Process for producing highly branched polyisoolefins

Details Process for producing highly branched polyisoolefins Process for producing highly branched polyisoolefins

1997-07-07

2000-12-05

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263486, 5263487, C08F 412

Patent

active

061568597

ABSTRACT:
Highly branched polyisoolefines are produced according to the invention by the polymerization of isoolefines in a single-stage process, in solution, suspension or in the gas phase in the presence of bifunctional monomers which contain at least one group capable of cationic polymerization and at least one group which serves as an initiator for the cationic polymerization of isoolefines (inimer), at temperatures from +20 to -100.degree. C., optionally in the presence of inert, organic solvents, and in the presence of alkylalumoxanes (coinitiator).

REFERENCES:
patent: 3948868 (1976-04-01), Powers
patent: 4074035 (1978-02-01), Powers
patent: 5084522 (1992-01-01), Frechet
patent: 5458796 (1995-10-01), Storey et al.
T.M. Marsalki, I. Najoros, and J. P. Kennedy, "Multi-arm star polyisbutylenes" in Polymer Bulletin 31, 1993, pp. 665-672.
H. C. Wqang, K. W. Powers, and J. V. Fusco, "Star Branched Butyl- a novel butyl rubber for improved processability" (Introduction only) Paper No. 21 presented at a meeting of the Rubber Division, American Chemical Society, Mexico City, Mexico, May 9-12, 1989, p. 1.
J. P. Kennedy and B. Ivan, "Designed Polmers by Carbocationic Macromolecular Engineering: Theroy and Practice", 1991, pp. 5-31.

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