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Emulsified SBS (styrene-butadiene-styrene) modified asphalt and preparation method of emulsified SBS modified asphalt

A technology of modified asphalt and asphalt, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of severe crusting, non-emulsification, emulsification difficulties, etc., and achieve good high-temperature performance, easy emulsification, and superior performance.

Active Publication Date: 2011-10-19
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of SBS modified asphalt is very difficult to emulsify even under special emulsification conditions, often resulting in severe skinning, poor emulsion stability, or even no emulsification results. There is a saying in the industry that emulsifying SBS modified asphalt is not feasible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The composition formula of emulsified SBS modified asphalt and the technical parameters of SBS used:

[0033] Base bitumen SK-70 55%

[0034] SBS (block ratio S / B=25 / 75, molecular weight 120,000) 3.5% (relative to asphalt)

[0035] SWD 0.35% (relative to asphalt)

[0036] Water heated to 70°C 40%

[0037] Positive emulsifier YT-CSS03 1.5% (relative to asphalt)

[0038] Calcium chloride 0.5% (relative to water)

[0039] Thickener 0.3% (relative to water)

[0040] Preparation method of emulsified SBS modified asphalt

[0041] 1. Heat base asphalt to 180°C, add SBS modifier, and stir for 20 minutes.

[0042] 2. Add stabilizer SWD, and shear for 20 minutes under high-speed shear of 4000r / min.

[0043] 3. Prepare soap solution. Add emulsifier, calcium chloride, and thickener to hot water at 70°C, stir evenly until completely dissolved, then add hydrochloric acid to adjust the pH to 3, and the soap liquid is obtained.

[0044] 4. Under the high-speed shearing above 300...

Embodiment 2

[0051] The composition formula and emulsification method of the emulsified SBS modified asphalt are the same as in Example 1, except that the technical parameters of the SBS used are changed. The block ratio (S / B) of the SBS used is 22 / 78 and the molecular weight is 130,000.

[0052] Properties of emulsified SBS modified asphalt

[0053] Data for emulsification temperature 70-90°C

[0054] Softening point of emulsion evaporation residue (°C) 73

[0055] 5°C ductility of emulsion evaporation residue (cm) 35

[0056] Emulsion storage stability (5d)% 3.2

Embodiment 3

[0058] The SBS technical parameters and emulsification method used for emulsifying SBS modified asphalt are the same as in Example 1, and the formula is basically the same as in Example 1, except that the amount of SBS used is reduced to 3%, and the amount of stabilizer SWD used is increased to 0.4%.

[0059] Properties of emulsified SBS modified asphalt

[0060] Data for emulsification temperature 70-90°C

[0061] Softening point of emulsion evaporation residue (°C) 73

[0062] 5°C ductility of emulsion evaporation residue (cm) 30

[0063] Emulsion storage stability (5d)% 3.6

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Abstract

The invention discloses an emulsified SBS (styrene-butadiene-styrene) modified asphalt and a preparation method of the emulsified SBS modified asphalt; the emulsified SBS modified asphalt comprises 55-60 percent of matrix asphalt, 2.5-4 percent of SBS, 0.1-0.5 percent of SBS modified asphalt stabilizer SWD, 1-3 percent of asphalt cationic emulsifier, 40-45 percent of water, calcium chloride equivalent to 0.3-0.8 percent of water quality, thickening agent equivalent to 0.1-0.5 percent of water quality and acid for adjusting the pH value to be from 2 to 4, wherein SBS has a linear structure, the block ratio is 20 / 80-28 / 72, and the molecular weight is 100,000-160,000. The emulsified SBS modified asphalt evaporated residue has good high-temperature performance, the softening point can reach more than 72 DEG C, and the ductility can reach more than 30cm, thereby being the emulsified modified asphalt with high performance and widely applied to the building and maintenance of high-level roads.

Description

technical field [0001] The invention belongs to the technical field of asphalt modification and emulsification processing, and relates to road modified asphalt materials, in particular to emulsified SBS modified asphalt and its modification and emulsification methods. Background technique [0002] SBS is a block copolymer of styrene and butadiene. Those engaged in technology in the industry know that the technical parameters of SBS are different, that is, the block ratio, molecular weight, and configuration (linear, star) are different, and their performance is also quite different. The difference in tensile strength, elongation, permanent set, hardness, melt flow rate, viscosity and other factors directly affects its application effect. In fact, the present invention shows that factors such as the molecular weight and block ratio of SBS have a great influence on the performance of emulsified SBS modified asphalt, especially the emulsification effect. [0003] Emulsified a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K3/24C08K5/19
Inventor 袁煜艳郭正晖黎伟何林
Owner CHINA PETROCHEMICAL CORP
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