| Name | Silica, Hydrophobic |
| Synonyms | Silica, Hydrophobic |
| Physical and Chemical Properties | Chemical properties White amorphous fine powder, hydrophobic. Insoluble in water and acid. Soluble in caustic potassium (sodium) and hydrofluoric acid. It does not decompose at high temperatures. It has high electrical insulation. Non-toxic, odorless, non-oxidizing, non-corrosive, non-burning. |
| Use | Uses can be used as a reinforcing agent for white rubber products, plastic filler, ink thickener and anti-caking agent for dry powder fire extinguishing agent. |
dimethyldichlorosilane method will dilute and purify water glass by ion exchange to remove sodium ions, then add hydrochloric acid for acid hot reflux concentration, add dimethyldichlorosilane monomer solvent for hydrophobic treatment, remove solvent, dry to obtain hydrophobic silica.