Yellowing-resistant nylon composite material and preparation method thereof

A nylon composite material and yellowing resistance technology, applied in the field of polymer material processing, can solve problems such as yellowing effect, and achieve the effects of reducing thermal decomposition, avoiding corrosion, and reducing gas content

Active Publication Date: 2021-02-05
ZHONGLUN PLASTIC IND FUJIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to overcome the deficiencies of the prior art, provide a kind of anti-yellowing nylon composite material and its preparation method, solve the problem of the yellowing effect in the above-mentioned background technology

Method used

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  • Yellowing-resistant nylon composite material and preparation method thereof
  • Yellowing-resistant nylon composite material and preparation method thereof
  • Yellowing-resistant nylon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In Example 1, 4 parts of organic solvent N-methylpyrrolidone were added, blended with other raw materials in a high-speed mixer, and 2 parts of blocking agent m-toluene isocyanate were added. The blocking agent was added quantitatively through the liquid feeding port using a peristaltic pump. Into the blending system, blending and extruding through a twin-screw extruder to obtain the product.

[0052] The resulting product was tested for amino terminal content, carboxyl terminal content, monomer and oligomer content, and yellowing resistance, and the results are listed in Table 1 below.

[0053] Table 1 Comparative Example 1~3 and embodiment 1 formula and performance test table

[0054]

[0055]

[0056] After comparing the formulations and performance test tables of the above-mentioned comparative examples 1 to 3 and embodiment 1, it can be known that the organic solvent is added to the blend system in comparative example 2, and the monomer and oligomer content o...

Embodiment 2～7

[0058] The formula and performance table of embodiment 2~7 are listed in following table 2, and production process is basically the same as embodiment 1, just changed the kind and the consumption of nylon resin, the kind and consumption of organic solvent, the kind and consumption of end-capping agent, Examples 6 and 7 also added fillers and reinforcing fibers. For fillers, they are blended with resin and additives in a high mixer and extruded through a twin-screw extruder. For reinforcing fibers, they can be fed from the side feeding screw Blending and extruding in an extruder. The processing temperature should be adjusted appropriately due to the different types of nylon resins. The general rule is that for non-fiber-added products, the processing temperature is about 5°C higher than the melting point, and for fiber-added products, the processing temperature is about 15°C higher than the melting point.

[0059] Table 2 Embodiment 2~7 formula and performance test table

[00...

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Abstract

The invention discloses a yellowing-resistant nylon composite material and a preparation method thereof. During preparation, 20-98 parts of dry nylon resin, 0.2-10 parts of an organic solvent, 0-40 parts of a filler, 0.05-0.4 part of an antioxidant and 0.1-0.8 part of a lubricant are added by a main feeder, and the organic solvent reduces the viscosity of a blending system; 0-60 parts of reinforced fiber and 0.02-10 parts of an end capping agent are added by a side feeder, and the organic solvent is favorable for the uniform dispersion and the activity capability of the end capping agent in the system, so that the end capping rate of the end group of the nylon molecular chain is increased, and the amino and carboxyl at the tail end of the nylon molecular chain in the blending system are greatly reduced; in the process of vaporizing and discharging the added organic solvent, oxygen, monomers and oligomers in the blending system are taken away, so that the materials are prevented from being oxidized, decomposed and yellowed due to long-time contact with oxygen in the high-temperature melting and blending processes, and the product with yellowing resistance, heat resistance and thermal stability obviously improved is obtained.

Description

technical field [0001] The invention belongs to the technical field of polymer material processing, and in particular relates to a yellowing-resistant nylon composite material and a preparation method thereof. Background technique [0002] Polyamide, commonly known as nylon, the English name is Polyamide, which is a general term for polymers containing amide groups in the repeating unit of the main chain of the macromolecule. Polyamide can be obtained by ring-opening polymerization of lactam, or by polycondensation of diamine and dibasic acid. Originally used as a raw material for making fibers, later due to its good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties, and low friction coefficient, it has certain flame retardancy. It is easy to process, suitable for filling with glass fiber and other fillers, which greatly improves the performance of the resin itself, and is widely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L83/04C08K5/29C08K5/20C08K5/526C08K5/098C08K5/00C08K5/527C08K3/16C08K13/02B29B9/06
CPCC08K5/29C08K5/20C08K5/526C08K5/098C08K5/00C08K13/04C08K7/14C08L77/06B29B9/06C08L2201/08C08L83/04C08K5/527C08K3/16C08K13/02
Inventor 严海南康杰郭建南杨剑停高向东丘国智
Owner ZHONGLUN PLASTIC IND FUJIAN
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