Inorganic shaped bodies and methods for their production and...

A - Human Necessities – 61 – L

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Details

A61L 27/12 (2006.01) A61F 2/00 (2006.01) A61F 2/28 (2006.01) A61K 9/14 (2006.01) A61L 27/56 (2006.01)

Patent

CA 2500722

Shaped, preferably porous, inorganic bodies are provided which are prepared from a reactive blend. In accordance with one preferred embodiment, the solution is absorbed into a porous sacrificial substrate such as a cellulose sponge. The solution-saturated substrate is heated and an oxidation-reduction reaction occurs thereby forming an inorganic solid. A shaped, inorganic body is formed in situ. Optional, but preferred additional thermal treatment of the shaped, inorganic body removes the organic substrate, leaving an inorganic body that faithfully mimics the porosity, shape, and other physical characteristics of the organic substrate. Inorganic substrates may also be used to good effect. Large varieties of shaped bodies can be prepared in accordance with other embodiments of the invention and such shapes find wide use in surgery, laboratory and industrial processes and otherwise. The invention also provides chemically and morphologically uniform powders, including those having uniformly small sizes.

L'invention concerne des éléments profilés inorganiques, de préférence poreux, réalisés à partir d'un mélange réactif. Dans un mode de réalisation préféré, la solution est absorbée par un substrat sacrificiel poreux tel qu'une éponge de cellulose. Saturé par la solution, le substrat est chauffé et une réaction d'oxydoréduction se produit, formant ainsi un solide inorganique. Un élément inorganique profilé est donc élaboré in situ. Un traitement thermique éventuel, et de préférence additionnel, de l'élément inorganique profilé permet d'extraire le substrat organique, laissant un élément inorganique qui reproduit fidèlement le substrat organique en termes de porosité, de forme et d'autres caractéristiques physiques. Les substrats inorganiques sont également utilisés pour leur efficacité. Une grande diversité d'éléments profilés peut être réalisée selon d'autres modes de réalisation de la présente invention, ces profilés étant largement utilisés en chirurgie, dans les applications de laboratoire, les processus industriels et autres. La présente invention porte également sur des poudres chimiquement et morphologiquement homogènes, y compris les poudres de granulométrie uniformément petite.

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