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Low-smell high-gloss free-spraying polyamide composition and preparation method thereof

A polyamide composition and a spray-free technology, which are applied in the field of low-odor and high-gloss spray-free polyamide compositions and their preparation, and can solve the problems of odor generation, deterioration of odor, etc.

Active Publication Date: 2018-02-23
SHANGHAI KINGFA SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can solve the problem of odor caused by the catalytic degradation of polyamide materials during the production, storage, transportation and use of metal impurities and other forms of catalyst impurities introduced by polyamide during processing and other production or use processes
Also solves the problem of worsening odors due to the introduction of effect pigments

Method used

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  • Low-smell high-gloss free-spraying polyamide composition and preparation method thereof
  • Low-smell high-gloss free-spraying polyamide composition and preparation method thereof
  • Low-smell high-gloss free-spraying polyamide composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Prepare raw materials according to the following components and parts by weight thereof:

[0057] PA66 83kg;

[0058] Mineral I 15kg;

[0059] Effect pigment I 2kg;

[0060] The low-odor, high-gloss spray-free polyamide composition obtained by granulating through the above-mentioned blending extrusion process is further passed through the odor removal process of the present invention, and the odor removal process includes dissolving the initially obtained low-odor spray-free polyamide composition on the in a vacuum jar and proceed as follows:

[0061] (1) Replace the air inside the tank with nitrogen gas, repeat the operation 3 times, and remove the oxygen in the air;

[0062] (2) Seal and draw a vacuum so that the internal pressure of the tank is less than or equal to 133 Pascals;

[0063] (3) Heat the low-odor, high-gloss spray-free polyamide composition inside the vacuum tank through the heating coil in the tank body, so that its temperature reaches a temperature...

Embodiment 2

[0065] Prepare raw materials according to the following components and parts by weight thereof:

[0066] PA66 82kg;

[0067] Mineral II 15kg;

[0068] Effect pigment II 3kg;

[0069] The low-odor, high-gloss spray-free polyamide composition obtained by granulating through the above-mentioned blending extrusion process is further passed through the odor removal process of the present invention, and the odor removal process includes dissolving the initially obtained low-odor spray-free polyamide composition on the in a vacuum jar and proceed as follows:

[0070] (1) Use nitrogen gas to replace the air inside the tank, repeat the operation 3 times, and remove the oxygen in the air;

[0071] (2) Seal and draw a vacuum so that the internal pressure of the tank is less than or equal to 133 Pascals;

[0072](3) Heat the low-odor, high-gloss spray-free polyamide composition inside the vacuum tank through the heating coil in the tank body, so that its temperature reaches a temperat...

Embodiment 3

[0074] Prepare raw materials according to the following components and parts by weight thereof:

[0075] PA66 74kg;

[0076] Mineral III 25kg;

[0077] Effect pigment III: 1kg;

[0078] The low-odor, high-gloss spray-free polyamide composition obtained by granulating through the above-mentioned blending extrusion process is further passed through the odor removal process of the present invention, and the odor removal process includes dissolving the initially obtained low-odor spray-free polyamide composition on the vacuum jar, and proceed as follows:

[0079] (1) Use nitrogen gas to replace the air inside the tank, repeat the operation 3 times, and remove the oxygen in the air;

[0080] (2) Seal and draw a vacuum so that the internal pressure of the tank is less than or equal to 133 Pascals;

[0081] (3) Heat the low-odor, high-gloss spray-free polyamide composition inside the vacuum tank through the heating coil in the tank body, so that its temperature reaches a temperat...

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Abstract

The invention discloses a low-smell high-gloss free-spraying polyamide composition which comprises, by weight, 30-100 parts of polyamide, 0.1-6 parts of effect pigments, 0-50 parts of mineral fillers,0-20 parts of flexibilizers, 0-5 parts of auxiliaries, 0-1 part of heat stabilizers and 0-1 part of antioxidants. Monomers and low-polymer components remaining in the production process of polyamideare eliminated by reaction in the preparation process, and the smell of a low-smell nylon composition is improved. Besides, surface defects of free-spraying workpieces are decreased, brightness is improved, the free-spraying workpieces are closer to appearance effects of painted parts, the smell of the nylon composition is further removed by a smell removal process, and glossiness and tensile strength are further improved by introducing the mineral fillers and the flexibilizers.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a low-odor, high-gloss spray-free polyamide composition and a preparation method thereof. Background technique [0002] The coating of plastic surfaces is very decorative, but at the same time it inevitably causes chemical pollution and increases the cost of the system. As a result, there is a need for the development of spray-free plastics. Competitive spray-free plastics need to have the following characteristics: low system cost, can be injection molded; easy to process and shape, uniform surface effect; excellent appearance effects, such as gloss, metallic effect, piano black, etc.; scratch resistance, wear resistance , stains, fingerprints, etc.; resistance to chemical agents such as detergents; weather resistance; can replace metal parts, etc. [0003] As the regulations issued by the national government have increasingly stringent environmental protection requirements fo...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L23/06C08K3/22C08K9/10C08K7/00C08K3/08C08K3/34C08L77/02C08K3/18
CPCC08K3/08C08K3/34C08K3/346C08K7/00C08K2003/0812C08K2003/085C08K2003/2227C08K2201/003C08L77/02C08L77/06C08L2201/08C08L23/06C08K3/22C08K9/10C08L63/00C08K3/18
Inventor 林洁龙丁正亚杨军杨波苏娟霞黄河生
Owner SHANGHAI KINGFA SCI & TECH
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