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Preparation method and application of phosphate modified cashew nut oil curing agent

A technology of cashew nut oil and phosphoric acid ester is applied in the field of coating resins and achieves the effects of wide sources, simple and convenient production process and low price.

Active Publication Date: 2018-01-26
昆明迈泽科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still much room for improvement in the corrosion resistance of current epoxy heavy-duty anti-corrosion coatings

Method used

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  • Preparation method and application of phosphate modified cashew nut oil curing agent
  • Preparation method and application of phosphate modified cashew nut oil curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the phosphoric acid ester modified cashew nut oil solidifying agent of the present embodiment may further comprise the steps:

[0028] Step (1), add 3.7 kg of ethylene glycol solution into the 10L reactor, turn on the jacket circulation, and add 1.4 kg of phosphorus pentoxide to the ethylene glycol solution in ten equal portions under the stirring condition of 800 rpm. Esterification reaction, control the temperature below 50°C;

[0029] Step (2), after adding the materials, stir for half an hour, raise the temperature to 100 degrees Celsius and react for half an hour, discharge the material to the storage tank while it is hot, and cool to room temperature to obtain polyol phosphate;

[0030] Step (3), first add 3kg of cashew nut oil phenalkamine curing agent to another 10L reaction kettle, start the jacket circulation, slowly add 30g of the above-mentioned polyol phosphate under stirring, and the addition rate is based on the temperature rise ...

Embodiment 2

[0032] The preparation method of the phosphoric acid ester modified cashew nut oil solidifying agent of the present embodiment may further comprise the steps:

[0033] Step (1), add 3.5 kg of ethylene glycol, glycerol, and monoglyceride solution into the 10L reaction kettle, open the jacket circulation, and add 1.4 kg of phosphorus pentoxide to the above solution under the stirring condition of 1200 rpm Add in ten equal portions for esterification reaction, and control the temperature below 50°C;

[0034] Step (2), after adding the materials, stir for half an hour, raise the temperature to 100 degrees Celsius and react for half an hour, discharge the material to the storage tank while it is hot, and cool to room temperature to obtain polyol phosphate;

[0035] Step (3), first add 3kg of cashew nut oil phenalkamine curing agent to another 10L reaction kettle, start the jacket circulation, slowly add 300g of the above-mentioned polyol phosphate under stirring, and the addition r...

Embodiment 3

[0037] Step (1), add 3.7 kg of ethylene glycol and monoglyceride solution into a 10L reactor, open the jacket circulation, and add 0.5 kg of pentoxide to the glycerol monostearate solution under stirring at 1500 rpm Diphosphorus is added in two equal parts for esterification reaction, and the temperature is controlled below 50°C;

[0038] Step (2), after adding the materials, stir for half an hour, under reduced pressure, raise the temperature to 100 degrees Celsius and react for half an hour, further raise the temperature to 120 degrees Celsius to distill off unreacted ethylene glycol, cool to room temperature, and obtain multi-component alcohol phosphate;

[0039] Step (3), first add 3kg of cashew nut oil phenalkamine curing agent to another 10L reaction kettle, start the jacket circulation, slowly add 600g of the above polyol phosphate under stirring, continue to stir for 1 hour, and then unload to the storage tank Cans get different phosphate-modified cashew butter harden...

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Abstract

The invention relates to a preparation method and an application of a phosphate modified cashew nut oil curing agent and belongs to the field of coating resin. The method comprises steps as follows: firstly, phosphate with certain functionality is prepared from phosphorus pentoxide and polyol through a reaction in a reaction kettle, then phosphate and a cashew nut oil phenolic aldehyde amine curing agent are mixed in a specific ratio, and phenolic aldehyde amine curing agents with different viscosities and hydroxyl values are obtained. The modification method is simple, corrosion resistance ofan epoxy resin paint film can be further improved, the curing speed can be adjusted by adjusting acidity of phosphate, and the modification effect is excellent.

Description

technical field [0001] The invention relates to a preparation method of a modified cashew nut oil curing agent, in particular to a preparation method of a phosphoric acid ester modified cashew nut oil curing agent, and also relates to its application, belonging to the field of coating resins. Background technique [0002] Epoxy resin is a film-forming material widely used in the field of heavy-duty anti-corrosion coatings. Because it contains a large number of polar polyether groups, it has strong adhesion to steel structure substrates and will not be hydrolyzed by strong acids and alkalis. Therefore, it exhibits excellent chemical corrosion resistance and is an indispensable primer resin in the field of heavy anticorrosion. [0003] In addition to the characteristics of the epoxy resin itself, the curing agent plays a key role in its anti-corrosion performance. On the one hand, it promotes the cross-linking and curing of the resin, and on the other hand, it introduces more ...

Claims

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Application Information

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IPC IPC(8): C08G59/62C08G59/68C09D5/08C09D163/00
Inventor 何俊杰李崧张恒
Owner 昆明迈泽科技有限公司
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