Surface-modified metal oxide powder and process for producing same

A technology of oxide powder and surface modification, applied in various semi-fields, it can solve the problems of easy charging, easy adhesion of dust, etc., and achieve the effect of improving blurring, eliminating powder coloring or decomposition, and having excellent stability over time.

Active Publication Date: 2012-04-11
NIPPON AEROSIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] On the other hand, synthetic resins have been used in various fields such as electrical equipment such as televisions, automotive parts, precision equipment such as optical lenses, optical discs, organic glass, and display panels. However, compared with glass products, synthetic resins are lightweight and Excellent strength and toughness, but on the other hand, it has disadvantages such as easy electrification and easy adhesion of dust

Method used

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  • Surface-modified metal oxide powder and process for producing same
  • Surface-modified metal oxide powder and process for producing same
  • Surface-modified metal oxide powder and process for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] First, an ionic liquid diluted by adding 15 g of ethanol as an organic solvent to 5 g of an aliphatic amine-based ionic liquid (manufactured by Koei Chemical Co., Ltd.: IL-A2) was prepared. Secondly, the specific surface area of ​​100g BET is 200m 2 Silica powder obtained by gas-phase method (trade name: Aerosil 200 manufactured by Aerosil Corporation of Japan) per g was charged into a reaction vessel, and in the reaction vessel, the above-mentioned diluted ionic liquids. Next, this was mixed under a nitrogen atmosphere at a temperature of 200° C. for 60 minutes while stirring, and then cooled with cooling water to obtain a metal oxide powder. This surface-treated metal oxide powder was used as Example 1. It should be noted that the above-mentioned ionic liquid used is an ionic liquid containing a fluorinated alkylsulfonyl group as an anion.

Embodiment 2

[0082] Except having further added 20 g of dimethyl silicone oil as a surface modifying agent to the diluted ionic liquid, surface treatment was performed similarly to Example 1, and the metal oxide powder was obtained. This surface-modified metal oxide powder was referred to as Example 2.

Embodiment 3

[0084] Except having further added 20 g of hexamethyldisilazane as a surface modifier to the diluted ionic liquid, surface treatment was performed in the same manner as in Example 1 to obtain a metal oxide powder. This surface-modified metal oxide powder was referred to as Example 3.

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Abstract

The inventioni provides a surface-modified metal oxide powder obtained by subjecting a metal oxide powder to a surface treatment, characterized in that the ratio of the initial frictional charge (A) measured at 1 minute after the powder is dispersed in a ferrite carrier to the later frictional charge (B) measured at 30 minutes thereafter, A/B, is 1.0-2.0 and that the later frictional charge (B) is -300 to +300 [mu]C/g. The surface-modified metal oxide powder is less electrifiable and has better stability over time of frictional charge than conventional ones. Consequently, the powder, when used as an external additive, stabilizes various properties including flowability and electrification characteristics without considerably reducing the properties of a developer or the like. Thus, problems such as blurring and a decrease in image quality can be minimized.

Description

technical field [0001] The present invention relates to a surface-modified metal oxide powder and a manufacturing method thereof. The surface-modified metal oxide powder aims at improving the fluidity of the powder, preventing agglomeration or adjusting frictional electrification, etc., and is suitable as a External additives added to paints or electrophotographic toners, etc., or used to impart conductivity to various semi-conductive parts such as synthetic resin parts, rubber parts, antistatic films, coating materials, etc., and to impart antistatic effects imparting agent. More specifically, the present invention relates to a surface-modified metal oxide powder having weak chargeability and excellent temporal stability of triboelectric charge, and capable of imparting sufficient and stable electrical conductivity to the resin when added to the resin or the like, and its production method. Background technique [0002] For a long time, in the field of electronic photogra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14C01B33/18G03G9/08
CPCC01P2006/12C09C1/3072C01B13/18G03G9/09716C09C1/3081G03G9/09725C01P2006/40C09C1/3063C01B33/18C01B13/185C01P2006/80
Inventor 田代英昭井上晃
Owner NIPPON AEROSIL
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