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Surface treated metallic oxide fine powder and preparation and use thereof

A surface treatment and oxide technology, applied in the field of surface-treated metal oxide fine powder and surface-treated silica fine powder

Inactive Publication Date: 2008-06-18
DEGUSSA AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, there is a problem that the electric charge changes greatly as the stirring time becomes longer

Method used

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  • Surface treated metallic oxide fine powder and preparation and use thereof
  • Surface treated metallic oxide fine powder and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The BET specific surface area to be synthesized by the vapor phase method is 200m 2 / g of silica powder (NIHON AEROSIL product; Aerosil 200) was added to the reaction vessel and while stirring in a nitrogen atmosphere, 5 g of γ-aminopropyltriethoxysilane (Shin-Etsu Chemical Co., Ltd. product : KBE 903), N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (Shin-Etsu Chemical Co., Ltd product: KBM603) and 15 g of dimethyl-silicone oil (Shin-Etsu Chemical Co., Ltd. product: a mixed solution of KF 96) was sprayed onto 100 g of the silica powder. The sprayed powder was heated with stirring at 200° C. for 60 minutes, and then cooled to prepare a surface-treated silica fine powder A.

Embodiment 2-7

[0066] Each mixed solution is synthesized by the vapor phase method and has the silica powder with the specific surface area shown in Table 1, the primary amino-containing silane coupling agent shown in Formula 3, and the amino-containing silane coupling agent shown in Formula 4. agent and hydrophobic agent composition, the mixed solution was used to prepare surface-treated silica fine powders B-G by the same method as in Example 1 under the heating conditions shown in Table 1.

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Abstract

A hybrid solution comprised of given silane resin acceptor having amino, other silane resin acceptor having amino and hydrophobing agent is used to process metal oxide powder like the surface of silicon dioxide powder, in order to steady friction static charge. The charge of the powder like silicon dioxide has small change along with time and is suitable to use as powder dope or an additive of electronic photography toner.

Description

technical field [0001] The present invention relates to a surface-treated metal oxide fine powder, which has good fluidity and excellent stability with respect to stirring time, and particularly relates to a surface-treated silicon dioxide fine powder. More specifically, the present invention relates to a surface-treated metal oxide fine powder having improved stability with respect to stirring time, a method for producing the same, and an electrophotographic toner using the fine powder, with respect to surface-treated silica Fine powder, etc., which are added to powder coatings, electrophotographic toners, etc., in order to improve fluidity, prevent aggregation, or adjust charge, etc. Background technique [0002] Surface-treated metal oxide fine powders, in which the surface of metal oxide fine powders (such as silica, titania, and alumina) are treated with organic materials, which are widely used as fluidity improvers for electrophotographic toners , used in copiers, las...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/12
Inventor 保罗·布兰德尔
Owner DEGUSSA AG
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