Process for preparing improved halogenated butyl rubber

Details Process for preparing improved halogenated butyl rubber Process for preparing improved halogenated butyl rubber

1984-04-05

1987-07-21

Schofer, Joseph L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253323, C08F 820

Patent

active

046819215

ABSTRACT:
Improved halogenated butyl rubbers are prepared by isomerizing the polymers so that a significant mole fraction of the halogen is in the primary allylic position. The isomerization is carried out utilizing as a catalyst either a Friedel Crafts catalyst or HBr.

REFERENCES:
patent: 3099644 (1963-07-01), Parker et al.
patent: 3816371 (1974-06-01), Baldwin et al.
patent: 3919131 (1975-11-01), Malatesta et al.
patent: 3965213 (1976-06-01), Baldwin et al.
patent: 4145492 (1979-03-01), Gardner
patent: 4288575 (1981-09-01), Gardner

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