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A kind of organic coated nano-titanium dioxide grafted SBS modified asphalt and preparation method thereof

A technology of nano-titanium dioxide and modified asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems of reduced high and low temperature performance of modified asphalt, easy to cause diseases on the road surface, poor compatibility, etc.

Active Publication Date: 2021-04-30
湖北津泰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the main chemical bonds in SBS modified asphalt are C=C bond, C-C bond and C-H bond, etc. Ultraviolet radiation will destroy most of the chemical bonds in the asphalt, resulting in a sharp decrease in the high and low temperature performance of the modified asphalt, and the road surface is prone to disease, which greatly shortens the service life of asphalt pavement
[0003] The Chinese invention patent with the publication number CN 102174269 B 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 SBS The anti-ultraviolet aging ability of modified asphalt, but because the magnesium-aluminum-based double hydroxide is an inorganic powder, on the one hand, the apparent density of the powdered magnesium-aluminum-based double hydroxide is very small. After being added to the reaction tank, Suspended on the surface of SBS modified asphalt, 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. Substances tend to settle in SBS modified asphalt, which seriously affects the UV protection effect of SBS modified asphalt

Method used

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  • A kind of organic coated nano-titanium dioxide grafted SBS modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Heat 90 parts of base asphalt to 165°C, add 3 parts of grafted SBS modifier, 1.2 parts of 4-aminobenzothiophene, 0.8 parts of diaminobenzamide, and 1 part of flavonol to the base asphalt, keeping The reaction temperature is 170°C, stirred for 0.5h to mix the raw materials evenly, and ground for 0.5h in the colloid mill. After the colloid mill is stopped, keep the reaction temperature and continue to stir for 2h to obtain the organic-coated nano-titanium dioxide grafted SBS modified asphalt .

Embodiment 2

[0031] Heat 100 parts of base asphalt to 175°C, add 5 parts of grafted SBS modifier, 1.7 parts of 4-aminobenzothiophene, 1.3 parts of diaminobenzamide, and 3 parts of soybean isoflavones to the base asphalt, Keep the reaction temperature at 190°C and stir for 0.5h to mix the raw materials evenly. Grind in the colloid mill for 1h. After stopping the colloid mill, keep the reaction temperature and continue stirring for 3h to obtain organic-coated nano-titanium dioxide grafted SBS modified asphalt. .

Embodiment 3

[0033] Heat 95 parts of base asphalt to 170°C, add 4 parts of grafted SBS modifier, 1.5 parts of 4-aminobenzothiophene, 1.5 parts of diaminobenzamide, 2 parts of 7-methoxy Base flavanol, keep the reaction temperature at 180°C, stir for 0.5h, mix the raw materials evenly, grind in the colloid mill for 0.7h, stop the colloid mill, keep the reaction temperature, continue stirring for 2.5h, and the organic coated nano Titanium dioxide grafted SBS modified asphalt.

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Abstract

The invention belongs to the technical field of modified asphalt, and specifically discloses an organic-coated nano-titanium dioxide grafted SBS modified asphalt and a preparation method thereof. The modified asphalt, in parts by weight, comprises the following components: 90-100 % of base asphalt. parts, 3-5 parts of grafted SBS modifier, 2-3 parts of stabilizer and 1-3 parts of antioxidant; the grafted SBS modifier is prepared by grafting organic-coated nano-titanium dioxide on SBS. The organic-coated nano-titanium dioxide grafted SBS modified asphalt of the invention introduces polar groups and ultraviolet shielding agent nano-silica to the SBS through the grafting reaction, which improves the anti-ultraviolet radiation performance of the SBS and the phase between the SBS and the base asphalt. It overcomes the problems of poor compatibility between inorganic UV shielding agent powder and SBS modified asphalt and easy settling during use, and the prepared modified asphalt has excellent aging resistance.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt, and in particular relates to an organic-coated nano titanium dioxide grafted SBS modified asphalt and a preparation method thereof. Background technique [0002] Asphalt pavement has the advantages of comfortable driving, low energy consumption and easy maintenance, etc., and its proportion in road construction is getting higher and higher. However, ordinary asphalt has poor high and low temperature performance, and the road paved with it is prone to defects such as ruts and potholes, and has a short service life, especially under heavy traffic conditions. To solve this problem, polymers are usually used to modify asphalt, so as to improve the road performance of asphalt mixture. Among them, styrene-butadiene-styrene triblock copolymer (SBS) is a linear or star-shaped block copolymer synthesized from styrene and butadiene, which belongs to a typical thermoplastic elastomer. . SBS can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L87/00C08L5/02C08L5/00C08K5/45C08K5/20C08K5/1545C08G83/00
CPCC08G83/001C08L95/00C08L2201/08C08L2205/03C08L87/005C08K5/45C08K5/20C08K5/1545C08L5/02C08L5/00
Inventor 宗博
Owner 湖北津泰环保科技有限公司
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