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Method for preparing asphalt low-temperature regulating agent based on tetradecane/tetradecanol/melamine-modified urea formaldehyde resin

A technology of melamine and urea-formaldehyde resin, which is used in the preparation of asphalt temperature-regulating agents and low-temperature temperature-regulating agents, can solve problems such as road surface corrosion, surrounding water body damage, and secondary pollution, and achieve low cost, broad prospects, and synthetic The effect of simple process

Inactive Publication Date: 2018-06-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used deicing agents include chlorine-salt deicing agents (such as sodium chloride, calcium chloride) and non-chlorinated deicing agents (such as potassium acetate, sodium formate), both of which are dependent on ambient temperature changes And wheels assist rolling, and after the snow melts, a large amount of inorganic salts will remain, causing damage to the surrounding water body, and may even cause road surface corrosion and secondary pollution
In summary, there is currently no method that can achieve efficient snow melting and ice melting while protecting the ecological environment; therefore, the development of new snow melting and ice melting methods is of great significance

Method used

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  • Method for preparing asphalt low-temperature regulating agent based on tetradecane/tetradecanol/melamine-modified urea formaldehyde resin
  • Method for preparing asphalt low-temperature regulating agent based on tetradecane/tetradecanol/melamine-modified urea formaldehyde resin
  • Method for preparing asphalt low-temperature regulating agent based on tetradecane/tetradecanol/melamine-modified urea formaldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 3.78 g of melamine and 4.20 g of urea into a 250 mL three-neck flask, add 20.7 g of formaldehyde solution (37%) and an appropriate amount of deionized water, adjust the pH value to 9 with triethanolamine, and place the flask at 70 ℃ oil bath, mix well under mechanical stirring, and start pre-polymerization. At this temperature, keep the rotating speed of 400 r / min for about 1 h until the prepolymer is clear and transparent;

[0029] (2) Weigh 1.0 g of sodium dodecylbenzenesulfonate and add it to a 50 mL beaker, add 19.8 g of n-tetradecane and 5.4 g of tetradecyl alcohol, and finally add an appropriate amount of deionized water. Make it evenly mixed to form a relatively uniform emulsified solution;

[0030] (3) Place the prepared emulsified solution in an oil bath at 70 °C and stir at a speed of 400 r / min. At the same time, add 1.2 g of ammonium chloride and 1.2 g of resorcinol. After they are fully dissolved, use After adjusting the pH value to 4 with formic...

Embodiment 2

[0034] Example 2: Same as Example 1, but the amount of melamine in step (1) was changed to 3.0 g, the amount of urea was changed to 3.2 g, and the amount of formaldehyde solution (37%) was changed to 15.0 g.

Embodiment 3

[0035] Embodiment 3: Same as Embodiment 1, but the triethanolamine in step (1) is changed to ammonia water, and the pH value is adjusted to 9.5.

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Abstract

The invention relates to a method for preparing a temperature regulating agent using tetradecane / tetradecanol / melamine-modified urea formaldehyde resin as a temperature control material. The method comprises mixing n-tetradecane and tetradecanol at a certain ratio, coating the mixture with melamine / urea / formaldehyde resin through an appropriate emulsifier to obtain microcapsules, and re-coating the microcapsules with a high temperature-resistant phenolic-modified epoxy resin to obtain a temperature self-regulating material for asphalt. The microcapsules have the maximum endothermic value of 112.7 J / g at 4.5 DEG C. The asphalt temperature self-regulating material containing 30% by mass of the microcapsules has the maximum endothermic value of 23.62 J / g at 5.58 DEG C. The temperature regulating agent utilizes recyclable production resources, has a low waste rate and a certain mechanical performances, replaces a part of aggregates in asphalt and has a proper temperature adjustment interval. The method has the advantages of simple processes, low cost, environmental friendliness and wide application prospect.

Description

technical field [0001] The invention belongs to the field of new materials and traffic roads, and is a method for preparing a temperature-regulating agent for asphalt, in particular to a low-temperature temperature-regulating based on tetradecane / tetradecyl alcohol / melamine modified urea-formaldehyde resin / high-temperature-resistant epoxy resin The preparation method of the agent. Background technique [0002] Asphalt pavement has low water permeability, smooth surface, easy construction, and wide application. It has the characteristics of stability, low noise, and comfort during use. According to statistics, the utilization rate of asphalt concrete pavement is about 28% in my country's current road pavement, and its utilization rate in expressway pavement is more than 90% [Shen Jin'an. A summary of foreign asphalt pavement design methods [M]. Beijing: People's Communications Publishing House, 2004]. [0003] However, while asphalt pavement is widely used, there are still a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 杨正龙陈赛
Owner TONGJI UNIV
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