Highly branched, low molecular weight polyolefins and methods for their production
AssigneeNorthwestern University
InventorsTobin Jay Marks, Yanshan Gao, Tracy L. Lohr, Qian Wang, Yip-Wah Chung, David B. Pickens, III
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Abstract
Low molecular weight, highly branched polyolefins are provided. Also provided are catalyst-mediated methods of making the low molecular weight, highly branched polyolefins and a catalyst system for carrying out the methods. The catalyst system is a homogeneous catalytic system that includes a single-site organozirconium complex and hydrocarbon-soluble perfluoroarylborate co-catalyst that is highly active for the oligomerization of olefin monomers in non-polar media.
Claims13
A method for olefin oligomerization, the method comprising combining olefin monomers with a single-site organozirconium complex and a perfluoroarylborate compound in a non-polar non-coordinating solvent or a halogenated solvent, whereby the single-site organozirconium complex and the perfluoroarylborate compound mediate the oligomerization of the olefin monomers into an olefin oligomer comprising branches having end groups comprising vinyl groups, vinylidene groups, or a combination thereof, and reacting the end groups with one or more reactants to form functionalized end groups.
A method for olefin oligomerization, the method comprising combining α-olefin monomers with a single-site organozirconium complex and a perfluoroarylborate compound in a non-polar non-coordinating solvent or a halogenated solvent, whereby the single-site organozirconium complex and the perfluoroarylborate compound mediate the oligomerization of the olefin monomers into an olefin oligomer, wherein the α-olefin monomers comprise 1-hexene monomers.
A method for olefin oligomerization, the method comprising combining olefin monomers with a single-site organozirconium complex and a perfluoroarylborate compound in a non-polar non-coordinating solvent or a halogenated solvent, whereby the single-site organozirconium complex and the perfluoroarylborate compound mediate the oligomerization of the olefin monomers into an olefin oligomer, wherein the perfluoroarylborate compound has the structure:
- where:
- each R1, R2, R3, R4, and R5 is independently chosen from H, F, Cl, substituted or unsubstituted (C4-C40) alkyl, substituted or unsubstituted (C4-C40)alkenyl, and substituted or unsubstituted (C4-C40)cycloalkyl, wherein the substituted (C4-C40)alkyl and substituted (C4-C40)cycloalkyl are substituted with one or more RS, where each RS is chosen from (C1-C20)alkyl and halogen;
- provided that at least one of R1, R2, R3, R4, or R5 is chosen from substituted or unsubstituted (C4-C30)alkyl and substituted or unsubstituted (C4-C40)cycloalkyl.
Dependencies are inferred from the claim text.