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Paint containing water-based acrylic modified epoxy phosphate resin and preparation method thereof

A technology of epoxy phosphate ester and water-based acrylic acid, which is applied in the direction of epoxy resin coatings, anti-corrosion coatings, chemical instruments and methods, and can solve problems such as damage, high solid content, and environmental pollution

Inactive Publication Date: 2015-09-02
BEIJING JINHWEILI APPLIED CHEM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, solvent-based coatings are mainly used in the market, which are applied to parts of automobiles, construction machinery, agricultural machinery and other surface protection using metal materials as substrates, that is, paints protect metal substrates. The carrier of such products is volatile Organic solvents will volatilize to the atmosphere during the film forming process, causing pollution and harm to the environment and human health
[0003] On the other hand, epoxy polyester has high hardness, excellent metal adhesion, good weather resistance and strong corrosion resistance due to its structure such as epoxy groups and benzene rings. It is widely used in anti-corrosion primers or topcoats and ground Ping and other fields, but epoxy resin itself is insoluble in water and can only be dissolved with organic solvents such as acetone or various esters. During the construction process, a large number of toxic and harmful solvents will volatilize, which seriously threatens the health of construction workers. It also causes great pollution and damage to the environment
At present, there is a process of emulsifying and dispersing epoxy resin with an emulsifier, but it is difficult to achieve a high solid content, and its stability is also greatly reduced. Even after the film is formed, the density of the film itself is difficult to match with solvent-based paints. Therefore, it is of great significance to develop a water-based coating that can meet the requirements of high solid content, good stability and low VOC content in construction.

Method used

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  • Paint containing water-based acrylic modified epoxy phosphate resin and preparation method thereof
  • Paint containing water-based acrylic modified epoxy phosphate resin and preparation method thereof
  • Paint containing water-based acrylic modified epoxy phosphate resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 40g of epoxy resin 609 and 16g of butyl glycol 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 the emuls...

Embodiment 2

[0033] (1) Add 42g of epoxy resin 609 and 22g of butyl glycol ether into the reaction flask, heat to 155°C and stir to dissolve;

[0034] (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;

[0035] (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;

[0036] (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 can be p...

Embodiment 3

[0038] (1) Add 607.45g of epoxy resin and 28g of ethylene glycol butyl ether into the reaction flask, heat to 155°C and stir to dissolve;

[0039] (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;

[0040] (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;

[0041] (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 n...

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Abstract

The invention belongs to the field of painting, and particularly relates to acrylic acid modified epoxy phosphate resin and an aqueous dispersion thereof. In the formula, the acrylic acid modified epoxy phosphate resin is prepared from 40-45 parts of epoxy resin, 20-30 parts of a solvent, 0.4-0.5 part of phosphoric acid, 8-12 parts of acrylic acid (ester) monomer of which acrylic acid accounts for 1.4-2 parts, 0.5-0.8 part of an initiator, 3.2-5.2 parts of neutralizer and 80-100 parts of water. The resin is prepared by the following steps: modifying epoxy resin with phosphoric acid, and reacting with acrylic acid and ester monomers thereof; adding the neutralizer and deionized water, stirring and emulsifying to obtain the acrylic acid modified epoxy phosphate aqueous dispersion, wherein the acid value of the emulsion is 10-12mgKOH / g, and the solid content is 28-38 percent. The prepared main resin dispersion body is epoxy resin, has a phosphate structure, and has a good adhesive force for metal base materials, thus having good corrosion resistance; acrylic resin is modified, introduced with carboxyl and neutralized by the neutralizer to give aqueous dispersion to resin, so that the resin can be produced into water-borne painting, and the content of VOC is greatly reduced; and multiple hydroxyl radicals are arranged on the main chain of the epoxy resin, and can be crosslinked with amino resin, urea resin and phenolic resin to produce stoving varnish.

Description

technical field [0001] The invention relates to a coating containing water-based acrylic modified epoxy phosphate resin and a preparation method thereof, belonging to the field of water-based coatings. Background technique [0002] At present, solvent-based coatings are mainly used in the market, which are applied to parts of automobiles, construction machinery, agricultural machinery and other surface protection using metal materials as substrates, that is, paints protect metal substrates. The carrier of such products is volatile Organic solvents will volatilize to the atmosphere during the film forming process, causing pollution and harm to the environment and human health. [0003] On the other hand, epoxy polyester has high hardness, excellent metal adhesion, good weather resistance and strong corrosion resistance due to its structure such as epoxy groups and benzene rings. It is widely used in anti-corrosion primers or topcoats and ground Ping and other fields, but epo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/10C09D5/08C09D7/12C09F9/00
CPCC08K3/04C08K3/22C08K3/30C08K3/32C08K13/02C08K2003/2241C08K2003/2272C08K2003/3045C08K2003/328C08L2205/03C09D5/08C09D163/10C08L61/20C08L75/04
Inventor 张扬秦文
Owner BEIJING JINHWEILI APPLIED CHEM PROD
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