Blend of high-molecular-weight polypropylene and high-molecular weight ethylene-propylene copolymer with broad molecular weight distribution
US5962595A · kind A · utility
14Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1997 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | May 22, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2308/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a high-molecular-weight reactor blend comprising a high-molecular weight polypropylene and a high-molecular weight ethylene-propylene copolymer and having an ethylene content in the range from 0.1 to 2% by weight based on the total amount of blend, a melt flow index MFR (230/5) of .ltoreq.5 dg/min and a molecular weight distribution M.sub.w /M.sub.n in the range from 6 to 20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.