Branched isoolefin polymer prepared with adamantane catalyst sys

Details Branched isoolefin polymer prepared with adamantane catalyst sys Branched isoolefin polymer prepared with adamantane catalyst sys

1987-08-24

1990-07-17

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526183, 526185, 526221, 526237, 526335, 526339, 5253328, 5253337, 5253341, 525379, 525381, 525384, 525386, 525918, C08F 414, C08F 1010, C08F 3608

Patent

active

049422103

ABSTRACT:
Isobutylene homopolymers and copolymers are prepared using a catalyst system comprising a haloadamantane component and a Lewis acid. Branched polymers are prepared using polyhaloadamantanes, the branches being attached to the adamantane at the former location of the halide. The preferred catalyst systems are diethylaluminum chloride and bromoadamantane as well as polybromo, or polychloroadamantanes.

REFERENCES:
patent: 4602077 (1986-07-01), Cecchin et al.
Diem et al., "Isobutylene Polymerization in the Presence of UV Light, Organic Iodides and Zinc Iodide", Polym. Bull. 1, 281-86 (1979).

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