High-flowability intrinsic flame-retardant long-carbon-chain nylon and preparation method thereof

A long-chain nylon and high-flow technology, applied in the field of polymer chemistry, can solve the problems of difficult control of molecular polymerization and complex molecular chain entanglement, and achieve the effects of reducing product viscosity, improving flame retardancy, and improving fluidity

Active Publication Date: 2020-10-02
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 high-flowability intrinsic flame-retardant long-carbon-chain nylon and a preparation method thereof. According to the invention, in the early-stage neutralization and salification process of long-carbon-chain nylon, monoaminosilane is introduced to replace a small part of amine raw materials, and relatively active amino groups carried in molecular chains are neutralized with binary acid, so that Si-O bonds are introduced into the molecular weight, and the flame retardant property of the material is improved while the product fluidity is improved. The method starts fromthe source, the high-flowability intrinsic flame-retardant long-carbon-chain nylon product is produced; by designing from a molecular structure, a molecular chain structure capable of improving the flowability of the product and improving the flame retardance of the product is embedded into the molecular chain structure of the long-carbon-chain nylon, so as to obtain the high-flowability intrinsicflame-retardant long-carbon-chain nylon.

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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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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