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A magnesium-aluminum-based layered double hydroxide/SBS composite modifier, modified asphalt and preparation method thereof

A technology of double hydroxide and compound modifier, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of low apparent density, influence on UV protection, and difficulty in uniform dispersion, so as to avoid Degradation effect, improve anti-ultraviolet aging ability, good effect of ultraviolet protection

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

AI Technical Summary

Problems solved by technology

Patent CN 102174269 A discloses a magnesium-aluminum-based layered double hydroxide anti-aging SBS modified asphalt. The magnesium-aluminum-based layered double hydroxide has excellent shielding effect on ultraviolet rays and can improve the UV resistance of SBS modified asphalt Aging ability, but because the magnesium-aluminum-based layered double hydroxide is an inorganic powder, on the one hand, the powdered magnesium-aluminum-based double hydroxide has a very small apparent density. After being added to the reaction tank, it is suspended in the SBS modified asphalt On the surface, it is difficult to form a uniform dispersion with SBS modified asphalt. On the other hand, the compatibility between inorganic magnesium-aluminum-based double hydroxide and SBS-modified asphalt is poor, and the magnesium-aluminum-based double hydroxide in SBS modified asphalt Subsidence easily occurs in the medium, which seriously affects the UV protection effect of magnesium-aluminum-based layered double hydroxide on SBS modified asphalt

Method used

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  • A magnesium-aluminum-based layered double hydroxide/SBS composite modifier, modified asphalt and preparation method thereof
  • A magnesium-aluminum-based layered double hydroxide/SBS composite modifier, modified asphalt and preparation method thereof
  • A magnesium-aluminum-based layered double hydroxide/SBS composite modifier, modified asphalt and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 59 parts (parts by mass, the same below) SBS, 30 parts of surface organically modified magnesium-aluminum-based layered double hydroxide, 0.2 parts of tetrasulfide bis(1,5-pentylene) thiuram and 10.8 parts of minus third-line oil Place in a high-speed mixer at 95℃ for blending for 15 minutes, then add the blend to a single-screw extruder for extruding and granulation. The die temperature is 170℃ to obtain magnesium-aluminum-based layered double hydroxide. / SBS compound modifier.

[0030] Heat 93.43 parts of road petroleum asphalt (with a penetration of 93dmm at 25°C and a softening point of 45.1°C) to 175°C, add it to a reaction tank with agitator and asphalt colloid mill, turn on the agitator, and add 6.5 parts while stirring The magnesium-aluminum-based layered double hydroxide / SBS composite modifier prepared above and 0.07 parts of sulfur, keep the reaction temperature at 175℃±5℃, stir for 5 minutes to make the magnesium-aluminum-based layered double hydroxide / SBS compo...

Embodiment 2

[0036] 53 parts of SBS, 32 parts of surface organically modified magnesium-aluminum-based layered double hydroxide, 0.4 parts of tetramethylthiuram disulfide and 14.6 parts of minus third line oil were blended in a high-speed mixer at a temperature of 95℃ for 15 minutes , And then add the blend into a single-screw extruder for extruding and granulation, and the temperature of the die is about 170°C to obtain the magnesium-aluminum-based layered double hydroxide / SBS composite modifier.

[0037] Heat 92 parts of road petroleum asphalt (with a penetration of 73dmm at 25°C and a softening point of 47.3°C) to 175°C, add it to a reaction tank with agitator and asphalt colloid mill, turn on the agitator, and add 7.9 parts while stirring The magnesium-aluminum-based layered double hydroxide / SBS composite modifier prepared above and 0.1 part of sulfur, keep the reaction temperature at 175℃±5℃, stir for 5 minutes to make the magnesium-aluminum-based layered double hydroxide / SBS composite mo...

Embodiment 3

[0043] Put 51 parts of SBS, 35 parts of surface organically modified magnesium-aluminum-based layered double hydroxide, 0.3 parts of bis(1,5-pentylidene) thiuram tetrasulfide and 13.7 parts of minus third line oil at a temperature of 95℃ Blend in a high-speed mixer for 15 minutes, and then add the blend to a single-screw extruder for extruding and granulation. The temperature of the die is about 170°C to obtain the magnesium-aluminum-based layered double hydroxide / SBS composite modifier .

[0044] Heat 90.9 parts of road petroleum asphalt (with a penetration of 81dmm at 25°C and a softening point of 46.6°C) to 175°C, add it to a reaction tank with agitator and asphalt colloid mill, turn on the agitator, and add 8.98 parts while stirring The magnesium-aluminum-based layered double hydroxide / SBS composite modifier prepared above and 0.12 parts of sulfur, keep the reaction temperature at 175℃±5℃, stir for 5 minutes to make the magnesium-aluminum-based layered double hydroxide / SBS co...

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Abstract

The invention relates to magnalium-based layered double-hydroxide / SBS composite modifier, modified asphalt and a preparation method of the magnalium-based layered double-hydroxide / SBS composite modifier. The composite modifier is prepared by mixing SBS, surface organic modified magnalium-based layered double-hydroxide, an accelerant and a compatilizer at high speed, extruding and pelleting. The ultraviolet aging-resisting SBS modified asphalt is prepared by melting and commixing asphalt, the magnalium-based layered double-hydroxide / SBS composite modifier and a stabilizer. The magnalium-based layered double-hydroxide / SBS composite modifier is prepared by compounding and reacting the magnalium-based layered double-hydroxide, SBS, the accelerant and the compatilizer, the ultraviolet aging resistance of SBS and asphalt can be remarkably improved after the composite modifier is added into asphalt, long-term stable dispersion of SBS and magnalium-based layered double-hydroxide in asphalt is achieved, and the prepared SBS modified asphalt is excellent in ultraviolet aging resistance.

Description

Technical field [0001] The invention relates to a magnesium-aluminum-based layered double hydroxide / SBS composite modifier, modified asphalt and a preparation method thereof. Background technique [0002] Asphalt pavement is widely used because of its smooth surface, comfortable driving, anti-skid, and convenient maintenance. The pavement paved with ordinary asphalt is prone to rutting in the hot summer and cracking in the cold winter, which is difficult to meet the performance requirements of modern traffic for asphalt pavement. To solve this problem, polymers are usually used to modify the asphalt to improve the road performance of the asphalt mixture. Among them, styrene-butadiene-styrene triblock copolymer (SBS) can simultaneously improve the high temperature of asphalt With low temperature performance, it has become the most widely used asphalt modifier in the world. However, the asphalt pavement will age due to factors such as light, heat and oxygen during use. Among them...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/02C08K9/06C08K3/22C08L95/00C08K13/06C08K5/40C08K5/01C08K3/06
Inventor 余剑英章灿林徐松吴伟飞吴红高丽周吉彭超范霆孙育斌
Owner WUHAN UNIV OF TECH
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