Method for Producing Polymer-Encapsulated Nanoparticles
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United States of America Patent
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Issued Date -
Jan 24, 2013
app pub date -
Jul 13, 2012
filing date -
Jul 20, 2011
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Abandoned
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Abstract
The present invention relates to a method for producing polymer-encapsulated nanoparticles comprising the steps of: pumping supercritical fluid into a pressurised vessel, at a predetermined pressure; spraying a solution comprising a compound to be encapsulated, a polymer and an organic solvent into the vessel; collecting precipitated particles on a filter; and washing the particles with the supercritical fluid to remove residual solvent; characterised in that: the difference between the melting point of the polymer and the melting point of the compound to be encapsulated is not more than 10° C.
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