C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/09 (2006.01) C08J 3/12 (2006.01)
Patent
CA 2706214
The invention relates to a method for producing spherical particles from at least one material, said method comprising the following steps: (A) a solution or a dispersion of the at least one material is produced in at least one solvent or dispersant that can be mixed with water, (B) the solution or dispersion obtained in step (A) is transformed into individual portions containing a quantity of the at least one material corresponding to the quantity present in the spherical particles, by means of underwater granulation, and (C) the portions obtained in step (B) are introduced into a medium that can be mixed with the solvent or dispersant from step (A) and in which the material used in step A is insoluble, such that the solvent or dispersant used in step (A) is replaced by the medium that can be mixed with the solvent or dispersant from step (A), and the material is hardened to form the spherical particles.
La présente invention concerne un procédé de production de particules sphériques constituées d'au moins un matériau, lequel procédé consiste à (A) produire une solution ou dispersion dudit au moins un matériau dans au moins un solvant ou dispersant miscible à l'eau, (B) transformer la solution ou dispersion obtenue à l'issue de l'étape (A) en portions individuelles contenant une quantité dudit au moins un matériau correspondant à la quantité présente dans les particules sphériques par granulation sous l'eau et (C) incorporer les portions obtenues à l'issue de l'étape (B) dans un milieu miscible avec le solvant ou dispersant de l'étape (A), milieu dans lequel le matériau utilisé à l'étape (A) n'est pas soluble, de sorte que le solvant ou dispersant utilisé à l'étape (A) est remplacé par le milieu miscible avec le solvant ou dispersant de l'étape (A) et le matériau de la particule sphérique se met à durcir.
Barrera-Medrano Daniel
Farwerck Karl-Peter
Guentherberg Norbert
Kurps Armin
Lutz Michael
Basf Se
Robic
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