Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Toru Taki0
Osamu Ogawa0
Takashi Matsuda0
Date of Patent
November 9, 2010
0Patent Application Number
122571150
Date Filed
October 23, 2008
0Patent Primary Examiner
Patent abstract
The present invention provides an environmentally pollution-free, anti-corrosive pigment composition which is free of any heavy metal such as lead and/or chromium, which is free of zinc and/or water-soluble ions and which is excellent in the anti-corrosive effect. The anti-corrosive pigment composition comprises condensed calcium phosphate prepared by firing a mixture which comprises a calcium-containing component and a phosphorus-containing component and in which the molar ratio (Ca/P=m) of calcium to phosphorus present in these components falls within the following range: 0.50<m<1.00, at a temperature ranging from 180 to 350° C.
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