Process for preparing improved halogenated butyl rubbers

Details Process for preparing improved halogenated butyl rubbers Process for preparing improved halogenated butyl rubbers

1985-12-09

1987-01-06

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...

5253328, 5253331, C08F 820

Patent

active

046347410

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: 2809372 (1957-10-01), Frederick et al.
patent: 3042662 (1962-07-01), Cottle et al.
patent: 3515687 (1970-06-01), Listner
patent: 4486575 (1984-12-01), Newman et al.
patent: 4563506 (1986-01-01), Kowalski et al.

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