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Preparation method for multifunctional nylon stabilizer

A multi-functional, stabilizer technology, applied in the direction of organic chemistry, can solve the problems of not being able to transfer to regular production plants, and achieve economic benefits, waste water consumption and load reduction effects

Active Publication Date: 2014-02-05
SHANXI CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Therefore, this method known from the prior art cannot be transferred to regular production plants due to the described disadvantages

Method used

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  • Preparation method for multifunctional nylon stabilizer
  • Preparation method for multifunctional nylon stabilizer
  • Preparation method for multifunctional nylon stabilizer

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preparation example Construction

[0030] A kind of preparation method of nylon multifunctional stabilizer of the present invention, its reaction principle is

[0031]

Embodiment 1

[0034] Prepare 102.5g of isophthaloyl dichloride (99.0%; 0.50mol) as solid particles, 159.5g of 2,2,6,6-tetramethylpiperidin-4-ylamine (98.0%; 1.0mol), 81.6g of 50% NaOH solution (1.02 mol), 81.40 g dichloromethane.

[0035] Mix 2,2,6,6-tetramethylpiperidin-4-ylamine and chloroform in a 2-liter flask with a stirrer, dropping funnel and thermometer, and add gradually under stirring at a temperature of 20°C NaOH solution and isophthaloyl chloride, maintain described temperature and stirring condition, add time control at 50 minutes, reaction mixture is heated to reflux temperature, distillation reclaims solvent, will add the water of appropriate amount in the process of distilling solvent, It is used to disperse the product, cool to room temperature after the reflux is completed, and separate the target nylon multifunctional stabilizer product.

Embodiment 2

[0037] Prepare 100g of isophthaloyl chloride (99.0%; 0.49mol) as solid particles, 159.5g of 2,2,6,6-tetramethylpiperidin-4-ylamine (98.0%; 1.0mol), 81.6g of 50% NaOH Solution (1.02mol), 91.8g chloroform.

[0038] Mix 2,2,6,6-tetramethylpiperidin-4-ylamine and chloroform in a 2-liter flask with a stirrer, dropping funnel and thermometer, and add gradually under stirring at a temperature of 20°C NaOH solution and isophthaloyl chloride, maintaining the temperature and stirring conditions, adding time is controlled at 60 minutes, the reaction mixture is heated to the reflux temperature, the solvent is recovered by distillation, and an appropriate amount of water will be added in the process of solvent distillation. It is used to disperse the product, cool to room temperature after the reflux is completed, and separate the target nylon multifunctional stabilizer product.

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Abstract

The invention discloses a preparation method for a multifunctional nylon stabilizer which is shown as a preparation formula (I). The preparation method comprises the steps: condensing isophthaloyl dichloride and stereo-hindered amine of tetraalkylpiperidine, selecting a proper organic solvent, reacting at 20-40DEG C in a stirring condition in the presence of an NaOH solution, distilling and recovering the solvent, and separating to obtain the multifunctional nylon stabilizer compound in the formula (1). The preparation method has the beneficial effects that through using the method, the reaction yield can be increased to 94%, and the waste water consumption and load can be obviously reduced.

Description

technical field [0001] The invention relates to a preparation method of a nylon multifunctional stabilizer, which belongs to the field of preparation of nylon stabilizers. Background technique [0002] The useful life of nylon depends on the raw materials used in the production process, the additives used to stabilize the polymer against damage caused by melt processing, and environmental aging factors. A series of disadvantages to providing a stabilization system to nylon is that the maximum concentration of many additives is limited. Nylon is believed to be poor at solvating additives, especially non-polar additives having a relatively low molecular weight relative to polyamide polymers. On the other hand, manufacturers of polyamide-based molded and extruded articles strive to include additions in low concentrations for economical reasons. [0003] The polyamide stabilization system basically still uses the traditional polymer stabilization system. In fact, there are ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D211/58
CPCC07D211/58
Inventor 王克智李训刚张建军王改敬李向阳毛晨曦代燕琴王冉王凯王朋仁刘凤玉巩翼龙张惠芳
Owner SHANXI CHEM RES INST
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