Stable aqueous colloidal dispersion, method for preparing same
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United States of America Patent
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Issued Date -
Aug 5, 2004
app pub date -
Oct 27, 2003
filing date -
Apr 27, 2001
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Abandoned
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Abstract
The invention concerns a stable aqueous colloidal dispersion of colloids with apatite structure, having a pH ranging between 5 and 10.5, comprising a bifunctionalised stabilising agent having a first amine or ammonium function and a second function capable of complexing calcium, and consisting of oblong colloids with an average number length ranging between 5 and 100 nm and an equivalent aspect ratio (number average length/equivalent diameter ratio) ranging between 2 and 300, said colloids with apatite structure corresponding to the formula: Ca.sub.10-x(HPO.sub.4).sub.x(PO.sub.4).sub.6-x(J).sub.2-x, wherein x and J are such as defined in claim 1.
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