Low-sag polyethylene pipes and methods thereof
US10501613B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jan 6, 2017 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Oct 15, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/062
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present disclosure relates to pipes comprising bimodal high molecular weight high density polyethylene which has been extruded in the presence of one or more organic peroxides that are present in an amount ranging from 30 ppm to 200 ppm. The pipe has an improved long-term hydrostatic strength. Also provided are methods for preparing pipes having these characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.