Novel hydrogels based on polyvinyl alcohols and polyvinyl...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 18/08 (2006.01) C08F 16/06 (2006.01)

Patent

CA 2566818

The invention relates to hydrogels containing polyvinyl alcohols and/or polyvinyl alcohol copolymers having special geometries, methods for the production of said hydrogels, and the use of the hydrogels as materials in the biomedical and pharmaceutical field, for producing contact lenses, for the controlled release of active substances, as a carrier material for inclusion- immobilized biocatalysts, a carrier material for transition metal catalysts, a material for producing reactive membranes, an additive to drilling fluid, a displacing agent in oil recovery, a cement additive and an additive to highly viscous liquids such as crude oil to improve the flowability and increase the speed of conveyance, and a component of cosmetic products.

L'invention concerne des hydrogels qui contiennent des alcools polyvinyliques et/ou des copolymères d'alcools polyvinyliques à géométries particulières. L'invention concerne également des procédés pour produire ces hydrogels et l'utilisation de ces hydrogels comme substances dans le domaine biomédical et pharmaceutique, pour la production de lentilles de contact, pour la libération contrôlée de principes actifs, en tant que support pour des biocatalyseurs immobilisés par inclusion, en tant que support pour des catalyseurs à base de métaux de transition, comme substance pour la production de membranes réactives, comme adjuvant à des liquides de forage, comme agent de déplacement pour l'exploitation pétrolière, comme additif pour le ciment et comme adjuvant à des liquides très visqueux, comme le pétrole, pour améliorer l'aptitude à l'écoulement et pour accélérer le transport, ainsi que comme constituant de produits cosmétiques.

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