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Continuous production technology for SBS (styrene-butadiene-styrene) modified asphalt

A technology of modified asphalt and production process, which is applied in building components, building insulation materials, buildings, etc. It can solve the problems of long shearing and grinding time, inability to effectively reduce production costs, long production time, etc., and achieve high temperature aging resistance. , Improve the effect of shearing and grinding, and slow down the effect of performance attenuation

Inactive Publication Date: 2015-06-03
弘润石化(潍坊)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the shearing and grinding equipment is severely worn, and the production time is long, which cannot effectively reduce the production cost
CN102010610B Chinese patent proposes a preparation method of SBS modified asphalt, the method uses a star-shaped SBS modifier, although it can provide the performance of modified asphalt, but because the star-shaped SBS modifier is harder than the linear SBS, processing is difficult Big
Therefore, when producing modified asphalt, the shearing and grinding time is long, and it must be mixed for more than 2 hours before the shearing and grinding process, which is not convenient for continuous production, resulting in low production efficiency
[0016] None of the prior art mentions the treatment process of harmful gases generated in the production process

Method used

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  • Continuous production technology for SBS (styrene-butadiene-styrene) modified asphalt
  • Continuous production technology for SBS (styrene-butadiene-styrene) modified asphalt
  • Continuous production technology for SBS (styrene-butadiene-styrene) modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Heating and heating: the No. 90 heavy traffic road asphalt is heated to 192°C through a heat transfer oil heat exchanger, and pumped into the premix tank through pipelines;

[0035] (2) Premixing and mixing: When adding asphalt to cover the bottom of the premixing tank, mix 100 parts by weight of asphalt with 3.6 parts by weight of linear SBS modifier, 0.25 parts by weight of stabilizer, and 0.05 parts by weight of anti-aging agent. With the inflow of asphalt, gradually add SBS modifier, stabilizer and anti-aging agent, and stir and mix at the same time, the stirring temperature is 189 ° C, and the stirring time is 18 seconds;

[0036] (3) Shear grinding: pump the above-mentioned asphalt mixture into a high-shear colloid mill at a rate of 1 ton / min, and shear and grind at 187°C to make more than 86% of SBS The active agent is crushed into particles with a particle size of 2 to 5 microns;

[0037] (4) Stirring and development: transport the sheared and ground mixtur...

Embodiment 2

[0044] (1) Heating and heating: the No. 70 heavy traffic road asphalt is heated to 194°C through a heat transfer oil heat exchanger, and pumped into the premix tank through pipelines;

[0045] (2) Premixing: When adding asphalt to cover the bottom of the premixing tank, mix 100 parts by weight of asphalt with 3.7 parts by weight of linear SBS modifier, 0.26 parts by weight of stabilizer, and 0.03 parts by weight of antiaging agent. With the inflow of asphalt, gradually add SBS modifier, stabilizer and anti-aging agent, and stir and mix at the same time, the stirring temperature is 190 ° C, and the stirring time is 16 seconds;

[0046] (3) Shear grinding: pump the above-mentioned asphalt mixture into a high-shear colloid mill, the speed of the high-shear colloid mill is 1 ton / min, and shear and grind at 189°C, so that more than 86% of the SBS The active agent is crushed into particles with a particle size of 2 to 5 microns;

[0047] (4) Stirring and development: transport the ...

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Abstract

The invention relates to a continuous production technology for SBS (styrene-butadiene-styrene) modified asphalt. The continuous production technology comprises the following steps: (1), heating: 100 parts by weight of 70# or 90# heavy-duty road asphalt are heated to 191-194 DEG C; (2), premixing stirring: 100 parts by weight of the asphalt in the step (1), 3.5-3.9 parts by weight of a linear SBS modifier, 0.25-0.29 parts by weight of a stabilizer and 0.01-0.1 parts by weight of an anti-aging agent are matched and stirred to form an asphalt mixture, the relative molecular mass of the linear SBS is not larger than 200,000, the stirring temperature is 189-192 DEG C, and the stirring time is 12-24 seconds; (3), shearing and grinding: the asphalt mixture is sheared and ground at the temperature of 186-190 DEG C, so that more than 86% of the SBS modifier is ground into particles with the diameter ranging from 2 microns to 5 microns; and (4), stirring for development: the sheared and ground mixture is conveyed to a development tank and is stirred continuously for 1 hour at the temperature of 175-179 DEG C, and the SBS modified asphalt meeting requirements is obtained. The continuous production technology for the SBS modified asphalt is high in production efficiency, good in modifying effect, environment-friendly and energy-saving.

Description

technical field [0001] The invention relates to the technical field of a production method of modified asphalt, in particular to a continuous production process of SBS modified asphalt for roads. Background technique [0002] SBS modified asphalt is made by adding a small amount of SBS thermoplastic rubber to base asphalt and processing it through a certain process. SBS is a styrene-butadiene-styrene block copolymer with a white popcorn-like appearance, light and porous, and is a tough and highly elastic material below the glass transition temperature of the polystyrene component. At higher temperatures, it becomes a fluid state close to a linear polymer. It has both the elastic properties of rubber and the thermoplastic properties of resin, so it has the advantages of good elasticity, high tensile strength, and good low-temperature deformation performance, which can improve the high-temperature stability and low-temperature crack resistance of asphalt. [0003] The reason...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02
Inventor 李玉森李洪斗高娜
Owner 弘润石化(潍坊)有限责任公司