Multilayer tubular structure having better resistance to extraction in biofuel and use thereof
US11161319B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Jan 12, 2017 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | May 20, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1393
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multilayer tubular structure MLT intended for the transport of petrol. The MLT has at least one inner barrier layer and at least one outer layer located above the barrier layer. All the layers located above the barrier layer contain from 0 to 5% of plasticizer relative to the total weight of the composition of the layer. The outer layer is predominantly at least one aliphatic polyamide. The polyamide(s) has a number of carbon atoms per nitrogen atom selected from the following:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.