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Polystyrene modified asphalt and preparation method thereof

A technology of polystyrene and modified asphalt, which is applied in building components, building insulation materials, construction, etc., and can solve the problems of poor compatibility between polystyrene and asphalt, unfavorable application of modified asphalt, and poor storage stability and other problems, to achieve the effect of improving poor compatibility, preventing serious aging of asphalt, and good storage stability

Active Publication Date: 2015-11-25
SHANXI PROVINCIAL RES INST OF COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compatibility between polystyrene and asphalt is not good. When the amount of polystyrene is large, obvious phase separation will occur during high temperature storage, making polystyrene enriched in the upper layer of asphalt, which is not conducive to subsequent improvement. Application of permanent asphalt
Some studies have been carried out on the problem of poor storage stability of polystyrene modified asphalt, and relevant patents have been applied for. Most of them are used in conjunction with other types of modifiers. Styrene modified bitumen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Get 2 mass parts of triethoxychlorosilane, 8 mass parts of ethyl orthosilicate, dissolve in 170 mass parts of acetone, add 5 mass parts of hydrochloric acid (1mol / L) (5 mass parts of hydrochloric acid are evenly dispersed in 30 mass parts Then add acetone), co-hydrolyze at 40°C for 1 hour, precipitate with absolute ethanol, filter, and dry to obtain sample 1; connect the clean polymerization bottle to a vacuum-argon system, vacuumize, bake at high temperature, and fill Argon treatment, repeated 3 times, cooled for later use, added 1000 parts by mass of styrene monomer, dissolved in 5000 parts by mass of cyclohexane, heated in a water bath at 50°C for half an hour, added 1 part by mass of n-butyllithium, and reacted at 50°C After two hours, the polystyrene active body was obtained, and sample 1 was added to end-cap the polystyrene active body, precipitated with absolute ethanol, filtered, and dried to obtain a polystyrene-silicon dioxide hybrid material. Take 10g of poly...

Embodiment 2

[0016] Get 5 parts by mass of triethoxychlorosilane, 50 parts by mass of ethyl orthosilicate, dissolve in 1040 parts by mass of acetone, add 10 parts by mass of hydrochloric acid (1mol / L) (10 parts by mass of hydrochloric acid are evenly dispersed in 60 parts by mass of Acetone is then added), co-hydrolyzed at 40°C for 1 hour, precipitated by absolute ethanol, filtered, and dried to obtain sample 1; take 1000 parts by mass of styrene monomer, dissolve it in 5000 parts by mass of cyclohexane, and dissolve it in 5000 parts by mass of cyclohexane. Under protection, after heating in a water bath at 50°C for half an hour, add 1.5 parts by mass of n-butyl lithium, and react at 50°C for two hours to obtain a polystyrene active body, add sample 1 to end-cap the polystyrene active body, and Precipitate, filter and dry to obtain polystyrene-silica hybrid material. Take 15g of polystyrene-silica hybrid material and add it to 90g of toluene, and ultrasonically disperse at 25°C for 25 minu...

Embodiment 3

[0018] Get 8 mass parts of triethoxychlorosilane, 40 mass parts of ethyl orthosilicate, dissolve in 840 mass parts of acetone, add 20 mass parts of hydrochloric acid (1mol / L) (20 mass parts of hydrochloric acid are uniformly dispersed in 120 mass parts Acetone is then added), co-hydrolyzed at 40°C for 1 hour, precipitated by absolute ethanol, filtered, and dried to obtain sample 1; take 1000 parts by mass of styrene monomer, dissolve it in 5000 parts by mass of cyclohexane, and dissolve it in 5000 parts by mass of cyclohexane. Under protection, after heating in a water bath at 50°C for half an hour, add 2 parts by mass of n-butyllithium, and react at 50°C for two hours to obtain a polystyrene active body, add sample 1 to end-cap the polystyrene active body, and Precipitate with ethanol, filter and dry to obtain polystyrene-silica hybrid material. Take 15g of polystyrene-silica hybrid material and add it to 90g of xylene, and ultrasonically disperse at 25°C for 20 minutes to ob...

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Abstract

The invention belongs to the technical field of modified asphalt, and relates to polystyrene modified asphalt and a preparation method thereof. The polystyrene modified asphalt is composed of matrix asphalt and polystyrene-silicon dioxide hybrid materials. The doping quantity of the polystyrene-silicon dioxide hybrid materials is 2-5 wt%, and the molecular weight of polystyrene is 20-100 thousands. Compared with the prior art, the polystyrene modified asphalt has the advantages that the problem that the compatibility between the polystyrene and asphalt is poor is solved, and the polystyrene modified asphalt good in storage stability is obtained through preparation; the technology of the method is relatively simple, the production process is easy to control, the hybrid materials can be smoothly obtained, and industrialized prospects are good; the hybrid materials are in nanometer scale, and the problem that due to high surface energy of common nanometer materials, agglomeration is prone to occurring is solved; in the asphalt modification process, the preparation temperature is low and is only 110-130 DEG C, energy is saved, severe aging of the asphalt is prevented, and it is ensured that the modified asphalt has good performance.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt, and specifically relates to a polystyrene modified asphalt and a preparation method thereof. Background technique [0002] Asphalt roads have weaved our lives, and asphalt pavement with asphalt as a binder has become the leading material for road paving due to its advantages such as quick opening to traffic and comfortable driving. However, asphalt pavement also has a series of problems such as high temperature softening and low temperature cracking. In order to improve the high and low temperature performance of asphalt, modified asphalt was born. The source of raw materials for polystyrene preparation is sufficient and the output is large. It can be used as an asphalt modifier to expand the application range of polystyrene and enhance its application value. However, the compatibility between polystyrene and asphalt is not good. When the amount of polystyrene is large, obvious phase s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L25/06C08K3/36C08F112/08
Inventor 郭赢赢庞瑾瑜杜素军畅润田裴强薛君
Owner SHANXI PROVINCIAL RES INST OF COMM
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