Modified hyperbranched polyamide-amine asphalt emulsifier and preparation method and application thereof

A technology of hyperbranched polyamide and asphalt emulsifier, applied in building components, building insulation materials, buildings, etc., can solve the problems of complex polyethylene polyamine structure, high raw material cost, harsh reaction conditions, etc., to improve construction speed and The effect of reliability, excellent workability, and sufficient mixing time

Inactive Publication Date: 2014-08-13
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a modified hyperbranched polyamide- Am

Method used

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  • Modified hyperbranched polyamide-amine asphalt emulsifier and preparation method and application thereof
  • Modified hyperbranched polyamide-amine asphalt emulsifier and preparation method and application thereof
  • Modified hyperbranched polyamide-amine asphalt emulsifier and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Synthesis of hyperbranched polyamidoamines

[0037] Put 20.8g (0.2mol) of diethylenetriamine in a 250ml three-necked flask, and cool it in an ice-water bath; 2 Under the protection of the atmosphere, use a constant pressure dropping funnel to slowly drop a mixed solution of 17.6g (0.2mol) methyl acrylate and 40ml methanol; after the drop is completed, react at room temperature for 8 hours to obtain a colorless and transparent AB 2 type monomer. Then, the reaction product AB 2 The monomer was transferred to an eggplant-shaped flask of a rotary evaporator, the methanol was distilled off under reduced pressure, the temperature was raised to 140°C, the reaction under reduced pressure was continued for 3 hours, and the reaction was stopped to obtain a viscous light yellow liquid. Precipitated by acetone, filtered, separated, and then vacuum-dried at 40°C for 48 hours to obtain a yellow viscous product. Concrete reaction process is as follows:

[0038]

[0039] The...

Embodiment 2-3 and comparative Embodiment 3-5

[0083] Using diethylenetriamine (DETA) and methyl acrylate (MA) as raw materials, a Michael addition reaction occurs to obtain AB 2 type monomer. Investigate the impact of raw material feed ratio on the final product, under the conditions of reaction temperature of 40°C and reaction time of 8h, change the feed ratio, the feed amount of embodiment 2-3 and comparative example 3-5, test the final polymer Viscosity, primary amine value, total amine value, as shown in the following table:

[0084]

[0085] From the test results in the above table, it can be seen that when the feeding ratio of diethylenetriamine and methyl acrylate is 1:1.2, the viscosity of the system is relatively high, which can correspondingly indicate that there are more monomers undergoing polycondensation reaction and the molecular weight is larger; the feeding ratio is 1 :1, the product viscosity and amine value are slightly smaller; and when the feed ratio is 1:2 and 1:1.5, the system gels; when the fee...

Embodiment 4

[0088] Get AB in embodiment 1 2 10g of the type monomer is placed in an eggplant-shaped bottle, the temperature is raised to cause its own melting polycondensation reaction, and the change process of the infrared spectrum of the reaction system is tested. image 3 It is the infrared spectrogram of the product after the melt polycondensation reaction for 1 hour under different temperature conditions, where line 1 is the polymerization reaction at 80°C, line 2 is the polymerization reaction at 120°C, and line 3 is at 140°C Polymerization. It can be seen from the figure that there is already a certain amount of amide bonds at 80°C (amide I 1645cm -1 , amide II 1559cm -1 ) appear, and with time and temperature changes, the ester bond (at 1720cm -1 left and right) gradually decrease, and the amide bond gradually strengthens. Moreover, after one hour at 140°C, the ester bond has basically disappeared, and in the subsequent reaction, there is basically no change in the infrared, ...

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Abstract

The invention discloses a modified hyperbranched polyamide-amine asphalt emulsifier and a preparation method and application thereof. The preparation method comprises the following steps: (1) an AB2 type monomer is synthesized by Michael addition reaction between diethylenetriamine and methyl acrylate, and the molar ratio of diethylenetriamine to methyl acrylate is (1:1)-(1:1.2); (2) hyperbranched polyamide-amine is synthesized by self melt polycondensation reaction of the AB2 type monomer; and (3) amidation reaction between the hyperbranched polyamide-amine and oleic acid is performed, the molar ratio of hyperbranched polyamide-amine to oleic acid is (1:1)-(1:1.2). The modified hyperbranched polyamide-amine as an asphalt emulsifier can meet hydrophilic lipophilic balance value demand, and significantly reduces the critical micelle concentration value, and prepared asphalt emulsion is fine and uniform in particle, and can meet the requirements on storage stability, particle size and weight of screen residue.

Description

technical field [0001] The invention relates to the field of hyperbranched polyamidoamines, in particular to modified hyperbranched polyamidoamines, asphalt emulsifiers, preparation methods and applications thereof. Background technique [0002] Slow-cracking asphalt emulsifier is a commonly used mixing emulsifier. Since asphalt has a certain fluidity only under high temperature conditions, there will be certain harmful gas emissions in the process of high temperature operation, which is not conducive to safety, energy saving and environmental protection. Therefore, emulsified asphalt has certain advantages and wider application in specific construction. universality. As the construction technology of cold asphalt, emulsified asphalt has been recognized by the world's road and construction fields. my country has entered a stage of rapid development since the 1980s. In emulsified asphalt, asphalt particles are uniformly dispersed in an aqueous solution containing an emulsif...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08L95/00C08J3/03
Inventor 王利民耿晓晨吴德龙马云容李立勇田禾余建军刘晓然张梦如
Owner EAST CHINA UNIV OF SCI & TECH
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