Asphalt modifier and asphalt composition comprising same

Abstract

The present invention relates to an asphalt modifier and an asphalt composition including the same, and more particularly, to an asphalt modifier capable of effectively improving low-temperature properties, high-temperature properties, storage stability, and the like of an asphalt composition due to excellent compatibility with the asphalt composition when a vinyl aromatic hydrocarbon-conjugated diene block copolymer containing a certain multifunctional group is used as the asphalt modifier, and an asphalt composition including the same.

Description

TECHNICAL FIELD[0001]This application claims the benefit of Korean Patent Application No. 10-2016-0137678, filed on Oct. 21, 2016, with the Korean Intellectual Property Office, the disclosure of which is herein incorporated by reference in its entirety.[0002]The present invention relates to an asphalt modifier having excellent compatibility with asphalt and an asphalt composition including the same.BACKGROUND ART[0003]Asphalt is a residue which is obtained after most of volatile oils in components of crude oil are evaporated, and has a physical property of being maintained in a liquid or semi-solid state having a high viscosity at a high temperature but being firmly hardened at a temperature less than or equal to room temperature.[0004]Because the asphalt has good plasticity, high water repellency, electrical insulating properties and adhesiveness, and chemically stable characteristics, the asphalt has been widely used for construction materials such as paving materials or waterproo...

AI Technical Summary

Benefits of technology

The present invention is related to an asphalt modifier that can improve the workability and physical properties of asphalt. The asphalt modifier is made by introducing a certain multifunctional group into a vinyl aromatic hydrocarbon-conjugated diene block copolymer. The addition of this particular copolymer improves the compatibility between the asphalt and the modifier, resulting in improved processability and workability of the asphalt composition. The method also avoids the drawback of decreased molecular weight of the block copolymer and ensures effective improvement in the physical properties of the asphalt composition.

Problems solved by technology

However, the asphalt has drawbacks in that plastic deformation occurs during use when the asphalt is exposed to a high temperature for a prolonged period of time and cracking occurs at a low temperature due to external impacts.

When the vinyl aromatic hydrocarbon-conjugated diene block copolymer is used as the asphalt modifier, much time and cost are required to dissolve the block copolymer at a high temperature.

Because the asphaltene as an aggregate of aromatic hydrocarbons, includes a large amount of polar functional groups at the ends thereof, the asphaltene has very low compatibility with block copolymers having no polar functional groups.

Thus, a processing time or a manufacturing time of the asphalt may not only be remarkably extended, but a decline in quality of the asphalt, for example, a decrease in elasticity of modified asphalt, may also be caused.

Such patents have somewhat improved compatibility with the asphalt composition, but do not exhibit a sufficient improvement effect.

Also, the patents have no ultimate solution because there is a high variation in quality of asphalt according to crude oil and asphalt compositions obtained accordingly also have different modification effects.

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