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Flame-retardant rigid polyurethane foaming plastic composite material and preparation method thereof

A technology of rigid polyurethane and foam plastics, which is applied in the field of manufacturing modified rigid polyurethane foam plastics, can solve the problems of not meeting the processing and molding requirements of polymer materials, low thermal decomposition temperature, and easy explosion of dust, and achieve obvious synergistic resistance Combustion effect, good thermal stability, non-corrosion effect on processing equipment

Inactive Publication Date: 2012-11-14
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main varieties of inorganic flame retardants are aluminum hydroxide, magnesium hydroxide, inorganic phosphorus, etc., and the thermal decomposition temperature of aluminum hydroxide is lower than that of magnesium hydroxide, so it cannot be processed at a higher temperature, and cannot meet the processing requirements of polymer materials. Requirements: In practical applications, inorganic phosphorus is easy to absorb moisture, oxidize, and release highly toxic gases, dust is easy to explode, and its use is greatly limited

Method used

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  • Flame-retardant rigid polyurethane foaming plastic composite material and preparation method thereof
  • Flame-retardant rigid polyurethane foaming plastic composite material and preparation method thereof
  • Flame-retardant rigid polyurethane foaming plastic composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0046] A flame-retardant rigid polyurethane foam composite material, the raw materials are by weight: 27 parts of modified nano-magnesium hydroxide, 13 parts of microencapsulated red phosphorus, 30 parts of polypropylene oxide, and polyphenyl polymethine 30 parts of base polyisocyanate, 5 parts of blowing agent dichlorofluoroethane, 0.5 part of dibutyltin dilaurate.

[0047] The polypropylene oxide is trifunctional polypropylene oxide with a molecular weight of 600.

[0048] The modified nano-magnesium hydroxide is prepared by wet-modifying nano-magnesium hydroxide with a particle size of 100 nm through a silane coupling agent KH-550.

[0049]The preparation method of the flame-retardant rigid polyurethane foam plastic composite material includes the following steps: weighing the above-mentioned raw materials in parts by weight, controlling the constant temperature of the raw materials at 25°C, and mixing modified nano-magnesium hydroxide, microencapsulated red phosphorus, dic...

Embodiment 2

[0051] A flame-retardant rigid polyurethane foam composite material, the raw materials are by weight: 40 parts of modified nano-magnesium hydroxide, 10 parts of microencapsulated red phosphorus, 40 parts of polypropylene oxide, 40 parts of toluene diisocyanate, Foaming agent dichloromethane 10 parts, dibutyltin dilaurate 1 part.

[0052] The polypropylene oxide is hexafunctional polypropylene oxide with a molecular weight of 2000.

[0053] The modified nano-magnesium hydroxide is prepared by wet-modifying nano-magnesium hydroxide with a particle size of 60 nm through a silane coupling agent KH-550.

[0054] The preparation method of the flame-retardant rigid polyurethane foam composite material comprises the following steps: weighing the above-mentioned raw materials in parts by weight, controlling the constant temperature of the raw materials at 25°C, and mixing modified nano-magnesium hydroxide, microencapsulated red phosphorus, and dichloromethane 1. Pour dibutyltin dilaur...

Embodiment 3

[0056] A flame-retardant rigid polyurethane foam composite material, the raw materials are by weight: 32 parts of modified nano-magnesium hydroxide, 13 parts of microencapsulated red phosphorus, 50 parts of polypropylene oxide, diphenylmethane diisocyanate 45 parts, 15 parts of foaming agent dichloromethane, 2 parts of dibutyltin dilaurate.

[0057] The polypropylene oxide is tetrafunctional polypropylene oxide with a molecular weight of 800.

[0058] The modified nano-magnesium hydroxide is prepared by wet-modifying nano-magnesium hydroxide with a particle size of 40nm through a silane coupling agent KH-550.

[0059] The preparation method of the flame-retardant rigid polyurethane foam composite material comprises the following steps: weighing the above-mentioned raw materials in parts by weight, controlling the constant temperature of the raw materials at 25°C, and mixing modified nano-magnesium hydroxide, microencapsulated red phosphorus, and dichloromethane 1. Pour dibuty...

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Abstract

The invention relates to a flame-retardant rigid polyurethane foaming plastic composite material and a preparation method thereof. The flame-retardant rigid polyurethane foaming plastic composite material is prepared from the following raw materials in parts by weight: 27-40 parts of modified nanometer magnesium hydrate, 10-13 parts of microencapsulation red phosphorus, 30-50 parts of polypropylene oxide, 30-45 parts of isocyanate, 5-15 parts of foaming agent and 0.5-2 parts of dibutyltin dilaurate. Through synergism of the inorganic particle nanometer magnesium hydrate and the microencapsulation red phosphorus, the flame resistance of the composite material is improved, the oxygen index of the composite material is improved to 31%, the horizontal firing level of the composite material reaches HB40, and the vertical firing level of the composite material reaches V-0.

Description

technical field [0001] The invention relates to a flame-retardant rigid polyurethane foam composite material and a preparation method thereof, and belongs to the technical field of manufacturing methods of modified rigid polyurethane foam. Background technique [0002] The biggest advantages of rigid polyurethane foam are light weight, good heat insulation, sound absorption and shock resistance, high compression strength and good dimensional stability, so it is widely used in national defense, construction and transportation. Departments. With the gradual expansion of the application range of rigid polyurethane foam, people have gradually realized that it is extremely important to increase the flame retardancy of rigid polyurethane foam. [0003] There are four specific methods for the flame retardancy of rigid polyurethane foam: (1) reactive flame retardant, introducing elements with flame retardancy into the foam raw materials, such as phosphorus, halogen, etc., which wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08K9/06C08K3/22C08K9/10C08K3/02C08J9/04C08G18/48C08G101/00
Inventor 刘生鹏许莉莉金晶樊庆春张良均
Owner WUHAN INSTITUTE OF TECHNOLOGY
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