C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/20 (2006.01) C08J 3/075 (2006.01) C08L 5/04 (2006.01) C08L 101/12 (2006.01) C09K 8/508 (2006.01) C09K 8/90 (2006.01) C09K 8/92 (2006.01) A61K 9/16 (2006.01)
Patent
CA 2710988
The invention is related to polymer pellets and the methods of their application for controlled release of active substances into the application environment, for example, substances for the initiation, acceleration or inhibition of physico- chemical processes like gellation, cementation etc. As per the invention, the polymer pellet is a gel matrix of an anionic polymer cross-linked with multivalent metals' cations in which at least one active substance and ferromagnetic particles are dispersed with the concentration of ferromagnetic micro-particles from 0.5 to 5%. As per this invention, the polymer pellets may be used for the controlled release of the active substance into the application medium, for obtaining polymer gels and for the generation of locking gel plugs.
L'invention concerne des granules magnétiques polymères ainsi que des processus de libération contrôlée de substances actives dans le milieu d'application, par exemple, pour l'initiation, l'accélération ou le ralentissement de processus physico-chimiques tels que la gélification, la cimentation, etc. Le granule polymère de l'invention comprend une matrice de gel en polymère anionique réticulé par les cations de métaux polyvalents et dans laquelle sont dispersées au moins une substance active et des particules ferromagnétiques, avec une concentration de particules de 0,5 à 5 %. Les granules polymères de l'invention peuvent s'utiliser pour la libération contrôlée d'une substance active dans le milieu d'utilisation, pour obtenir des gels et pour former des bouchons de gel bloquants.
Barabanova Anna Ivanovna
Filippova Olga Evgenevna
Grinberg Natalia Vasilievna
Grinberg Valery Yakovlevich
Khokhlov Alexey Removich
Physics Department M.v. Lomonosov Moscow State University
Smart & Biggar
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