyester resin, powder fire extinguishing agent and silicone rubber products.