Scalable production of precision hydrocarbons from trialkylaluminum via ternary living coordinative chain transfer polymerization
US9416069B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2011 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Feb 3, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a method of producing a polyolefin composition comprising contacting a metallocene pre-catalyst, a co-catalyst, a primary surrogate, and a secondary surrogate; adding a first olefin monomer; and polymerizing the first monomer for a time sufficient to form the polyolefin. Also disclosed is a method of producing a block polyolefin composition comprising contacting a metallocene pre-catalyst, a co-catalyst, a primary surrogate, and a secondary surrogate; polymerizing the first monomer for a time sufficient to form the polyolefin; adding a second monomer; and polymerizing the second olefin monomer for a time sufficient to form said block polyolefin composition. The method allows for the production of polyolefins of low molecular weights and narrow molecular weight distributions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.