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Preparation method of multifunctional asphalt stripping agent

A stripping agent and multi-functional technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of harsh synthesis conditions, poor hydrolysis resistance, poor compatibility of asphalt, etc., achieve mild synthesis process conditions and prolong service life , anti-aging effect

Active Publication Date: 2019-06-14
盘锦辽河油田大力集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amide synthesis conditions are relatively harsh and have poor hydrolysis resistance; aldehyde-amine condensation reaction conditions are mild, but their compatibility with asphalt is poor; organic ammonium salts are volatile and soluble in water due to their small molecular weight when mixed with asphalt, resulting in ingredient loss

Method used

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  • Preparation method of multifunctional asphalt stripping agent
  • Preparation method of multifunctional asphalt stripping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] High purity N 2 Under protection, diethylenetriamine (51.59g, 0.5mol) was placed in a 250ml three-necked flask, and methyl acrylate (47.36g, 0.55mol) and methanol (35.23g, 1.1mol) were added dropwise with a constant pressure funnel. The mixed solution was mechanically stirred at 0°C and added dropwise for 2 hours. After the dropwise addition was completed, it was stirred at room temperature for 3 hours to obtain a light yellow transparent liquid, which was placed in a rotary evaporator, and methanol was removed at 45°C and -0.85MPa until no methanol flowed out. , continue to heat up to 145 ° C, -0.85 MPa polycondensation reaction for 3 hours, and finally get 75.58 g of yellow viscous liquid NH 2 -HBP;

[0039] Take 4.500g of wheatgrass alkali lignin and add it into 9g of water and stir to dissolve it, and make it into an aqueous solution of wheatgrass alkali lignin, which is recorded as solution A; take the above 15.00g of NH 2 -HBP is added with 41.00g water and stir...

Embodiment 2

[0042] High purity N 2 Under protection, triethylenetetramine (73.12g, 0.5mol) was placed in a 250ml three-necked flask, and methyl acrylate (51.66g, 0.6mol) and (methanol 38.44g, 1.2mol) were added dropwise with a constant pressure funnel. The mixed solution was mechanically stirred at 0°C and added dropwise for 2 hours. After the dropwise addition was completed, it was stirred at room temperature for 4 hours to obtain a light yellow transparent liquid, which was placed in a rotary evaporator, and methanol was removed at 50°C and -0.85MPa until no methanol flowed out. Continue to heat up to 145 ° C, -0.85 MPa polycondensation reaction for 4 hours, and finally obtain 87.58 g of yellow viscous liquid NH 2 -HBP;

[0043] Take 6.00g of wheatgrass alkali lignin and add it into 15g of water and stir to dissolve it, and make it into an aqueous solution of wheatgrass alkali lignin, which is recorded as solution A; take the above 15.00g of NH 2 -HBP is added with 30.00g water and st...

Embodiment 3

[0046] Under nitrogen protection, ethylenediamine (30.05g, 0.5mol) was placed in a 250ml three-necked flask, and methyl acrylate (47.328g, 0.58mol) and methanol (37.15g, 1.16mol) were added dropwise with a constant pressure funnel The mixed solution was mechanically stirred at 0°C and added dropwise for 2 hours. After the dropwise addition was completed, it was mechanically stirred at room temperature for 5 hours to obtain a light yellow transparent liquid, which was placed in a rotary evaporator, and methanol was removed at 45°C and -0.85MPa until no methanol flowed out. Continue to heat up to 145 ° C, -0.85 MPa polycondensation reaction for 2 hours, and finally get 56.23 g of yellow viscous liquid NH 2 -HBP;

[0047] Take 7.500g of wheatgrass alkali lignin and add it into 7.5g of water and stir to dissolve it, and make it into an aqueous solution of wheatgrass alkali lignin, which is recorded as solution A; take the above 15.00g of NH 2 -HBP is added with 75.00g water and s...

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Abstract

The invention discloses a preparation method of a multifunctional asphalt stripping agent. The preparation method comprises following steps: under nitrogen gas protection, with stirring, a mixed solution of methyl acrylate and methanol is added into an organic polyamine solution dropwise, after dropwise adding, an obtained mixture is stirred for reaction at room temperature so as to obtain a transparent light yellow liquid intermediate; the transparent light yellow liquid intermediate is subjected to distillation to remove methanol, and is subjected to heating condensation polymerization to remove impurities so as to obtain a yellow thick liquid NH2-HBP; alkali lignin is prepared into an aqueous solution A; the NH2-HBP product is prepared into an aqueous solution B; an initiator is added for mixing stirring, reaction is carried out at 60 to 80 DEG C, and deposition, washing, and drying are carried out so as to obtain the multifunctional asphalt stripping agent. The multifunctional asphalt stripping agent possesses excellent stripping performance, anti-ultraviolet performance, and antioxidation performance, and is low in raw material cost and viscosity, excellent in intermiscibilitywith asphalt, and relatively mild in synthesis technology conditions.

Description

technical field [0001] The invention relates to an asphalt stripping agent, in particular to a preparation method of a multifunctional asphalt stripping agent. Background technique [0002] Bitumen is a black or dark brown solid, semi-solid or viscous liquid at room temperature, with good deformation resistance and water resistance. Therefore, it can be widely used as road, roof, waterproof, corrosion-resistant and other engineering materials. Usually, in order to achieve good economic benefits, asphalt is often mixed with low-cost mineral powder to form asphalt concrete. The mineral powder includes two types of acidic mineral powder and alkaline mineral powder. Acid mineral powder has the characteristics of dense, smooth and high strength, such as quartzite mineral powder and granite mineral powder, while limestone mineral powder and marble mineral powder belong to alkaline mineral powder. The performance of asphalt concrete is not only related to the performance of each ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C08L95/00C08L97/00
Inventor 王绍勤李胜男辛明昊张海菊葛登文吴迪郭坤杨洋
Owner 盘锦辽河油田大力集团有限公司
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