Preparation method of MPOP

A melamine polyphosphate, melamine technology, applied in the direction of organic chemistry, can solve the problem of high energy consumption, achieve the effects of low reaction energy consumption, increase the degree of polymerization, reduce water solubility and water absorption

Inactive Publication Date: 2016-04-20
WENGFU (GRP) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction in the first stage of this method needs to be completed at a higher temperature, and the required energy consumption is high.

Method used

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  • Preparation method of MPOP
  • Preparation method of MPOP
  • Preparation method of MPOP

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 39.52g (0.25mol) of urea phosphate, place it in a 500mL three-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, add 158.08g of deionized water to the three-necked flask to dissolve urea phosphate, and the concentration of urea phosphate is 20 %, then slowly add 31.54g (0.25mol) melamine to the urea phosphate solution, stir and heat up to 80°C, control the stirring speed of the electric stirrer at 200-350 rpm, keep the temperature for 1.5 hours, and after the reaction is completed, cool and filter with suction , washed with deionized water, dried in vacuum at 70°C for 24 hours, and milled to obtain 53.30 g of an intermediate with a yield of 75.00% and a pH value of 2.45 at the end of the reaction.

Embodiment 2

[0025] Weigh 39.52g (0.25mol) of urea phosphate, place it in a 500mL three-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, add 91.21g of deionized water to the three-necked flask to dissolve urea phosphate, and the concentration of urea phosphate is 30 %, then slowly add 31.54g (0.25mol) melamine to the urea phosphate solution, stir and heat up to 80°C, control the stirring speed of the electric stirrer at 200-350 rpm, keep the temperature for 1.5 hours, and after the reaction is completed, cool and filter with suction , washed with deionized water, vacuum-dried at 70°C for 24 hours, and milled to obtain 53.45g of an intermediate with a yield of 75.22% and a pH value of 2.67 at the end of the reaction.

Embodiment 3

[0027] Weigh 39.52g (0.25mol) of urea phosphate, place it in a 500mL three-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, add 59.28g of deionized water to the three-necked flask to dissolve urea phosphate, and the concentration of urea phosphate is 40 %, then slowly add 31.54g (0.25mol) melamine to the urea phosphate solution, stir and heat up to 80°C, control the stirring speed of the electric stirrer at 200-350 rpm, keep the temperature for 1.5 hours, and after the reaction is completed, cool and filter with suction , washed with deionized water, dried in vacuum at 70°C for 24 hours, and milled to obtain 53.76g of an intermediate with a yield of 75.05% and a pH value of 2.63 at the end of the reaction.

[0028] As can be seen from examples 1-3, with the increase of urea phosphate concentration, the pH value at the end of the reaction and the intermediate yield all show a trend of rising first and then decreasing, and all reach the maxim...

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Abstract

The invention provides a preparation method of MPOP. The method comprises steps as follows: (1) preparation of an intermediate: urea phosphate is dissolved in water, the concentration of urea phosphate is controlled to range from 10% to 50%, a certain amount of melamine is added to react with urea phosphate, the molar ratio of urea phosphate to melamine is 1:(0.8-1.25), the reaction temperature is controlled within 25-100 DEG C, the reaction time is 0.5-2.5 h, filtration, washing and vacuum drying are performed, and the intermediate is obtained; (2) preparation of MPOP: the intermediate prepared in Step A is calcined at the temperature of 200-400 DEG C for 1-5 h, cooling, grinding and sieving are performed, and a flame retardant, namely, MPOP is obtained. The technology is simple, industrialization is easy to realize, the operation condition is mild, water is taken as a reaction medium, and the method is clean and pollution-free.

Description

technical field [0001] The invention relates to a preparation method of melamine polyphosphate, which belongs to the field of flame retardant preparation. Background technique [0002] Flame retardants are additives used to improve the flame resistance of materials, that is, to prevent materials from being ignited and to inhibit flame propagation. Flame retardants are mainly used for flame retardant synthetic and natural polymer materials (including plastics, rubber, fibers, wood, paper, coatings, etc.). Among the many varieties of flame retardants, halogenated flame retardants have the advantages of good flame retardant effect, less dosage, and little impact on the mechanical properties of materials. They have been used as the main flame retardant varieties for a long time, but they When the material is heated and burned, it will produce toxic and corrosive gases and a large amount of smoke, which will pollute the environment. With the enhancement of human environmental p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G79/04C07D251/54C08L85/02C08K5/3492C08L23/12
CPCC08G79/04C07D251/54C08K5/34922C08L23/12C08L2201/02C08L2201/22C08L85/02
Inventor 秦军刘飞解田欧斌陈利萍姜定田瑶珠吕晴
Owner WENGFU (GRP) CO LTD
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