modified silicon oxide powder

Abstract

Abstract PURPOSE:The titled powder, prepared by coating the surface of silica powder with a siloxane polymer layer obtained by reaction thereof with a silanol oligomer containing fluoroalkyl chains to modify the surface thereof, and having improved affinity for fluororesins and further improved reinforcing effect as a filler. CONSTITUTION:Modified silicon oxide powder prepared by coating the surface of silica powder with a siloxane polymer layer obtained by reaction thereof with a silanol oligomer containing fluoroalkyl groups e.g. a compound of formula [Rf is a silane residue containing fluoroalkyl groups, preferably halogenosilane or alkoxysilane; m and n are as follows; 5<=(m+n)<=20] to modify the surface of the silica powder. Preferably, the modification ratio of the above-mentioned silanol oligomer containing the fluoroalkyl groups (ratio between the number of -OH groups substituted by -Rf groups and the number of -OH groups in the total oligomer) is (1/40)-(1/10). EFFECT:The resultant powder is effective as an extender without causing phase separation even in filling in a large amount.

Inventors

• 👤 Fumio Nakano
• 👤 文雄 中野
• 👤 Kishiro Iwasaki
• 👤 岩崎　紀四郎

Bibliographic Details