Barrier structure made from mxdt/xt copolyamide with high tg

一种共聚酰胺、结构体的技术，应用在阻隔结构体领域，能够解决没有提及结构体阻隔性等问题

Pending Publication Date: 2018-08-03
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Very large quantities of polyamide are required, and although polyamide compositions can be used to prepare monolayer or multilayer structures, no mention is made of the barrier properties of such structures and especially structures comprising MXDT / XT copolyamide

Method used

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  • Barrier structure made from mxdt/xt copolyamide with high tg
  • Barrier structure made from mxdt/xt copolyamide with high tg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0239] 1) Preparation of MXDT / 10T and comparative polyamide

[0240] 5 kg of the following feedstock were introduced into a 14 liter autoclave reactor:

[0241] -500g water,

[0242] - one or more diamines,

[0243] - amino acids (optional),

[0244] - one or more diacids,

[0245] - monofunctional chain regulator: benzoic acid or stearic acid in an amount suitable for the target viscosity,

[0246] - 35 g of sodium hypophosphite in solution,

[0247] - 0.1 g Wacker AK1000 defoamer (Wacker Silicones).

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Abstract

The invention concerns a barrier structure intended for the storage and / or transport of fluids comprising at least one barrier layer (1) comprising an MXDT / XT copolyamide in which: MXDT is an amide unit present in a molar ratio of between 5 and 45%, preferably between 15 and 45%, and more preferably between 20 and 45%, where MXD represents m-xylylenediamine (MXD) and T represents terephthalic acid, XT is a majority amide unit present in a molar ratio of between 55 and 95%, preferably between 55 and 85%, and more preferably between 55 and 80%, where X is a C9 to C18, preferably C9, C10, C11 andC12, linear aliphatic diamine, and where T is terephthalic acid, said copolyamide having a melting point: 250 DEG C<Tf< / =300 DEG C as determined according to standard ISO 1 1357-3(2013).

Description

technical field [0001] The present invention relates to barrier structures based on MXDT / XT copolyamides with high Tg, said structures being free of reinforcing fibers. The structure may consist of a single layer of the polyphthalamide, or comprise a layer of MXDT / XT polyphthalamide and at least one layer of another material. [0002] The barrier structure is suitable for use in articles for fluid storage and / or transport, such as bottles, cans, containers, tubes and receptacles of any type. The structure may also be in the form of a film with which, for example, packaging is made which requires a barrier to fluids such as gases. All these articles exhibit good barrier properties, that is to say a very low permeability to fluids, especially motor vehicle fluids, especially fuel. [0003] The present invention also relates to the use of an MXDT / XT copolyamide having a high Tg for the preparation of structures, in particular multilayer structures, comprising at least one barri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/26B32B27/34B65D65/40B65D1/02C08L77/06
CPCC08G69/265C08L77/06B32B2307/7265B32B7/10B32B27/08B32B27/285B32B27/286B32B27/302B32B27/365B32B2250/02B32B2250/03B32B2250/04B32B2250/24B32B2262/106B32B2264/0207B32B2264/0235B32B2264/025B32B2264/0257B32B2264/10B32B2264/108B32B2270/00B32B2307/306B32B2307/546B32B2605/18B32B27/34B32B27/20B32B27/22B32B27/306C08J5/18C08K3/04C08K2201/017B32B2307/7244Y10T428/1352Y10T428/1379Y10T428/1383B32B2439/60B65D65/40
Inventor T.布里福德M.卡佩洛特N.杜福勒
Owner ARKEMA FRANCE SA
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