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Halogenless fire retarded polymer modified asphalt and preparation process thereof

A technology of flame-retardant polymers and modified asphalt, which is applied to building structures, building components, building insulation materials, etc., and can solve the problems of increasing the generation of corrosive gases in fires, threatening life, and increasing the difficulty of rescue personnel's work, etc. problems, to achieve the effects of reducing the impact on human health and the environment, cost-effective, and excellent physical properties

Inactive Publication Date: 2006-11-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because halogen flame retardants mainly react to generate hydrogen halides or metal halides to play a flame-retardant role, these compounds also increase the generation of toxic, shading and corrosive gases in fires, which pose a threat to people's lives. Significant threat that makes life difficult for first responders

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 4.0 parts (mass parts, the same below) of SBS to 87 parts of molten Taizhou No. 90 road asphalt (softening point 46 ° C, penetration 88 dmm), maintain the temperature at 185 ° C, and at a shear rate of 5000 rpm , and high-speed stirring for 2 hours to make it blend uniformly to obtain SBS modified asphalt. Then add 5 parts of tricresyl phosphate and 4 parts of melamine into the molten SBS modified asphalt, and continue to stir for 0.5 hours to make it blend uniformly to obtain the halogen-free flame-retardant SBS modified asphalt. According to the performance test, the limiting oxygen index (LOI) of flame-retardant SBS modified asphalt is 23.8%, the softening point is 70°C, and the ductility at 5°C is 41cm.

Embodiment 2

[0025] Add 4 parts (mass parts, the same below) of SBR to 88 parts of molten SK-70 road asphalt (softening point 46 ° C, penetration 71 dmm), maintain the temperature at 170 ° C, and at a shear rate of 3000 rpm , and high-speed stirring for 2 hours to make it blend uniformly to obtain SBR modified asphalt. Add 2 parts of triethyl phosphate, 3 parts of polyphosphate amine and 3 parts of melamine into the molten SBR modified asphalt, and continue to stir for 1 hour to make it blend evenly to obtain the halogen-free flame-retardant SBR modified asphalt. According to the performance test, the LOI of flame-retardant SBR modified asphalt is 23.4%, the softening point is 65°C, and the ductility at 5°C is 39cm.

Embodiment 3

[0027] Add 3.5 parts (mass parts, the same below) of SBS to 89.5 parts of molten Taizhou No. 70 road asphalt (softening point 47 ° C, penetration 76 dmm), maintain the temperature at 180 ° C, and at a shear rate of 4000 rpm , and high-speed stirring for 3 hours to make it blend uniformly and obtain SBS modified asphalt. Add 2 parts of tricresyl phosphate, 1 part of polyphosphate amine, 1 part of triethyl phosphate, 2 parts of melamine and 1 part of melamine cyanurate into the molten SBS modified asphalt, and continue to stir for 1 hour to make it total Mix evenly to obtain a halogen-free flame-retardant SBS modified asphalt product. According to the performance test, the LOI of flame-retardant SBS modified asphalt is 23.6%, the softening point is 67°C, and the ductility at 5°C is 33cm.

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Abstract

This invention relates to a type of halogen-free flame retardant polymeric compound and modified asphalt, and the method. The feature is it composed by 5-15portions halogen-free flame retardant agent, 2-7portions polymeric compound and 78-93portions asphalt stock, accounting weight. The method of halogen-free flame retardant polymeric compound and modified asphalt includes steps as follow: first add polymeric compound into fusing asphalt, keep 150-200deg.C, mix for 2-4hours at 1000-6000rpm; then add halogen-free composite flame retardant to fusing polymeric compound modified asphalt, keep the same rotation speed 0.5-1hour. This invention has good physical property and good flame retardant property, and no deleterious gas such as halogen hydride when burning.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant polymer modified asphalt and a preparation method thereof. Background technique [0002] In recent years, my country's expressways have developed rapidly, especially in the western region, where there are many mountains and mountains, and a large number of highway tunnel projects are under construction or to be constructed. Due to the development of highway tunnels in the direction of growing, and the increase of driving speed and density, the risk of tunnel fire accidents caused by various reasons such as vehicle breakdowns and mutual collisions, spontaneous combustion of goods, etc. in the tunnels is on the rise. For a long time, pavement materials in highway tunnels have been mainly limited to cement concrete, because cement concrete is not prone to structural damage under humid conditions in the tunnel, the construction is simple, and the durability of the pavement is relatively good. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K5/521C08L9/06C08L53/02
Inventor 余剑英吴少鹏罗小锋丛培良曾旋
Owner WUHAN UNIV OF TECH
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