High energy radiation stabilization of semi-crystalline polymers
US4710524A · kind A · utility
12Cited by
10References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1985 |
| Grant date | Dec 1, 1987 |
| Priority date | — |
| Expiry date | Aug 5, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3435
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A radiation stabilized and sterilized, flexible article is comprised of a semi-crystalline polymer having a crystalline content of from twenty percent to ninety percent. This polymer has been irradiated with a sterilizing amount of high energy radiation while having incorporated therein radiation stabilizing amounts of a hindered piperidine compound a benzophenone precursor sufficient to render the article substantially resistant to radiolysis while retaining its flexibility. A method for sterilizing and radiation stabilizing a semi-crystalline polymer is also part of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.