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Preparation method for melamine cyanurate and application thereof

A technology of melamine cyanurate and melamine, applied in the field of polymer chemistry, can solve the problems of high production cost, limited application, low production efficiency, etc., and achieve the effect of reducing the viscosity of the system and increasing the solid content

Inactive Publication Date: 2018-01-12
JINAN TAIXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production efficiency of this method is low, and the general solid content is only about 9% to 12%.
Because the reaction requires a large amount of water, the utilization rate of the reaction equipment is low, and the production efficiency is low, resulting in high production costs of the process
[0005] At present, the decomposition temperature of MCA products at home and abroad is 300-320°C. For foreign manufacturers of MCA products such as BASF, the decomposition temperature of their MCA products is about 330°C. They are used in some plastics with extremely high processing temperatures, such as nylon (PA46). limit

Method used

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  • Preparation method for melamine cyanurate and application thereof
  • Preparation method for melamine cyanurate and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 solid content 20%

[0026] Add 36L of water and 9g of sustained-release agent into a 50L reactor, stir at 60°C for 10min, add 4.6kg of cyanuric acid (purity 99.5%), add 4.4kg of melamine (purity 99.8%) after heating up to 90°C, and continue to heat up to 95°C , insulation reaction 1h. The slurry was filtered to separate the material and the liquid, the reaction mother liquor was transported to the reactor for reuse, the filter cake was sent to the drier for drying and crushing, and 8.9 kg of melamine cyanurate product with a purity of 99.7% was obtained, and the decomposition temperature was 356.3°C.

[0027] figure 1 Shown is the SEM collection of illustrative plates of the melamine cyanurate prepared by the present embodiment, by figure 1 It can be seen that the obtained product is in the form of flaky crystals.

[0028] figure 2 Shown is the TGA collection of illustrative plates of the melamine cyanurate prepared by the present embodiment, by figu...

Embodiment 2

[0029] Embodiment 2 solid content 20%

[0030] Add 36L of water and 45g of sustained-release agent into a 50L reactor, stir at 70°C for 10min, add 4.6kg of cyanuric acid (purity 99.5%), add 4.4kg of melamine (purity 99.8%) after heating up to 90°C, and continue to heat up to 98°C , heat preservation reaction 48min. The slurry is filtered to separate the material and liquid, the reaction mother liquor is transported to the reactor for reuse, and the filter cake is sent to a drier for drying and crushing to obtain 8.7 kg of melamine cyanurate product with a purity of 99.5%, which is shown by a scanning electron microscope image. The melamine cyanurate prepared in this example is in the form of flaky crystals; the TGA diagram shows that the decomposition temperature is 350.6°C.

Embodiment 3

[0031] Embodiment 3 solid content 20%

[0032] Add 36L of water and 62g of sustained-release agent into a 50L reactor, stir at 75°C for 10min, add 4.6kg of cyanuric acid (purity 99.5%), add 4.4kg of melamine (purity 99.8%) after heating up to 90°C, and continue to heat up to 96°C , heat preservation reaction 52min. The slurry is filtered to separate the material and liquid, the reaction mother liquor is transported to the reactor for reuse, and the filter cake is sent to a drier for drying and crushing to obtain 8.8 kg of melamine cyanurate product with a purity of 99.6%, which is shown by a scanning electron microscope image. The melamine cyanurate prepared in this example is in the form of flaky crystals; the TGA diagram shows that the decomposition temperature is 352.2°C.

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Abstract

The invention discloses a preparation method for melamine cyanurate and application thereof. The preparation method comprises the following steps: by taking cyanuric acid, melamine and water as raw materials, adding few slow releasing agent for restraining the longitudinal growth of melamine cyanurate; increasing solid-liquid rate of melamine cyanurate in the compounding process by reducing the system viscosity. The acquired product is in slice crystal form; the decomposing temperature reaches up to 350 DEG C; the melamine cyanurate completely can be used for processing the engineering plastics such as PA, PC and PET with higher temperature.

Description

technical field [0001] The invention relates to a method for efficiently producing high-temperature-resistant melamine cyanurate and its application in engineering plastic processing, belonging to the field of polymer chemistry. Background technique [0002] Melamine cyanurate (MCA) is a typical nitrogen-based halogen-free flame retardant, which is widely used in the halogen-free flame retardant of polyamide, rubber, polyurethane, acrylic emulsion, epoxy resin and other polymer materials. In addition, MCA also has a layered structure similar to graphite, which makes it have excellent lubricating properties. Therefore, MCA can also be used as a lubricating oil additive for mechanical lubrication in various working conditions, especially for Lubrication of food industry machinery that requires high cleanliness and no oil. [0003] At present, the methods for preparing MCA in industry mainly include urea method and cyanuric acid method. The urea method uses urea and melamine ...

Claims

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Application Information

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IPC IPC(8): C07D251/56C07D251/32C08K7/00C08L77/06
Inventor 肖学文孙晓丽姜艳岭徐亮韩军索伟侯进京白振华
Owner JINAN TAIXING FINE CHEM
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