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Composite flame retardant, flame-retardant asphalt and preparation method of flame-retardant asphalt

A technology of compounding flame retardant and asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems of affecting the dispersion and uniformity of montmorillonite, poor compatibility of montmorillonite, and affecting the flame retardant effect, etc. Achieve excellent high temperature stability and low temperature cracking resistance, good thermal oxidation resistance and photooxidative aging resistance, and the effect of reducing the filling amount

Active Publication Date: 2017-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high viscosity of asphalt, its rheological properties are poor, making it poorly compatible with montmorillonite, affecting the dispersion and uniformity of montmorillonite, and affecting the flame retardant effect

Method used

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  • Composite flame retardant, flame-retardant asphalt and preparation method of flame-retardant asphalt

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of composite flame retardant:

[0040]Among them, the weight content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10 μm. Polyphosphoric acid has a degree of polymerization of 100.

[0041] (1) Under the condition of high-speed stirring (1000-1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution (mass concentration: 8%), keep stirring for 20 minutes, and filter to obtain a filter cake.

[0042] (2) Add paraformaldehyde (polymerization degree 30) into ethanol, then adjust the pH value to 8.0 with sodium hydroxide solution, raise the temperature to 70°C, depolymerize and dissolve paraformaldehyde in ethanol, and continue the reaction 80min; then add melamine and dicyandiamide, and react at a temperature of 75°C. After the melamine and dicyandiamide dissolve, continue the reaction for 30min to obtain a melamine-dicyandiamide formaldehyde resin prepolymer with a mass concentration of 65%. weak.

[0...

Embodiment 2

[0054] Preparation of composite flame retardant:

[0055] Among them, the weight content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10 μm. Polyphosphoric acid has a degree of polymerization of 100.

[0056] (1) Under the condition of high-speed stirring (1000-1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution (mass concentration: 10%), keep stirring for 20 minutes, and filter to obtain a filter cake.

[0057] (2) Add paraformaldehyde (polymerization degree 50) into ethanol, then adjust the pH value to 9.0 with sodium hydroxide solution, raise the temperature to 70°C, depolymerize and dissolve paraformaldehyde in ethanol, and continue the reaction 60min; then add melamine and dicyandiamide, and react at a temperature of 80°C. After the melamine and dicyandiamide dissolve, continue the reaction for 70min to obtain a melamine-dicyandiamide formaldehyde resin prepolymer with a mass concentration of 75%. weak.

...

Embodiment 3

[0069] Preparation of composite flame retardant:

[0070] Among them, the weight content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10 μm. Polyphosphoric acid has a degree of polymerization of 100.

[0071] (1) Under the condition of high-speed stirring (1000-1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution (mass concentration: 12%), keep stirring for 25 minutes, and filter to obtain a filter cake.

[0072] (2) Add paraformaldehyde (polymerization degree 10) into ethanol, then adjust the pH value to 8.0 with sodium hydroxide solution, raise the temperature to 75°C, depolymerize and dissolve paraformaldehyde in ethanol, and continue the reaction Then add melamine and dicyandiamide, and react at a temperature of 78°C. After the melamine and dicyandiamide dissolve, continue the reaction for 20 minutes to obtain a melamine-dicyandiamide formaldehyde resin prepolymer with a mass concentration of 75%. weak.

[0...

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Abstract

The invention discloses a composite flame retardant, flame-retardant asphalt and a preparation method of the flame-retardant asphalt. The composite flame retardant comprises montmorillonite and melamine-dicyandiamide formaldehyde resin polyphosphate, wherein the melamine-dicyandiamide formaldehyde resin polyphosphate coats on the surface of the montmorillonite and is inserted between layers of the montmorillonite. According to the composite flame retardant, the dispersibility and the homogeneity of montmorillonite particles in asphalt can be improved, the filling amount of the flame retardant is reduced, and the properties, such as the water resistance, the anti-crack property, the rut resistance, the low temperature resistance, the thermo-oxidative aging resistance and the photo-oxidative aging resistance are improved at the same time.

Description

technical field [0001] The invention relates to a modified asphalt and a preparation method thereof, in particular to a composite flame retardant, a flame-retardant asphalt and a preparation method thereof. Background technique [0002] Pitch is an organic polymer compound composed of carbon and hydrogen as the main elements, which is flammable. The burning process of asphalt first melts, drips, and flows, followed by the burning of molten beads, and then the burning molten beads sprinkle and flow, causing the fire to spread and expand. The combustion of asphalt is a chemical process of exothermic and decomposition. Hydrogen, methane, benzene and alkane flammable gases are decomposed during combustion. The combustion of these gases can further accelerate the thermal decomposition of asphalt, especially in tunnels. Fire, the fire spreads quickly, the scope is wide, and the loss is large. With the continuous emergence of highway tunnels and the increase of tunnel traffic vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/34C08K3/32C08L95/00
CPCC08K3/32C08K3/346C08K9/10C08K2003/321C08K2201/003C08L2201/02C08L2201/08C08L95/00
Inventor 宣根海宁爱民徐青柏陈杰李志军
Owner CHINA PETROLEUM & CHEM CORP
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