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A kind of bifunctional epoxy resin emulsifier and preparation method of emulsion

An epoxy resin and bifunctional technology, which is used in the field of preparation of bifunctional epoxy resin emulsifiers and emulsions, can solve the problems of difficult reaction control, high preparation cost, and many by-products, and achieves dilution and storage stability. Excellent, low reaction requirements, enhanced hydrophilicity and heat resistance effects

Active Publication Date: 2018-12-28
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former mainly introduces polar groups into the epoxy resin chain through free radical grafting modification and functional monomer chain extension, and then neutralizes to form a salt to prepare self-emulsifying waterborne epoxy resin. This method is expensive and complicated to prepare , the reaction is difficult to control, and there are many by-products

Method used

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  • A kind of bifunctional epoxy resin emulsifier and preparation method of emulsion
  • A kind of bifunctional epoxy resin emulsifier and preparation method of emulsion
  • A kind of bifunctional epoxy resin emulsifier and preparation method of emulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1. Synthesis of PEGDET

[0028] Under a nitrogen atmosphere, add 40.00g (10mmol) PEG4000 and 3.84g (20mmol) TMA to a 250ml three-neck flask with a condenser, heat and stir to make the raw materials completely miscible, and take 1ml (3.5mol / L) of TMA with a syringe. The boron trifluoride ether polyethylene glycol 400 solution was slowly added dropwise to the above reaction solution, the temperature was raised to 70°C, the acid value was measured every 0.5h, and the corresponding esterification rate was calculated, and the reaction was carried out for 2h. Then add 9.09g (20mmol) E-44 to the reaction system, continue the reaction at 95°C for 5h under the action of the catalyst boron trifluoride ether (no need to supplement), and take samples every 0.5h to measure the epoxy value to calculate the epoxy conversion rate , and finally make PEGDET.

[0029] 2. Preparation of Waterborne Epoxy Resin Emulsion

[0030] Add the PEGDET and E-44 prepared by the above method into a 1...

Embodiment 2

[0033] 1. Synthesis of PEGDET

[0034] Under a nitrogen atmosphere, add 40.00g (10mmol) PEG4000 and 3.84g (20mmol) TMA to a 250ml three-necked flask with a condenser, heat and stir to make the raw materials completely miscible, and take 2ml (3.5mol / L) of TMA with a syringe. Boron trifluoride ether polyethylene glycol 400 solution was slowly added dropwise to the above reaction solution, the temperature was raised to 80°C, the acid value was measured every 0.5h, and the corresponding esterification rate was calculated, and the reaction was carried out for 2h. Then add 9.09g (20mmol) E-44 to the reaction system, continue the reaction at 95°C for 5h under the action of the catalyst boron trifluoride ether (no need to supplement), and take samples every 0.5h to measure the epoxy value to calculate the epoxy conversion rate , and finally make PEGDET.

[0035] 2. Preparation of Waterborne Epoxy Resin Emulsion

[0036] Add the PEGDET and E-44 prepared by the above method into a 100...

Embodiment 3

[0039] 1. Synthesis of PEGDET

[0040] Under a nitrogen atmosphere, add 40.00g (10mmol) PEG4000 and 3.84g (20mmol) TMA to a 250ml three-necked flask with a condenser, heat and stir to make the raw materials completely miscible, and take 2ml (3.5mol / L) of TMA with a syringe. The boron trifluoride ether polyethylene glycol 400 solution was slowly added dropwise to the above reaction solution, the temperature was raised to 70°C, the acid value was measured every 0.5h, and the corresponding esterification rate was calculated, and the reaction was carried out for 1h. Then add 9.09g (20mmol) E-44 to the reaction system, continue the reaction at 95°C for 5h under the action of the catalyst boron trifluoride ether (no need to supplement), and take samples every 0.5h to measure the epoxy value to calculate the epoxy conversion rate , and finally make PEGDET.

[0041] 2. Preparation of Waterborne Epoxy Resin Emulsion

[0042] Add the PEGDET and E-44 prepared by the above method into a...

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Abstract

The invention relates to a preparing method of bifunctionality epoxy resin emulsifier and emulsion. The preparing method comprises the specific steps that 1, trimellitic anhydride (TMA) and a catalyst (boron trifluoride diethyl etherate) are added into polyethylene glycol (PEG4000), and the temperature is raised for reaction; 2, a proper amount of bisphenol A epoxy resin E-44 is added into the reaction liquid, and the temperature continues to be raised for the reaction, so that multi-block epoxy resin emulsifier (PEGDET for short) is obtained; 3, a proper amount of epoxy resin and the emulsifier are mixed, deionized water is slowly added dropwise at a certain temperature, high-speed stirring is carried out until viscosity of a system is reduced abruptly, at the moment, the system is subjected to phase inversion, and water continues to be added, so that the water-borne epoxy resin emulsion is obtained. The water-borne epoxy resin emulsion prepared through the method has the advantages of being small in average grain diameter, low in dispersion, excellent in centrifuge, dilution and storage stability performance and the like, and a new thought is provided for preparing high-performance water-borne epoxy emulsion.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a difunctional epoxy resin emulsifier and a preparation method of the emulsion. Background technique [0002] With the increasing awareness of environmental protection in society, high-performance green and environmentally friendly coatings such as water-based coatings and powder coatings have attracted more and more attention. Water-based resin is an emulsion or aqueous solution formed by dispersing synthetic resin particles, droplets or colloids in the water phase. It has the advantages of environmental protection, low price and convenient construction. It is widely used in chemical industry, construction, food, aviation, fields such as pharmaceuticals and electrical appliances. At present, there are many kinds of water-based resins, including water-based polyurethane, water-based epoxy resin, water-based acrylic resin, etc., all of which have shown excel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08J3/03C08L63/00
CPCC08G81/00C08J3/03C08J2363/00
Inventor 马江权陈坤姚超左士祥殷云武薛宝安景小涛
Owner CHANGZHOU UNIV
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