Multilayer tubular structure having better resistance to extraction in biofuel and use thereof
US11339899B2 · kind B2 · utility
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13References
10Claims
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Key dates
| Filing date | Jan 12, 2017 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Mar 12, 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) for transport of alcohol-containing petrol. The MLT from the outside inwards has at least one barrier layer and at least one inner layer located below the barrier layer. The inner layer, or all the layers contain on average at most 1.5% of plasticizer relative to the total weight of the composition of each layer or to the total weight of all the compositions of the layers. The inner layer is predominantly made of at least one polyamide having more than 75% aliphatic units. The aliphatic polyamide has a mean number of carbon atoms per nitrogen atom selected from the following:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.