Polyolefin composition with increased resistance to ClO2-containing water
US9376548B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2013 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Dec 31, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0318
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a polyolefin composition comprising a polyolefin base resin and an antioxidant, characterized in that said polyolefin composition has a lifetime of at least 200 h in a test measuring the resistance against ClO2-containing water at 90° C. and at a concentration of ClO2 of 4 ppm wherein the equipment used is according to ASTM F2263-03.The present invention further relates to a pipe comprising the polyolefin composition according to the invention, to the use of the polyolefin composition for the production of a pipe, and to the use of a particularly selected antioxidant for increasing the resistance of a polyolefin composition against degradation caused by contact with ClO2-containing water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.