Use of deaminatively-generated carbocation as polymerization initiators
AssigneeMcNeese State University
InventorsRon W. Darbeau, Mark S. Delaney, Ulku Ramelow
Life of this patent
Estimating the term…
Abstract
Deaminatively generated carbocations to initiate addition polymerization are disclosed. The high reactivity of the carbocation allows initiation of polymerization with virtually all alkenes, alkynes, alicyclic and aromatic monomers, regardless whether multisubstituted or conjugated. In addition, the carbocation initiates a polymerization reaction that generates an extremely high molecular weight polymer. In particular polystyrene of viscosity average molecular weight of approximately 106 was obtained.
Claims25
A method of cationic polymerization or oligomerization comprising the steps of:
- (a) preparing a carbocation initiator by deamination;
- and
- (b) combining said carbocation initiator with an unsaturated monomer to form a mixture.
A method of polymerizing styrene comprising the steps of:
- (a) preparing a carbocation initiator by thermolysis of a N-alkyl-N-nitrosoamide;
- and
- (b) combining said carbocation initiator with styrene monomer and a solvent to form a mixture.
A method of polymerizing isobutylene comprising the steps of:
- (a) preparing a carbocation initiator by thermolysis of a N-alkyl-N-nitrosoamide;
- and
- (b) combining said carbocation initiator with isobutylene monomer and a solvent to form a mixture.
A method of cationic copolymerization comprising the steps of:
- (a) preparing a carbocation initiator by deamination;
- and
- (b) combining said carbocation initiator with a first monomer and a second monomer to form a mixture.
Dependencies are inferred from the claim text.