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

An asphalt additive and anti-aging technology, applied in building components, building insulation materials, construction, etc., can solve the problems of poor compatibility of asphalt, insufficient anti-aging performance, poor compatibility of polymers, etc., and achieve improved anti-aging Effect of aging performance, improvement of anti-oxidation efficiency, improvement of viscosity and adhesion

Inactive Publication Date: 2018-08-14
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, it has the problems of poor polymer compatibility and insufficient anti-aging performance.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Mix 1 part by weight of MCM-41 mesoporous molecular sieve (with a specific surface area of ​​1000 m 2 / g), 3-aminopropyltrimethoxysilane accounting for 15wt% of MCM-41 mesoporous molecular sieve and γ-mercaptopropyltrimethoxysilane accounting for 4wt% of MCM-41 mesoporous molecular sieve were added to 20 parts by weight of toluene . Keep the temperature at 110°C, keep stirring, heat and reflux for 3 hours, filter after cooling, wash with a large amount of ethanol, and dry at 100°C for 5 hours to obtain a mesoporous molecular sieve grafted with aminosilane and mercaptosilane.

[0054] (2) Under nitrogen protection, add 1 part by weight of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)acrylic acid and 1.4 parts by weight of thionyl chloride into 30 parts by weight of chloroform, at 50°C Heating and reacting for 8 hours, and distilling under reduced pressure to obtain 3-(3,5-di-tert-butyl-4-hydroxyphenyl)acryloyl chloride.

[0055] (3) Add 1 part by weight of mesoporous molec...

Embodiment 2

[0058] (1) 1 part by weight of SBA-15 mesoporous molecular sieve (with a specific surface area of ​​1100 m 2 / g), 3-aminopropyltriethoxysilane accounting for 10wt% of SBA-15 mesoporous molecular sieve and γ-mercaptopropyltriethoxysilane accounting for 6wt% of SBA-15 mesoporous molecular sieve were added to 20 parts by weight in toluene. Keep the temperature at 110°C, keep stirring, heat and reflux for 3 hours, filter after cooling, wash with a large amount of ethanol, and dry at 100°C for 5 hours to obtain a mesoporous molecular sieve grafted with aminosilane and mercaptosilane.

[0059] (2) Under nitrogen protection, add 1 part by weight of 3,5-di-tert-butyl-4-hydroxybenzoic acid and 1.3 parts by weight of thionyl chloride into 25 parts by weight of chloroform, heat at 50°C for 8 hours, and reduce Pressure distillation to obtain 3,5-di-tert-butyl-4-hydroxybenzoyl chloride.

[0060] (3) Add 1 weight part of mesoporous molecular sieve grafted with aminosilane and mercaptosila...

Embodiment 3

[0063] (1) 1.5 parts by weight of SBA-16 mesoporous molecular sieve (with a specific surface area of ​​900 m 2 / g), γ-aminopropylmethyldiethoxysilane accounting for 5wt% of SBA-16 mesoporous molecular sieve and γ-mercaptopropylmethyldiethoxysilane accounting for 10wt% of SBA-16 mesoporous molecular sieve were added To 20 parts by weight of toluene. Keep the temperature at 110°C, keep stirring, heat and reflux for 3 hours, filter after cooling, wash with a large amount of ethanol, and dry at 100°C for 5 hours to obtain a mesoporous molecular sieve grafted with aminosilane and mercaptosilane.

[0064] (2) Under nitrogen protection, 1 weight part of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and 1.2 weight part of thionyl chloride were added to 25 weight parts of chloroform, 50 The reaction was heated at ℃ for 7h, and then distilled under reduced pressure to obtain 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride.

[0065] (3) Add 1.5 parts by weight of mesopor...

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Abstract

The invention discloses an anti-aging high-viscosity asphalt additive and a preparation method thereof. The additive comprises the following raw material components by weight: 100 parts of SBS, 20-40parts of petroleum resin, 10-40 parts of aromatic oil, 10-20 parts of styrene-butadiene rubber, and 5-8 parts of modified mesoporous molecular sieve; The modified mesoporous molecular sieve is an aminosilane, a mercaptosilane, and a hindered phenol type antioxidant-modified mesoporous molecular sieve, and the hindered phenol type antioxidant is a hindered phenol type antioxidant containing a carboxyl group. The high-viscosity asphalt additive of the invention not only significantly improves the viscosity and cohesiveness of the asphalt, but also greatly improves the anti-aging property of theasphalt, thereby prolonging the service life of the road.

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): C08L95/00C08L53/02C08L57/02C08L9/06C08L91/00C08K13/06C08K5/5419C08K5/13C08K7/24C08K9/06C08K9/04B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704C08K2201/014C08L95/00C08L2201/08C08L2205/035C08L53/02C08L57/02C08L9/06C08L91/00C08K13/06C08K5/5419C08K5/13C08K7/24C08K9/06C08K9/04
Inventor 宋乐春陈保莲范思远张静程国香宁爱民李志军
Owner CHINA PETROLEUM & CHEM CORP
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