Preparation of long-chain branched isotactic polypropylene
US8445608B2 · kind B2 · utility
2Cited by
3References
9Claims
0Family size
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Key dates
| Filing date | Dec 14, 2009 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Dec 14, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/65925
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention discloses a method for preparing long-chain-branched isotactic polypropylene by first oligomerizing propylene with a suitable oligomerization catalyst system and then copolymerizing propylene and the oligomer obtained in situ with a mono-aryl-substituted methylene bridged catalyst system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.