Process for producing substantially gel-free butadiene-isobutyle

Details Process for producing substantially gel-free butadiene-isobutyle Process for producing substantially gel-free butadiene-isobutyle

1981-09-11

1983-06-28

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526237, C08F 414

Patent

active

043906737

ABSTRACT:
The invention relates to a process for producing substantially gel-free copolymers of butadiene and isobutylene having number average molecular weights of from about 50,000 to about 200,000 and levels of unsaturation of from about 3 weight percent to about 25 weight percent. The process which is homogeneous in nature involves polymerizing the monomers in an aliphatic solvent or mixture of such solvents in the presence of a BF.sub.3 /ROH catalyst system at a temperature of below -95.degree. C.

REFERENCES:
patent: 2423760 (1947-07-01), Elmore
patent: 2607764 (1952-08-01), Nelson
patent: 2901471 (1959-08-01), Pavlick

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