Method for preparing high-temperature blending epoxy asphalt curing agent for paving

An epoxy asphalt, high-temperature mixing technology, applied in the field of asphalt materials, can solve the problems of tight holding time, long holding time, low mixing temperature, etc., and achieve the effects of improving construction technology, long holding time, and easy to enlarge

Inactive Publication Date: 2016-07-13
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defects of low mixing temperature and extremely tight retention time of this kind of warm-mixed epoxy asphalt make it difficult to construct, poor paving compaction, poor stability, etc. The service performance of the bridge is degraded or even seriously damaged, which seriously affects the normal use of the bridge.
The mixing temperature of TAF epoxy asphalt produced by Dayou Construction Company in Japan is about 160-170°C, and the retention time is long, which solves this technological problem better, but its compatibility is poor, toughness is poor, and the cost is too high. High, which is the key factor limiting its mass application

Method used

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  • Method for preparing high-temperature blending epoxy asphalt curing agent for paving
  • Method for preparing high-temperature blending epoxy asphalt curing agent for paving
  • Method for preparing high-temperature blending epoxy asphalt curing agent for paving

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) First, dissolve 10 parts of hyperbranched poly(3-ethyl-3-hydroxymethylbutylene oxide) and 10 parts of aminobenzoic acid in 100 parts of N,N-dimethyl In the formamide solvent, add 1 part of catalyst potassium hydroxide therein again;

[0029] 2) Then, feed nitrogen into the reaction system, raise the temperature to 80°C for 8 hours under stirring, and then raise the temperature to 120°C for 12 hours;

[0030] 3) After the reaction is finished, the solvent is distilled off under reduced pressure, and 50 parts of low boiling point solvent acetone are added thereto, filtered after 300 parts of settling agent ether is settled, washed until the filtrate is colorless, and then dried in a vacuum oven at 80°C to obtain Aromatic aminated hyperbranched polyether containing 100% aromatic aminated hyperbranched polyether;

[0031] 4) Mix aromatic aminated hyperbranched polyether and polysebacic anhydride in a mass ratio of 25:75 to prepare an epoxy asphalt curing agent.

[0032...

Embodiment 2

[0037] 1) First, dissolve 15 parts of hyperbranched poly(3-methyl-3-hydroxymethylbutylene oxide) and 10 parts of aminophenylacetic acid in 50 parts of N,N-dimethylethyl ether by mass parts In the amide solvent, add 1 part of catalyst sodium hydroxide therein again;

[0038] 2) Then, feed nitrogen into the reaction system, raise the temperature to 100°C for 6 hours under stirring, and then raise the temperature to 130°C for 10 hours;

[0039] 3) After the reaction is finished, the solvent is distilled off under reduced pressure, and 50 parts of low-boiling point solvent ethanol is added thereto, filtered after 400 parts of settling agent petroleum ether is settled, washed until the filtrate is colorless, and then dried in a vacuum oven at 100°C. An aromatic aminated hyperbranched polyether having an aromatic aminated hyperbranched polyether content of 100% is obtained;

[0040] 4) Mix aromatic aminated hyperbranched polyether and polyazalic anhydride in a mass ratio of 25:75 t...

Embodiment 3

[0043]1) First, 20 parts of hyperbranched poly(3,3-dimethylol-butylene oxide) and 20 parts of aminophenylpropionic acid are dissolved in 200 parts of N-methyl-2-pyrrolidone by mass parts In the solvent, add 1 part of catalyst triethylamine to it again;

[0044] 2) Then, feed nitrogen into the reaction system, heat up to 120°C for 6 hours under stirring, and then heat up to 160°C for 3 hours;

[0045] 3) After the reaction is finished, the solvent is distilled off under reduced pressure, and 80 parts of low boiling point solvent N,N-dimethylformamide is added thereto, filtered after 350 parts of settling agent n-hexane is settled, washed until the filtrate is colorless, and then drying in a vacuum oven at 90° C. to obtain an aromatic aminated hyperbranched polyether with an aromatic aminated hyperbranched polyether content of 100%;

[0046] 4) Mix aromatic aminated hyperbranched polyether and polysebacic anhydride in a mass ratio of 25:75 to prepare an epoxy asphalt curing age...

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Abstract

The invention relates to a method for preparing a high-temperature blending epoxy asphalt curing agent for paving and the application of the high-temperature blending epoxy asphalt curing agent in epoxy asphalt.A hyperbranched polymer which contains an aromatic amine group and a hydroxyl group is generated through condensation reaction of hyperbranched polyether containing hydroxy and aromatic amino acid under the action of a catalyst and aliphatic acid anhydride to obtain the high-temperature blending epoxy asphalt curing agent.The curing agent has a highly branched molecular structure and low viscosity, has a low reaction speed with epoxy resin at a high temperature, can be used for preparation of high-temperature blending epoxy asphalt, and still has certain reactivity at indoor temperature.Raw material source is wide, and preparing process is simple.The method can be used for preparing high-temperature blending epoxy asphalt for high-grade road surface and bridge deck pavement and has the advantages that high-temperature viscosity is low, reserved time is long, and curing crosslinking can be achieved fast at indoor temperature.

Description

technical field [0001] The invention belongs to the field of asphalt materials, and in particular relates to a preparation method of a high-temperature mixing epoxy asphalt curing agent for pavement. Background technique [0002] Epoxy asphalt has excellent high temperature stability, low temperature crack resistance, super fatigue resistance and excellent durability, and is widely used in steel bridge deck pavement, airport runway pavement, tunnel pavement pavement, etc. High traffic pavement. At present, epoxy asphalt used in my country is mainly imported from American ChemCoSystem Company and Japan Dayou Construction Company. It is not only expensive (about 10 to 20 times that of ordinary asphalt), but also has a single product variety, which cannot be adjusted according to the actual situation of the project. [0003] Since epoxy asphalt is a thermosetting pavement material, which breaks the previous understanding that asphalt is a thermoplastic material, its paving pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/58C08G59/42C08G65/333
CPCC08G59/4207C08G59/58C08G65/33313
Inventor 许培俊丛培良
Owner CHANGAN UNIV
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