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Multi-layered structure containing a barrier polymer optionally reinforced against impacts

A multi-layer structure, thermoplastic polymer technology, applied in the direction of substructure, synthetic resin layered products, layered products, etc.

Inactive Publication Date: 2011-04-13
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application does not mention EVOH

Method used

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  • Multi-layered structure containing a barrier polymer optionally reinforced against impacts

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Experimental program
Comparison scheme
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no. 1 approach

[0131] Regarding the first embodiment of the multilayer structure, it comprises (from the inside to the outside) the following layers:

[0132] A layer C1 comprising at least one functionalized fluoropolymer optionally blended with at least one compatible fluoropolymer;

[0133] a layer C2 comprising at least one adhesive link;

[0134] a layer C3 comprising at least one polyolefin, preferably polyethylene;

[0135] · layer C4 comprising at least one adhesive link; and

[0136] a barrier layer C5 comprising at least one barrier polymer, optionally impact-modified,

[0137] Said layers are arranged against each other in the order described above.

[0138] Layer C1

[0139] The role of C1 is to chemically protect the other layers. C1 also has a blocking effect. The amount of functionalized fluoropolymer is 1% to 99% by weight (preferably 50% to 10% by weight) of compatible fluoropolymer. 90% by weight).

[0140] Layer C2

[0141] The role of C2 is to facilitate the ...

no. 2 approach

[0154]For the second embodiment of the multilayer structure, it comprises (from the inside to the outside) the following layers:

[0155] · layer C'1 comprising at least one functionalized fluoropolymer optionally blended with at least one compatible fluoropolymer;

[0156] · a barrier layer C'2 comprising at least one barrier polymer, optionally impact-modified;

[0157] A layer C'3 comprising a blend of a thermoplastic polymer, preferably polyethylene, with at least one polyolefin, said thermoplastic polymer being coated with a barrier polymer with C'2 and C'4 the functional groups present react and / or optionally react with the functional groups present on the impact modifier of the barrier polymer; and

[0158] a barrier layer C'4 comprising at least one barrier polymer, optionally impact-modified,

[0159] Said layers are arranged against each other in the order described above.

[0160] Layer C'1

[0161] The properties of layer C'1 are the same as those of C1. The...

Embodiment approach

[0165] According to a preferred embodiment of the first embodiment and its variants and a preferred embodiment of the second embodiment:

[0166] The functionalized fluoropolymer is functionalized PVDF;

[0167] - said fluoropolymer optionally blended with said functionalized fluoropolymer is PVDF;

[0168] C3 or C'3 polyolefin is polyethylene;

[0169] The C4 adhesive link is a thermoplastic polymer with an impact modification that reacts with functional groups present on the C5 barrier polymer and / or optionally with the C5 barrier polymer chemical functional groups that react with functional groups present on the agent; and

[0170] The barrier polymer of C5, C'2 and C'4 is EVOH;

[0171] • The thermoplastic polymers of C2, C3, C4 and C'3 are functionalized polyolefins.

[0172] Preferably, the functionalized fluoropolymer is PVDF to which an anhydride, preferably maleic anhydride, has been radiation grafted. The fluoropolymer extrudes very well and also has excellent a...

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Abstract

The invention relates to a multi-layered structure comprising from the inside to the outside: a layer C1 containing at least one functionalised 5 fluorinated polymer optionally mixed with at least one compatible fluorinated polymer; a layer C2 containing at least one adhesion binder; a layer C3 containing at least one polyolefine, preferably a polyethylene; a layer C4 containing at least one adhesion binder; a barrier layer C5 containing at least one barrier polymer optionally reinforced against impacts; the layers are arranged against each other in the above-mentioned order. The invention also relates to the use of this multi-layered structure for storing or transferring fuel.

Description

technical field [0001] The present invention relates to a multilayer structure comprising a layer made of a barrier polymer and a polyolefin layer, which multilayer structure may be in the form of a film, pipe, tube, container or tank. In the case of pipes, tubes, containers or tanks, it may be used to convey fluids such as fuels (eg gasoline). The barrier polymer may be an impact modified barrier polymer. [0002] technical problem to be solved [0003] Polyolefins are commonly used in the manufacture of structures such as pipes, pipes or containers, but their barrier properties, eg to fuels, are often very insufficient for many applications. This is why it is common to combine a layer of polyolefin with a layer of a barrier polymer such as EVOH. Polyolefins have a tendency to swell when they come into contact with fuel (whether in contact with the innermost layer or the outermost layer), which tends to affect the mechanical properties of the structure as well as its dimen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K15/03F16L11/04B32B1/00
CPCF16L2011/047B32B27/08Y10T428/1352Y10T428/1393Y10T428/1383Y10T428/3154
Inventor 安东尼·邦尼特奥德·拉普兰德
Owner ARKEMA FRANCE SA
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