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Anti-aging high-viscosity modified asphalt additive and preparation method thereof

A modified asphalt, anti-aging technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of unfavorable asphalt uniform dispersion, poor polymer compatibility, insufficient anti-aging performance, etc. , to achieve the effect of improving poor anti-aging properties, increasing anti-aging properties and increasing viscosity

Active Publication Date: 2021-05-04
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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  • 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 parts by weight of sodium dodecyl sulfonate, and 1 part by weight of gelatin are added to 50 parts by weight of an aqueous solution, and sheared for 1 hour at a speed of 3000 rpm. Prepare a stabilizer suspension.

[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 tetraethyl orthosilicate was added dropwise, stirred and reacted at 50° C. and 300 rpm for 2 hours, cooled, filtered, washed with deionized water, and dried at 50° C. for 3 hours to obtain a stabilizer and its coating.

[0043] (3) Add 10 parts by weight of stabilizer and its coating, and 0.8 parts by weight of phenyltrimethoxysilane to 100 parts by weight of toluene, perform surface modification reaction at 60°C for 1 hour, filter after cooling, wash with ethanol, 50 Dry at ℃ for 3 hours to obtain the surface-modified s...

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 are added to 50 parts by weight of an aqueous solution, and sheared for 1 hour at a speed of 4000 rpm. Prepare a stabilizer suspension.

[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 tetraethyl orthosilicate was added dropwise, stirred and reacted at 55° C. and 350 rpm for 3 hours, cooled, filtered, washed with deionized water, and dried at 50° C. for 3 hours to obtain a stabilizer and its coating.

[0048] (3) Add 10 parts by weight of stabilizer and its coating, and 1 part by weight of phenyltriethoxysilane to 200 parts by weight of toluene, perform surface modification reaction at 70°C for 1 hour, filter after cooling, and wash with ethanol. Dry at 50°C for 4 hours to obtain the surface-modified s...

Embodiment 3

[0051] (1) Add 6 parts by weight of sulfur, 2 parts by weight of methyl ethylene disulfide, 0.08 parts by weight of sodium dodecylsulfonate, and 1 part by weight of gelatin into 50 parts by weight of an aqueous solution, and cut for 1 hour at a speed of 5000 rpm to prepare a 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 tetraethyl orthosilicate was added dropwise, stirred and reacted at 60° C. and 350 rpm for 3 hours, cooled, filtered, washed with deionized water, and dried at 60° C. for 5 hours to obtain a stabilizer and its coating.

[0053] (3) Add 10 parts by weight of stabilizer and its coating, and 1 part by weight of phenyldichlorosilane to 300 parts by weight of toluene, perform surface modification reaction at 75°C for 2 hours, filter after cooling, wash with ethanol, and wash at 60°C Drying for 5 hours under the hood to obtai...

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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 a stabilizer and a coating thereof, and 1-4 parts of an anti-aging agent. Wherein the stabilizer and the coating thereof are granular, the particle diameter is 100-150 microns, and the thickness of the particle wall material of the coating is 3-6 microns. The coating is surface modified silicon dioxide. The high-viscosity modified asphalt additive can significantly improve the viscosity of asphalt, is convenient to use, has good anti-aging performance, and the high-viscosity modified asphalt additive and asphalt have 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 greater than 20,000 Pa·s at 60°C, which is suitable for the application of open-graded anti-skid wear layer (OGFC) and other road surfaces. OGFC pavement has good drainage, noise reduction and anti-skid performance due to its large void ratio. However, the structural characteristics of large voids also lead to an increase in the contact area between asphalt and 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 per...

Claims

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Application Information

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Patent Type & Authority Applications(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