Synthesis of cis-1,4-polyisoprene rubber

Details Synthesis of cis-1,4-polyisoprene rubber Synthesis of cis-1,4-polyisoprene rubber

1998-10-07

1999-07-06

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526142, 5263402, C08F 4649, C08F 206, C08F13608

Patent

active

059198761

ABSTRACT:
The synthesis of cis-1,4-polyisoprene by polymerizing isoprene with a catalyst system which is comprised of a titanium tetrahalide, a trialkylaluminum compound and diphenylether is plagued with the formation of gel. This invention is based upon the unexpected discovery that gel formation can be reduced by conducting such polymerizations in the presence of a diarylamine, such as para-styrenated diphenylamine. The subject invention more specifically discloses a process for synthesizing cis-1,4-polyisoprene having a low gel content which comprises polymerizing isoprene in an inert organic solvent with a preformed catalyst system which is made by reacting an organoaluminum compound with titanium tetrahalide, such as titanium tetrachloride, in the presence of at least one ether, wherein said polymerization is conducted at a temperature which is within the range of about 0.degree. C. to about 100.degree. C., and wherein said polymerization is conducted in the presence of a diarylamine.

REFERENCES:
patent: 3047559 (1962-07-01), Mayor et al.
patent: 3165503 (1965-01-01), Kahn et al.
patent: 3684785 (1972-08-01), Hasegawa et al.
patent: 3687925 (1972-08-01), Fukui
patent: 3864278 (1975-02-01), LaHeij et al.

Affiliated with

Also associated with

Rating

Synthesis of cis-1,4-polyisoprene rubber 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 cis-1,4-polyisoprene rubber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesis of cis-1,4-polyisoprene rubber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-899769