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2-methylimidazole zinc salt as well as preparation method and application thereof

A technology of methyl imidazole zinc and methyl imidazole, which is applied in the field of 2-methyl imidazole zinc salt and its preparation, can solve the problems of affecting the thermal stability of PVC products, increase economic cost, use restrictions and the like, and achieve solvent recycling. , the effect of reducing coloration and reducing acidity

Inactive Publication Date: 2017-06-13
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, lead heat stabilizers and organotin heat stabilizers have good heat stability, but their use is increasingly restricted due to high price and toxicity
The commonly used calcium stearate / zinc heat stabilizer often needs to be used in combination with other auxiliary heat stabilizers such as polyols, phosphites, and β-diketones to significantly improve the heat stability of PVC, but it affects the initial stage of PVC products. Thermal stability improves economical cost at the same time

Method used

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  • 2-methylimidazole zinc salt as well as preparation method and application thereof
  • 2-methylimidazole zinc salt as well as preparation method and application thereof
  • 2-methylimidazole zinc salt as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Get 23.79g (molecular weight 297.49, 80mmol) zinc nitrate hexahydrate and 105.20g deionized water and join in the reaction vessel, 13.14g (molecular weight 82.10, 160mmol) 2-methylimidazole is completely dissolved in 164.40g (mass fraction 25-28%) ammonia water was added to the above-mentioned reactor, the temperature was raised to 20° C., centrifuged after reacting for 10 minutes, washed with deionized water until neutral, and dried overnight at 65° C. to obtain white solid 2-methylimidazole zinc salt;

[0024] (2) 9.6g of calcium stearate, 1.68g of zinc stearate and 0.72g of 2-methylimidazole zinc salt were compounded to obtain a calcium-zinc composite thermal stabilizer.

[0025] The infrared spectrogram of the 2-methylimidazole zinc salt prepared in this embodiment is shown in figure 1 . figure 1 Medium 3129 and 2972cm -1 The C–H stretching vibration absorption peaks of benzene ring and imidazole appear at 1584cm -1 C=N stretching vibration absorption peak ap...

Embodiment 2

[0027] (1) Get 23.79g (molecular weight 297.49, 80mmol) zinc nitrate hexahydrate and 121.70g deionized water and join in the reaction vessel, 13.14g (molecular weight 82.10, 160mmol) 2-methylimidazole is completely dissolved in 128.30g (mass fraction 25-28%) ammonia water was added to the above-mentioned reactor, the temperature was raised to 20° C., centrifuged after reacting for 30 minutes, washed with deionized water until neutral, and dried overnight at 65° C. to obtain white solid 2-methylimidazole zinc salt;

[0028] (2) 9.6g of calcium stearate, 0.72g of zinc stearate and 1.68g of 2-methylimidazole zinc salt were compounded to obtain a calcium-zinc composite thermal stabilizer.

Embodiment 3

[0030] (1) Get 23.79g (molecular weight 297.49, 80mmol) zinc nitrate hexahydrate and 105.20g deionized water and join in the reaction vessel, 13.14g (molecular weight 82.10, 160mmol) 2-methylimidazole is completely dissolved in 164.40g (mass fraction 25-28%) ammonia water was added to the above reactor, the temperature was raised to 20°C, centrifuged after reacting for 60 minutes, washed with deionized water until neutral, and dried overnight at 65°C to obtain white solid 2-methylimidazole zinc salt;

[0031] (2) 9.6g of calcium stearate, 1.20g of zinc stearate and 1.20g of 2-methylimidazole zinc salt were compounded to obtain a calcium-zinc composite thermal stabilizer.

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Abstract

The invention relates to 2-methylimidazole zinc salt as well as a preparation method and application thereof. The preparation method comprises the following steps: taking zinc nitrate hexahydrate and 2-methylimidazole as raw materials, and obtaining 2-methylimidazole zinc salt (ZIF-8) in presence of a catalyst; and compounding 2-methylimidazole zinc salt with calcium stearate and zinc stearate to obtain a calcium-zinc composite heat stabilizer. The prepared 2-methylimidazole zinc salt heat stabilizer has the characteristics of no toxicity, no heavy metal, large specific surface area, environmental friendliness and the like, the obtained calcium zinc composite heat stabilizer is an efficient composite heat stabilizer, has good compatibility with PVC and can be easily dispersed, and better initial and long-term thermal stabilities and transparency are given to a PVC product. The preparation method is simple and environmentally friendly in technological route, the raw material source is rich, and the price is low.

Description

technical field [0001] The invention belongs to the field of plastic additives, and in particular relates to a zinc salt of 2-methylimidazolium and its preparation method and application. Background technique [0002] There are many defect structures in the molecular structure of polyvinyl chloride (PVC), which is prone to dehydrochlorination and degradation under conditions such as heat, light, and oxygen. With the continuous deepening of the degree of degradation, the color of PVC resin continues to deepen until it is close to black, and the mechanical properties of the product are also severely damaged. Therefore, heat stabilizers need to be added to PVC products. [0003] At present, lead heat stabilizers and organotin heat stabilizers have good heat stability, but their use is increasingly restricted due to high price and toxicity. The commonly used calcium stearate / zinc heat stabilizer often needs to be used in combination with other auxiliary heat stabilizers such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/06C08K5/00C08K5/098C08L27/06
CPCC07D233/06C08K5/0091C08K5/098C08K2201/014C08L27/06
Inventor 夏建陵汪梅宋相海李梅李守海丁呈祥蒋剑春
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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