Process for the synthesis of a high vinyl isoprene-butadiene cop

Details Process for the synthesis of a high vinyl isoprene-butadiene cop Process for the synthesis of a high vinyl isoprene-butadiene cop

1990-10-22

1991-10-29

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 91, 526 92, 526337, C08F 452, C08F23606

Patent

active

050617656

ABSTRACT:
Isoprene-butadiene copolymers having high vinyl contents can be synthesized in organic solvents to high yields after short polymerization times by utilizing the process of this invention. The isoprene-butadiene copolymers made utilizing the process of this invention have a glass transition temperature which is within the range of about 0.degree. C. to about -60.degree. C. and can be employed in tire treads which provide improved traction and improved cut growth resistance. This invention specifically discloses a process for the synthesis of isoprene-butadiene copolymers having a high vinyl content which comprises copolymerizing isoprene monomer and butadiene monomer in an organic solvent at a temperature which is within the range of about -10.degree. C. to about 100.degree. C. in the presence of a catalyst system which is comprised of (a) an organoiron compound, (b) an organoaluminum compound, (c) a chelating aromatic amine, and (d) a protonic compound; wherein the molar ratio of the chelating amine to the organoiron compound is within the range of about 0.1:1 to about 1:1, wherein the molar ratio of the organoaluminum compound to the organoiron compound is within the range of about 5:1 to about 200:1, and wherein the molar ratio of the protonic compound to the organoaluminum compound is within the range of about 0.001:1 to about 0.2:1.

REFERENCES:
patent: 3678022 (1972-07-01), Bozik et al.
patent: 3686158 (1972-08-01), Bouton et al.
Sun and Wang, 2 Acta Polymerica Sinica 145 (1988).

Affiliated with

Also associated with

Rating

Process for the synthesis of a high vinyl isoprene-butadiene cop does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the synthesis of a high vinyl isoprene-butadiene cop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the synthesis of a high vinyl isoprene-butadiene cop will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1401283