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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AI-Extracted Technical Summary

Problems solved by technology

However, there is still much room for improvement in the corrosi...

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.

Application Domain

Anti-corrosive paintsEpoxy resin coatings

Technology Topic

ChemistryCorrosion +8

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Examples

Experimental program(4)

Example Embodiment

[0026] Example 1

[0027] The preparation method of the phosphate modified cashew nut oil curing agent of this embodiment includes the following steps:

[0028] Step (1). Add 3.7 kg of ethylene glycol solution to a 10L reactor, start the jacket circulation, and add 1.4 kg of phosphorus pentoxide to the ethylene glycol solution in ten equal parts under stirring at 800 rpm. For esterification reaction, control the temperature below 50℃;

[0029] Step (2), after adding the materials, stir for half an hour, raise the temperature to 100 degrees Celsius and react for another half an hour, discharge the materials to a storage tank while they are 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 reactor, start the jacket cycle, slowly add 30g of the above polyol phosphate under stirring, and the addition rate is such that the temperature rise does not exceed 10°C. Limit, continue to stir for 1 hour and then discharge to the storage tank to obtain different phosphate modified cashew butter curing agents.

Example Embodiment

[0031] Example 2

[0032] The preparation method of the phosphate modified cashew nut oil curing agent of this embodiment includes the following steps:

[0033] Step (1). Add 3.5 kg of ethylene glycol, glycerol, and monoglyceride solution into a 10L reactor, start the jacket circulation, and add 1.4 kg of phosphorus pentoxide to the above solution under stirring at 1200 rpm. Add tens of equal parts for esterification reaction, and control the temperature below 50℃;

[0034] Step (2), after adding the materials, stir for half an hour, raise the temperature to 100 degrees Celsius and react for another half an hour, discharge the materials to a storage tank while they are 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 reactor, start the jacket cycle, slowly add 300g of the above polyol phosphate under stirring, and the addition rate is such that the temperature rise does not exceed 10°C. Limit, continue to stir for 1 hour and then discharge to the storage tank to obtain different phosphate ester modified cashew nut oil curing agents.

Example Embodiment

[0036] Example 3

[0037] Step (1). Add 3.7 kg of ethylene glycol and monoglyceride solution into a 10L reactor, start the jacket cycle, and add 0.5 kg of pentaoxidized glycerol monostearate solution to the glycerol monostearate solution under stirring at 1500 rpm. Diphosphorus was added in two equal parts to carry out the esterification reaction, and the temperature was controlled below 50℃;

[0038] Step (2). After adding the materials, stir for half an hour. Under reduced pressure, heat up to 100 degrees Celsius and react for half an hour, and further heat up to 120 degrees Celsius to distill off unreacted ethylene glycol, and cool to room temperature to obtain multi-component Alcohol phosphate

[0039] Step (3). First add 3kg of cashew phenalkamine curing agent to another 10L reactor, start the jacket cycle, slowly add 600g of the above polyol phosphate ester under stirring, continue stirring for 1 hour and then discharge to storage Can obtain different phosphate ester modified cashew nut oil curing agents.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

low price
Wide variety of sources

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.

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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