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A kind of high fluidity bulk flame retardant long carbon chain nylon and preparation method thereof

A long-chain nylon, high-flow technology, applied in the field of polymer chemistry, can solve the problems of difficult to control molecular polymerization, complex molecular chain entanglement, etc., to improve fluidity and flame retardancy, reduce product viscosity and improve flame retardant performance. Effect

Active Publication Date: 2022-04-08
SHANDONG DONGCHEN ENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own long molecular chain structure, molecular polymerization is difficult to control under high temperature and high pressure conditions, most of which are random polymerization, most of the molecular structure is network, the molecular chain is complicated, and the fine structure is rarely studied. Different performance requirements, such as high fluidity, high viscosity, flame retardant, etc., can only be explored by production experience or later modification research to meet market demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First add 50 parts of distilled water to the salt making kettle, then add 34 parts of decanediamine and 50 parts of dodecanoic acid into the kettle, stir well and add 11 parts of r-aminopropyltriethoxysilane, heat up and stir to 100°C, stop heating, and continue stirring until the fully neutralized salt solution is clear and transparent. Add the salt solution obtained above into the polymerization kettle, add 0.1 part of phosphorous acid at the same time, start stirring after turning on the vacuum, and raise the temperature to 245°C to carry out the melt copolymerization reaction. When the pressure reaches 1.5MPa, maintain the pressure reaction for 5 hours, and then maintain The temperature is exhausted to normal pressure, the die head is heated to about 255°C, and the strip is discharged and pelletized to obtain a high-flow body flame-retardant long carbon chain nylon 1012 resin.

[0023] The production process of traditional nylon 1012 resin: first add 50 parts of dis...

Embodiment 2

[0029] First add 50 parts of distilled water to the salt making kettle, then add 29 parts of hexamethylenediamine and 45 parts of sebacic acid into the kettle, and add 10.5 parts of N-aminoethyl-3-aminopropylmethyl after fully stirring For dimethoxysilane, raise the temperature and stir to 105°C, stop heating, and continue stirring until the completely neutralized salt solution is clear and transparent. Add the salt solution obtained above into the polymerization kettle, add 0.1 part of phosphorous acid at the same time, start stirring after turning on the vacuum, and raise the temperature to 245°C to carry out the melt copolymerization reaction. When the pressure reaches 1.5MPa, maintain the pressure reaction for 4 hours, and then maintain The temperature is exhausted to normal pressure, the die head is heated to about 255°C, and the strip is discharged and pelletized to obtain a high-flow body flame-retardant long carbon chain nylon 610 resin.

[0030] Utilize the traditiona...

Embodiment 3

[0036] First add 50 parts of distilled water to the salt-making kettle, then add 23 parts of hexamethylenediamine and 40 parts of dodecanoic acid into the kettle, add 8 parts of aminopropylmethyldimethylsilane after fully stirring, heat up and stir until 100°C, stop heating and continue stirring until the fully neutralized salt solution is clear and transparent. Add the salt solution obtained above into the polymerization kettle, add 0.1 part of phosphorous acid at the same time, start stirring after turning on the vacuum, and raise the temperature to 240°C for melt copolymerization reaction. When the pressure reaches 1.5MPa, maintain the pressure reaction for 3 hours, and then maintain The temperature is exhausted to normal pressure, the die head is heated to about 255°C, and the strip is discharged and pelletized to obtain a high-flow body flame-retardant long carbon chain nylon 612 resin.

[0037]Preparation of Nylon 612 resin by traditional process: first add 50 parts of d...

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PUM

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Abstract

The invention discloses a high-flow body flame-retardant long-carbon-chain nylon and a preparation method thereof. In the process of neutralization and salt-forming of the long-carbon-chain nylon in the early stage, a small part of amine raw materials is replaced by introducing monoaminosilane. The relatively active amino group in the molecular chain is neutralized with the dibasic acid, thereby introducing Si‑O bonds into the molecular weight, improving the fluidity of the product and improving the flame retardant performance of the material itself. The present invention starts from the source to produce long carbon chain nylon resin with high fluidity and body flame retardancy. Using the principle of molecular assembly design, it is designed from the molecular structure and embedded in the molecular chain structure of long carbon chain nylon. Improving the flow energy of the product can also improve the molecular chain structure of its own flame retardant performance, so as to obtain a high flow bulk flame retardant long carbon chain nylon product.

Description

technical field [0001] The invention relates to a high-flow bulk flame-retardant long-carbon-chain nylon and a preparation method thereof, belonging to the field of polymer chemistry. Background technique [0002] Long carbon chain nylon is a kind of special nylon in high-performance engineering plastics. Due to its long molecular chain structure, it has low water absorption, high toughness, dimensional stability, wear resistance, low temperature impact resistance, etc. Can be widely used in machinery, automobiles, wire and cable, aviation, electronic appliances, information, textiles and other fields. However, due to its own long molecular chain structure, molecular polymerization is difficult to control under high temperature and high pressure conditions, most of which are random polymerization, most of the molecular structure is network, the molecular chain is complicated, and the fine structure is rarely studied. Different performance requirements, such as high fluidity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/42
CPCC08G69/42
Inventor 毕燕李树新王朝进田国锋王为国张晓康
Owner SHANDONG DONGCHEN ENG PLASTIC
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