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Amphoteric tertiary amide type asphalt emulsifier and preparation method thereof

A technology of asphalt emulsifier and tertiary amide type, which is applied in the field of amphoteric tertiary amide type asphalt emulsifier and its preparation, which can solve the problems that are difficult to meet the application of crushed stone seal layer, and achieve convenient mixing and uniformity, increase hydrophilicity, and convenient metering The effect of feeding

Inactive Publication Date: 2017-06-13
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amphoteric betaine-type asphalt emulsifier is prepared as a cationic emulsified asphalt, which is difficult to meet the application of crushed stone seal and chip seal.

Method used

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  • Amphoteric tertiary amide type asphalt emulsifier and preparation method thereof
  • Amphoteric tertiary amide type asphalt emulsifier and preparation method thereof
  • Amphoteric tertiary amide type asphalt emulsifier and preparation method thereof

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preparation example Construction

[0051] In one embodiment of the present application, the present invention provides the preparation method of above-mentioned amphoteric tertiary amide type asphalt emulsifier, comprising the following steps:

[0052] (1) Add octadecylamine into the reaction vessel, add alcohol solvent, heat and stir to dissolve, then add N,N-dimethylacrylamide in batches, after the addition, stir and react at 60-80°C for 2-4h , to obtain reaction intermediate I; the molecular formula of reaction intermediate I is C 18 h 37 N(CH 2 CH 2 CON(CH 3 ) 2 ) 2 .

[0053] (2) Add 28-38% (mass fraction) aqueous solution of sodium chloroacetate to the reaction intermediate I in batches, and react at 60-80° C. for 2-7 hours to obtain an amphoteric tertiary amide type asphalt emulsifier.

[0054] As a preferred embodiment, the molar ratio of octadecylamine, alcohol solvent, N,N-dimethylacrylamide, and sodium chloroacetate is 1mol: (4.00-9.00)mol: (2.00-2.10)mol: (1.02- 1.10) mol.

[0055] After a ...

Embodiment 1

[0065] (1) Preparation of amphoteric tertiary amide type asphalt emulsifier:

[0066] 1) Add 269.5g octadecylamine, 260g isopropanol in the reactor, heat and stir to dissolve. Then, 203.2 g of N,N-dimethylacrylamide was gradually added, and the reaction was stirred at 70°C for 3 h.

[0067] The above synthetic intermediate product was separated and purified by recrystallization and then detected by FTIR. The results are as follows: 2910cm -1 It is the asymmetric stretching vibration absorption peak of methylene, 2840cm -1 Closed peak for the symmetrical stretching vibration of methylene, 1650cm -1 and 1625cm -1 It is the C=O stretching vibration absorption peak in the amide group, 1460cm -1 is the asymmetric bending vibration of methylene, 1390cm -1 is the asymmetric bending vibration of the methyl group, 1263cm -1 and 1153cm -1 C-N stretching vibration absorption peak, 777cm -1 and 719cm -1 It is the in-plane rocking vibration absorption peak of methylene.

[0068] ...

Embodiment 2

[0078] (1) Preparation of amphoteric tertiary amide type asphalt emulsifier:

[0079] 1) Add 269.5g octadecylamine and 260g absolute ethanol in the reactor, heat and stir to dissolve. Then, 203.2 g of N,N-dimethylacrylamide was gradually added, and the reaction was stirred at 70°C for 3 h.

[0080] 2) Dissolve 42.4g of sodium hydroxide in 80.0g of water to obtain an aqueous solution of sodium hydroxide, dissolve 100.2g of chloroacetic acid in 200.0g of water to obtain an aqueous solution of chloroacetic acid; add the aqueous solution of sodium hydroxide dropwise to an aqueous solution of chloroacetic acid to obtain an aqueous solution of sodium chloroacetate . The prepared sodium chloroacetate aqueous solution was added dropwise to the product synthesized in step 1) above, and stirred at 75° C. for 3 h. The obtained amphoteric tertiary amide type asphalt emulsifier was reserved for the emulsified asphalt test.

[0081] (2) Preparation of emulsified asphalt:

[0082] Take 3...

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Abstract

The invention discloses an amphoteric tertiary amide type asphalt emulsifier. The molecular structural formula is as shown in the description. The amphoteric tertiary amide type asphalt emulsifier is prepared from the raw materials according to the molar ratio: octadecylamine, an alcohol solvent, N,N-dimethylacrylamide and sodium chloroacetate, wherein the molar ratio is 1mol:(4.00-9.00)mol:(2.00-2.10)mol:(1.02-1.10)mol. The novel amphoteric tertiary amide type asphalt emulsifier is prepared by taking the N,N-dimethylacrylamide as a reaction raw material of the asphalt emulsifier for the first time. The amphoteric tertiary amide type asphalt emulsifier has a high emulsifying property, each performance index of emulsified asphalt prepared by the asphalt emulsifier is excellent, various kinds of asphalt with different model numbers can be emulsified, and the prepared emulsified asphalt is fine and uniform and has an excellent aggregate attaching property.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to an amphoteric tertiary amide type asphalt emulsifier and a preparation method thereof. Background technique [0002] An emulsifier is an amphiphilic molecule composed of a non-polar hydrophobic group and a polar hydrophilic group. This structure makes the emulsifier form a directional and dense arrangement on the surface (interface) of the solution, changing the surface (interface) of the system. Surface chemistry. When the concentration of the emulsifier exceeds its critical micelle concentration CMC, the surface (interface) surface tension is reduced to the minimum, so that it has the functions of emulsification, defoaming, and dispersion. application. [0003] According to the different properties of the hydrophilic group of the emulsifier, the emulsifier is divided into anionic type, cationic type, zwitterionic type, nonionic emulsifying type and compound...

Claims

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Application Information

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IPC IPC(8): C07C237/06C07C231/12C08J3/03C08L95/00
CPCC07C231/12C07C237/06C08J3/03C08J2395/00C08L95/00
Inventor 施来顺马存飞侯璐孔静文孙亚丽
Owner SHANDONG UNIV
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