Toner for developing static charge images
AssigneeTomoegawa Paper Co., Ltd.
InventorsNobuyuki Aoki, Hideo Fujita, Jiro Aoshima
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Abstract
Present invention provides a toner for developing static charge images to the surface of which is adhered powder of aluminum oxide in the amount of 0.01% to 5% by weight. This aluminum oxide has a specific surface area of not less than 80 m.sup.2 /g as measured by BET method, and absorptional CO.sub.2 gas pieces of not more than 4.0 pieces/nm.sup.2.
Claims9
A toner for developing static charge images, having an aluminum oxide powder adhered to the surface thereof in the amount of 0.01% to 5% by weight, said aluminum oxide powder being treated by a coupling agent and having a specific surface area of not less than 75 m.sup.2 /g as measured by BET method so as to adsorb CO.sub.2 gas at a rate not more than 4.0 pieces/nm.sup.2, wherein said coupling agent is one or more of the materials selected from the group consisting of dimethylsilicone, methyltrimethoxysilane, (3-aminopropyl)trimethoxysilane, (3-aminopropyl)triethoxysilane, (3-(2-aminoethoxyamino)propyl)triethoxysilane, (3-(2-aminoethoxyamino)propyl)trimethoxysilane and C.sub.8 F.sub.17 SO.sub.2 NC.sub.2 H.sub.5 (CH.sub.2).sub.3 Si(CH.sub.3 O).sub.3.
Dependencies are inferred from the claim text.