Patent ID: 6235274
Filing Date: 2001-05-22
Classification: A23L,A23V,A61K,A61Q,Y10T

Abstract:
A process for preparing solid particles, which (i) controllably release one or more olfactory sense effecting compositions of matter therefrom into the environment surrounding said particles and (ii) provide a burst release of olfactory sense effecting compositions of matter when contacted with water, comprising the steps of:(a) adsorbing at least one olfactory sense effecting composition of matter onto silica powder by means of fluidized bed plating in order to provide an olfactory sense effecting composition-bearing silica powder composition;(b) providing a molten saccharide composition consisting essentially of a mixture of maltose and mannitol;(c) providing an extruder having an extruder input zone and an extruder output zone and having a screw speed of 150-400 rpm;(d) substantially simultaneously introducing (i) said saccharide composition and (ii) said olfactory sense effecting composition of matter-bearing silica composition into the extruder at the extruder input zone;(e) effecting the blending for a residence time of from about 30 up to about 150 seconds at a temperature in the range of from about 80.degree. C. up to about 140.degree. C. of the saccharide composition with the olfactory sense effecting composition of matter-bearing silica powder composition in the extruder on operation of the extruder whereby an olfactory sense effecting composition-bearing silica-saccharide tow is formed in the extruder and exits from the extruder at the extruder output zone;(f) causing the resulting tow to solidify using drum chilling; and(g) converting the resulting solidified drum-chilled tow into particles by means of the unit operation of grinding.