Extrudable highly crystalline thermoplastic polyurethanes

Details Extrudable highly crystalline thermoplastic polyurethanes Extrudable highly crystalline thermoplastic polyurethanes

C - Chemistry, Metallurgy

08

G

C08G 18/65 (2006.01) C08G 18/08 (2006.01) C08G 18/32 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C08G 18/76 (2006.01)

Patent

CA 2470439

A thermoplastic polyurethane composition having a high crystalline content which advantageously can be processed in an extruder. The composition includes a crystallization retarding component of a short chain or monomeric diol which is branched, substituted or contains further heteroatoms, or a combination thereof. The crystallization retarding component delays the onset of crystallization during extrusion processing until the composition has exited the extruder.

L'invention concerne une composition de polyuréthannes thermoplastiques présentant une teneur élevée en cristaux. Cette composition peut être avantageusement traitée dans une extrudeuse. La composition selon l'invention contient un composant retardateur de cristallisation constitué d'une courte chaîne ou d'un diol monomère ramifié, substitué ou contenant des hétéroatomes, ou d'une combinaison de ceux-ci. Ce composant retardateur de cristallisation permet de retarder le début de la cristallisation pendant le traitement par extrusion, jusqu'à ce que la composition soit sortie de l'extrudeuse.

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