Polyolefinic molding composition having improved resistance to thermooxidative degradation and its use for the production of pipes
US8728370B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2006 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Apr 19, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A molding composition is suitable for the production of pipes having improved resistance to thermooxidative degradation when these pipes are in long-term contact with liquids comprising disinfectants having an oxidizing effect. Such molding composition comprises, in addition to thermoplastic polyolefins, a polyoxy compound and/or a polyhydroxy compound as additive in an amount of from 0.01 to 1.0% by weight. In addition, the molding composition can further comprise an unsaturated aliphatic hydrocarbon in an amount of up to 5% by weight. The invention also relates to a process for improving the long-term resistance of water pipes to damage caused by oxidizing disinfectants from the water by use of this molding composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.