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

A technology of modified asphalt and additives, applied in building components, building insulation materials, construction, etc., can solve the problems of poor polymer compatibility, poor asphalt compatibility, and insufficient anti-aging performance, and achieve environmental benefits Highlight, improve anti-aging performance, low production cost

Active 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 aging resistance.
[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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 4 parts by weight of MCM-41 mesoporous molecular sieve (with a specific surface area of ​​1000 m 2 / g), γ-mercaptopropyltrimethoxysilane accounting for 5wt% of MCM-41 mesoporous molecular sieve was added to 80 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 surface-modified mesoporous molecular sieve.

[0039] (2) 100 parts by weight of SBS (molecular weight is 100,000), 20 parts by weight of low density polyethylene (melt flow index is 5g / 10 min), 20 parts by weight of acetic acid-vinyl acetate copolymer (melt flow index is 10 g / 10 min), 20 parts by weight of aromatic oil (aromatic hydrocarbon content: 40wt%), 4 parts by weight of surface-modified mesoporous molecular sieves, and 2 parts by weight of 2,6-di-tert-butyl-p-cresol were mixed evenly, and then passed through the twin-screw Extruder, blending, extrudin...

Embodiment 2

[0041] (1) 5 parts by weight of MCM-48 mesoporous molecular sieve (with a specific surface area of ​​800 m 2 / g), γ-mercaptopropyltriethoxysilane accounting for 8wt% of MCM-48 mesoporous molecular sieve was added to 100 parts by weight of toluene. Keep the temperature at 120°C, keep stirring, heat to reflux for 2 hours, filter after cooling, wash with a large amount of ethanol, and dry at 100°C for 5 hours to obtain a surface-modified mesoporous molecular sieve.

[0042] (2) 100 parts by weight of SBS (molecular weight is 150,000), 15 parts by weight of low density polyethylene (melt flow index is 10g / 10 min), 15 parts by weight of acetic acid-vinyl acetate copolymer (melt flow index is 10 g / 10 min), 30 parts by weight of aromatic oil (aromatic hydrocarbon content is 60wt%), 5 parts by weight of surface-modified mesoporous molecular sieves, 3 parts by weight of 4,4'-thiobis(6-tert-butyl-3-methyl Base phenol) mixed evenly, through a twin-screw extruder, blending, extruding, an...

Embodiment 3

[0044] (1) 6 parts by weight of SBA-15 mesoporous molecular sieve (with a specific surface area of ​​1100 m 2 / g), γ-mercaptopropylmethyldiethoxysilane accounting for 10wt% of SBA-15 mesoporous molecular sieve was added to 120 parts by weight of toluene. Keep the temperature at 120°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 surface-modified mesoporous molecular sieve.

[0045] (2) 100 parts by weight of SBS (molecular weight is 200,000), 10 parts by weight of low density polyethylene (melt flow index is 20g / 10 min), 10 parts by weight of acetic acid-vinyl acetate copolymer (melt flow index is 20 g / 10 min), 40 parts by weight aromatic oil (aromatic hydrocarbon content is 80wt%), 6 parts by weight surface-modified mesoporous molecular sieve, 4 parts by weight β-(3,5-di-tert-butyl-4-hydroxyphenyl) After the isooctyl propionate is mixed evenly, it is blended and extruded and gr...

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Abstract

The invention discloses an anti-aging and high-viscosity modified asphalt additive and a preparation method thereof, wherein the anti-aging and high-viscosity modified asphalt additive comprises, by weight, 100 parts of SBS, 10-20 parts of low-density polyethylene, 10-20 parts of an acetic acid-vinyl acetate copolymer, 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 mercaptosilane-modified mesoporous molecular sieve. According to the present invention, with the additive, the adhesion of the asphalt is significantly improved, the aging resistance of the asphalt is substantially improved, and the compatibility with the asphalt is good.

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): C08L95/00C08L53/02C08L23/06C08L23/08C08L91/00C08K9/06C08K7/26C08K5/13C08K5/375C08K5/134
CPCC08K2201/006C08L53/02C08L95/00C08L2201/08C08L2205/02C08L2205/035C08L2207/066C08L2207/20C08L23/06C08L23/0853C08L91/00C08K9/06C08K7/26C08K5/13C08K5/375C08K5/1345
Inventor 郭小圣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