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Process for preparing non-amine asphalt antistripping agent with amphiprotic activity

A technology of anti-stripping agent and production method, applied in the direction of organic chemistry, etc., can solve the problems of difficult to stabilize the performance of asphalt mixture, high cost, difficult operation, etc., to improve the performance of water damage resistance, prolong the service life, and the production method simple effect

Inactive Publication Date: 2009-08-19
江苏文昌新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The measures and methods currently adopted are: ① use part of lime or cement instead of mineral powder, and use ultrasonic waves to activate aggregates, but the operation is difficult and the cost is high
②A cationic amine or metal soap asphalt anti-stripping agent is used. In this way, although the adhesion problem between asphalt and acidic stones is solved, the problem of cationic asphalt anti-stripping agent and alkaline stones repels each other, making the asphalt The performance of the mixture is difficult to stabilize

Method used

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  • Process for preparing non-amine asphalt antistripping agent with amphiprotic activity
  • Process for preparing non-amine asphalt antistripping agent with amphiprotic activity

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Into a 4-neck detachable glass flask equipped with a stirrer, a thermometer, a reflux condenser and a nitrogen inlet, 470 parts of soyoleic acid, 60 parts of ethylenediamine and 40 parts of ethylene polyamine were added, followed by stirring. Heating while stirring and feeding nitrogen, when the temperature rises to 100-120°C, after 3-4 hours of reaction from the beginning, then continue to heat up to 160-180°C, react for 2-3 hours, after cooling, A non-amine asphalt anti-stripping agent with amphoteric activity is obtained.

Embodiment 2

[0020] 370 parts of coconut oleic acid and 95 parts of aniline were added to a 4-neck detachable glass flask equipped with a stirrer, thermometer, reflux condenser and nitrogen inlet, and then heated while stirring and feeding nitrogen. When the temperature rises to 100-120°C, after 2-3 hours of reaction from the beginning, then continue to heat up to 160-180°C, and react for 2-3 hours during this process. Exfoliating agent.

Embodiment 3

[0022] Add 200 parts of soybean oleic acid and 200 parts of tallow oleic acid, 23 parts of aniline and 75 parts of polyethylene polyamine into a 4-neck detachable glass flask equipped with a stirrer, thermometer, reflux condenser and nitrogen inlet, and then It heated while stirring and feeding nitrogen gas. When the temperature rises to 100-120°C, react for 2-3 hours from the beginning, then continue to heat up to 160-180°C, react for 3-4 hours, and after cooling, a non-amine asphalt anti-stripping agent with amphoteric activity is obtained .

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Abstract

The invention discloses a manufacturing method of an asphalt anti-stripping agent which has amphiprotic activity and contains no amine. The manufacturing method is characterized by employing the following formula and manufacturing process flow: a. formula: 20-80 parts of oleic acid by weight and 5-40 parts of amine by weight; and b. manufacturing process flow: adding the oleic acid and the amine to a reaction vessel according to weight ratio, heating to the temperature of 100-120 DEG C while stirring and introducing nitrogen, reacting for 2-4h, continuing to stir and heating to the temperature of 160-180 DEG C, reacting for 2-4h, and cooling to obtain the asphalt anti-stripping agent which has amphiprotic activity and contains no amine. The method overcomes the disadvantages of difficult former operation, high cost and unstable performances of asphalt mixtures due to repulsion between cationic asphalt anti-stripping agents and alkali stones. The manufacturing method is simple, and the asphalt anti-stripping agent manufactured by the method can greatly improve the moisture damage resistance of asphalt pavement, prolong the service life of asphalt pavement, and reduce the maintenance cost.

Description

technical field [0001] The invention relates to a preparation method of an asphalt additive, in particular to a preparation method of a non-amine asphalt anti-stripping agent with amphoteric activity. Background technique [0002] The existing expressway is often caused by early water damage due to the insufficient water stability of asphalt concrete, and the road surface will appear potholes and looseness after 2-3 years of use. Water damage, like ruts and cracks, has become the main damage factor of asphalt pavement. The water damage mechanism of asphalt pavement is that the asphalt film peels off from the surface of the aggregate (stone). Adhesion; ②Under repeated loads, the asphalt film gradually begins to peel off from the surface of the aggregate; ③With the further intrusion of water, the aggregate begins to loosen and drop particles; ④Finally, the water damage on the asphalt pavement develops into grooves. There are two ways to prevent water damage: one is to reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D249/04C04B24/12
Inventor 苏文国周晓龙
Owner 江苏文昌新材料科技有限公司
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