Fine particles of petaloid porous hydroxyapatite and process for producing the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Mar 7, 2000
Grant Date -
N/A
app pub date -
Jan 5, 1998
filing date -
Jul 7, 1995
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Expired
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Abstract
The fine particles of peraloid porous hydroxyapatite are provided, which have an atomic ratio of Ca/P in a range of 1.62-1.72 and the chemical formula Ca.sub.5 (PO.sub.4).sub.3 (OH). The particles are comprised of micropores having a petaloid porous structure not only on the surface but also in the inside of the particles, and have the specific particle diameter of the specific particle size, micropore diameter of the specific particle size, the specific surface of the specific range, static and pressurized percentage of voids of the specific range. The particles have superior dispersibility and are useful in the fields such as carriers for pharmaceuticals and so on, adsorbents, absorbents, sustained-release materials, filtering agents, biological materials, fillers for plastics, and anti-blocking agents for films and so on.
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