Biodegradable polyester urethanes, method for the production...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/42 (2006.01) C08G 63/06 (2006.01) C08G 63/78 (2006.01) C08G 63/85 (2006.01) C08G 63/91 (2006.01) C09J 175/06 (2006.01)

Patent

CA 2292564

The invention relates to biodegradable linear polyester urethanes and to biodegradable cross-linked polyester urethanes obtained from linear polyester urethanes by virtue of the fact that they are cross-linked by diisocyanate bridges. By varying the degree of crosslinking, the physical, chemical and biological properties of the inventive cross-linked polyester urethane can be adjusted and the biodegradability thereof can also be varied considering that biological degradability occurs more slowly as the degree of crosslinking increases. The invention also relates to a method for producing the inventive polyester urethanes and to the use thereof as films, rubber bodies, containers, packaging materials and in galenical preparations, as adhesives, adhesive strips and the like. The invention also relates to polymer blends containing the inventive polyurethanes.

L'invention concerne des polyesteruréthanes linéaires biodégradables ainsi que des polyesteruréthanes réticulés biodégradables qui résultent des polyesteruréthanes linéaires par le fait qu'ils sont réticulés par des ponts diisocyanate. La variation du degré de réticulation permet d'ajuster de manière appropriée les caractéristiques physiques, chimiques et biologiques du polyesteruréthane réticulé décrit, et permet notamment de faire varier sa vitesse de biodégradabilité puisque la dégradation biologique s'effectue plus lentement lorsque le degré de réticulation augmente. L'invention a également pour objet un procédé pour la préparation des polyesteruréthanes précités, ainsi que leur utilisation comme films, corps moulés en caoutchouc, récipients, matériaux d'emballage, en médecine galénique, comme adhésifs, rubans adhésifs et similaire. L'invention concerne également des mélanges de polymères contenant les polyesteruréthanes précités.

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