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Asphalt emulsifier and preparation method thereof and emulsified asphalt product

An asphalt emulsifier and product technology, applied in the field of composite cold recycling asphalt emulsifier and its preparation, can solve the problems of poor adaptability of asphalt, agglomeration strength of emulsified asphalt mixture, single structure of emulsifier, etc. flexibility, improving affinity, and enhancing the effect of steric hindrance

Active Publication Date: 2017-05-31
天津康泽威科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a cold recycled asphalt emulsifier with good effect, which can make up for the shortcomings of a single cold recycled asphalt emulsifier in terms of emulsifying ability, emulsifying range and emulsion storage stability, and improve the storage stability of emulsified asphalt It solves the technical problems of single emulsifier structure, poor adaptability to asphalt, easy agglomeration of emulsified asphalt mixture and slow strength in the prior art

Method used

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  • Asphalt emulsifier and preparation method thereof and emulsified asphalt product
  • Asphalt emulsifier and preparation method thereof and emulsified asphalt product

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[0030] The present invention also provides the preparation method of the asphalt emulsifier described in the above technical scheme, comprising the following steps:

[0031] Mixing fatty amide, modified alkali lignin and alkylamide betaine to obtain asphalt emulsifier;

[0032] The preparation method of wherein said modified alkali lignin comprises the following steps:

[0033] Trimethylamine hydrochloride is mixed with epichlorohydrin to carry out a substitution reaction to obtain a substitution reaction product;

[0034] The substitution reaction product is mixed with alkali lignin to obtain modified alkali lignin.

[0035] In the present invention, there is no special restriction on the order of addition when the fatty amide, modified alkali lignin and alkylamide betaine are mixed, and the order of addition well known to those skilled in the art can be adopted; in the embodiment of the present invention It is preferred to mix the fatty amide and alkylamide betaine first, ...

Embodiment 1

[0070] Preparation of asphalt emulsifier

[0071] Add 282g of oleic acid into a three-necked flask, add 51.6g of methacrylic acid, 69.1g of ethanol and react at 155°C for 3h, add 2.2g of 98% concentrated sulfuric acid at 80°C for 3h, then add 302.4g of tetraethylenepentamine at 130°C °C for 1 h, distilled to separate the ethanol at the same time, and continued to heat up to 170 °C for 2 h to obtain a fatty amide.

[0072] Add 95.6 g of solid trimethylamine hydrochloride to the three-necked flask, add 63.7 g of water to dilute it into a 60% aqueous solution, add dropwise 92.5 g of epichlorohydrin and react at 30° C. for 1 h to obtain a substitution reaction product. Add 147g of alkali lignin into a three-necked flask, add 147g of water and 15g of solid sodium hydroxide, add 62.9g of a substitution reaction product, and react at 70°C for 2 hours to obtain modified alkali lignin.

[0073] Stir 60 g of fatty amide and 10 g of octadecamidopropyl betaine at 200 rpm for 10 minutes, ...

Embodiment 2

[0078] Preparation of asphalt emulsifier

[0079] Add 280g of oleic acid to a three-necked flask, add 86g of methacrylic acid, 124g of ethylene glycol and react at 170°C for 6h, add 2.8g of p-toluenesulfonic acid at 80°C for 3h, then add 292.5g of triethylenetetramine at 160°C React for 3 hours, distill to separate ethylene glycol at the same time, continue to heat up to 200°C and react for 2 hours to obtain fatty amide.

[0080] Add 95.6 g of solid trimethylamine hydrochloride to the three-necked flask, add 223 g of water to dilute it into a 30% aqueous solution, add dropwise 111 g of epichlorohydrin and react at 60° C. for 3 h to obtain a substitution reaction product. Add 147g of alkali lignin into a three-necked flask, add 147g of water and 15g of solid sodium hydroxide, add 62.9g of a substitution reaction product, react at 90°C for 5h, and obtain modified alkali lignin.

[0081] Stir 30 g of fatty amide and 40 g of lauryl amidopropyl betaine at 500 rpm for 30 minutes, the...

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Abstract

The invention provides an asphalt emulsifier, belonging to the technical field of asphalt pavement cold recycling technology. The asphalt emulsifier comprises the following components by weight percent: 30-60% of fatty acid amide, 10-30% of modified alkali lignin and 10-40% of alkyl amido betaine; the modified alkali lignin is prepared from the following raw materials: trimethylamine hydrochloride, epichlorohydrin and alkali lignin; due to the fatty acid amide, modified alkali lignin and ampholytic surfactant alkyl amido betaine, the range of HLB value is expanded, the affinity of asphalt is improved, the surface activity is higher, and the shortcomings of a single cold-recycling asphalt emulsifier in emulsifying ability, emulsifying range and emulsion storage stability are overcome; the modified alkali lignin enhances the stereo-hindrance effect and improves the storage stability of the emulsified asphalt; the obtained asphalt emulsifier has higher blending flexibility and good compatibility with most stone; and moreover, the working time of the cold-recycling asphalt mixture can be adjusted, and the requirement on different haul distances in practical construction is met.

Description

technical field [0001] The invention relates to the technical field of asphalt pavement cold regeneration, in particular to a composite asphalt emulsifier for cold regeneration and a preparation method thereof. Background technique [0002] Developed countries such as Europe and the United States began to study the cold recycling technology of asphalt pavement as early as the beginning of the 20th century. The recycling rate of old pavement materials in the United States has exceeded 80%. The European Asphalt Association EAPA has announced that the waste asphalt pavement materials of its member countries have passed The regeneration method can be reused. The cold recycling technology of asphalt pavement has been maturely applied abroad, and has become a common technology for road construction and maintenance in developed countries in Europe and America. In recent years, with the rapid development of national highway construction, a large number of highway asphalt pavements ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L95/00C08H7/00
CPCC08H6/00C08J3/03C08J2395/00C08L95/00
Inventor 王杰马名川沈忠良董承静张蕊
Owner 天津康泽威科技有限公司
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