Non-ionic emulsifier, epoxy emulsion, preparation method and application thereof

A non-ionic, epoxy emulsion technology, applied in the direction of epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of cumbersome preparation process, inability to apply metal welding anti-corrosion, complex components of epoxy emulsifier, etc. High corrosion potential, effect of inhibiting metal corrosion

Active Publication Date: 2018-12-11
BAUHINIA PAINTS SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of the epoxy emulsifier prepared by this method is complex, the preparation process is cumbersome, and it cannot be applied to solve the problem of metal welding corrosion

Method used

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  • Non-ionic emulsifier, epoxy emulsion, preparation method and application thereof
  • Non-ionic emulsifier, epoxy emulsion, preparation method and application thereof
  • Non-ionic emulsifier, epoxy emulsion, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] This embodiment prepares non-ionic epoxy emulsion through the following steps

[0106] (1) In a 1000ml four-necked flask equipped with a thermometer, a nitrogen conduit, a stirrer, a water separator and an electric heating mantle, 580 g of polyethylene glycol monomethyl ether MPEG5000 (number-average molecular weight Mn=5000) was first dissolved in 100 ~110℃ through N 2 Purify for 30-60 minutes, then add 20g of methyltetrahydrophthalic anhydride (MTHPA) and 0.1% p-toluenesulfonic acid catalyst, maintain nitrogen flow, keep the reaction at 110°C for 4-5 hours, and measure the acid value ≤ 13.5mgKOH / g;

[0107] (2) Add 10g of ethylenediamine, 60g of toluene (it can be divided into two batches, and the water separator is filled with toluene in advance), react at 110-120°C for 2-3h, slowly raise the temperature to 210°C for 1-2h, and maintain 210°C Continue to react at ~220°C for 2~3h (water output is about 4g, primary amine value ≤5mgKOH / g), cool down to 160°C, release th...

Embodiment 2

[0114] (1) This step adopts the same reaction conditions as in Example 1, using 587g MPEG8000 (number-average molecular weight 8000) and 12.8g methyltetrahydrophthalic anhydride to prepare the half-ester, with an end point acid value≤8mgKOH / g;

[0115] (2) Add 10g of diethylenetriamine, 60g of toluene (it can be divided into two batches, and the water separator is filled with toluene in advance), react at 140-180°C for 2-3h, heat up to 210°C and maintain 210-220°C to continue the reaction 3h (water output is about 2.6g, primary amine value ≤11mgKOH / g), cool down to 160°C, release the solvent and by-products in the water separator, and vacuum extract for 1h;

[0116] (3) Further lower the temperature to 85°C, add 162g of NPES-301 (EEW: 450-500) epoxy resin and 90g of propylene glycol methyl ether, and maintain the reaction at 85-90°C for 3h (tertiary amine value 12-16mgKOH / g), and obtain about 860g, an emulsifier with a solid content of 90%, named Ex-2 / ER-2;

[0117] (4) prepa...

Embodiment 3

[0121] (1) This step adopts the same reaction conditions as in Example 1, polyethylene glycol PEG6000 (number average molecular weight Mn=6000) 584g and 15.7g hexahydrophthalic anhydride are first half-esterified, and the terminal acid value is less than or equal to 10mgKOH / g;

[0122] (2) This step adopts the same reaction conditions as step (2) in Example 2, and diethylenetriamine is replaced by 8.5g ethylenediamine to prepare imidazoline, the water output is about 3.4g, and the primary amine value at the end is ≤5mgKOH / g;

[0123] (3) Further lower the temperature to 85°C, add 134g of NPES-302 (EEW: 600-700) epoxy resin and 90g of propylene glycol methyl ether, and maintain the reaction at 85-90°C for 3h (tertiary amine value 11-14mgKOH / g), and obtain about 837g, an emulsifier with a solid content of 90%, named Ex-3 / ER-1;

[0124] (4) prepare epoxy emulsion by following batching:

[0125]

[0126] Utilize the emulsification method among the embodiment 1, obtain solid ...

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Abstract

The invention provides a non-ionic epoxy resin emulsifier. The emulsifier has a structure shown as formula ER-1 or ER-2. The invention also provides a preparation method for the non-ionic epoxy resinemulsifier. The invention provides a non-ionic epoxy emulsion, the preparation method and application thereof. The non-ionic epoxy emulsion provided by the invention has small diameter and high stability. A test in the manner of centrifugal separation for 30 minutes at 10000rpm proves that no layering bleeding phenomenon occurs, the change on grain size and epoxide equivalent is small and the protecting property for metal welding area is excellent after the non-ionic epoxy emulsion is stored for 6 months under room temperature.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a nonionic emulsifier, an epoxy emulsion, and a preparation method and application thereof, in particular to a nonionic emulsifier containing an imidazoline ring, an epoxy emulsion, and a preparation method and application thereof . Background technique [0002] Waterborne epoxy-polyamine cured anticorrosion coatings have made significant progress in reducing VOC emissions compared with traditional solvent-based epoxy anticorrosion coatings. Wetness is not as good as solvent-based coatings. In addition, no matter what method is used to prepare water-based epoxy, a certain amount of hydrophilic groups (non-ionic segments, cationic groups or anionic groups) are always introduced, so the anti-corrosion performance and solvent-based coatings There will be a slight difference in comparison. [0003] It is reported that, according to the statistics of more than 20 years, 85% ...

Claims

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Application Information

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IPC IPC(8): C08J3/03C09D163/00C09D5/08C08L63/00
CPCC08J3/03C08J2363/00C09D5/08C09D163/00
Inventor 郭家振陈超
Owner BAUHINIA PAINTS SHANGHAI CO LTD
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