High-temperature-resistant flame-retardant nylon and preparation method thereof

A flame-retardant nylon and high-temperature-resistant technology, which is applied in the field of high-temperature-resistant flame-retardant nylon and its preparation, can solve problems such as thermal oxygen aging, and achieve the effects of good low warpage, good ductility, and excellent impact resistance

Pending Publication Date: 2020-12-25
池州九威新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many kinds of PA, mainly PA6, PA66, PA610, PA1010, PA11, etc. Among them, the commercial production and practical application of PA6 and PA66 are the most successful (about 90%), and the vertical combustion rating of PA materials reaches UL94V-2. It will be automatically extinguished when it is lowered, and it has certain flame retardant properties. However, during use, if the ambient temperature is too high, PA will undergo thermal oxygen aging, which will change the appearance and mechanical properties of nylon. With the continuous expansion of the application range, electronic The fields of electrical appliances and construction put forward higher requirements for the flame retardancy and temperature resistance of PA, and require a vertical combustion rating of UL94 V-0 and better thermal stability

Method used

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  • High-temperature-resistant flame-retardant nylon and preparation method thereof
  • High-temperature-resistant flame-retardant nylon and preparation method thereof
  • High-temperature-resistant flame-retardant nylon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of high temperature flame retardant nylon:

[0031] Specifically, 80 parts of nylon 66, 3 parts of propane trimethylol triacrylate, 4 parts of aluminum stearate, 4 parts of barium stearate, 6 parts of red phosphorus flame retardant, and 5 parts of EVA particles are mixed and put into the twin-screw. Extruder, set host temperature: 250-270°C, host speed: 300-400rpm, feed rate: 600-800rpm, extrude and granulate, put the finished pellets into an oven (100°C) and bake for 3 hours.

[0032] (2) The above-mentioned dried particles were irradiated with cobalt source gamma rays (150kgy), and then dried in an oven at 50°C.

[0033] (3) Put the irradiated high-temperature-resistant flame-retardant nylon, unirradiated nylon particles and untreated nylon particles into the muffle furnace (280°C) at the same time, observe and compare the temperature resistance conditions, and the results show that At figure 1 .

Embodiment 2

[0035] (1) Preparation of high temperature flame retardant nylon:

[0036] Specifically, 90 parts of nylon 6, 5 parts of propane trimethylol triacrylate, 6 parts of barium stearate, 2 parts of nano-zirconium phosphate, 10 parts of red phosphorus flame retardant, and 6 parts of EVA particles were mixed and put into twin-screw extrusion. Out of the machine, set the host temperature: 250-270°C, the host speed: 300-400rpm, the feeding rate: 600-800rpm, extrude and granulate, put the granules into the oven (100°C) and bake for 3 hours.

[0037] (2) The above-mentioned dried particles were irradiated with cobalt source gamma rays (150kgy), and then dried in an oven at 50°C.

[0038] (3) The above-mentioned irradiated cross-linked nylon particles, unirradiated nylon particles and untreated nylon particles were tested for melt index and injection molded into 0.7mm flame retardant samples. The flame retardant performance was tested by UL94 flame retardant standard. Properties are show...

Embodiment 3

[0040] (1) Preparation of high temperature flame retardant nylon:

[0041] Specifically, 90 parts of nylon 6, 5 parts of trimethylolpropane trimethacrylate, 4 parts of zinc calcium stabilizer, 4 parts of hydrotalcite, 10 parts of red phosphorus flame retardant, and 6 parts of EVA particles are mixed and put into Twin-screw extruder, set the host temperature: 250-270°C, host speed: 300-400rpm, feed rate: 600-800rpm, extrude and granulate, put the prepared pellets into the oven (100°C) and bake for 3 hours .

[0042] (2) The above-mentioned dried particles were irradiated with cobalt source gamma rays (150kgy), and then dried in an oven at 50°C.

[0043] (3) Inject the above-mentioned irradiated cross-linked nylon particles and unirradiated nylon particles into a 0.7mm flame retardant sample, and use the UL94 flame retardant standard to test the flame retardant properties. The flame retardant properties are shown in Table 1. The melt index Data are shown in Table 2.

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Abstract

The invention relates to high-temperature-resistant flame-retardant nylon and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the method, traditional nylon 6 or nylon 66 is modified, 1-5% of a cross-linking agent of a polyfunctional monomer, 1%-8% of a heat stabilizer, 5-25% of a flame retardant and 1-8% of EVA particles are added into a preparation formula for melt blending extrusion, then a cobalt source or an electron accelerator is used for irradiation treatment, and the irradiation dose is 10-200 kGy. Compared with the traditional nylon 6 / nylon 66, the cross-linked nylon 6 / nylon 66 prepared by the invention has the advantages that the temperature resistance and the flame retardance are improved, the flame retardance can reach the V0 level, the high temperature of 280 DEG C or above can be continuously resisted, and meanwhile, the stability and the ductility are good.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-temperature-resistant flame-retardant nylon and a preparation method thereof. Background technique [0002] Nylon (PA), obtained by polycondensation of dibasic acid and diamine or amino acid, is a general term for thermoplastic engineering plastics containing amide bonds (-NHCO-) ​​in the main chain of the molecule. It has excellent mechanical properties, heat resistance, Chemical resistance, wear resistance and self-lubrication and many other advantages. Since it was launched by DuPont in 1930, nylon has been widely used in the automotive industry, electronic appliances, synthetic fibers, construction and other fields. It is one of the engineering plastics with the largest output and the widest range of applications in the world today. [0003] There are many kinds of PA, mainly PA6, PA66, PA610, PA1010, PA11, etc. Among them, the commercial production and prac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L77/02C08L23/08C08K3/02C08K5/098C08K3/32C08K13/02C08K3/26C08L85/02C08F283/00C08F222/14C08F2/46
CPCC08L77/06C08L77/02C08F283/04C08L2201/02C08L2201/08C08L2201/14C08K2003/026C08K2201/011C08K2003/328C08L2312/06C08L2205/03C08L23/0853C08K3/02C08K5/098C08K3/32C08K13/02C08K3/26C08L85/02C08F222/103C08F2/46
Inventor 李会杨俊杰郭建军胡志强
Owner 池州九威新材料有限公司
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