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OwnerHassan Benameur, Philippe Barthelemyinventors
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The invention concerns a method for coating solid particles with a thermofusible agent which consists in: fluidizing the solid particles in an ascending air movement in spiral rotation to obtain a homogeneous individualised distribution of the particles in the air fluidized bed, the temperature of the air fluidized bed being lower than the melting point of the thermofusible agent; spraying on the particles the melted thermofusible agent in the form of atomised droplets, said droplets being distributed in a spraying cone included in an air zone, whereof the temperature enables to maintain, throughout said spraying process, a temperature of the thermofusible agent substantially equal its melting point, the spraying being carried out in the same direction and tangentially to the movement followed by the solid particles; finally, after the coating process, cooling the resulting coated particles so as to solidify the thermofusible agent around the particles.
The process for coating solid particles with at least one hot-melt agent, according to which:
A solid particle coated with a coating agent comprising at least one partial ester of alcohol with at least one fatty acid, characterized in that the particle size before coating is less than 400 micrometers, advantageously less than 200 micrometers, and in that the coating represents between 1 and 25% by weight of the coated particle.
An ibuprofen particle coated with a coating agent, characterized in that the uncoated particle size is less than 200 micrometers, and in that the coating agent comprises at least one partial ester of alcohol with at least one fatty acid and represents between 1 and 25% by weight of the coated particle, advantageously between 2 and 8%.
Dependencies are inferred from the claim text.