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Anti-yellowing polyamide composition and preparation method of anti-yellowing polyamide

A polyamide composition and a technology for yellowing resistance, applied in the field of polymer materials, can solve the problems of reduced mechanical properties of polymer materials, unsatisfactory long-term light aging resistance, etc. yellowing effect

Inactive Publication Date: 2016-07-27
CATHAY R&D CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the ideal ultraviolet absorbers (such as light stabilizers) are mostly compound ultraviolet absorbers, such as salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines and UV absorbers compounded by hindered amines, but these UV absorbers will reduce the mechanical properties of polymer materials, and the long-term light aging resistance is not ideal
[0006] At present, there is no report on the anti-yellowing method of polyamide 56 that makes polyamide 56 (PA56) have better yellowing resistance and does not affect other properties of itself.

Method used

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  • Anti-yellowing polyamide composition and preparation method of anti-yellowing polyamide
  • Anti-yellowing polyamide composition and preparation method of anti-yellowing polyamide

Examples

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preparation example Construction

[0042]

[0043] The preparation method of the anti-yellowing polyamide comprises the steps of: melting and mixing the components of the above-mentioned anti-yellowing polyamide composition to obtain the anti-yellowing polyamide; the components of the anti-yellowing polyamide composition include polyamide 56 and anti-yellowing polyamide Aging agent, anti-aging agent includes heat stabilizer, light stabilizer and amino functional group blocking agent.

[0044] The method of above-mentioned melt mixing can be one-time adding method, also can be batch-wise adding method.

[0045] The one-time addition method refers to adding polyamide 56 (as a polymer component), a heat stabilizer (as a non-polymer component), a light stabilizer (as a non-polymer component) and an amino functional group capping agent (as a non-polymer component) ) etc. are all added to a melt mixer, single-screw extruder, twin-screw extruder, agitator, single-screw kneader, twin-screw kneader or Banbury mixer at...

Embodiment 1-4 and comparative example 1

[0063] The ingredients and contents of the compositions in Examples 1-4 and Comparative Example 1 are shown in Table 1.

[0064] Composition and content thereof in Table 1 embodiment 1-4 and comparative example 1

[0065]

[0066] The preparation method of the anti-yellowing polyamide in embodiment 1 to 4 and comparative example 1 is as follows:

[0067] According to the ratio shown in Table 1, polyamide 56 is supplied from the top feed port to the SK40mm twin-screw extruder manufactured by Keya. The operating temperature is about 280°C, the melting temperature is 290°C, and the screw speed is about 300rpm. Production The capacity is 40kg / h, and then according to the ratio shown in Table 1, add anti-aging agent from the side feed port, cool the melted kneaded product extruded from the die outlet in the form of strands, and pelletize to obtain polyamide Composition granules. The polyamide 56 and the anti-aging agent can be added at one time or in batches.

[0068] The pre...

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Abstract

The invention provides an anti-yellowing polyamide composition and a preparation method of anti-yellowing polyamide; the yellowing polyamide composition includes polyamide 56 and anti-aging agents, wherein the anti-aging agents include a heat stabilizer, a light stabilizer and an amino functional group end-capping agent. The preparation method of the anti-yellowing polyamide comprises that the components of the anti-yellowing polyamide composition are subjected to melt mixing, and thus the anti-yellowing polyamide is obtained. The anti-yellowing polyamide not only has durable anti-yellowing property, but also has excellent mechanical properties and processability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a polyamide composition and a preparation method of the polyamide. Background technique [0002] Due to the improvement of environmental protection awareness, in recent years, people have continuously developed environmentally friendly polymers synthesized from bio-based raw materials, such as polyamide 6 (PA6) and polyamide 66 (PA66). These materials have high mechanical strength, heat resistance, Self-lubricating properties, excellent barrier properties and chemical corrosion resistance, etc., have excellent comprehensive properties and broad application prospects. Generally, they can be used in various fields such as machinery manufacturing, electronic appliances, and transportation. However, these bio-based polymers also have certain defects, which are manifested in their unstable properties under special external conditions, such as possible degradation, loss of mechanical pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K13/06C08K9/10C08K3/22C08K5/092C08K5/3435C08K5/20
Inventor 胡定军郑毅秦兵兵刘驰
Owner CATHAY R&D CENT CO LTD
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