Long-chain alkyl polyamine series asphalt anti-stripping agent and preparation method thereof

Abstract

The invention discloses a long-chain alkyl polyamine series asphalt anti-stripping agent. The raw materials of the anti-stripping agent include long-chain alkyl organic acids, epichlorohydrin and organic amines. Good compatibility, easy to dissolve and disperse in asphalt; moderate molecular weight, low viscosity, lower viscosity than asphalt, no migration and precipitation; mild synthesis conditions and other characteristics. In the invention, the raw materials are easily obtained, the synthesis reaction conditions are mild and easy to implement, and the structure and molecular weight of the product are easy to adjust to obtain excellent performance. It is prepared by first epoxidizing the organic acid with epichlorohydrin, and then carrying out the ring-opening reaction with the polyamine to covalently combine the product into a certain molecular weight anti-stripping agent molecule. The raw materials are easy to obtain, and the synthesis reaction conditions are mild and convenient. Easy to implement, easy to adjust product structure and molecular weight to obtain excellent performance.

Description

technical field [0001] The invention belongs to the field of building materials and civil engineering materials, in particular to a long-chain alkyl polyamine series asphalt anti-stripping agent capable of improving the bonding ability between asphalt and inorganic minerals and the water damage resistance of the bonding interface and its preparation method . Background technique [0002] Asphalt has a certain degree of cementability, deformability and waterproofness, and has been widely used in engineering, and is widely used in road surface, roofing materials, waterproof sealing and other fields. Asphalt is generally mixed with cheap natural or artificial minerals to achieve better technical economy. Mineral materials can be divided into two categories according to acidity and alkalinity: acidic mineral materials such as quartzite, granite, etc.; alkaline mineral materials such as limestone, marble, etc. Generally, acidic mineral materials are dense, smooth, and high in st...

AI Technical Summary

Problems solved by technology

The first disadvantage is that the viscosity of molten asphalt is greatly increased, which increases the difficulty of processing or construction, such as: for road asphalt mixture, it is necessary to increase the mixing temperature, prolong the mixing time, increase the rolling temperature, etc.; the second is fine powder Large specific surface absorbs a large amount of asphalt, in order to ensure that the hot asphalt coats the mineral material, it is necessary to increase the amount of asphalt

Amides are synthesized by amide chemical reaction of organic acids and organic amines. Generally, high temperature and dehydration under reduced pressure are required. The reaction conditions are relatively harsh, and the hydrolysis resistance is insufficient during use; aldehydes and amines are condensed by organic amines and aldehydes, and the reaction conditions are relatively mild. However, the product is highly polar and has poor compatibility with asphalt; the organic amine salt has a small molecular weight and is volatile when mixed with asphalt at high temperature. It also has a certain water solubility and will migrate and lose during long-term use, reducing the resistance to peeling. Effect

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