Process for producing s(+)-ibuprofen particles

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 57/30 (2006.01) A61K 9/14 (2006.01) A61K 9/16 (2006.01) A61K 9/22 (2006.01) A61K 31/19 (2006.01) C07C 51/43 (2006.01)

Patent

CA 2181810

A process for the production of S(+)-ibuprofen-particles having improved flow properties comprises the steps that coarse-crystalline S(+)-ibuprofen is molten and then in a molten condition is finely distributed in a non-solving medium, preferably in cold water, and is chilled therein. This chilling results in a fine- crystalline primary structure that agglomerates to a secondary structure. In this agglomerate form the product is obtained which is filtered out and is dried. Such particles are suitable for direct pressing of tablets, optionally, tableting auxiliary substances being added, also for the production of tablets having a retarded release of the active substance.

L'invention concerne un procédé de production de particules d'ibuprofène S(+) présentant une meilleure aptitude à l'écoulement. De l'ibuprofène S(+) en gros cristaux est fondu, puis est réparti finement et refroidi brusquement à l'état fondu, dans un non-solvant, de préférence dans de l'eau froide. Ce refroidissement brusque crée une structure primaire à fins cristaux qui est agglomérée pour former une structure secondaire. Le produit ainsi obtenu sous cette forme d'agglomérats est filtré et séché. Ce type de particules s'utilisent pour être compactées directement en comprimés, avec l'adjonction éventuelle d'additifs de production de comprimés, ainsi que pour la production de comprimés à libération retard du principe actif.

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