Patent Number: 6,617,406

Title: Synthesis of elastomeric high trans-1,4-polybutadiene

Abstract: This invention is based upon the unexpected discovery that elastomerictrans-1,4-polybutadiene can be made by utilizing a catalyst system that iscomprised of an organocobalt compound, an organoaluminum compound, apara-alkyl substituted phenol, and ortho-phenyl phenol wherein the molarratio of the para-substituted phenol to the organoaluminum compound iswithin the range of about 1.2:1 to about 1.8:1, and wherein the molarratio of the ortho-phenyl phenol to the organoaluminum compound is withinthe range of about 0.7:1 to about 1.3:1. Accordingly, the elastomerictrans-1,4-polybutadiene made by the process of this invention does notneed to be heated, such as in a hot-house, before being used in makingrubber stocks.

Inventors: Castner; Kenneth Floyd (Uniontown, OH)

Assignee:

International Classification: C08F 136/00 (20060101); C08F 136/06 (20060101); C08F 004/70 (); C08F 136/06 ()

Expiration Date: 09/02015