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Stabilizer, application thereof, SBS modified asphalt and preparation method of SBS modified asphalt

A modified asphalt and stabilizer technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of increased cost of modified asphalt, poor controllability, and large amount of addition, and achieves improved thermal storage stability, Prevent aggregation and sedimentation, enhance the effect of dispersion

Inactive Publication Date: 2020-04-24
河南东方雨虹建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the storage stability of SBS modified asphalt, SBS modified asphalt stabilizers have emerged one after another. From the characteristics of SBS modified asphalt stabilizers produced at home and abroad, first, the use of molecules with polar groups to SBS Carry out chemical grafting, enhance the interaction between SBS and asphalt, and prevent phase separation, but because the amount of SBS added to asphalt is relatively large, the amount of modifier used in chemical grafting is relatively large, which greatly increases the cost of modified asphalt; Second, use sulfur to carry out cross-linking reaction on SBS to increase the network structure of SBS. The controllability of this cross-linking reaction is poor, and there is a risk of cylinder solidification

Method used

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  • Stabilizer, application thereof, SBS modified asphalt and preparation method of SBS modified asphalt
  • Stabilizer, application thereof, SBS modified asphalt and preparation method of SBS modified asphalt
  • Stabilizer, application thereof, SBS modified asphalt and preparation method of SBS modified asphalt

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Experimental program
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Effect test

Embodiment 1

[0037] This embodiment provides a stabilizer and SBS modified asphalt and a preparation method thereof.

[0038] Preparation of stabilizer:

[0039] Styrene-maleic anhydride copolymer (obtained by polymerization of styrene and maleic anhydride with a molar ratio of 1:0.3 under the protection of nitrogen and under the action of a free radical initiator), with stearyl alcohol in acetone solvent (The molar ratio of stearyl alcohol to styrene-maleic anhydride copolymer is 1.5:1), esterification reaction is carried out under the catalysis of sulfuric acid, after 4 hours of reaction at 60°C, add distilled water to recrystallize, filter, and dry to obtain a stabilizer .

[0040] Raw material composition of SBS modified asphalt:

[0041] 100 parts of 200# asphalt (Wenzhou PetroChina Fuel Asphalt Co., Ltd.), 5 parts of linear SBS (T6302H, Dushanzi Petrochemical Company), 0.2 parts of stabilizer.

[0042] SBS modified asphalt performance test:

[0043] Pour the SBS modified asphalt ...

Embodiment 2

[0047] This embodiment provides a stabilizer and SBS modified asphalt and a preparation method thereof.

[0048] Preparation of stabilizer:

[0049] Styrene-maleic anhydride copolymer (obtained by polymerization of styrene and maleic anhydride with a molar ratio of 1:0.5 under the protection of nitrogen and the action of a free radical initiator), and dodecanol in acetone solvent (The molar ratio of dodecanol to styrene-maleic anhydride copolymer is 1.5:1), esterification reaction is carried out under the catalysis of sulfuric acid, after 4 hours of reaction at 60°C, add distilled water to recrystallize, filter, and dry to obtain a stabilizer .

[0050] Raw material composition of SBS modified asphalt:

[0051]100 parts of 90# asphalt (Qinhuangdao Zhongyou Petrochemical Co., Ltd.), 6 parts of star-shaped SBS (star-shaped SBS 4402, Yanshan Petrochemical) and 0.1 part of stabilizer.

[0052] SBS modified asphalt performance test:

[0053] Pour the SBS modified asphalt (compa...

Embodiment 3

[0057] This embodiment provides a stabilizer and SBS modified asphalt and a preparation method thereof.

[0058] Preparation of stabilizer:

[0059] Styrene-maleic anhydride copolymer (obtained by polymerization of styrene and maleic anhydride with a molar ratio of 1:0.8 under the protection of nitrogen and the action of a free radical initiator), with n-octanol in acetone solvent (The molar ratio of n-octanol to styrene-maleic anhydride copolymer is 1.5:1), the esterification reaction is carried out under the catalysis of sulfuric acid, after reacting at 60°C for 4 hours, add distilled water to recrystallize, filter, and dry to obtain the stabilizer .

[0060] Raw material composition of SBS modified asphalt:

[0061] 100 parts of 70# asphalt (Shandong Dongbo Petrochemical Co., Ltd.), 4 parts of linear SBS (T6302H, Dushanzi Petrochemical Company), 0.5 parts of stabilizer.

[0062] SBS modified asphalt performance test:

[0063] Pour the SBS modified asphalt (comparative e...

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Abstract

The invention discloses a stabilizer and an application thereof, and SBS modified asphalt and a preparation method thereof. The stabilizer is prepared by a method comprising the following steps: carrying out an esterification reaction on a styrene-maleic anhydride copolymer and long-chain alcohol under the action of acid catalysis to obtain the stabilizer. The stabilizer disclosed by the inventioncan stably adsorb and act on polystyrene chains and asphaltene macromolecules of SBS; by utilizing the long-chain alkyl, the agglomeration of SBS and the aggregation and sedimentation of asphaltene in the heat storage process can be prevented, and the dispersion effect of light components in the asphalt on the SBS and the asphaltene can be enhanced, so that the SBS modified asphalt has long-termheat storage stability.

Description

technical field [0001] The invention belongs to the field of modified asphalt, and more specifically relates to a stabilizer and its application, SBS modified asphalt and its preparation method. Background technique [0002] In the 1990s, the elastomer modifier SBS became the preferred material for modified asphalt. SBS modified asphalt has a high softening point, does not soften at higher temperatures, does not brittle at low temperatures, and has better mechanical properties. Therefore, SBS modified asphalt Asphalt has been widely used in building waterproofing materials and highway pavement. [0003] Due to the large differences in structure, composition and relative density between SBS and base asphalt, the compatibility between SBS and base asphalt is not good, and SBS and asphalt are only physically miscible. After SBS is added to asphalt, it absorbs light components in asphalt and swells to form a microscopic multiphase system. During (thermal) storage, on the one ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/14C08F212/08C08F222/08C08L95/00C08L53/02C08L35/06
CPCC08F8/14C08F212/08C08L95/00C08L2205/03C08L2201/08C08L53/02C08L35/06C08F222/08
Inventor 吴信朋刘金景吴士玮苏长泳王充徐佳龙
Owner 河南东方雨虹建筑材料有限公司
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