Barrier structure made from BACT/XT copolyamide with a high Tg
US11813828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2017 |
| Grant date | Nov 14, 2023 |
| Priority date | — |
| Expiry date | Dec 25, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2390/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a structure comprising at least one layer (1) comprising a BACT/XT copolyamide in which: —BACT is a unit with an amide moiety having a molar ratio of between 20 and 70%, preferably between 25 and 60%, and more preferably between 35 and 55%, where BAC is chosen from 1,3-bis (aminomethyl) cyclohexyl (1,3 BAC), 1,4-bis (aminomethyl) cyclohexyl (1,4 BAC) and a mixture of same, and T is terephthalic acid, —XT is a unit with an amide moiety having a molar ratio of between 30 and 80%, preferably between 40 and 75%, and more preferably between 45 and 65%, where X is a C9 to C18, preferably C9, C10, C11 and C12, linear aliphatic diamine, and where T is terephthalic acid, preferably a C10, C11 and C12 terephthalic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.