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Process for producing styrene-butadiene-styrene block copolymer (SBS) modified asphalt

A technology of modified asphalt and production process, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of high price of modifier SBS and increased cost of SBS modified asphalt.

Active Publication Date: 2012-08-22
HUBEI GUOCHUANG HI TECH MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The content of the modifier SBS in the modified asphalt made by such a production process needs to be more than 4.2% of the total, and its various technical indicators can meet the requirements of the industry standard highway engineering asphalt of the People's Republic of China. In order to make the technical indicators better , it is necessary to increase the content of modified asphalt, and among the materials of SBS modified asphalt, the price of modifier SBS is expensive, which increases the cost of SBS modified asphalt

Method used

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  • Process for producing styrene-butadiene-styrene block copolymer (SBS) modified asphalt
  • Process for producing styrene-butadiene-styrene block copolymer (SBS) modified asphalt
  • Process for producing styrene-butadiene-styrene block copolymer (SBS) modified asphalt

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Experimental program
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Effect test

Embodiment 1

[0029] First, No. 70 base asphalt is heated to 185 °, so that No. 70 base asphalt is in a molten state; secondly, 100 parts by weight of swollen No. 70 base asphalt and 7.79 parts by weight of linear SBS are mixed together and sheared to form a mixture; Add 54.12 parts by weight of swelled No. 70 matrix asphalt and 0.45 parts by weight of stabilizer in the sheared mixture again for a development, the development time is 3.5h, after the completion of the first development, it will be a semi-finished SBS modified asphalt; Add 54.12 parts by weight of swollen No. 70 base asphalt to the developed semi-finished SBS modified asphalt for secondary development. The development time is 0.5h. Linear SBS is 3.6%. Its main technical indicators are shown in Table 1. The control group is the main technical indicators of the SBS modified asphalt made by the existing production process, and the finished SBS modified asphalt contains 3.8% linear SBS.

[0030] Table 1

[0031]

Embodiment 2

[0033] Firstly, the No. 70 base asphalt is heated to 188°, so that the No. 70 base asphalt is in a molten state; secondly, 100 parts by weight of the swollen No. 70 base asphalt and 8.27 parts by weight of linear SBS are mixed together for shearing to form a mixture ; Add 54.37 parts by weight of swollen base asphalt and 0.46 parts by weight of stabilizer to the mixture after shearing again to develop once again. The development time is 4h, and it will be semi-finished product SBS modified asphalt after the completion of the first development; Add 54.37 parts by weight of swollen No. 70 base asphalt to the developed semi-finished SBS modified asphalt for secondary development. Type SBS is 3.8%. Its main technical indicators are shown in Table 2, in which the control group is the main technical indicators of SBS modified asphalt produced by one-time development of the existing production process, and the finished SBS modified asphalt contains 4.4% linear SBS.

[0034] Table 2 ...

Embodiment 3

[0037] Firstly, No. 70 base asphalt is heated to 190°, so that No. 70 base asphalt is in a molten state; secondly, 100 parts by weight of swollen No. 70 base asphalt and 8.86 parts by weight of linear SBS are mixed together for shearing to form a mixture ; Add 54.67 parts by weight of swollen base asphalt and 0.49 parts by weight of stabilizer to the mixture after shearing again to develop once again. The development time is 4.2h, and it will be semi-finished SBS modified asphalt after the completion of the first development; Add 54.67 parts by weight of swollen No. 70 base asphalt to the semi-finished SBS modified asphalt after the primary development for secondary development, and the development time is 1.2 hours; Contains 4.0% linear SBS. Its main technical indicators are shown in Table 3, wherein the control group is the main technical indicators of SBS modified asphalt produced by one-time development of the existing production process, and the finished SBS modified asph...

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Abstract

The invention discloses a process for producing styrene-butadiene-styrene block copolymer (SBS) modified asphalt, which includes the following steps of a swelling, a shearing, a primary development, a secondary development and an obtainment of a finished product of the SBS modified asphalt, wherein the swelling includes that base asphalt is heated to be in a molten state, the shearing includes that the base asphalt after being subjected to the swelling is mixed with a SBS modifier to be subjected to shearing and grinding to form a mixture, the primary development comprises that a portion of the base asphalt subjected to the swelling and a stabilizing agent are added into the mixture after shearing to develop and a semi-finished product of the SBS modified asphalt is obtained after the primary development is completed, the secondary development comprises that the base asphalt subjected to the swelling is further added into the semi-finished product of the SBS modified asphalt obtained in the primary development to develop, and the finished product of the SBS modified asphalt is obtained after the secondary development is completed. By means of the process for producing the styrene-butadiene-styrene block copolymer (SBS) modified asphalt, the asphalt is subjected to developing for two times, and a full development is achieved by adding a portion of the base asphalt subjected to swelling in each time of developing, thereby the content of the SBS modifier in the finished product is equal to or larger than 3.6% and simultaneously the technical index of the finished product can meet the requirements of highway engineering asphalt of industry standard of People' Republic of China.

Description

technical field [0001] The invention relates to a production process of modified asphalt, in particular to a production process of SBS modified asphalt. Background technique [0002] The existing SBS modified asphalt production process includes the following steps: [0003] 1) Swelling: heating the base asphalt to make the base asphalt in a molten state; [0004] 2) Shearing: The swollen matrix asphalt and modifier SBS are mixed, sheared and ground to form a mixture; [0005] 3) Development: adding swollen matrix asphalt and stabilizer to the sheared mixture for development; [0006] 4) After the development is completed, it becomes SBS modified asphalt. [0007] The existing production process of modified asphalt is a primary development process, and in the existing process, the heating temperature for swelling is 180-185°. The growth temperature is controlled at 170-190°C, and the growth is carried out for about 4 hours under the action of a stirrer. [0008] The cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02
Inventor 张树领江辉张明仲春南
Owner HUBEI GUOCHUANG HI TECH MATERIAL
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