申请人:Toray Silicone Company, Ltd.
公开号:EP0251176A2
公开(公告)日:1988-01-07
In the present invention, finely divided silica is treated with two types of organosilicon compounds,
(i) organosilicon compound having the general formula
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, -NR¹₂, -ONR¹₂, or -OCOR¹;
when a equals 2, Z is -O- or -NR¹-; and R¹ 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.
在本发明中,用两种有机硅化合物处理细分二氧化硅、
(i) 通式如下的有机硅化合物
其中 R 是单价烃基;n 是数值为 0 至 10 的整数;Q 是烷氧基、卤素原子或羟基,以及
(ii) 通式为
(R₃Si)a-Z
其中 R 为一价烃基;a 为 1 或 2;当 a 等于 1 时,Z 为氢原子、卤素原子、羟基、烷氧基、-NR¹₂、-ONR¹₂ 或 -OCOR¹;
当 a 等于 2 时,Z 为-O-或-NR¹-;R¹ 为氢原子或烷基。
本发明所提供的细分二氧化硅表面处理程度高,与有机聚硅氧烷混合后触变性增强,并在长期储存中保持稳定。