Polyamide-based composition for pipes containing oil or gas
US12060516B2 · kind B2 · utility
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29Claims
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Key dates
| Filing date | Apr 7, 2017 |
| Grant date | Aug 13, 2024 |
| Priority date | — |
| Expiry date | Aug 9, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/18
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to the use of a composition comprising at least one polyamide, of which at least one is a semicrystalline copolyamide comprising at least one minor motif resulting from the polycondensation of: at least one diamine with at least one polymerised fatty acid, in particular a fatty acid dimer; or at least one diamine dimer with at least one carboxylic acid; or at least one amino acid dimer; or mixtures of same, as a sealing coating in a pipe containing oil or gas, said pipe being used in the operation of offshore oil or gas deposits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.