PROCEDE DE PREPARATION DE PARTICULES CREUSES ET LEURS APPLICATIONS

The invention relates to a method for preparing hollow particles, including: 1) spray-depositing, in particular in a fluidized air bed and onto a substrate that is partially soluble in a liquid medium M, a coating containing: 40 to 100 wt % of at least one compound that is insoluble in water having...

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Bibliographic Details
Main Authors CASTAN CATHERINE, CAISSE PHILIPPE
Format Patent
LanguageFrench
Published 29.07.2011
Subjects
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
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Summary:The invention relates to a method for preparing hollow particles, including: 1) spray-depositing, in particular in a fluidized air bed and onto a substrate that is partially soluble in a liquid medium M, a coating containing: 40 to 100 wt % of at least one compound that is insoluble in water having a pH of less than 5 and that comprises at least one polymer; and 60 to 0 % of at least one water-soluble compound; 2) extracting a portion of the substrate in the medium M; and 3) drying the particles obtained in step 2. The invention also relates to the resulting hollow particles and to the uses thereof, in particular in floating pharmaceutical compositions.
Bibliography:Application Number: FR20090053607