| 摘要 |
In the present invention, finely divided silica is treated with two types of organosilicon compounds, (i) organosilicon compound having the general formula <CHEM> wherein R is a monovalent hydrocarbon group; n is an integer having a value of 0 to 10; and Q is an alkoxy group, halogen atom, or hydroxyl group, and (ii) organosilicon compound having the general formula (R3Si)a-Z wherein R is a monovalent hydrocarbon group; a is 1 or 2; when a equals 1, Z is a hydrogen atom, halogen atom. hydroxyl group, alkoxy group, -NR<1>2, -ONR<1>2, or -OCOR<1>; when a equals 2, Z is -O- or -NR<1>-; and R<1> is the hydrogen atom or an alkyl group. The present invention characteristically affords a finely divided silica which has a high degree of surface treatment, which provides an elevated thixotropy when mixed with organopolysiloxane, and which provides stability in long-term storage. |
