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

A technology of modified asphalt and additives, used in building components, building insulation materials, buildings, etc., can solve the problems of poor asphalt compatibility, poor polymer compatibility, insufficient anti-aging performance, etc. Effects of aging performance, increased viscosity, improved rutting resistance and low temperature performance

Active Publication Date: 2020-01-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the waste tire rubber powder used in it still has the problem of poor compatibility with asphalt, and also has the problem of insufficient anti-aging performance.
[0006] In summary, although the existing technology can improve the viscosity and adhesion of asphalt to a certain extent, there are problems of poor polymer compatibility and insufficient anti-aging performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 10 parts by weight of MCM-41 mesoporous molecular sieve (with a specific surface area of ​​1000 m 2 / g), 0.4 parts by weight of disodium tetrasulfide were added to 100 parts by weight of toluene. Heating to 50°C, adding 0.5 parts by weight of γ-chloropropyltrimethoxysilane dropwise, raising the temperature to 70°C for 2 hours, cooling, filtering, washing with ethanol, and drying at 100°C for 2 hours to obtain a surface-modified mesoporous molecular sieve.

[0039] (2) 100 parts by weight of SBS (molecular weight: 100,000), 40 parts by weight of C5 petroleum resin (softening point: 95°C), 20 parts by weight of aromatic oil (content of aromatic hydrocarbon: 40wt%), 4 parts by weight of surface modification agent Molecular sieves and 2 parts by weight of 2,6-di-tert-butyl-p-cresol are uniformly mixed, blended and extruded by a twin-screw extruder, and granulated to obtain an anti-aging high-viscosity modified asphalt additive. The operating conditions of the extruder ...

Embodiment 2

[0041] (1) 10 parts by weight of MCM-48 mesoporous molecular sieve (with a specific surface area of ​​800 m 2 / g), 0.6 parts by weight of disodium tetrasulfide were added to 150 parts by weight of xylene. Heating to 55°C, adding 0.8 parts by weight of γ-chloropropyltriethoxysilane dropwise, raising the temperature to 75°C for 2 hours, cooling, filtering, washing with ethanol, and drying at 100°C for 3 hours to obtain a surface-modified mesoporous molecular sieve.

[0042](2) 100 parts by weight of SBS (molecular weight: 150,000), 30 parts by weight of C5 petroleum resin (softening point: 100°C), 30 parts by weight of aromatic oil (60 wt% aromatic content), 5 parts by weight of surface modification agent Molecular sieves, 3 parts by weight of 4,4'-thiobis(6-tert-butyl-3-methylphenol) are evenly mixed, then blended and extruded by a twin-screw extruder, and granulated to obtain anti-aging high-viscosity Modified bitumen additive. The operating conditions of the extruder are: 1...

Embodiment 3

[0044] (1) 10 parts by weight of SBA-15 mesoporous molecular sieve (with a specific surface area of ​​1100 m 2 / g), 0.7 parts by weight of disodium tetrasulfide were added to 150 parts by weight of toluene. Heating to 60°C, adding 1.0 parts by weight of chloromethyltriethoxysilane dropwise, raising the temperature to 75°C for 3 hours, cooling, filtering, washing with ethanol, and drying at 100°C for 5 hours to obtain a surface-modified mesoporous molecular sieve.

[0045] (2) 100 parts by weight of SBS (molecular weight is 200,000), 20 parts by weight of C5 petroleum resin (softening point is 110°C), 40 parts by weight of aromatic oil (content of aromatic hydrocarbon is 80wt%), 6 parts by weight of surface modification agent Molecular sieves and 4 parts by weight of β-(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate are mixed evenly, then blended and extruded by a twin-screw extruder, and granulated to obtain anti- Aged high viscosity modified bitumen additive. The op...

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Abstract

The invention discloses an anti-aging high-viscosity modified asphalt additive and a preparation method thereof, wherein the additive comprises the following raw material components by weight: 100 parts of SBS, 20-40 parts of a petroleum resin, 10-40 parts of aromatic hydrocarbon oil, 2-8 parts of a surface modified mesoporous molecular sieve, and 1-4 parts of an antioxidant, wherein the surface modified mesoporous molecular sieve is a mesoporous molecular sieve modified with chlorosilane and disodium tetrasulfide. According to the present invention, with the high-viscosity modified asphalt additive, the viscosity and the adhesion of the asphalt can be significantly improved, the good aging resistance can be achieved, and the additive has good compatibility 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 Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L57/02C08L91/00C08K9/06C08K9/02C08K7/26
CPCC08K2201/011C08L53/02C08L95/00C08L2205/03C08L2205/035C08L57/02C08L91/00C08K9/06C08K9/02C08K7/26
Inventor 张静宋乐春陈保莲范思远程国香宁爱民李志军
Owner CHINA PETROLEUM & CHEM CORP
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