Process for making a propylene polymer with free-end long chain branching and use thereof
US5047485A · kind A · utility
77Cited by
6References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1989 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Feb 21, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a process for making a normally solid, gel-free, amorphous to predominantly crystalline, propylene polymer material having free-end branches of propylene units and strain hardening elongational viscosity by peroxide decomposition of the propylene polymer material in the substantial absence of oxygen at certain temperatures for certain periods of time, and then deactivating the free radicals in the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.