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A kind of mesoporous molecular sieve modified asphalt and its preparation method

A technology of mesoporous molecular sieve and modified asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems of physical migration and volatilization of anti-aging agents, segregation and stratification of inorganic fillers and asphalt, affecting anti-aging performance, etc. Achieve the effect of improving anti-aging performance, improving anti-oxidation efficiency and reducing high temperature rutting

Active Publication Date: 2020-08-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modifier is simply added to the asphalt, causing problems such as volatilization and migration of the anti-aging agent and antioxidant. At the same time, the light shielding agent used is carbon black, which is prone to segregation due to poor compatibility between carbon black and asphalt Delamination affects the performance of its anti-aging properties
[0007] In summary, the existing technology simply adds inorganic fillers or anti-aging agents to asphalt, which will lead to segregation and delamination of inorganic fillers and asphalt, as well as physical migration and volatilization of anti-aging agents, resulting in limited anti-aging performance

Method used

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  • A kind of mesoporous molecular sieve modified asphalt and its preparation method
  • A kind of mesoporous molecular sieve modified asphalt and its preparation method
  • A kind of mesoporous molecular sieve modified asphalt and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) 1 part by weight of MCM-41 mesoporous molecular sieve (specific surface area is 1000m 2 / g), account for MCM-41 mesoporous molecular sieve 15wt% 3-aminopropyltrimethoxysilane and account for MCM-41 mesoporous molecular sieve 4wt% gamma-mercaptopropyltrimethoxysilane join in 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.

[0049] (2) Under nitrogen protection, 1 weight part of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)acrylic acid and 1.4 weight part of thionyl chloride were added to 30 weight parts 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.

[0050] (3) Add 1 part by weight of mesoporous molecular sieve grafted with aminosilan...

Embodiment 2

[0053] (1) 1 part by weight of SBA-15 mesoporous molecular sieve (specific surface area is 1100m 2 / g), account for 3-aminopropyltriethoxysilane of SBA-15 mesoporous molecular sieve 10wt%, and account for the gamma-mercaptopropyl triethoxysilane of SBA-15 mesoporous molecular sieve 6wt% to join in 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.

[0054] (2) Under the protection of nitrogen, 1 part by weight of 3,5-di-tert-butyl-4-hydroxybenzoic acid and 1.3 parts by weight of thionyl chloride were added to 25 parts by weight of chloroform, heated at 50°C for 8 hours, and the Pressure distillation to obtain 3,5-di-tert-butyl-4-hydroxybenzoyl chloride.

[0055] (3) Add 1 part by weight of mesoporous molecular sieve grafted with aminosilane and mercapt...

Embodiment 3

[0058] (1) 1.5 parts by weight of SBA-16 mesoporous molecular sieve (specific surface area is 900m 2 g), account for γ-aminopropylmethyldiethoxysilane of SBA-16 mesoporous molecular sieve 5wt%, and account for γ-mercaptopropylmethyldiethoxysilane of SBA-16 mesoporous molecular sieve 10wt% add 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.

[0059] (2) Under nitrogen protection, 1 part by weight of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and 1.2 parts by weight of thionyl chloride were added to 25 parts by weight 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.

[0060] (3) 1.5 parts by weight of mesoporous molecular sie...

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Abstract

The invention discloses mesoporous molecular sieve modified asphalt and a preparation method thereof, wherein the modified asphalt comprises the following raw material components by weight: 100 partsof matrix asphalt, and 1.0-5.0 parts of a modified mesoporous molecular sieve, the modified mesoporous molecular sieve is a mesoporous molecular sieve modified with aminosilane, mercaptosilane and hindered phenol type antioxidant, and the hindered phenol type antioxidant contains a carboxyl group. According to the present invention, the asphalt is modified with the mesoporous molecular sieve, wherein the hindered phenol main antioxidant is introduced into the mesoporous molecular sieve through mercaptosilane and aminosilane surface modification and reaction, and the introduced mercapto and themain antioxidant synergistically act so as to substantially improve the aging resistance and improve the compatibility between the asphalt and the mesoporous molecular sieve, such that the service life of the road is prolonged.

Description

technical field [0001] The invention relates to a modified asphalt and a preparation method thereof, in particular to a mesoporous molecular sieve modified asphalt and a preparation method thereof. Background technique [0002] Asphalt is an important road paving material, but limited by its own performance, the high and low temperature performance of asphalt is unstable. Under the strong sunlight in summer, the asphalt is easy to soften, causing rutting and wrapping; in cold winter, cracks are easy to appear, which seriously affects the comfort of driving on the road and the service life of the road. With the development of transportation in the direction of high speed, heavy load, large flow, and channelization, not only the roadbed is required to be solid and firm, but also the road surface is required to have functions such as wear resistance, high temperature resistance, softening resistance, and smoothness. The research and application of high-performance modified asp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K9/06C08K9/04C08K7/26
CPCC08K7/26C08K9/04C08K9/06C08K2201/006C08L2201/08C08L95/00
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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