Heterophasic propylene copolymer for corrugated sheet and cast film applications
US8314180B2 · kind B2 · utility
0Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Feb 3, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24694
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention concerns heterophasic propylene copolymers, comprising a propylene homopolymer (PPH) and an ethylene-propylene rubber (EPR), having a broad molecular weight distribution and a well-defined total ethylene content and a specific ratio of the intrinsic viscosities of the ethylene-propylene rubber (EPR) and the propylene homopolymer (PPH), ηEPR/ηPPH. The invention further concerns the process to produce such heterophasic propylene copolymers. The heterophasic propylene copolymers of the present invention are particularly suited for corrugated sheet and cast film applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.