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Self-emulsifying water-based epoxy phosphate anticorrosion emulsion and preparation method thereof

An epoxy phosphate ester, self-emulsifying technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of multiple processes, steel flash corrosion, etc., and achieve the effects of reducing processes, enhancing adhesion, and small particle size

Active Publication Date: 2019-09-17
HUBEI JIAJI SYNTHESIS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the water-based epoxy resin emulsion is directly applied to the steel surface, the flash corrosion of the steel is serious, so it is often necessary to do phosphating treatment on the surface of the steel, and then apply the water-based epoxy resin emulsion to improve the adhesion of the paint layer and the adhesion of the steel. Anti-corrosion ability, however, every time phosphating treatment is performed, there are many procedures, and it is necessary to choose a phosphating treatment substrate that does not react with the surface of the steel substrate and has good compatibility with water-based epoxy resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] A preparation method based on the above-mentioned self-emulsifying water-based epoxy phosphate anticorrosion emulsion, comprising the following steps:

[0020] 1) Add the epoxy resin body and co-solvent to a four-necked flask equipped with a thermometer reflux condenser feeding device and a stirring device at a mass ratio of 15-20:5-10, and mix evenly at a stirring rate of 200-600r Stir at / min and heat up to 90-100°C. After the epoxy resin body dissolves completely for 10-30 minutes, add 0.1-0.5 parts of phosphoric acid solution with a concentration of 16.5mol / L, and reflux for 1-2 hours to obtain modified epoxy resin. Phosphate;

[0021] 2) Stir the modified epoxy phosphoric acid at a stirring rate of 200-600r / min, and heat up to 110-120°C to dissolve, then add 1-5 parts of solvent, 1-5 parts of soft monomer, 1-5 parts A mixed solution of hard monomer, 1-5 parts of functional monomer, and 0.1-1.0 parts of initiator is reacted at a constant temperature of 115-120°C fo...

Embodiment 1

[0025] 1) Add epoxy resin E20 and co-solvent (propylene glycol methyl ether: n-butanol = 1:1) in a mass ratio of 2:1 to a four-necked flask equipped with a thermometer reflux condenser feeding device and a stirring device. Evenly, stir at a stirring rate of 200-600r / min and heat up to 90-100°C. After the epoxy resin E20 is completely dissolved for 20 minutes, add 0.33 parts of phosphoric acid with a concentration of 16.25mol / L, and reflux for 1-2 hours to obtain modification epoxy phosphate;

[0026] 2) Stir the modified epoxy phosphoric acid at a stirring rate of 200-600r / min, and heat up to 110-120°C to dissolve, then add 4.17 parts of propylene glycol methyl ether, 2.50 parts of butyl acrylate, 2.50 parts of styrene, 4.01 A mixed solution of 1 part of methacrylic acid and 0.50 part of benzoyl peroxide was reacted at a constant temperature of 115-120°C for 2-3 hours to obtain a mixed solution of epoxy resin;

[0027] 3) Cool down the epoxy resin mixed solution to 50-60°C, add...

Embodiment 2

[0030] 1) Add epoxy resin E20 and co-solvent (ethylene glycol butyl ether: n-butanol = 1:1) in a mass ratio of 2:1 to a four-neck flask equipped with a thermometer reflux condenser feeding device and a stirring device Mix in medium, stir at a stirring rate of 200-600r / min and heat up to 90-100°C. After the epoxy resin E20 is completely dissolved for 20 minutes, add 0.35 parts of phosphoric acid with a concentration of 16.25mol / L, and reflux for 1-2 hours to obtain Modified epoxy phosphate;

[0031] 2) Stir the modified epoxy phosphoric acid at a stirring rate of 200-600r / min, and heat up to 110-120°C to dissolve, then add 4.17 parts of ethylene glycol butyl ether, 2.53 parts of butyl acrylate, and 2.53 parts of methyl A mixed solution of methyl acrylate, 4.23 parts of methacrylic acid, and 0.51 parts of benzoyl peroxide was reacted at a constant temperature of 115-120°C for 2-3 hours to obtain a mixed solution of epoxy resin;

[0032] 3) Cool down the epoxy resin mixed soluti...

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Abstract

The invention discloses a self-emulsifying water-based epoxy phosphate anticorrosion emulsion, which comprises A component, B component and C component, and the weight percentage of the three is: 20-30: 10-15: 56-65; A group Parts include 15-20 parts of epoxy resin body, 5-10 parts of co-solvent, 0.1-0.5 parts of phosphoric acid-containing solution; the B component includes 1-5 parts of solvent, 1-5 parts of soft monomer, hard monomer 1-5 parts, 1-5 parts of functional monomer, 0.1-1.0 parts of initiator; the C component includes 1-5 parts of neutralizing agent and 55-60 parts of deionized water. The invention also discloses a preparation method of the self-emulsifying water-based epoxy phosphate anticorrosion emulsion. In the present invention, the epoxy resin body is firstly ring-opened and esterified, the phosphoric acid group is added to the epoxy resin body to form epoxy phosphate, and then the epoxy phosphate is grafted and modified, which enhances the adhesion between the coating film and the substrate, and prevents corrosion. The ability is good, and when the anticorrosion emulsion of the present invention is painted on the steel, it is not necessary to carry out phosphating treatment on the surface of the steel.

Description

technical field [0001] The invention belongs to the technical field of resin preparation, in particular to a self-emulsifying water-based epoxy phosphate anticorrosion emulsion and a preparation method thereof. Background technique [0002] The national economic loss caused by metal corrosion is relatively serious every year. In order to reduce metal corrosion, the use of coating anticorrosion is one of the most economical, effective and simple ways. Epoxy resin is widely used in various fields such as coatings, adhesives and composite materials based on its strong adhesion, good radiation resistance, good thermal stability, acid and alkali resistance, good insulation and high mechanical strength. . Although epoxy coatings have excellent physical and chemical properties, since traditional epoxy resin coatings are mostly solvent-based, the VOC content of organic compounds volatilized during use is high, which brings harm to the ecological environment and people's health. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/08C09D5/08C08G59/14C08F283/10C08F220/18C08F212/08C08F220/06C08F220/14
CPCC09D151/08C08F283/10C08G59/1488C09D5/08C08F220/18C08F220/1802C08F220/1804
Inventor 宋子强熊晓鲁德平管蓉
Owner HUBEI JIAJI SYNTHESIS MATERIALS CO LTD
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