Composite modified coal asphalt and preparation method thereof

A composite modification, coal tar pitch technology, applied in building components, building insulation materials, construction, etc., can solve the problems of insignificant performance improvement, poor modification effect, high benzopyrene content, etc., to improve performance and stability , good performance, and the effect of reducing the content of polycyclic aromatic hydrocarbons

Active Publication Date: 2016-03-23
SHANXI PROVINCIAL RES INST OF COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on coal tar pitch mainly utilizes bitumen modification technology, but the modification effect is not good, the performance improvement is not obvious, and the problems of low temperature embrittlement and high benzopyrene content are still unsolved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Heat the medium temperature coal pitch and 70# Shell petroleum pitch in an oven at 120°C for 4 hours, then weigh 50 parts of medium temperature coal pitch and 50 parts 70# Shell petroleum pitch, mix them and add them to the stirred tank, heat and mechanically stir to 150°C , Stir at a constant temperature for 30 minutes; Weigh 5 parts of octyl phthalate and 5 parts of polyethylene glycol 600, slowly add them to the above stirring tank, continue to stir at constant temperature for 10 minutes; then switch to a high-speed shearing apparatus, adjust the speed to 4000rpm, And heat the stirred tank to 180°C, add 5 parts of styrene-butadiene-styrene block copolymer SBS, and use 5000rpm high-speed shear to keep the temperature of the asphalt mixture in the stirred tank between 180~190°C, constant temperature High-speed shearing for 60 minutes, and then natural cooling to room temperature, to prepare SBS composite modified coal pitch. The prepared modified coal pitch has a soften...

Embodiment 2

[0017] Heat the medium temperature coal pitch and 70# Shell petroleum pitch in an oven at 120°C for 4 hours, then weigh 50 parts of medium temperature coal pitch and 50 parts 70# Shell petroleum pitch, mix them and add them to the stirred tank, heat and mechanically stir to 150°C , Stir at a constant temperature for 30 minutes; Weigh 5 parts of butyl phthalate and 5 parts of polyethylene glycol 2000, slowly add them to the above stirring tank, continue to stir at constant temperature for 10 minutes; then switch to a high-speed shearing instrument, adjust the speed to 4000rpm, And heat the stirring tank to 180℃, add 5 parts of linear styrene-butadiene-styrene block copolymer SBS (S:B=30:70) and 2 parts of nano calcium carbonate, and use 5000rpm high-speed shearing to make the stirring The temperature of the asphalt mixture in the kettle is maintained between 180°C and 190°C, constant temperature, constant speed and high speed shear for 60 minutes, and then naturally cooled to roo...

Embodiment 3

[0019] Heat the medium temperature coal pitch and 90# Shell petroleum pitch in an oven at 120°C for 4 hours, then weigh 50 parts of medium temperature coal pitch and 50 parts 90# Shell petroleum pitch, mix them and add them to the stirred tank, heat and mechanically stir to 150°C , Stir at a constant temperature for 30 minutes; Weigh 5 parts of octyl phthalate and 10 parts of polyethylene glycol 600, slowly add them to the above stirring tank, continue to stir at constant temperature for 10 minutes; then switch to a high-speed shear instrument, adjust the speed to 4000rpm, And heat the stirred tank to 180°C, add 5 parts of linear styrene-butadiene-styrene block copolymer SBS (S:B=30:70), and use 5000rpm high-speed shear to keep the temperature of the asphalt mixture in the stirred tank The SBS composite modified coal pitch is prepared by shearing at a constant temperature and a high speed for 60 minutes at a temperature between 180°C and 190°C, and then naturally cooled to room ...

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Abstract

The invention relates to composite modified coal asphalt and a preparation method thereof. The composite modified coal asphalt includes the following raw materials, by mass, 30-90 parts of mid-temperature coal asphalt, 10-70 parts of petroleum coal asphalt, 0.1-5 parts of phthalate, 0-10 parts of polyethylene glycol, 0.1-10 parts of a SBS modifier, and 0-5 parts of nano calcium carbonate. The composite modified coal asphalt, compared with the prior art, has following advantages: the coal asphalt is improved in both high- and low-temperature performance, and especially, ductility at 5 DEG C reaches more than 50 cm without damage on the high-temperature performance, wherein the softening point of the coal asphalt is still maintained to be about 70 DEG C. The coal asphalt is free of long-time heating and can be prepared just through a normal modifying process. The coal asphalt is not only improved in high- and low-temperature performance but also significantly reduced in content of polycyclic aromatic hydrocarbon. The modifying process and requirement are more suitable for device and construction specifications of modified asphalt in the prior art.

Description

Technical field [0001] The invention belongs to the technical field of coal tar pitch modification, and specifically relates to a composite modified coal pitch and a preparation method thereof. Background technique [0002] my country is facing increasing scarcity of petroleum resources, high dependence on foreign countries, and high price of petroleum asphalt for road use. As a potential substitute for petroleum asphalt, coal pitch has gradually attracted the attention of many people. In 2013, coal output was as high as 3.7 billion tons, and coal tar output has reached more than 20 million tons. According to the ratio of coal tar to 50% to 60% of coal tar, the output of coal tar has reached nearly 10 million tons. The output was 29.2 million tons and the import volume of petroleum asphalt was 3.34 million tons. At present, the domestic and foreign research on coal asphalt is the high-performance mixed asphalt obtained by modifying coal asphalt with petroleum asphalt. The resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L71/02C08L53/02C08K5/12C08K9/04C08K3/26
CPCC08K2201/003C08K2201/011C08L95/00C08L2205/025C08L2205/03C08L71/02C08L53/02C08K5/12C08K9/04C08K2003/265
Inventor 蔡丽娜杜素军穆建青刘哲李元军胡国鹏张帅刘鹏飞庞瑾瑜宋杰华
Owner SHANXI PROVINCIAL RES INST OF COMM
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