Polymeric microbeads and method of preparation

Details Polymeric microbeads and method of preparation Polymeric microbeads and method of preparation

B - Operations, Transporting

01

J

B01J 13/18 (2006.01) B01D 15/04 (2006.01) B01D 15/08 (2006.01) B01J 13/02 (2006.01) B01J 13/20 (2006.01) B01J 20/26 (2006.01) B01J 20/28 (2006.01) B01J 20/32 (2006.01) B01J 39/26 (2006.01) B01J 41/20 (2006.01) C07K 1/04 (2006.01) C08F 8/00 (2006.01) C08J 9/00 (2006.01) C12N 5/00 (2006.01)

Patent

CA 2190731

The present invention relates to porous crosslinked polymeric microbeads having cavities joined by pores wherein at least some of the cavities at the interior of each microbead communicate with the surface of the microbead. The present invention also relates to a process for producing a porous, crosslinked polymeric microbead as well as the product of this process. This process involves combining an oil phase with an aqueous discontinuous phase to form an emulsion adding the emulsion to an aqueous suspension medium to form an oil-in-water suspension of dispersed emulsion droplets, and polymerizing the emulsion droplets to form microbeads. At least 10 % of the microbeads produced in accordance with the present invention are substantially spherical or substantially ellipsoidal or a combination of the two.

L'invention concerne des microperles polymères poreuses et réticulées, qui possèdent des cavités réunies par des pores de liaison, où au moins quelques-unes des cavités à l'intérieur de chaque microperle communiquent avec la surface de la microperle. Elle concerne également un procédé de préparation d'une microperle polymère poreuse et réticulée, ainsi que le produit obtenu au moyen dudit procédé. Celui-ci consiste à combiner une phase huileuse avec une phase aqueuse discontinue, afin de constituer une émulsion, à ajouter l'émulsion à un milieu en suspension aqueuse, afin d'obtenir une suspension huile-dans-eau constituée par des gouttelettes d'émulsion dispersées et à polymériser les gouttelettes d'émulsion, afin d'obtenir des microperles. Au moins 10 % des microperles produites au moyen dudit procédé sont sensiblement sphériques ou sensiblement ellipsoïdales ou présentent une forme sphérique et ellipsoïdale combinée.

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