Functionalized polypropylenes and process for production
US6426389B2 · kind B2 · utility
4Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Jan 31, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F255/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel process for preparing functionalized polypropylenes entailing apportioned introduction of free radical initiator is described. Also described are novel functionalized polypropylenes having a yellowness index color of at least 77 and a Brookfield Thermosel viscosity of greater than 7000 cP at 190° C. Preferably, the functionalized polypropylenes are further characterized by having an acid number greater than 6 milligrams of KOH per gram of polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.