Branched polyesters

Details Branched polyesters Branched polyesters

C - Chemistry, Metallurgy

08

G

C08G 63/20 (2006.01) B01D 21/26 (2006.01) B03D 3/00 (2006.01) G01N 1/28 (2006.01)

Patent

CA 2270157

Polyesters are described which are substantially the condensation products of at least one dicarboxylic acid, at least one volatile diol and at least one hydroxyl-functional component with functionality greater than 2 which controls ultimate viscosity. The products are suitable vehicles for the formulated thixotropic gels for centrifugal separation of fluids such as serum into high and low density components of, for example, separation of mixtures of cells on the basis of density.

Cette invention concerne des polyesters qui consistent essentiellement en des produits de condensation des éléments suivants: au moins un acide dicarboxylique; au moins un diol volatile; et au moins un composant à fonction hydroxyle qui possède une fonctionnalité supérieure à 2 et qui permet d'ajuster la viscosité limite. Ces produits représentent des excipients acceptables pour les gels thixotropiques formulés qui sont utilisés dans la séparation centrifuge de fluides, tel que du sérum, en composants de densité faible ou élevée, ainsi que dans la séparation de mélanges de cellules en fonction de la densité, entre autres.

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