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A kind of anti-aging high-viscosity modified asphalt additive and preparation method thereof

A technology of modified asphalt and anti-aging agent, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., and can solve unfavorable asphalt uniform dispersion, poor polymer compatibility, insufficient anti-aging performance, etc. Problems, achieve the effects of improving poor aging resistance, increasing anti-aging performance, and increasing viscosity

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-viscosity asphalt modifier has a wide range of sources and a simple production process, but there is a problem of premature crosslinking of thermoplastic elastomers, which is not conducive to its uniform dispersion in asphalt
[0007] In summary, although the existing technology can improve the viscosity and adhesion of asphalt to a certain extent, there are problems such as inconvenient use, premature crosslinking of polymers, poor compatibility of polymers, and insufficient anti-aging performance.

Method used

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  • A kind of anti-aging high-viscosity modified asphalt additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041](1) 2.5 parts by weight of sulfur, 2.5 parts by weight of diaryl disulfide, 0.05 part by weight of sodium dodecyl sulfonate, and 1 part by weight of gelatin were added to 50 parts by weight of aqueous solution, and sheared for 1 hour at 3000 rpm. A stabilizer suspension is prepared.

[0042] (2) Add dilute hydrochloric acid to the stabilizer suspension to maintain the concentration of hydrochloric acid at 0.09 mol / L. Then, 15 parts by weight of ethyl orthosilicate was added dropwise, and the reaction was stirred at 50 °C and 300 rpm for 2 h. After cooling, it was filtered, washed with deionized water, and dried at 50 °C for 3 h to obtain the stabilizer and its coating.

[0043] (3) 10 parts by weight of stabilizer and its coating, 0.8 parts by weight of phenyltrimethoxysilane were added to 100 parts by weight of toluene, and the surface modification reaction was carried out at 60 ° C for 1 h, after cooling, filtered, washed with ethanol, and 50 Dry at ℃ for 3h to obtain...

Embodiment 2

[0046] (1) 3 parts by weight of sulfur, 2 parts by weight of dimethyl disulfide, 0.05 parts by weight of sodium dodecyl sulfonate, and 3 parts by weight of gelatin were added to 50 parts by weight of aqueous solution, and sheared for 1 hour at 4000 rpm. A stabilizer suspension is prepared.

[0047] (2) Add dilute hydrochloric acid to the stabilizer suspension to maintain the concentration of hydrochloric acid at 0.09 mol / L. Then, 24 parts by weight of ethyl orthosilicate was added dropwise, and the reaction was stirred at 55 °C and 350 rpm for 3 h. After cooling, it was filtered, washed with deionized water, and dried at 50 °C for 3 h to obtain the stabilizer and its coating.

[0048] (3) 10 parts by weight of stabilizer and its coating, 1 part by weight of phenyltriethoxysilane were added to 200 parts by weight of toluene, and the surface modification reaction was carried out at 70 ° C for 1 h, after cooling, filtered and washed with ethanol, After drying at 50°C for 4 hours...

Embodiment 3

[0051] (1) 6 parts by weight of sulfur, 2 parts by weight of methyl ethylene disulfide, 0.08 parts by weight of sodium dodecyl sulfonate, and 1 part by weight of gelatin were added to 50 parts by weight of aqueous solution, and sheared at 5000 rpm for 1 hour, and the preparation was stable. agent suspension.

[0052] (2) Add dilute hydrochloric acid to the stabilizer suspension to maintain the concentration of hydrochloric acid at 0.10 mol / L. Then, 32 parts by weight of ethyl orthosilicate was added dropwise, and the reaction was stirred at 60 °C and 350 rpm for 3 h. After cooling, it was filtered, washed with deionized water, and dried at 60 °C for 5 h to obtain the stabilizer and its coating.

[0053] (3) 10 parts by weight of stabilizer and its coating, and 1 part by weight of phenyldichlorosilane were added to 300 parts by weight of toluene, and the surface modification reaction was carried out at 75 °C for 2 hours. After cooling, filtered and washed with ethanol at 60 °C....

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Abstract

The invention discloses an anti-aging high-viscosity modified asphalt additive and a preparation method thereof. The additive comprises the following raw material components in parts by weight: 100 parts of SBS, 20-40 parts of petroleum resin, 10-40 parts of aromatic oil, 5-8 parts of stabilizer and its coating, and 1-4 parts of anti-aging agent. Wherein, the stabilizer and its coating are granular, the particle diameter is 100-150 microns, and the thickness of the coating particle wall material is 3-6 microns. The coating is surface-modified silica. The high-viscosity modified asphalt additive of the invention can significantly increase the viscosity of the asphalt, is convenient to use, and has good anti-aging performance, and the additive has very good compatibility and uniform dispersibility with the asphalt.

Description

technical field [0001] The invention relates to a high-viscosity modified asphalt additive and a preparation method thereof, in particular to a high-viscosity modified asphalt additive with anti-aging performance and a preparation method thereof. Background technique [0002] High-viscosity asphalt generally refers to asphalt with a dynamic viscosity of more than 20,000 Pa·s at 60°C, which is suitable for applications such as open-graded anti-skid wear layers (OGFC). Due to its large void ratio, OGFC pavement has good drainage, noise reduction, and anti-skid properties. However, the structural characteristics of large porosity also lead to an increase in the contact area of ​​asphalt with air and ultraviolet light, which accelerates the aging of asphalt and shortens the service life of the pavement. [0003] At present, high-viscosity asphalt is mainly prepared by adding polymers to asphalt, which can significantly improve the high and low temperature properties of asphalt ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L57/02C08L91/00C08K9/10C08K9/06C08K3/36C08K3/06C08K5/375C08K13/06
CPCC08L95/00C08L2201/08C08L2205/035C08L53/02C08L57/02C08L91/00C08K9/10C08K9/06C08K3/36C08K3/06C08K5/375C08K13/06Y02W30/91
Inventor 宋乐春陈保莲范思远陈杰李臣泽李志军宁爱民程国香
Owner CHINA PETROLEUM & CHEM CORP