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Preparation method of asphalt release agent

A technology of release agent and asphalt, which is applied in the field of material science, can solve the problems of high mobility and poor release effect of asphalt release agent, and achieve the effect of simple process, novel preparation method and low cost

Inactive Publication Date: 2013-02-27
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects of poor demoulding effect and high mobility after demoulding of the asphalt release agent in the prior art, the invention provides a method for preparing an asphalt release agent with excellent demoulding performance and environmental friendliness

Method used

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  • Preparation method of asphalt release agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Taking 9.45 g of chloroacetic acid as raw material, the method for preparing asphalt release agent is realized by the following steps:

[0020] (1) Preparation of chloroacetic acid association liquid

[0021] Weigh 9.45 g of chloroacetic acid and add it to 28.35 g of ethanol and dissolve it with slight heat at 50 °C. The mass ratio of chloroacetic acid to ethanol is 1:3, and reflux at 80 °C for 3 hours to obtain a chloroacetic acid association liquid.

[0022] (2) Preparation of asphalt release agent

[0023] Measure 15.12 g of ethylenediamine into a 100 mL three-necked flask, pass through nitrogen protection, place the three-necked flask in an ice-water bath, place the chloroacetic acid association solution in a 50 mL dropping funnel, and add 18 drops / min Drop it into the three-necked flask at a speed of 1:1.6, that is, the mass ratio of chloroacetic acid to ethylenediamine is 1:1.6, stir evenly with a magnetic force, and react at 5 °C for 6 hours to obtain an asphalt...

Embodiment 2

[0025] Taking 9.45 g of chloroacetic acid as raw material, the method for preparing asphalt release agent is realized by the following steps:

[0026] (1) Preparation of chloroacetic acid association liquid

[0027] Weigh 9.45 g of chloroacetic acid and add it to 23.63 g of ethanol and dissolve it with slight heat at 50 °C. The mass ratio of chloroacetic acid to ethanol is 1:2.5, and reflux at 80 °C for 3 hours to obtain a chloroacetic acid association liquid.

[0028] (2) Preparation of asphalt release agent

[0029] Measure 11.34 g of ethylenediamine and place it in a 100 mL three-necked flask, protect it with nitrogen, place the three-necked flask in an ice-water bath, put the chloroacetic acid association liquid in a 50 mL dropping funnel, and add 18 drops / Drop it into a three-necked flask at a speed of 1 minute, that is, the mass ratio of chloroacetic acid to ethylenediamine is 1:1.2, stir evenly with a magnetic force, and react at 5 °C for 6 hours to obtain a white tra...

Embodiment 3

[0031] Taking 9.45 g of chloroacetic acid as raw material, the method for preparing asphalt release agent is realized by the following steps:

[0032] (1) Preparation of chloroacetic acid association liquid

[0033] Weigh 9.45 g of chloroacetic acid and add it to 37.80 g of ethanol and dissolve it with slight heat at 50 °C. The mass ratio of chloroacetic acid to ethanol is 1:4, and reflux at 80 °C for 3 hours to obtain a chloroacetic acid association liquid.

[0034] (2) Preparation of asphalt release agent

[0035] Measure 18.90 g of ethylenediamine into a 100 mL three-necked flask, pass through nitrogen protection, place the three-necked flask in an ice-water bath, place the chloroacetic acid association solution in a 50 mL dropping funnel, and add 18 drops / min Drop it into a three-necked flask at a speed of 1:2, that is, the mass ratio of chloroacetic acid to ethylenediamine is 1:2, stir evenly with a magnetic force, and react at 5 °C for 6 hours to obtain a white transpar...

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Abstract

The preparation method of an asphalt release agent of the present invention prepares a long-lasting environmental-friendly asphalt release agent through an ice water bath reaction of chloroacetic acid and ethylenediamine in an ethanol system under a certain process condition. The asphalt release agent is a associated liquid system of a Bola-type nitrogen-containing surface active agent of ethylenediamine diacetic acid and ethanol, can form a layer of non-migrating type micron grade film on a mold surface, and can play a corrosion preventive role on a metallic mold, and can naturally alienate the film surface through the interface interaction on encountering lyophobic asphalt, so as to achieve the effect of demolding. The asphalt release agent is not only able to solve the problems of asphalt demolding difficulties, asphalt use performance affected by the releasing agent, and high migration rate of the release agent after demolding, but has long-lasting and environment-friendly excellent performances. The asphalt release agent is innovative in the preparation method, simple in process and low in cost, and can be applied to the fields of processing, transportation, building materials, and water conservancy.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a preparation method of a long-acting and environment-friendly asphalt release agent which can be used in engineering fields such as processing, transportation, building materials, and water conservancy. Background technique [0002] The release agent is a functional substance between the mold and the sample. It is used as an interface film layer on the surface of two objects that are easy to bond to each other. It is a type of processing aid that prevents the sample from bonding to the mold. The mold release agent is used as a material for coating on the surface of the mold. It has a very low surface energy and can form a micron-scale thickness and thermally stable film layer on the mold surface, which can quickly and easily detach the molded sample, and the mold release agent does not contain Any component that affects the quality of the sample. [0003] In recent y...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/16C07C227/08B29C33/60
Inventor 陈亚勺张冬梅刘福亮向豪熊涛王晓娟
Owner SHAANXI NORMAL UNIV
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