Halogen-free nitrogen-phosphorus complex intumescent flame retardant and preparation method thereof

An intumescent flame retardant, nitrogen and phosphorus compounding technology, applied in the field of flame retardants, can solve problems such as a large number of toxic and harmful substances, life-threatening, and achieve cost reduction, high carbon residue rate, and good chemical stability. Effect

Inactive Publication Date: 2017-07-11
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these synthetic polymer materials are extremely flammable, and a large amount of toxic and harmful substances are generated during combustion, which seriously threatens people's life safety.

Method used

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  • Halogen-free nitrogen-phosphorus complex intumescent flame retardant and preparation method thereof
  • Halogen-free nitrogen-phosphorus complex intumescent flame retardant and preparation method thereof
  • Halogen-free nitrogen-phosphorus complex intumescent flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of halogen-free nitrogen-phosphorus composite expansion type flame retardant, it is made by the raw material of following weight (kg): ammonium polyphosphate 40, melamine 25, polypentylthritol 15, urate 7, aluminum hydroxide 5. Zinc borate 0.4, Ionic surfactant 2.

[0023] The preparation method of the described halogen-free nitrogen and phosphorus composite intumescent flame retardant comprises the following steps:

[0024] According to the proportion, the raw materials ammonium polyphosphate, melamine, polypentyl glycolate, and urate are added to the reactor, and the temperature of the reactor is controlled by controlling the speed of the mixer in the reactor to increase slowly at 10°C / min, and keep at 100°C for 15 minutes, and pass Slowly add inorganic additives and zinc borate from the feeding port, slowly add ionic surfactant after 10 minutes, stop the reaction and discharge in 10 minutes.

[0025] Taking this example as the raw material to prepare the copo...

Embodiment 2

[0028] A kind of halogen-free nitrogen-phosphorus composite intumescent flame retardant, it is made by the raw material of following weight (kg):

[0029] Ammonium polyphosphate 45, melamine 15, polypentylthritol 12, urate 10, aluminum hydroxide 5, zinc borate 0.2, ionic surfactant 0.5.

[0030] The preparation method of the described halogen-free nitrogen and phosphorus composite intumescent flame retardant comprises the following steps:

[0031] According to the proportion, the raw materials ammonium polyphosphate, melamine, polypentyl glycolate, and urate are added to the reactor, and the temperature of the reactor is controlled by controlling the speed of the mixer in the reactor to increase slowly at 10°C / min, and keep at 100°C for 15 minutes, and pass Slowly add inorganic additives and zinc borate from the feeding port, slowly add ionic surfactant after 8 minutes, stop the reaction and discharge in 10 minutes.

[0032] Quality Index:

[0033]

[0034]

[0035] Pr...

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Abstract

The invention discloses a halogen-free nitrogen-phosphorus complex intumescent flame retardant and a preparation method thereof. The complex flame retardant contains nitrogen and phosphorus as main components. Through the specific formula and production processes, the flame retardant has outstanding flame retardant effects, is white (crystalline or amorphous) powder, is a mixture, produces good flame retardant effects on PP through P-N synergistic effects, has good fire resistance, high thermal stability, a decomposition temperature greater than 280 DEG C, high residual carbon content, small hygroscopicity, excellent dispersibility and good chemical stability, can be mixed with other substances and does not easily a chemical change.

Description

technical field [0001] The invention relates to the field of flame retardants, in particular to a halogen-free nitrogen-phosphorus compound intumescent flame retardant and a preparation method thereof. Background technique [0002] Polymer materials are widely used in various fields of national economy and people's life because of their excellent performance and low price. In 2000, the production volume of plastic alone reached 170 million tons, and its volume was much larger than that of steel produced in the same year. However, most polymers are flammable and combustible materials. When burning, the heat release rate is high, the calorific value is high, the flame spreads fast, and it is not easy to extinguish. Sometimes it also produces thick smoke and toxic gases, causing harm to the environment and people. For example, fires have occurred frequently in recent years, and accidents of serious fire injuries have often occurred, especially several fires in public places hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08K3/32C08K5/3492C08K5/053C08K3/22C08K3/38C08L23/14
CPCC08K13/02C08K3/22C08K3/32C08K3/38C08K5/053C08K5/34922C08K5/34924C08K2003/2227C08K2003/323C08K2003/387C08L23/14
Inventor 吴晓静刘阿钻李醒醒李志
Owner HEFEI UNIV OF TECH
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