Black iron-based particles, and black paint and rubber or resin composition using the same
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United States of America Patent
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Mar 30, 2010
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app pub date -
May 15, 2006
filing date -
May 23, 2005
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Abstract
There are provided black iron-based particles comprising iron/titanium composite oxide particles having a titanium element content (A) of 5 to 35% by atom based on an iron element content contained in the black iron-based particles, and a ratio of a titanium element content (B) (based on an iron element content contained in the portion dissolved) in a portion of the black iron-based particles, which is dissolved therefrom at an iron element dissolution percentage of 1% by weight, to the titanium content (A) of not less than 1.0. The black iron-based particles of the present invention are not only excellent in dispersibility, acid resistance, tinting strength and blackness, but also exhibit a less magnetization value. Also, the black paint and the rubber or resin composition of the present invention are excellent in acid resistance and blackness.
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