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Polyamides semi-cristallins souples

A polyamide and impact modifier technology, applied in polyamide coatings, rigid containers, hoses, etc., can solve the problems of pure PA without flexibility, and achieve the effect of improving heat aging

Active Publication Date: 2012-07-18
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an unresolved issue is that these pure PAs are not sufficiently flexible

Method used

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  • Polyamides semi-cristallins souples
  • Polyamides semi-cristallins souples
  • Polyamides semi-cristallins souples

Examples

Experimental program
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preparation example Construction

[0210] For the preparation of the compositions of the invention, they can be prepared by melt blending the ingredients using standard techniques for thermoplastics.

[0211] The composition of the invention may additionally comprise at least one additive selected from the group consisting of:

[0212] dye;

[0213] pigment;

[0214] brightener;

[0215] Antioxidants;

[0216] flame retardant;

[0217] UV stabilizers;

[0218] nanofillers;

[0219] Nucleating agent.

[0220] As regards multilayer structures, the following structures may be mentioned:

[0221] Structure (a) contains:

[0222] a layer of the composition according to the invention and a further layer of polyamide, between which a coextruded link may be arranged;

[0223] Structure (b) contains:

[0224] A layer of the composition of the invention between two polyamide layers, a coextrusion linker can be arranged between two or more of these layers (for example it can be a layer of PA11 or PA12, a layer o...

Embodiment 1

[0266] Example 1: Plasticized PA-10,10 for compressed air brake applications

[0267] Composition: PA-10, 10 (86.4%) + 13% BBSA + 0.6% Polyad PB201.

[0268] Polyad PB201 represents an inorganic antioxidant based on copper iodide.

[0269] The formulation was tested and compared with the DIN 73378PHLY standard value. The modulus was evaluated for the injection molded material, and the burst strength and impact strength values ​​were evaluated for the extruded tubes with ID / OD of 6 and 8 mm. The table below shows that plasticized PA-10,10 meets this criterion for modulus after aging, burst strength and impact strength. The burst strength value at 140°C is greater than the requirement at 130°C.

[0270]

[0271] * Conditioned for 15 days at 23°C / 50%RH.

Embodiment 2

[0273] PA-6,10 and PA-6,12 for hydraulic (clutch) tube applications. The ratio of polyamide in the table below represents the balance relative to 100%. PA-11 represents catalytic PA-11 containing 600 ppm phosphoric acid.

[0274]

[0275] * After this time, the elongation of the specimen is reduced by a factor of 2 relative to the initial value (injection molded specimen)

[0276] The above table shows that PA-6,10 and PA-6,12 can be advantageously used instead of PA-12 for hydraulic applications such as for clutch fluid pipes, which require high pressure resistance. Compared with PA-6,12, PA-6,10 has advantages in thermal burst strength, impact strength and high temperature aging. Addition of PA-11 increases rigidity and life, but impairs burst strength.

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Abstract

The invention relates to the use of a composition, noted C, in a coating process for covering articles, said composition comprising, by weight, the total being 100 percent: to 50 to 100percent of at least one polyamide A1 of formula X.Y is divided by Z or 6.Y2 is divided by Z in which: X denotes the residues of an aliphatic diamine having from 6 to 10 carbon atoms, Y denotes the residues of an aliphatic dicarboxylic acid having from 10 to 14 carbon atoms , Y2 denotes the residues of an aliphatic dicarboxylic acid having from 15 to 20 carbon atoms and Z denotes at least one unit chosen from the residues of a lactam, the residues of an plus minus,e to aminocarboxylic acid, the unit X1, Y1 in which X1 denotes the residues of an aliphatic diamine and Y1 denotes the residues of an aliphatic dicarboxylic acid, the weight ratios Z is divided by (X plus Y plus Z) and Z is divided by (6plusY2plusZ) being between 0 and 15 persent; to 0 to 40 persent of a plasticizer; to 0 to 50 persent of an impact modifier; and to 0 to 50 persent of a polyamide A2. The invention also relates to coated articles covered with a layer consisting of the above composition C. This coating is useful for making devices for storing or transferring fluids, in particular in motor vehicles and heavy goods vehicles.

Description

[0001] This application is a divisional application of the Chinese invention application (name of invention: flexible semi-crystalline polyamide, filing date: October 3, 2005; application number: 200580041717.X). technical field [0002] The present invention relates to flexible semicrystalline polyamides. Through extrusion or injection molding, they can be used to produce parts resistant to fluids and solvents used in automobiles. Background technique [0003] Polyamide Nylon-12 (PA-12) is widely used in automobiles and heavy goods vehicles because of its attractive mechanical properties and its resistance to gasoline, oil and grease. Because of changes in engine development and its environment, there is now a need for thermoplastic materials that can be used at temperatures 20 to 30°C higher than the operating temperature of PA-12, while still maintaining good flexibility, impact strength, chemical resistance and good extrusion mutability (convertibility in extrusion). P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B32B27/34C08L77/06C08L77/00C08K5/435F16L11/04
CPCB32B2439/62B32B27/22B32B2597/00B32B2605/08C08L23/08B32B2270/00B32B1/02C09D177/06B32B2264/0257B32B2307/546C08G69/265C08L23/02B32B27/34B32B27/306B32B27/08C08L51/06B32B2307/558B32B2264/02C08L77/06B32B27/18B32B2307/7265C08L23/16B32B2250/24C08L77/00B32B2307/714B32B27/32C08L2205/02B32B1/00C08L2666/02C08L2666/06C08L2666/20C08L2666/24C08K5/43F16L11/04
Inventor 菲利普.布朗德尔蒂博.蒙塔纳里安尼特.莱恩曼尼古拉斯.阿穆鲁亨利.德克雷默
Owner ARKEMA FRANCE SA
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