Title:
METHOD FOR PRODUCING POLYBUTADIENE COMPOSITION AND RUBBER COMPOSITION COMPRISING POLYBUTADIENE COMPOSITION
Document Type and Number:
Japanese Patent JP2023147371
Kind Code:
A
Abstract:
To provide a polybutadiene composition comprising a syndiotactic 1,2-polybutadiene and a cis-1,4-polybutadiene having high linearity, and further, to improve low fuel consumption while maintaining hardness in a rubber composition comprising the polybutadiene composition.SOLUTION: There is provided a polybutadiene composition comprising a cis-1,4-polybutadiene and a syndiotactic 1,2-polybutadiene, wherein the absolute molecular weight and intrinsic viscosity are measured by the GPC-LLS-RI-VIS analysis method (gel permeation chromatography-laser light scattering-differential refractive index-viscosity analysis method) for a cis-1,4-polybutadiene, the average value of the slope in the range of the absolute molecular weight of 100000 to 1000000 of the Mark-Houwink plot obtained by plotting the logarithm of absolute molecular weight on the horizontal axis and the logarithm of the intrinsic viscosity on the vertical axis is 0.68 or more.SELECTED DRAWING: None
Inventors:
KAMBAYASHI KO
Application Number:
JP2022054828A
Publication Date:
October 13, 2023
Filing Date:
March 30, 2022
Export Citation:
Assignee:
UBE ELASTOMER CO LTD
International Classes:
C08L9/00; B60C1/00; C08F4/602; C08F136/06
Attorney, Agent or Firm:
Patent Attorney Corporation Tsukuni