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A kind of polyamide resin and its preparation method and application

A technology of polyamide resin and acid chloride, which is applied in the field of polyamide resin and its preparation, can solve the problems of difficulty in meeting the requirements of heat resistance, inability to heat and melt processing, difficulty in large-scale production and application, etc., and achieve high mechanical properties and dimensions Stability, easy control of the reaction process, and the effect of reducing side reactions

Active Publication Date: 2021-11-16
ZHONGLUN PLASTIC IND FUJIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, aromatic polyamide is obtained by polycondensation of diacid with aromatic ring and diamine with aromatic ring. Since the melting temperature is higher than the decomposition temperature, it cannot be heated and melted for use.
Aliphatic-aromatic polyamide is prepared by condensation polymerization of aliphatic diamine or diacid and diacid or diamine with aromatic ring. The heat resistance and mechanical properties of polyamide products have been improved, but the polymerization temperature of this product is tens of degrees or even hundreds of degrees higher than that of aliphatic polyamides, the difficulty of polymerization has increased sharply, and the requirements for polymerization equipment have doubled, making it difficult to large-scale production application
Aliphatic polyamides do not contain heat-resistant aromatic groups, the polymerization temperature is low, and the polymerization process is easy to control, but the heat resistance of the product is low, and it is difficult to meet the electronic and electrical reflow soldering (SMT) process and the heat resistance of plastic products around the automobile engine sexual demands

Method used

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  • A kind of polyamide resin and its preparation method and application
  • A kind of polyamide resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) 16.6 g of adipoyl chloride and 3.3 g of pyromellitic acid chloride were dissolved in 200 g of dichloromethane solution to obtain a transparent organic oil phase solution.

[0062] (2) Add 11.6g of hexamethylenediamine, 8.8g of sodium hydroxide, 0.5g of tetrabutylammonium bromide, and 200g of deionized water into a three-necked flask equipped with a stirring device and a thermometer, and stir to dissolve it to form a colorless and transparent alkaline aqueous solution.

[0063] (3) Stir at a rotation speed of 800 rpm, slowly (0.5 h) drop the prepared organic solution into the aqueous solution, react at 20° C. for 1.5 h, and stop the reaction.

[0064] (4) Pour 1000g of diethyl ether into the vigorously stirred reaction solution for precipitation, use a Buchner funnel to vacuum filter to remove the reaction solvent water, dichloromethane and precipitant diethyl ether, and use 1% alkaline aqueous solution and 1% dichloromethane to precipitate the precipitate respective...

Embodiment 2

[0066] (1) 12.8 g of adipoyl chloride and 8.0 g of trimellitic acid chloride were dissolved in 500 g of 1,2-dichloroethane solution to obtain a transparent organic oil phase solution.

[0067] (2) Add 11.6g of hexamethylenediamine, 23g of sodium carbonate, 5g of cetyltrimethylammonium bromide, and 100g of deionized water into a three-necked flask equipped with a stirring device and a thermometer, and stir to dissolve it to form a colorless Transparent alkaline aqueous solution.

[0068] (3) Stir at a rotation speed of 600 rpm, slowly (1 h) drop the prepared organic solution into the aqueous solution, react at 10° C. for 3 h, and stop the reaction.

[0069] (4) Pour 5000g of ethanol into the vigorously stirred reaction solution for precipitation, use a Buchner funnel to vacuum filter to remove the reaction solvent water, 1,2-dichloroethane and precipitant ethanol, and separate the precipitates with 5% alkali Wash with alkaline aqueous solution, 5% HCl aqueous solution and dist...

Embodiment 3

[0071] (1) 16.8 g of sebacoyl chloride and 10.0 g of pyromellitic acid chloride were dissolved in 350 g of chloroform solution to obtain a transparent organic oil phase solution.

[0072] (2) Add 17.2g decanediamine, 20g sodium bicarbonate, 3g phenyltrimethylammonium chloride, and 300g deionized water into a three-necked flask equipped with a stirring device and a thermometer, and stir to dissolve it to form a colorless and transparent alkaline aqueous solution.

[0073] (3) Stir at a rotation speed of 1200 rpm, slowly (0.1 h) drop the prepared organic solution into the aqueous solution, react at 30° C. for 0.5 h, and stop the reaction.

[0074] (4) Pour 2000g of ethyl acetate into the vigorously stirred reaction solution for precipitation, use the Buchner funnel to vacuum filter to remove the reaction solvent water, chloroform and precipitant ethyl acetate, and use 0.06% alkaline Wash with aqueous solution, 0.06% HCl aqueous solution and distilled aqueous solution until the ...

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Abstract

The present invention relates to a polyamide resin and its preparation method and use. The polyamide resin contains aliphatic polyamide molecular chain segments, and aromatic imide units and aromatic imide units are embedded in the aliphatic polyamide molecular chain segments. amide unit. The polyamide resin is prepared by controlling the polymerization reaction conditions and combining precipitation, washing and drying. The polymerization reaction temperature of the polyamide resin in the invention is relatively low, the reaction process is easy to control, and is suitable for large-scale production and application. The product has excellent heat resistance, which can meet the heat resistance requirements of electronic and electrical reflow soldering (SMT) process and the periphery of automobile engine for plastic products.

Description

technical field [0001] The invention relates to the field of material synthesis and preparation, in particular to a polyamide resin and its preparation method and application. Background technique [0002] Polyamide, commonly known as nylon, refers to a class of polymers containing repeated amide groups (-CONH-) on the main molecular chain. It can be obtained by ring-opening polymerization of lactams, or by polycondensation of diamines and dibasic acids. . Polyamide has good comprehensive properties, including excellent mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties, low friction coefficient, certain flame retardancy, and easy processing. Among the engineering plastics, they have the largest output, the most varieties, and the most widely used varieties, and are widely used in the fields of electronics, automobiles, home appliances, and sporting goods. [0003] There are many kinds of polyamides, which can be di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/14C08G69/28C08G69/26
CPCC08G69/265C08G69/28C08G73/14
Inventor 叶鹭斌康杰林冰城陈志强
Owner ZHONGLUN PLASTIC IND FUJIAN
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