Synthesis of polymers of vinyl ethers, 1,5-hexadiene and N-vinylcarbazole
AssigneeQueen's University at Kingston
InventorsMichael C. Baird, Qinyan Wang
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Abstract
A process for the production of high molecular weight poly(vinyl ethers) and the like in which a selected monomer is polymerized in the presence of a metallocene-type catalyst is described. Vinyl ether monomers, N-vinylcarbazole and 1.5-10 hexadiene can be polymerized, in high yield using an initiator of the formula Cp*TiMe.sub.3 in the presence of a co-initiator of the formula B(C.sub.6 F.sub.5).sub.3. Novel dihydropyran polymers, such as poly 3,4-dihydropyran have also been produced.
Claims10
A process for polymerizing monomers selected from the group consisting of vinyl ethers, hexadienes, dihydrofurans, dihydropyrans and vinylcarbazoles, comprising reacting a selected said monomer in the presence of a catalyst comprising Cp*MMe.sub.3 where Cp* is .eta..sup.5 pentamethylcyclopentadienyl, M is selected from the group consisting of Titanium, Hafnium and Zirconium and Me is methyl;
- and a borane co-initiator in a solvent therefor.
Dependencies are inferred from the claim text.