| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing hydrophobic precipitated silica. SOLUTION: a) A mixture of organopolysiloxane derivative and precipitated silica is manufactured; b) the conditioning of the mixture is performed at 10-150 deg.C for 5-72 hours; c) oxidation heating is performed using oxidation gas at a high temperature of >300 deg.C. Thereby the precipitated silica is obtained which is covalent bonded with carbon in a compounded material of a silicone rubber, and having a high load factor, low moisture absorbance, low thickening function, good strengthening performance, and moreover high whiteness.
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