Slow-breaking quick-setting asphalt emulsifier, preparation method and application thereof

An asphalt emulsifier, slow cracking and fast setting technology, used in building components, building insulation materials, buildings, etc.

Inactive Publication Date: 2012-07-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of slow-cracking and fast-setting emulsifiers reported in the above literature or patents is complicated, which will increase the cost and have poor storage stability.
[0005]According to the needs of slow-cracking and fast-setting projects, emulsifiers are often compounded. Non-ionic asphalt emulsifiers can delay the demulsification time of asphalt mixtures. At present, most of them will Nonionic emulsifiers are used in combination with anionic and cationic emulsifiers, but this method is complicated and will be gradually eliminated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In a 250 mL four-neck flask equipped with a stirrer, a thermometer and a reflux condenser, add 18.0 mL (0.05 mol) of the trimethylamine hydrochloride aqueous solution obtained above, and add 3.9 mL (0.046 mol) of epichlorohydrin dropwise while stirring , after stirring evenly for 10 minutes, add 2mol / L NaOH 5mL (0.01mol) dropwise, drop it over in 30 minutes, slowly raise the temperature to 50°C, and react at constant temperature for 4 hours to obtain a quaternary ammonium salt intermediate (0.046mol).

[0037] In the above intermediate (0.046mol), add 56.056 g (0.05mol) nonylphenol polyoxyethylene ether (15), phase transfer catalyst tetrabutylammonium bromide 1.0g (0.003mol), solvent ethanol 10mL (0.17mol ), heated to 70°C, stirred rapidly, and refluxed for 3h. That is, the cationic asphalt emulsifier is obtained and used as emulsified asphalt.

[0038] 2. Preparation of emulsified asphalt:

[0039] Preparation of soap solution: add the asphalt emulsifier obtained abo...

Embodiment 2

[0045] Example 3

[0046] Except adding 111.12 g (0.05 mol) nonylphenol polyoxyethylene ether (40) to replace 56.056 g nonylphenol polyoxyethylene ether (15) in the quaternary ammonium salt type intermediate (0.046mol), the others are the same as in Example 1 . The obtained cationic asphalt emulsifier is used as emulsified asphalt.

Embodiment 3

[0048] Example 4

[0049] Except adding 51.57 g (0.046 mol) nonylphenol ethoxylate (15) or 140.14 g (0.125 mol) nonylphenol ethoxylate (15) to the quaternary ammonium salt intermediate (0.046 mol) instead of 56.056 g Nonylphenol polyoxyethylene ether (15) is the same as in Example 1. The obtained cationic asphalt emulsifier is used as emulsified asphalt. The emulsification effect is good, and the storage stability reaches more than 5 days.

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PUM

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Abstract

The invention discloses a slow-breaking quick-setting asphalt emulsifier, a preparation method and application thereof. The emulsifier is prepared through the following steps: dripping epoxy chloropropane into a reactor filled with tertiary amines at low temperature, raising the temperature of the obtained mixture to 20-50 DEG C and then carrying out reaction on the obtained mixture for 3-6 hoursso as to obtain a quaternary ammonium salt intermediate (namely, epoxy propyl-trimethyl ammonium chloride), wherein the ratio of the epoxy chloropropane to the tertiary amine is 1:(0.9-2); then, adding alkylphenol ethoxylates, a solvent and a catalyst into the obtained intermediate, raising the temperature of the obtained mixture to 50-80 DEG C and then carrying out reaction on the obtained mixture for 3-5 hours so as to obtain a target product (namely, a polyoxyethylene type cationic slow-breaking quick-setting cation asphalt emulsifier), wherein the molar ratio of the intermediate to the alkylphenol ethoxylates to the solvent to the catalyst is 1: (1-2.5):(0-4.0):(0.003-0.5). Compared with raw materials (polyamines) of the current slow-breaking emulsifiers, a product of the slow-breaking quick-setting asphalt emulsifier disclosed by the invention is cheaper; the product is uniform and stable, and has no adverse effect on asphalt properties; and the slow-breaking quick-setting asphalt emulsifier is wide in applicability, and can achieve a slow-breaking quick-setting construction effect.

Description

technical field [0001] The invention relates to the preparation and application of an asphalt emulsifier, in particular to a slow-cracking and fast-setting cationic asphalt emulsifier and its preparation method and application. Background technique [0002] Most of the asphalt emulsifiers used at home and abroad are cationic quaternary ammonium salt asphalt emulsifiers. The types of emulsified asphalt obtained from them mainly include: fast-cracking and fast-setting type, slow-cracking and slow-setting type, slow-cracking and medium-setting type, slow-cracking and medium-setting type, and Fast-setting type. Among them, the slow-cracking and fast-setting type is used for the slurry seal layer, which plays a good role in the prevention and maintenance of the road surface, so it has attracted much attention. [0003] As far as the types of asphalt emulsifiers commonly used in roads in my country are concerned, there are two ways to obtain both slow-cracking and fast-setting em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L95/00C08G65/00
Inventor 王月欣张彤张倩罗生明翟赫
Owner HEBEI UNIV OF TECH
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