Polybutadiene and process for producing the same

Details Polybutadiene and process for producing the same Polybutadiene and process for producing the same

C - Chemistry, Metallurgy

08

F

C08F 136/06 (2006.01) C08C 19/26 (2006.01) C08F 236/04 (2006.01)

Patent

CA 2349966

Modified polybutadiene having a high-cis and low-trans structure with a moderate 1,2-structure content and exhibiting improved characteristics such as cold flow properties, which is obtained by modifying starting polybutadiene having a Tcp/ML1+4 ratio (Tcp: 5% toluene solution viscosity at 25°C.ML1+4: Mooney viscosity at 100°C) of 2.5 or more in the presence of a transition metal catalyst.

Polybutadiène modifié ayant une structure à forte concentration de cis et à faible concentration de trans avec une teneur modérée en 1,2-structure et affichant des propriétés améliorées comme des propriétés de fluage, qui sont obtenues en modifiant le polybutadiène de départ ayant un ratio Tcp/ML1+4 (Tcp: 5 % viscosité de la solution de toluène à 25.degrés.C.ML1+4: viscosité de Mooney à 100.degrés.C) de 2,5 ou plus en présence d'un catalyseur métallique de transition.

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