Novel poly(methylidene malonate) microspheres, preparation...

A - Human Necessities – 61 – K

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A61K 9/16 (2006.01) C08J 3/14 (2006.01)

Patent

CA 2330481

The invention concerns novel microspheres particularly useful in pharmaceutics as particulate vectors for carrying biologically active substances, in particular hydrophilic substances, for oral administration. The invention is characterised in that said microspheres consist of a support material continuous lattice wherein is optionally dispersed a substance, said support material containing at least 70 wt.% of a homopolymer consisting of recurrent units corresponding to general formula (I) wherein: R1 represents an alkyl group containing 1 to 6 carbon atoms or a (CH2)m - COOR3 group wherein m is an integer ranging between 1 and 5 and R3 represents an alkyl group having 1 to 6 carbon atoms; R2 represents an alkyl group having 1 to 6 carbon atoms; and n is an integer ranging between 1 and 5. The invention is useful in pharmaceutics.

La présente invention a pour objet de nouvelles microsphères notamment utiles dans le domaine pharmaceutique comme vecteurs particulaires destinés au transport de substances biologiquement actives, en particulier de substances hydrophiles, en vue d'une administration orale. Selon l'invention, ces microsphères sont constituées d'un réseau continu d'un matériau support dans lequel est éventuellement dispersée une substance, ledit matériau support contenant au moins 70 % en poids d'un homopolymère constitué d'unités récurrentes répondant à la formule générale (I), dans laquelle; R¿1? représente un groupe alkyle ayant de 1 à 6 atomes de carbone ou un groupe (CH¿2?)¿m? - COOR¿3? dans lequel m est un nombre entier compris entre 1 et 5 et R¿3? représente un groupe alkyle ayant de 1 à 6 atomes de carbone; R¿2? représente un groupe alkyle ayant de 1 à 6 atomes de carbone; et n est un nombre entier compris entre 1 et 5. Application: domaine pharmaceutique.

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