Branched crystalline polypropylene
US7439312B2 · kind B2 · utility
2Cited by
50References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2003 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Apr 12, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Branched crystalline polypropylene compositions and methods for the preparation of branched crystalline polypropylene compositions are provided. For example, described herein is a process of preparing a branched crystalline polypropylene composition that includes combining two or more different metallocene catalyst compounds with a polymerization medium that includes propylene, for a time sufficient to provide branched crystalline polypropylene that has from 0.0 wt % to 2.0 wt % ethylene and a heat of fusion of 70 J/g or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.