Synthesis of trans-1,4-polybutadiene

Details Synthesis of trans-1,4-polybutadiene Synthesis of trans-1,4-polybutadiene

1997-05-21

1998-11-10

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 88, 526335, 526907, C08F 470, C08F13606

Patent

active

058345736

ABSTRACT:
By utilizing the techniques of this invention, trans-1,4-polybutadiene can be synthesized continuously to a high level of conversion utilizing a low level of a highly active cobalt-based catalyst system. The trans-1,4-polybutadiene made with the cobalt-based catalyst system of this invention also typically has a molecular weight which is acceptable for use in tire applications without the need for employing a molecular weight regulator. It is also not typically necessary to utilize a gel inhibitor, such as carbon disulfide, in the polymerizations of this invention. Since a low level of residual cobalt is present in the trans-1,4-polybutadiene which is made utilizing the catalyst system of this invention, it is much more stable than trans-1,4-polybutadiene made with standard cobalt-based catalyst systems. This invention specifically relates to a process for synthesizing trans-1,4-polybutadiene by polymerizing 1,3-butadiene monomer in the presence of a catalyst system which is comprised of cobalt (III) acetylacetonate, an organoaluminum compound and a para-alkyl-substituted phenol, wherein the cobalt (III) acetylacetonate is mixed with the para-substituted phenol prior to the polymerization. Such polymerizations can be conducted on a batch or a continuous basis.

REFERENCES:
patent: 5089574 (1992-02-01), Castner
patent: 5448002 (1995-09-01), Castner

Affiliated with

Also associated with

Rating

Synthesis of trans-1,4-polybutadiene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synthesis of trans-1,4-polybutadiene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesis of trans-1,4-polybutadiene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1517650