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Reactive emulsifier, water-borne epoxy resin emulsion, preparation and application

A reactive emulsifier, water-based epoxy resin technology, applied in the direction of online phenolic epoxy resin adhesive, epoxy resin glue, epoxy resin coating, etc., can solve the problem of reducing the mechanical properties of coatings, adhesion performance, water resistance and waterproofing Corrosion performance, easy water absorption and whitening of the coating film, complicated preparation methods, etc., to achieve the effects of low production cost, good stability, and simple process flow

Inactive Publication Date: 2020-05-19
GUANGZHOU CHEM GROUTING CO LTD CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of the epoxy resin emulsion prepared by the self-emulsification method is small, but the preparation method is relatively complicated, the controllability is poor, and the raw material cost is high
Adding emulsifier method is currently the most commonly used water-based epoxy resin technology. Water-based epoxy resin coatings prepared with non-reactive emulsifiers will reduce the mechanical properties, adhesion properties, and water resistance of the coatings because the emulsifiers do not participate in the curing reaction. And anti-corrosion performance, especially the water resistance will be greatly reduced, and the coating film is easy to absorb water and turn white

Method used

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  • Reactive emulsifier, water-borne epoxy resin emulsion, preparation and application
  • Reactive emulsifier, water-borne epoxy resin emulsion, preparation and application
  • Reactive emulsifier, water-borne epoxy resin emulsion, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Add 30g of cardanol (0.1mol) and 10g of diethylenetriamine (0.1mol) into a three-necked flask with a mechanical stirring paddle and a condenser, heat the constant temperature oil bath to 50°C, and mix the reactants Slowly add 3g of paraformaldehyde (based on the amount of formaldehyde, the dosage is 0.1mol) in batches, and react for 1h after the addition; then raise the temperature to 90°C, and continue the reaction for 3h under the condition of an oil bath; after the reaction is completed, the reaction system is cooled to 50 ℃ to stop the reaction to obtain the intermediate product phenalkamine;

[0047] (2) Slowly add 37.5g polyethylene glycol diglycidyl ether (epoxy value 0.32, consumption 0.06mol) in batches to the intermediate product phenalkamine obtained in step (1), after the addition is complete, react at 50°C for 2h, Obtain 80.5g reactive emulsifier;

[0048] (3) Slowly add water to the reactive emulsifier prepared in step (2) (the amount is 4 times the m...

Embodiment 2

[0052] (1) Add 30g of cardanol (0.1mol) and 16g of triethylenetetramine (0.11mol) into a three-necked flask with a mechanical stirring paddle and a condenser, heat the constant temperature oil bath to 55°C, and mix the reactants Slowly add 3.3g of paraformaldehyde (0.11mol based on the amount of formaldehyde) in batches, and react for 0.5h after the addition; then raise the temperature to 95°C, and continue the reaction for 4h under the condition of an oil bath; after the reaction is completed, the reaction system is cooled Stop the reaction at 55°C to obtain the intermediate product phenalkamine;

[0053] (2) Slowly add 33.5g polyethylene glycol diglycidyl ether (epoxy value 0.3, consumption 0.05mol) in batches to the intermediate product phenalkamine obtained in step (1), after the addition is complete, react at 55°C for 3h, Obtain 82.8g reactive emulsifier;

[0054] (3) Slowly add water to the reactive emulsifier prepared in step (2) (the amount is 6 times the mass of the ...

Embodiment 3

[0058] (1) Add 30g of cardanol (0.1mol) and 27.6g of polyetheramine D-230 (0.12mol) into a three-necked flask equipped with a mechanical stirring paddle and a condenser, and heat the constant temperature oil bath to 60°C. Slowly add 3g of paraformaldehyde in batches to the mixed reactant (based on the amount of formaldehyde, the dosage is 0.1mol), and react for 0.5h after the addition is complete; then raise the temperature to 100°C, and continue the reaction for 3.5h under the condition of an oil bath; after the reaction is completed, put The reaction system was cooled to 60°C to stop the reaction, and the intermediate product phenalkamine was obtained;

[0059] (2) Slowly add 25g of polyethylene glycol diglycidyl ether (epoxy value 0.4, dosage 0.05mol) in batches to the intermediate product phenalkamine obtained in step (1), after the addition is complete, react at 60°C for 4h to obtain 85.6g reactive emulsifier;

[0060] (3) Slowly add water to the reactive emulsifier prep...

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Abstract

The invention belongs to the technical field of waterborne epoxy resin, and particularly relates to a reactive emulsifier, waterborne epoxy resin emulsion, preparation and application. Phenolic aldehyde amine generated by condensation reaction of cardanol, paraformaldehyde and micromolecular polyamine reacts with polyethylene glycol diglycidyl ether to obtain the reaction type emulsifier being ofan "amine-polyoxyethylene ether-amine" structure, which is terminated by the aldehyde group of the cardanol and has hydrophilic middle chain sections; then mixing the reactive emulsifier with water toform a nano-scale emulsion, and mixing the nano-scale emulsion with epoxy resin at a high speed to obtain the water-borne epoxy resin emulsion. The method is simple in technological process, safe tooperate, mild in reaction and low in production cost. The preparation method is simple and the prepared reactive emulsifier is good in emulsifying effect, so that the water-borne epoxy resin emulsionwith good stability is obtained under the condition that few hydrophilic components are introduced. The water-borne epoxy resin emulsion has excellent mechanical property, adhesion property, water resistance and corrosion resistance when used as a water-borne coating.

Description

technical field [0001] The invention belongs to the technical field of water-based epoxy resin, and in particular relates to a reactive emulsifier, a water-based epoxy resin emulsion and its preparation and application. Background technique [0002] Epoxy resin materials have good adhesion, chemical resistance, adhesion, water resistance, stability and insulation properties, so they are widely used in various fields such as coatings, composite materials and adhesives. However, epoxy resin has a high viscosity and is insoluble in water but easily soluble in organic solvents. Therefore, traditional epoxy resin coatings are all solvent-based, containing a large amount of volatile and certain toxic organic solvents, which are highly polluting to the environment. . With the enhancement of people's awareness of environmental protection, the demand for environmentally friendly and pollution-free coatings is also increasing, and the preparation of environmentally friendly and pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/333C08G59/62C08J3/03C08L63/04C08L63/02C09D5/08C09D163/02C09D163/04C09J163/02C09J163/04
CPCC08G65/33313C08G59/623C08J3/03C09D5/08C09D163/00C09D163/04C09J163/00C09J163/04C08J2363/02C08J2363/04
Inventor 曾娟娟韦代东古伟斌庄园
Owner GUANGZHOU CHEM GROUTING CO LTD CAS
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