Abstract: A process for cationically polymerizing olefin monomers in a reaction mixture includes the step of contacting olefin monomers and a catalytically effective amount of an initiating composition containing (A) a heterogeneous Lewis acid coinitiator selected from the group consisting of open chain and cyclic aluminoxane compounds and (B) an initiator selected from the group consisting of (i) organic compounds, (ii) halogens, (iii) interhalogens; (iv) Brönsted acids, (v) boron halides; and (vi) silicon compounds. A novel initiator system is further disclosed.

Abstract: A method is provided for cationically polymerizing olefin monomer by employing the step of using a novel coinitiator in an organic phase or a neat monomer reaction phase. More specifically, a method is provided for cationically polymerizing olefin monomer by employing the step of using a novel coinitiator in an organic phase or a neat monomer reaction phase, wherein the organic phase is a hydrocarbon solution of the monomer or a halogenated-hydrocarbon solution of the monomer and wherein the neat-monomer reaction phase is a liquid monomer.

Abstract: A method is provided for cationically polymerizing olefin monomer by using a novel coinitiator in the presence of water. More specifically, a method is provided for cationically polymerizing olefin monomer by using a novel coinitiator in an aqueous suspension or aqueous emulsion polymerization process.