Reactor blend polypropylene, process for the preparation thereof and process for preparing metallocene ligands
US6107431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1998 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Jan 29, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Fractionable, reactor blend polypropylenes, directly obtainable from the polymerization reaction of propylene, having: PA1 (a) content of isotactic pentads (mmmm) comprised between 25 and 85%; PA1 (b) ratio M.sub.w /M.sub.n <5; containing from 10 to 70% by weight of a fraction soluble in boiling diethyl ether, said fraction having a content of isotactic pentads (mmmm) comprised between 5 and 25%, and from 30 to 90% by weight of a boiling n-heptane-insoluble fraction, soluble in xylene at 135.degree. C., said fraction having a content of isotactic pentads (mmmm) comprised between 50 and 99%, are disclosed. These polymers are suitable as thermoplastic-elastomeric materials. A process for the preparation of these polymers and a process for the preparation of 2-aryl-substituted indenyl metallocene ligands is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.