Coupling of polymers made by cationic polymerization
AssigneeUniversity of Massachusetts Lowell
InventorRudolf Faust
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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 to 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.
Claims11
A method for coupling a cationic polymer, comprising the steps of:
- a) forming a reaction mixture of a cationic polymer and a bis(diphenylethylene) having the formula:
- ##STR6## wherein R.sub.1 includes at least one carbon, and R.sub.2 and R.sub.3 are hydrogen or alkyl groups;
- and
- b) exposing the reaction mixture to a temperature which causes the bis(diphenylethylene) to react with the cationic polymer, thereby coupling said cationic polymer.
Dependencies are inferred from the claim text.