Polyurethane elastomers

Details Polyurethane elastomers Polyurethane elastomers

C - Chemistry, Metallurgy

08

G

C08G 18/76 (2006.01) C08G 18/30 (2006.01) C08G 18/48 (2006.01) C08G 18/65 (2006.01) C08G 18/66 (2006.01) C08G 18/79 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2239482

A polyisocyanate-based elastomer having a ratio of the storage modulus (E') at 20 °C and the storage modulus (E') at 120 °C of between 0.75 and 1.5, a tan .delta. at 100 °C of less than 0.1 and a maximum value of the tan .delta. of more than 0.8, the tan .delta. being the ratio of the loss modulus (E") and the storage modulus (E').

L'invention concerne un élastomère à base de polyisocyanate ayant un rapport module de conservation (E') à 20 DEG C/module de conservation (E') à 120 DEG C compris entre 0,75 et 1,5, une valeur de tan delta à 100 DEG C inférieure à 0,1 et une valeur maximale de tan delta dépassant 0,8, tan delta étant le rapport entre le module de perte (E'') et le module de conservation (E').

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