Polypropylene composition resistant to high energy radiation, and radiation sterilized articles therefrom
US4888369A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1987 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Apr 24, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/526
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a high energy radiation resistant, polypropylene composition. It consists essentially of substantially crystalline normally solid polypropylene having a narrow molecular weight distribution, and, dispersed therein at a concentration effective to increase substantially the high energy radiation resistance of the polypropylene, a synergistic mixture of: PA1 (1) a hindered amine component, PA1 (2) a hindered phenolic component, and PA1 (3) a phosphorous containing component, the weight ratios of component (1) to component (2) to component (3) being about 1:(0.1-2):(0.1-2). Also disclosed are radiation sterilized articles in which at least part of the material of construction comprises the polypropylene composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.