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SBS asphalt modifier, preparation method and application thereof

A technology of asphalt modifier and stabilizer, which is applied in the field of SBS asphalt modifier, can solve the problem of high requirements, achieve the effect of reducing production requirements and improving stability

Inactive Publication Date: 2019-04-16
湖南鑫长胜材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods for improving the stability of SBS modified asphalt are mainly carried out during or after SBS modification. When ensuring the stability of SBS, it is necessary to face the stability between small doses of SBS modifiers and large doses of base asphalt. Compatibility issues, and the direct modification of SBS and base asphalt has higher requirements for asphalt mixing plant equipment

Method used

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  • SBS asphalt modifier, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In the present embodiment, the preparation method of SBS asphalt modifier is as follows:

[0030] 1) Weigh the following parts by weight and material composition: 15 parts of SBS, 2 parts of stabilizer, 30 parts of oleic acid, and 20 parts of stearic acid; wherein, the stabilizer is composed of sucrose fatty acid and titanic acid;

[0031] 2) Heat the oleic acid to 100°C, stir at a speed of 40r / min for 10min, add the stearic acid in the above parts by weight, continue to stir for 5min, and heat to 140°C to obtain a disperse base for later use;

[0032] 3) Add SBS to the prepared dispersion base, and use a high-speed shearer to shear for 40 minutes at a shear rate of 3000r / min;

[0033] 4) After the high-speed shearing is completed, the mixture is stirred at a speed of 20 r / min, the above-mentioned stabilizer is added in parts by weight, stirred for 5 minutes, and naturally cooled to normal temperature to obtain the finished product of SBS asphalt modifier A, which is re...

Embodiment 2

[0036] In the present embodiment, the preparation method of SBS asphalt modifier is as follows:

[0037] 1) Weigh the following parts by weight and material composition: 15 parts of SBS, 2 parts of stabilizer, 33 parts of oleic acid, 17 parts of stearic acid; wherein, the stabilizer is composed of sucrose fatty acid and titanic acid;

[0038] 2) Heat the oleic acid to 100°C, stir at a speed of 40r / min for 10min, add the stearic acid in the above parts by weight, continue to stir for 5min, and heat to 140°C to obtain a disperse base for later use;

[0039] 3) Add SBS to the prepared dispersion base, and use a high-speed shearer to shear for 40 minutes at a shear rate of 3000r / min;

[0040] 4) After the high-speed shearing is completed, the mixture is changed to stirring at a speed of 20 r / min, the above-mentioned stabilizer is added in parts by weight, stirred for 5 minutes, and naturally cooled to normal temperature to obtain the finished product of SBS asphalt modifier B, whi...

Embodiment 3

[0043] In the present embodiment, the preparation method of SBS asphalt modifier is as follows:

[0044] 1) Weigh the following parts by weight and material composition: 15 parts of SBS, 2 parts of stabilizer, 2 parts of oleic acid, 18 parts of stearic acid; wherein, the stabilizer is composed of sucrose fatty acid and titanic acid;

[0045] 2) Heat the oleic acid to 100°C, stir at a speed of 40r / min for 10min, add the stearic acid in the above parts by weight, continue to stir for 5min, and heat to 140°C to obtain a disperse base for later use;

[0046] 3) Add SBS to the prepared dispersion base, and use a high-speed shearer to shear for 40 minutes at a shear rate of 3000r / min;

[0047] 4) After the high-speed shearing is completed, the mixture is changed to stir at a speed of 20 r / min, the above-mentioned stabilizer is added in parts by weight, stirred for 5 minutes, and naturally cooled to normal temperature to obtain the finished product of SBS asphalt modifier C, which is...

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Abstract

The invention relates to an SBS asphalt modifier, a preparation method and application thereof. The SBS asphalt modifier comprises, by mass, the following components: 10-15 parts of SBS, 50-60 parts of dispersion base and 1-3 parts of a stabilizer, wherein the dispersion base consists of oleic acid and stearic acid according to a mass ratio of 1:0.5-0.7. The SBS asphalt modifier can be used for improving asphalt by adopting a direct-throw type, and the asphalt can be modified on a site of an asphalt mixing station without being provided with professional equipment such as a colloid mill and the like, so that the SBS asphalt modifier plays an important role in reducing the station building cost of the asphalt mixing station and popularization and application of the SBS asphalt; according tothe invention, the SBS is firstly sheared and dispersed and then modified, so that the problem that prior SBS modified asphalt cannot be stored for a long time after being prepared is solved, namely,a direct-throw mode is adopted, and the SBS asphalt modifier can be thrown when the asphalt is used.

Description

technical field [0001] The invention relates to a SBS asphalt modifier, a preparation method and application. Background technique [0002] SBS is a styrene-based thermoplastic elastomer, which is a styrene-butadiene-styrene triblock copolymer. SBS is currently the most widely used asphalt modifier, and its use can significantly improve the road performance such as high temperature stability and low temperature crack resistance of asphalt pavement materials. Although SBS asphalt modifier has the above significant advantages, there are also problems such as high preparation conditions, unstable storage (easy to delaminate, agglomerate or segregate), and difficulty in mixing construction. Among them, high preparation conditions and unstable storage are the most important. protrude. [0003] SBS is a kind of thermoplastic elastomer, which needs special equipment such as colloid mill to realize the modification of base asphalt; in addition, due to the compatibility problem bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08K5/09C08L95/00
CPCC08K5/09C08K2201/014C08L95/00C08L53/02
Inventor 李九苏张毅王潇潇沈增晖尹红星黄志轩
Owner 湖南鑫长胜材料科技有限公司
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