Polypropylene having improved long chain branching
US6699919B1 · kind B1 · utility
5Cited by
7References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 4, 2002 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Jan 4, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G81/021
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polypropylene having improved long chain branching increased melt strength obtained by irradiating polypropylene with an electron beam having an energy of at least 5 MeV and with a radiation dose of from 5 to 100 kGray in the presence of a grafting agent, the branching index of the obtained polypropylene being lower than 0.7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.