Process for producing polybutadiene rubber with enhanced mechani

Details Process for producing polybutadiene rubber with enhanced mechani Process for producing polybutadiene rubber with enhanced mechani

1982-12-21

1984-09-18

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525246, 525247, 526140, C08F 426

Patent

active

044725590

ABSTRACT:
A polybutadiene rubber having an enhanced mechanical strength is produced in such a manner that the contents of water and carbon disulfide in a solution of 1,3-butadiene and carbon disulfide in an inert organic solvent is controlled to 0.2 to 5 m moles and 20 m moles or less, respectively, per liter of the 1,3-butadiene-carbon disulfide solution; a first polymerization mixture is prepared from the controlled 1,3-butadiene-carbon disulfide solution, an organic aluminum compound of the formula Al R.sub.n X.sub.3-n, wherein R=C.sub.1-6 alkyl, phenyl, or cycloalkyl, X=halogen, and n=1.5-2.0, and a cobalt compound, for example, by aging a mixture of the controlled 1,3-butadiene-carbon disulfide solution with the aluminum compound for at least one minute and then by admixing the aged mixture with the cobalt compound; the first polymerization mixture is subjected to a cis-1,4-polymerization; a second polymerization comprising the resultant cis-1,4-polybutadiene, non-reacted 1,3-butadiene, the inert organic solvent, an organic aluminum compound of the formula AIR.sub.3, a cobalt compound, and the carbon disulfide is subjected to a 1,2-polymerization to produce a polybutadiene rubber consisting essentially of 5% to 30% by weight of a boiling n-hexane-insoluble fraction and 70% to 95% by weight of a boiling n-hexane-soluble fraction thereof; and after the 1,2-polymerization is shortstopped, the resultant polybutadiene rubber is isolated from the 1,2-polymerization mixture.

REFERENCES:
patent: 3778424 (1973-12-01), Sugiura
patent: 3901868 (1975-08-01), Ueno
patent: 4182814 (1980-01-01), Bernemann
patent: 4303769 (1981-12-01), Odar
patent: 4340685 (1982-07-01), Takeuchi

Affiliated with

Also associated with

Rating

Process for producing polybutadiene rubber with enhanced mechani 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 producing polybutadiene rubber with enhanced mechani, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing polybutadiene rubber with enhanced mechani will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-794804