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    • 3. 发明授权
    • Treated silica fine powder and toner for developing electrostatic images
    • 处理二氧化硅细粉和用于显影静电图像的调色剂
    • US5306588A
    • 1994-04-26
    • US854001
    • 1992-03-19
    • Katsuhiko TanakaTsuyoshi TakigushiRika Doi
    • Katsuhiko TanakaTsuyoshi TakigushiRika Doi
    • G03G9/097G03G9/08
    • G03G9/09716Y10T428/2993
    • A treated silica fine powder and a toner having this powder to be used as a toner for developing an electrostatic image. The treated silica fine powder is formed of treated fine silica particles obtained by treating fine silica particles with (a) a first silane coupling agent in which at least one of a substituted secondary alkyl group, an unsubstituted secondary alkyl group, a substituted tertiary alkyl group, an unsubstituted tertiary alkyl group, a substituted cyclic hydrocarbon group and an unsubstituted cyclic hydrocarbon group is bonded to a silicon atom of the silane coupling agent, and by thereafter treating the resultant fine particles of silica with a second silane coupling agent having the formula ##STR1## wherein R1 represents a methyl group, a halomethyl group, a saturated straight chain hydrocarbon group or an unsaturated straight chain hydrocarbon group; Y represents an alkoxy group or a halogen group; m represents an integer of 1 to 3; n represents an integer of 1 to 3; and m and n are 4.
    • 处理过的二氧化硅细粉末和具有该粉末的调色剂用作显影静电图像的调色剂。 经处理的二氧化硅细粉末由(a)第一硅烷偶联剂处理二氧化硅微粒得到的经处理的二氧化硅微粒形成,其中取代的仲烷基,未取代的仲烷基,取代的叔烷基中的至少一个 ,未取代的叔烷基,取代的环状烃基和未取代的环状烃基键合到硅烷偶联剂的硅原子上,然后用具有式(II)的第二硅烷偶联剂处理得到的二氧化硅微粒, *化学结构*)其中R1表示甲基,卤代甲基,饱和直链烃基或不饱和直链烃基; Y表示烷氧基或卤素基; m表示1〜3的整数, n表示1〜3的整数, m和n为4。