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Dicationic amide type asphalt emulsifier and preparation method therefor

A kind of asphalt emulsifier, dication technology, applied in the field of dication amide type asphalt emulsifier and its preparation, can solve the problems of high temperature reaction, high temperature reaction, high cost, etc., to achieve improved emulsification performance, good storage stability and low production cost low effect

Inactive Publication Date: 2016-03-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the preparation steps are cumbersome, the cost is high, and high temperature reaction is required
U.S. Patents USP5019168 and USP4990591 disclose a series of asphalt emulsifiers synthesized by reacting dodecylphenol with aminoethylpiperazine, but the reaction raw materials described in the patents are not easy to obtain, and the cost of developing such asphalt emulsifiers is relatively high
[0005] The general disadvantages of the above cationic asphalt emulsifiers and their preparation methods are: the cost of raw materials for the preparation of emulsifiers is high, the sources are limited, high temperature reactions are required during preparation, and the requirements for production and experimental equipment are relatively high

Method used

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  • Dicationic amide type asphalt emulsifier and preparation method therefor
  • Dicationic amide type asphalt emulsifier and preparation method therefor
  • Dicationic amide type asphalt emulsifier and preparation method therefor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of dicationic amide type asphalt emulsifier:

[0032] 1) Add 269.5g octadecylamine, 260g isopropanol in the reactor, heat and stir to dissolve. Then 145.7 g of acrylamide was added dropwise, and the reaction was stirred at 70° C. for 3 h.

[0033] The above synthetic product was separated and purified by recrystallization and then detected by FTIR. The results are as follows: 3371cm -1 and 3205cm -1 The N-H stretching vibration absorption peak at 2916cm -1 and 2850cm -1 The asymmetric and symmetric stretching vibration absorption peaks of methylene respectively, 1666cm -1 It is the amide group C=O stretching vibration absorption peak, 1471cm -1 is the asymmetric bending vibration of methylene, 1417cm -1 is the asymmetric bending vibration of the methyl group, 1263cm -1 and 1128cm -1 C-N stretching vibration absorption peak, 717cm -1 It is the in-plane rocking vibration of methylene, 669cm -1 is the N-H out-of-plane deformation vibration of the ...

Embodiment 2

[0043] (1) Preparation of dicationic amide type asphalt emulsifier:

[0044] 1) Add 269.5g octadecylamine, 260g isopropanol in the reactor, heat and stir to dissolve. Then 145.7 g of acrylamide was added dropwise, and the reaction was stirred at 70° C. for 3 h.

[0045] 2) Add 109.1 g of triethylamine into the reactor, gradually add 131.2 g of 30% industrial hydrochloric acid, then gradually add 97.1 g of epichlorohydrin, stir and react at 35° C. for 2 h, and obtain reaction intermediate B. The prepared reaction intermediate B was added dropwise to the synthesis product in step 1) above, and stirred at 65° C. for 3 h. The dicationic amide type asphalt emulsifier was obtained, which was reserved for the emulsified asphalt test.

[0046] After recrystallization, separation and purification of the prepared dicationic amide type asphalt emulsifier, FTIR detection is carried out, and the results are as follows: 3298cm -1 The stretching vibration absorption peak of O-H is at 3157...

Embodiment 3

[0054] (1) Preparation of dicationic amide type asphalt emulsifier:

[0055] 1) Add 269.5g octadecylamine, 260g isopropanol in the reactor, heat and stir to dissolve. Then 145.7 g of acrylamide was added dropwise, and the reaction was stirred at 65° C. for 4 h.

[0056] 2) Add 189.6g of 85% triethanolamine to the reactor, gradually add 131.2g of 30% industrial hydrochloric acid, then gradually add 97.1g of epichlorohydrin, stir and react at 30-70°C for 2h, and obtain reaction intermediate C. The prepared reaction intermediate C was added dropwise to the synthesis product in step 1) above, and stirred at 70° C. for 2 h. The dicationic amide type asphalt emulsifier was obtained, which was reserved for the emulsified asphalt test.

[0057] After recrystallization, separation and purification of the prepared dicationic amide type asphalt emulsifier, FTIR detection is carried out, and the results are as follows: 3377cm -1 O-H stretching vibration absorption peak at 3159cm -1 Th...

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Abstract

The invention discloses a dicationic amide type asphalt emulsifier, the molecular structure of which is represented by a formula, wherein R is a methyl group (-CH3), an ethyl group (-C2H5) or an alcoholic group (-C2H4OH); The emulsifier is prepared from the following raw materials in a following molar ratio: octadecylamine: an alcohol solvent: acrylamide: low carbon number tertiary amine: technical hydrochloric acid: epichlorohydrin=1mol:(4.00-9.00)mol:(2.00-2.10)mol:(1.02-1.10)mol:(1.02-1.10)mol:(1.02-1.08)mol. The dicationic amide type asphalt emulsifier disclosed by the invention is easily available in synthetic raw materials, low in production cost, simple in process and free of high-temperature reactions. The emulsifier can be used for emulsifying asphalt in various different types and the prepared emulsified asphalt is fine and smooth and uniform and good in storage stability. The emulsifier can be used for prepare rapid type cationic emulsified asphalt.

Description

technical field [0001] The invention relates to a dicationic amide type asphalt emulsifier and a preparation method thereof, belonging to the technical field of fine chemicals. Background technique [0002] Emulsified asphalt is an oil-in-water liquid asphalt emulsion formed by asphalt and water under the action of an emulsifier. Emulsified asphalt is mainly divided into cationic emulsified asphalt, anionic emulsified asphalt and nonionic emulsified asphalt. Among them, cationic emulsified asphalt is widely used in road construction and road maintenance due to its energy-saving and environmental protection, can improve construction conditions, has strong adhesion to stone materials, and can effectively reduce over-aging of asphalt and many other excellent application characteristics. [0003] The most critical factor affecting the road performance of emulsified asphalt is the asphalt emulsifier. At present, the main varieties of cationic asphalt emulsifiers at home and abro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/02C08L95/00C07C231/12C07C237/06
CPCC07C231/12C07D301/27C07D303/36C08J3/02C08J2395/00C08L95/00C07C237/06
Inventor 施来顺马存飞陈孟
Owner SHANDONG UNIV
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