Diblock copolymers prepared by cross metathesis
US8940839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2011 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Mar 4, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/419
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a composition comprising a multiblock polyolefin represented by the formula: PO—C(R11)(R12)—C(R13)═C(R14)—C(R15)(R16)—PO*, or isomers thereof, wherein R11, R12, R13, R14, R15, and R16, are each independently a substituted or unsubstituted C1 through C4 hydrocarbyl group or a hydrogen; PO and PO* are polyolefins; PO and PO* are each independently a substituted or unsubstituted hydrocarbyl group having 9 to 4000 carbon atoms, provided that at least one of PO and PO* are C20 or greater, said polyolefin having: 1) an internal unsaturation as shown by the 13C NMR peak at between about 128 and about 132 ppm; 2) an Mn ratio “Z”=0.1 to 10 where Z is the Mn (as determined by 13C NMR) divided by Mn (as determined according to Gel Permeation Chromotography using polystyrene standards); and 3) optionally, from 0.3(J) and 0.75(J) internal unsaturations per 1000 carbons as determined by 1H NMR spectroscopy, where J is the number of reactive groups per 1000 carbons for the mixture of vinyl terminated polyolefins that become PO and PO*, before they are coupled by an alkene metathesis catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.