High crystallinity, high melt flow rate polypropylene
US7465776B2 · kind B2 · utility
6Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 2007 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | May 30, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High melt flow rate high crystallinity polypropylene homopolymer are produced in a bulk polymerization process using a Ziegler-Natta catalyst containing a combination of two internal electron donors and selected external donors. The high melt flow rate, high crystallinity polypropylene homopolymers produced according to the current invention display improved flexural modulus and tensile yield stress when nucleated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.