发明名称 |
Hydrophobic silica fine powder and its manufacture |
摘要 |
A hydrophobic silica fine powder is prepared by premixing a hydrophilic silica fine powder with a dimer diol siloxane or cyclic siloxane as a hydrophobizing agent, mixing them in a ball mill for achieving dispersion and for achieving cleavage or disintegration and consolidation, and thereafter heating at 100-300 DEG C in an ammonia or amine-containing atmosphere. The powder has an aerated bulk density of 100-300 g/l, a specific surface area of 40-300 m<2>/g, a primary particle diameter of 10-120 nm, and a degree of hydrophobization of 40-80 as measured by methanol titration and is less bulky, easy to handle and disperse and stable in a kneaded mixture.
|
申请公布号 |
EP1316589(A2) |
申请公布日期 |
2003.06.04 |
申请号 |
EP20020258304 |
申请日期 |
2002.12.02 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
KONYA, Y.;WATANABE, K.;UENO, S. |
分类号 |
C01B33/18;C08K3/36;C09C1/28;C09C1/30;C09C3/12;(IPC1-7):C09C1/30;C01B33/159 |
主分类号 |
C01B33/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|