Thermoplastic polyurethanes containing units of an aromatic...

Details Thermoplastic polyurethanes containing units of an aromatic... Thermoplastic polyurethanes containing units of an aromatic...

C - Chemistry, Metallurgy

08

G

C08G 18/32 (2006.01) C08G 18/74 (2006.01)

Patent

CA 2230458

The present invention is a rigid thermoplastic polyurethane having a Tg of at least 50 ~C having a sufficient concentration of units of an aromatic diol to lower the temperature at which the rigid thermoplastic polyurethane can be melt processed. The present invention is also a thermoplastic polyurethane with a flex modulus of at least 690,000 kPa (100,000 psi), and having a sufficient concentration of units of an aromatic diol to lower the temperature at which the thermoplastic polyurethane can be melt processed. The compositions of the present invention show improved processability with insubstantial loss of physical properties.

Polyuréthane thermoplastique rigide présentant une T¿g? d'au moins 50 ·C et une concentration suffisante d'unités d'un diol aromatique pour abaisser la température à laquelle ce polyuréthane thermoplastique rigide peut être soumis à une transformation par fusion. L'invention porte également sur un polyuréthane thermoplastique d'un module de flexion d'au moins 69.000 kPa (100.000 psi) et présentant une concentration suffisante d'unités d'un diol aromatique pour abaisser la température à laquelle il peut être soumis à une transformation par fusion. Les compositions de cette invention présentent une aptitude améliorée à la transformation avec perte minime de leurs qualités physiques.

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