Polyolefin composition for pipes and fittings with increased resistance to chlorine dioxide
US9873776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2012 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Nov 2, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a polyolefin composition with increased resistance to degradation caused by ClO2-containing water and to a pipe or a fitting made of such a polyolefin composition. The polyolefin composition comprises a polyolefin base resin (A), an antioxidant (B) having a chroman-6-ol structure, and an antioxidant (C) having a phenolic structure and the molecule comprises at least one ester group. The present invention further relates to the use of the polyolefin composition for the production of a pipe or a fitting and to the use of the polyolefin composition for increasing the lifetime of a pipe or a fitting providing the polyolefin composition with resistance against degradation caused by contact with ClO2-containing water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.