Coupling of polymers made by cationic polymerization

Details Coupling of polymers made by cationic polymerization Coupling of polymers made by cationic polymerization

1997-11-24

1998-07-07

Zemel, Irina S.

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

Synthetic resins

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

3253338, 3253339, 3253593, C08F 1010

Patent

active

057770441

ABSTRACT:
A method for coupling a cationic polymer includes forming a reaction mixture of a cationic polymer and a bis(diphenylethylene). The reaction mixture is exposed to a temperature which causes the bis(diphenylethylene) to react with the cationic polymer, thereby coupling the cationic polymer. In another embodiment, the method includes forming a reaction mixture of an oxo-acid and a isopropenyl polyisobutylene. The reaction mixture is exposed to a temperature below about -30.degree. C., whereby the oxo-acid reacts with isopropenyl polyisobutylene, thereby coupling the polymer.

REFERENCES:
patent: 5395885 (1995-03-01), Kennedy et al.
patent: 5458796 (1995-10-01), Storey et al.
Hasegawa et al., "Selective Dimerization of Diisobutylene by Oxo Acids:Synthesis of Isobutylene Tetramer", Journal of Applied Polymer Science, 27, p. 171-181, 1882.

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