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Polymer modified asphalt and preparation method thereof

A technology of modifying asphalt and polymers, which is applied to building structures, building components, building insulation materials, etc., and can solve the problems of reduced storage stability of asphalt, increased production costs of asphalt, and substandard low-temperature ductility. Storage stability, viscosity reduction, aggregation prevention effects

Pending Publication Date: 2019-06-18
张莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When ordinary SBS is used to prepare modified asphalt, a higher amount of incorporation is generally required to achieve a higher softening point, so as to meet the requirements of low temperature ductility; if a higher amount of sulfur is used, although the amount of SBS is reduced, the softening will be improved at the same time. point, but the low-temperature ductility is not up to the standard, and the viscosity at 135°C may be too large; in addition, the low-molecular-weight SBS is used to prepare modified asphalt, and its low-temperature ductility is often just up to the standard. The requirements cannot be met in production; in addition, higher SBS content will increase the production cost of asphalt, and the increase of SBS output will also reduce the storage stability of asphalt

Method used

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  • Polymer modified asphalt and preparation method thereof

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Effect test

Embodiment 1

[0044] A polymer-modified asphalt comprising the following components by weight: 70 parts of road petroleum asphalt, 1 part of styrene-butadiene-styrene block copolymer, N-(2- 0.1 part of aminoethyl)-3-aminopropyltrimethoxysilane, 0.1 part of zinc diethyldithiocarbamate and 1 part of minus three-line extraction oil.

[0045] Adopt above-mentioned raw material to prepare a kind of polymer-modified asphalt, and the preparation method of this polymer-modified asphalt comprises the following steps:

[0046] (1) Weigh 70 parts of road petroleum asphalt and 1 part of styrene-butadiene-styrene block copolymer, and ultrasonically disperse 5min while stirring at 160° C. The ultrasonic frequency is 30KHz, and mix uniformly to obtain styrene-butylene Diene-styrene block copolymer - road petroleum asphalt mixture;

[0047] (2) Weigh 0.1 part of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 0.1 part of zinc diethyldithiocarbamate and 1 part of minus three-line extraction oil, add step (...

Embodiment 2

[0049] A polymer-modified asphalt comprising the following components in parts by weight: 75 parts of coal tar pitch, 2 parts of styrene-isoprene-styrene block copolymer, aniline methyl trimethoxy 0.5 part of base silane, 0.5 part of zinc ethylphenyl dithiocarbamate and 2 parts of minus four-line extraction oil.

[0050] Adopt above-mentioned raw material to prepare a kind of polymer-modified asphalt, and the preparation method of this polymer-modified asphalt comprises the following steps:

[0051] (1) Weigh 75 parts of coal tar pitch and 2 parts of styrene-isoprene-styrene block copolymer, and ultrasonically disperse 6min while stirring at 170°C, and the ultrasonic frequency is 40KHz, and mix uniformly to obtain styrene-isoprene Pentadiene-styrene block copolymer-coal tar mixture;

[0052] (2) Weigh 0.5 part of aniline methyl trimethoxysilane, 0.5 part of zinc ethyl phenyl dithiocarbamate and 2 parts of minus four-line extraction oil, add the styrene-isoprene obtained in st...

Embodiment 3

[0054] A polymer-modified asphalt, the polymer-modified asphalt comprises the following components by weight: 80 parts of straight-run asphalt, 5 parts of styrene-ethylene-butylene-styrene block copolymer, N-aminoethyl 0.5 part of base-3-aminopropylmethyldimethoxysilane, 1 part of bispentamethylenethiuram tetrasulfide, and 3 parts of a mixture of minus three-line extraction oil and minus four-line extraction oil.

[0055] Adopt above-mentioned raw material to prepare a kind of polymer-modified asphalt, and the preparation method of this polymer-modified asphalt comprises the following steps:

[0056] (1) Weigh 80 parts of straight-run asphalt and 5 parts of styrene-ethylene-butylene-styrene block copolymer, and ultrasonically disperse 8min while stirring at 195° C., the ultrasonic frequency is 55KHz, and mix uniformly to obtain styrene- Ethylene-butylene-styrene block copolymer-straight-run asphalt mixture;

[0057] (2) Weigh 0.5 part of N-aminoethyl-3-aminopropylmethyldimeth...

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Abstract

The invention discloses a polymer modified asphalt and a preparation method thereof. The polymer modified asphalt comprises base asphalt, a polymer, a coupling agent, a promoter and a compatibilizer.The preparation method of the polymer modified asphalt comprises the following steps: weighing the base asphalt and the polymer, and ultrasonically dispersing the base asphalt and the polymer while stirring under a heating condition to achieve uniform mixing in order to obtain a polymer-base asphalt mixture; and weighing the coupling agent, the promoter and the compatibilizer, adding the weighed materials into the polymer-base asphalt mixture, performing ultrasonic dispersing while stirring, carrying out a reaction for a period of time, performing shearing treatment by a high-speed shearing machine, and naturally cooling the sheared reaction product to room temperature to obtain the polymer modified asphalt. Experimental results show that the prepared polymer modified asphalt has the advantages of good low temperature performances, good high temperature performances, good aging resistance, excellent bonding property and high storage stability.

Description

technical field [0001] The invention relates to the technical field of modified asphalt production, in particular to a polymer modified asphalt and a preparation method thereof. Background technique [0002] Polymer-modified asphalt has been widely used in road construction due to its excellent performance, and the factors affecting the road performance of polymer-modified asphalt are mainly modifiers, such as SBS, SBR, etc., relying on simple high-speed stirring It is difficult to make the polymer and the matrix asphalt fully miscible in a limited time. It is necessary to use external force to make the polymer reach a certain particle size and disperse and swell evenly in the asphalt, so the compatibility between the polymer and the matrix asphalt is improved. It is of great significance for improving the road performance of asphalt pavement. It is usually processed by colloid mill and high-speed shearing machine, which is also the commonly used asphalt modification produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K5/544C08K5/5425C08K5/39C08K5/40C08K5/47
Inventor 张莉
Owner 张莉
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