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Acrylic acid modified epoxy phosphate ester resin and preparation method of aqueous dispersion thereof

A technology of epoxy phosphate ester and epoxy resin, used in coatings, anti-corrosion coatings, etc., can solve problems such as VOC emissions, and achieve the effect of good rust resistance and low hardness

Inactive Publication Date: 2015-04-29
BEIJING JINHWEILI APPLIED CHEM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solvent-based epoxy resin paints need to be diluted with a large amount of solvents, resulting in a large amount of VOC emissions, which cannot meet the increasingly stringent environmental protection requirements. In order to solve the above problems, and improve the adhesion of resin substrates, and provide other Anti-rust performance, specially developed the present invention

Method used

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  • Acrylic acid modified epoxy phosphate ester resin and preparation method of aqueous dispersion thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 60940g of epoxy resin and 16g of ethylene glycol butyl ether into the reaction flask, heat to 155°C and stir to dissolve;

[0029] (2) Add 0.4g of phosphoric acid to 2g of diethylene glycol butyl ether to dissolve, drop into the material in (1) at 150-155°C, add dropwise at a constant speed for 20-30min, finish dropping, and keep warm for 2hr;

[0030] (3) Mix 1.4g of acrylic acid, 0.9g of methyl methacrylate, 4.5g of butyl acrylate, 1.2g of hydroxyethyl acrylate, and 2g of diethylene glycol butyl ether, add 0.5g of cumene hydroperoxide, and mix well Finally, drop it into the above material at 150-155°C for 2-3 hours, and finally keep it warm for 3 hours to obtain acrylic modified epoxy phosphate resin;

[0031] (4) Cool down the modified resin to 100°C, add 3.2g of N,N-dimethylethanolamine, stir evenly, drop 80g of distilled water at 70°C into the resin under strong stirring, emulsify, and make a water dispersion . Its solid content is 32.1%, VOC 15.2%, and t...

Embodiment 2

[0034] (1) Add 60942g of epoxy resin and 22g of ethylene glycol butyl ether into the reaction flask, heat to 155°C and stir to dissolve;

[0035] (2) Add 0.45 g of phosphoric acid to 2 g of diethylene glycol butyl ether to dissolve, drop into the material in (1) at 150-155 ° C, add dropwise at a constant speed for 20-30 minutes, and keep warm for 2 hours;

[0036] (3) Mix 1.5g of acrylic acid, 0.9g of methyl methacrylate, 4.5g of butyl acrylate, 1.6g of hydroxyethyl acrylate, and 2g of diethylene glycol butyl ether, add 0.7g of cumene hydroperoxide, and mix well Finally, drop it into the above material at 150-155°C for 2-3 hours, and finally keep it warm for 3 hours to obtain acrylic acid-modified epoxy phosphate;

[0037] (4) Cool down the modified resin to 100°C, add 4g of N,N-dimethylethanolamine, stir evenly, drop 85g of distilled water at 70°C into the resin under strong stirring, emulsify, and make a water dispersion . It contains 31% solids and 18% VOC. , the lotion ...

Embodiment 3

[0040] (1) Add 60745g of epoxy resin and 28g of ethylene glycol butyl ether into the reaction flask, heat to 155°C and stir to dissolve;

[0041] (2) Add 0.5 g of phosphoric acid to 2 g of diethylene glycol butyl ether to dissolve, drop it into the material in (1) at 150-155 ° C, drop it at a constant speed for 20-30 minutes, and keep it warm for 2 hours;

[0042] (3) Mix 2g of acrylic acid, 0.9g of methyl methacrylate, 6.5g of butyl acrylate, 1.8g of hydroxyethyl acrylate, and 2g of diethylene glycol butyl ether, add 0.8g of cumene hydroperoxide, and mix well Drop into the above material at 150-155°C for 2-3 hours, and finally keep warm for 3 hours to obtain acrylic modified epoxy phosphate resin;

[0043] (4) Cool down the modified resin to 100°C, add 5.2g of N,N-dimethylethanolamine, stir evenly, drop 100g of distilled water at 70°C into the resin under strong stirring, emulsify, and make water dispersion body. Its solid content is 30.8%, VOC 18.3%, and the emulsion does ...

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Abstract

The invention belongs to the field of coating and provides acrylic acid modified epoxy phosphate ester resin and a preparation method of aqueous dispersion thereof. The formula comprises 40-45 parts of epoxy resin, 20-30 parts of a solvent, 0.4-0.5 part of phosphoric acid and 8-12 parts of acrylic acid (acrylate) monomer, wherein the acrylic acid monomer accounts for 1.4-2 parts, an initiator accounts for 0.5-0.8 part, a neutralizer accounts for 3.2-5.2 parts and water accounts for 80-100 parts. The preparation method comprises the following steps: modifying the epoxy resin by using the phosphoric acid, reacting the epoxy resin with the acrylic acid and the ester monomer thereof, adding the neutralizer and deionized water, stirring and emulsifying to obtain the aqueous dispersion of the acrylic acid modified epoxy phosphate ester resin, wherein the acid value of the emulsion is 10-12 mg KOH / g, and the solid content is 28-38%. The main body of the obtained resin dispersion is epoxy resin, has a phosphate structure and has a good adhesive force on a metal base material, so that the corrosion resistance is excellent, carboxyls are introduced by the modification of the acrylic resin and provides water dispersibility after being neutralized by the neutralizer, the resin can be made into a water-based paint, the VOC content is greatly reduced, and a plurality of carboxyls are carried on the epoxy main chain to be crosslinked with such resin as amino, urea formaldehyde and phenolic aldehyde to be made into stoving varnish.

Description

technical field [0001] The invention relates to a water-based acrylic modified epoxy phosphate resin and a preparation method of an aqueous dispersion thereof, belonging to the field of water-based paints. Background technique [0002] Epoxy resin is a kind of resin used in paint making. It has excellent anti-corrosion properties and is widely used in the anti-rust of metal substrates. However, solvent-based epoxy resin paints need to be diluted with a large amount of solvents, resulting in a large amount of VOC emissions, which cannot meet the increasingly stringent environmental protection requirements. In order to solve the above problems, and improve the adhesion of resin substrates, and provide other Anti-rust performance, specially developed the present invention. Contents of the invention [0003] The object of the present invention is to provide a kind of formula of acrylic modified epoxy phosphoric acid ester and the preparation method of the acrylic acid modifie...

Claims

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Application Information

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IPC IPC(8): C08F283/10C08F220/06C08F220/14C08F220/18C08F220/28C08G59/14C08J3/03C09D151/08C09D5/08
Inventor 王英秦文
Owner BEIJING JINHWEILI APPLIED CHEM PROD
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