Storage stabilized oxygen degradable polymer
US6418702B2 · kind B2 · utility
0Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2001 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jul 23, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1352
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
This invention concerns a stabilized packaging environment for a particulate vinyl lactam polymer, particularly polyvinylpyrrolidone particles, which comprises a sealed, oxygen-impervious receptacle containing the polymer particles and a separate air permeable package within the receptacle containing a water moistened oxygen scavenging agent, preferably iron powder, an iron (II) salt, ascorbic acid or a mixture of such agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.