Low-melting-point anti-dripping nylon 6 resin and preparation method thereof

An anti-droplet, low-melting-point technology, applied in the field of copolymerized low-melting-point nylon 6 resin, can solve problems such as scarcity of research work, uneven dispersion, migration of functional components, etc., and achieve expanded application range, fast burning speed, and heat release Falling effect

Pending Publication Date: 2021-10-15
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that in the field of anti-dripping modification of nylon 6, the main work is still concentrated on the modification of traditional nylon 6, and the research work on the low melting point and anti-dripping properties of nylon 6 is very rare.
In addition, functional components are mostly introduced into the matrix material in the form of blending, and in order to obtain better functional effects, the amount of functional components added is relatively large, facing potential defects such as functional component migration and uneven dispersion , will inevitably have a certain degree of impact on the comprehensive performance of nylon 6 materials

Method used

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  • Low-melting-point anti-dripping nylon 6 resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (a) Preparation of functional segments containing unsaturated double bonds

[0029] In parts by weight, take respectively 20g of 4-nitrobenzoic acid (4-NA) and 50g of sodium hydroxide (NaOH), which are dropped into 250mL of deionized water and stirred evenly, then heated in a water bath until fully dissolved; Subsequently, a certain amount of D-(+) glucose aqueous solution (100g / 150mL) was slowly added dropwise to obtain a brownish-black solution, and after 3 hours, it was filtered to obtain a bright brown precipitate; finally, the obtained precipitate was redissolved in deionized Aqueous solution, and add 25g of acetic acid for acidification, after the reaction is complete, after filtration, washing, precipitation and drying, a functional chain segment containing unsaturated double bonds is obtained, and its structural formula is:

[0030]

[0031] (b) Preparation of nylon 6 segments containing dicarboxylic groups

[0032] In parts by weight, the caprolactam of 200...

Embodiment 2

[0037] (a) Preparation of functional segments containing unsaturated double bonds

[0038] In parts by weight, take respectively 15g of 4-nitrobenzoic acid (4-NA) and 50g of sodium hydroxide (NaOH), which are dropped into 225mL of deionized water and stirred evenly, then heated in a water bath until fully dissolved; Subsequently, a certain amount of D-(+) glucose aqueous solution (100g / 150mL) was slowly added dropwise to obtain a brownish-black solution, and after 3 hours, it was filtered to obtain a bright brown precipitate; finally, the obtained precipitate was redissolved in deionized Aqueous solution, and add 25g of acetic acid for acidification, after the reaction is complete, obtain a functional segment containing unsaturated double bonds after filtration, washing, precipitation, and drying, and its structural formula is the same as that of Example 1.

[0039] (b) Preparation of nylon 6 segments containing dicarboxylic groups

[0040]In parts by weight, 200g of caprolac...

Embodiment 3

[0045] (a) Preparation of functional segments containing unsaturated double bonds

[0046] In parts by weight, take respectively 20g of 4-nitrobenzoic acid (4-NA) and 70g of sodium hydroxide (NaOH), which are dropped into 225mL of deionized water and stirred evenly, and heated in a water bath until fully dissolved; Subsequently, a certain amount of D-(+) glucose aqueous solution (100g / 150mL) was slowly added dropwise to obtain a brownish-black solution, and after 5 hours, it was filtered to obtain a bright brown precipitate; finally, the obtained precipitate was redissolved in deionized aqueous solution, and 35g of acetic acid was added for acidification, and after the reaction was complete, a functional segment containing an unsaturated double bond was obtained after filtration, washing, precipitation, and drying, and its structural formula was the same as in Example 1.

[0047] (b) Preparation of nylon 6 segments containing dicarboxylic groups

[0048] In parts by weight, t...

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Abstract

The invention relates to a low-melting-point anti-dripping nylon 6 resin and a preparation method thereof. The nylon 6 resin is formed by copolymerization of a nylon 6 chain segment containing dicarboxyl groups and a functional chain segment containing unsaturated double bonds under the action of a linker. The preparation method comprises the following steps: firstly, preparing a functional chain segment containing unsaturated double bonds by taking nitrobenzaldehyde as a raw material under the action of sodium hydroxide and G-glucose; then, according to a 'two-step bulk polymerization' preparation method, firstly, placing caprolactam in a high-temperature and high-pressure environment to be subjected to hydrolysis, ring opening and end capping, and preparing a dicarboxyl-terminated nylon 6 chain segment; then under the action of a diol linker, through esterification reaction, linking a nylon 6 chain segment with a functional chain segment containing unsaturated double bonds, and finally obtaining the low-melting-point nylon 6 resin with excellent molten drop resistance.

Description

technical field [0001] The invention belongs to the field of functional nylon 6 resin and its preparation, and in particular relates to a copolymerized low-melting nylon 6 resin with excellent droplet resistance. Background technique [0002] Nylon 6 is a "universal" polymer material with a wide range of applications and a large market share. However, in the face of the rapid modernization process, traditional nylon 6 materials have long been unable to meet the growing social needs. Therefore, the functionalization and differentiation of nylon 6 materials have already become one of the key research directions at home and abroad. Among them, the development of low melting point nylon 6 materials can greatly make up for the application needs of traditional nylon 6 in some special fields, and further expand the market application scope of nylon 6. However, due to the structural characteristics of the nylon 6 material, the nylon 6 material is extremely flammable after being he...

Claims

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Application Information

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IPC IPC(8): C08G77/30C08G77/26C08G77/06C08L77/02C08L83/08C08G69/44
CPCC08G77/30C08G77/26C08G77/06C08L77/02C08G69/44C08L2201/02C08L83/08
Inventor 范硕张红霞洪兴华
Owner ZHEJIANG SCI-TECH UNIV
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