Aniline trimer modified sulfonate type waterborne epoxy curing agent and preparation method thereof

An aniline trimer and water-based epoxy technology, applied in the field of polymer materials, can solve the problem of not developing aniline oligomer anti-corrosion fillers or modified materials, etc., and achieve excellent anti-corrosion performance, thermal stability, high hardness, Strong adhesion effect

Active Publication Date: 2019-11-22
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of aniline trimer modified sulfonate type water-based epoxy curing agent and preparation method thereof, to solve the problem of not developing aniline oligomer in the prior art as Technical issues with anti-corrosion fillers or modified materials

Method used

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  • Aniline trimer modified sulfonate type waterborne epoxy curing agent and preparation method thereof
  • Aniline trimer modified sulfonate type waterborne epoxy curing agent and preparation method thereof
  • Aniline trimer modified sulfonate type waterborne epoxy curing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Prepare aniline trimer modified sulfonate water-based epoxy curing agent according to the following steps:

[0057] Add 1.73g of p-phenylenediamine sulfate dissolved in 100mL of hydrochloric acid solution (1.0mol / L) into a three-necked flask, cool down to -5°C, add 3.65g of ammonium persulfate and stir evenly, then quickly add 2.98g of aniline solution and keep The temperature of the system is between -5-0°C for 1 hour. After the reaction, the product is filtered and washed with 10% ammonia water and deionized water until the filtrate is neutral, and the solid product is dried to obtain aniline trimer (AT). Until the filtrate is neutral, it is finally placed in a vacuum oven at 50°C for 24 hours to prepare AT for use.

[0058] 94.5g tetraethylenepentamine (TEPA) is added in the there-necked flask, and 2.9g aniline trimer AT (AT accounts for TEPA and AT total mole fraction is 2%) is dissolved in the propylene glycol methyl ether and is added in the TEPA, control At a t...

Embodiment 2

[0069] Prepare aniline trimer modified sulfonate water-based epoxy curing agent according to the following steps:

[0070] Add 4.33g of p-phenylenediamine sulfate dissolved in 150mL of hydrochloric acid solution (1.0mol / L) into a three-necked flask, cool down to -5°C, add 11.52g of ammonium persulfate solution and stir evenly, then quickly add 7.44g of aniline solution, Keep the temperature of the system at -5-0°C and react for 1 hour. After the reaction is over, filter and wash the product with 10% ammonia water and deionized water until the filtrate is neutral, and dry the solid product to obtain aniline trimer body (AT). Until the filtrate is neutral, it is finally placed in a vacuum oven at 50°C for 24 hours to prepare AT for use.

[0071] Add 73.0g of triethylenetetramine (TETA) into the three-necked flask, and weigh 6g of aniline trimer AT (AT accounts for 4% of the total mole fraction of TETA and AT) and dissolve it in propylene glycol methyl ether and add it to TETA, ...

Embodiment 3

[0077] Prepare aniline trimer modified sulfonate water-based epoxy curing agent according to the following steps:

[0078] Add 8.65g of p-phenylenediamine sulfate dissolved in 200mL of hydrochloric acid solution (1.0mol / L) into a three-necked flask, cool down to -5°C, add 21.89g of ammonium persulfate solution and stir evenly, then quickly add 18.6g of aniline solution, Keep the temperature of the system at -5-0°C and react for 1 hour. After the reaction is over, filter and wash the product with 10% ammonia water and deionized water until the filtrate is neutral, and dry the solid product to obtain aniline trimer body (AT). Until the filtrate is neutral, it is finally placed in a vacuum oven at 50°C for 24 hours to prepare AT for use.

[0079] Add 51.5g of diethylenetriamine (DETA) into the three-necked flask, and weigh 12.5g of aniline trimer AT (AT accounts for 8% of the total molar fraction of TETA and AT) in addition, dissolve it in propylene glycol methyl ether and add i...

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Abstract

The invention discloses an aniline trimer modified sulfonate type waterborne epoxy curing agent and a preparation method thereof, belonging to the field of polymer materials. The method includes preparing a soluble aniline trimer by adopting a chemical oxidation method; reacting the aniline trimer, a monoepoxy end-capping reagent and fatty amine which are adopted as raw materials to obtain a monoend-capped mixed product of the aniline trimer and the fatty amine; mixing the product with sulfamate; and then reacting the mixture with epoxy resin to synthesize the aniline trimer modified sulfonatetype waterborne epoxy curing agent. The epoxy curing agent has water dispersibility and relatively low viscosity, so that the epoxy curing agent can be stably stored under the condition of no diluent. The process is simple, the reaction is easy to control, an epoxy coating film obtained by curing of the curing agent is high in hardness, high in impact resistance and good in glossiness, the adhesive force reaches the zero level, the pencil hardness is 2-3 H, and the acid and alkali corrosion resistance is good.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an aniline trimer modified sulfonate water-based epoxy curing agent and a preparation method thereof. Background technique [0002] Epoxy resin, as a class of thermosetting materials with excellent physical and mechanical properties, electrical insulation, chemical corrosion resistance, and heat resistance, has been widely used in various fields such as construction, chemical industry, transportation, and electronics. Among them, water-based epoxy curing agent, as the key to the actual production and application of water-based epoxy resin, is a research hotspot in recent years. At present, the preparation methods of water-based epoxy curing agents can be divided into cationic and non-ionic. Among them, cationic water-based epoxy curing agents are usually prepared by neutralizing organic acids to form salts, but the presence of excessive organic acids will reduce the film-forming ...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G59/64
CPCC08G81/00C08G59/64
Inventor 杨建军曹忠富王思学吴庆云陈春俊周铭张建安吴明元刘久逸
Owner ANHUI UNIVERSITY
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