Phosphate-modified waterborne epoxy ester resin and anti-corrosive primer thereof, and preparation methods of phosphate-modified waterborne epoxy ester resin and anti-corrosive primer

A technology of epoxy ester resin and epoxy resin, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of low hardness, slow drying of paint film, poor early water resistance, etc., to achieve increased crosslinking density, fast drying speed, good mechanical stability

Pending Publication Date: 2022-02-15
上海华谊涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Water-based epoxy ester resin has good antirust performance and is widely used in water-based steel structure coatings. However, the current water-based epoxy ester resin still has problems such as slow drying of the paint film, low hardness, and poor early water resistance.

Method used

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  • Phosphate-modified waterborne epoxy ester resin and anti-corrosive primer thereof, and preparation methods of phosphate-modified waterborne epoxy ester resin and anti-corrosive primer
  • Phosphate-modified waterborne epoxy ester resin and anti-corrosive primer thereof, and preparation methods of phosphate-modified waterborne epoxy ester resin and anti-corrosive primer
  • Phosphate-modified waterborne epoxy ester resin and anti-corrosive primer thereof, and preparation methods of phosphate-modified waterborne epoxy ester resin and anti-corrosive primer

Examples

Experimental program
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Effect test

preparation example Construction

[0131] The preparation method of described waterborne epoxy ester antirust primer, comprises the steps:

[0132] (1) Add deionized water into the dispersion kettle and start stirring;

[0133] (2) While stirring, add neutralizer, wetting and dispersing agent and defoamer in sequence;

[0134] (3) under the condition of stirring, slowly add the water-based epoxy ester resin C modified by phosphoric acid ester to dilute it into a uniform emulsion;

[0135] (4) While stirring, slowly add pigments, anti-rust pigments and fillers, after stirring evenly, grind with a sand mill until the fineness is less than 30 microns, then transfer to the paint mixing kettle;

[0136] (5) While stirring, add water-based drier, leveling agent and thickener to the paint mixing kettle in sequence;

[0137] (6) Check the pH value and viscosity, adjust the pH value to 7.5 to 8.5, and the T-4 cup viscosity to be 60-100 seconds;

[0138] (7) filter with 120 mesh filter screens, pack, promptly obtain w...

Embodiment 1

[0150] Preparation of Epoxy Phosphate Prepolymer A1~A4

[0151] Put the epoxy resin, vegetable oil fatty acid and catalyst into the reaction bottle, raise the temperature to 135°C, keep it warm for 2-3 hours, until the acid value is less than 5mgKOH / g; cool down to 95°C, mix the phosphate compound and the co-solvent evenly, Use a dropping funnel to add dropwise into the reaction bottle for reaction. Since it is an exothermic reaction, the drop rate should be controlled, and the dropwise addition is completed in 1.5 hours; Epoxy Phosphate Prepolymer A. The formulations of epoxy phosphate prepolymers A1-A4 are listed in Table 1.

[0152] Table 1 The formula of epoxy phosphate prepolymer A1~A4

[0153]

[0154]

Embodiment 2

[0156] Preparation of Epoxy Ester Prepolymer B1~B4

[0157] Put the epoxy resin, vegetable oil fatty acid and catalyst into the reaction bottle, raise the temperature to 135°C, start stirring after the material melts; gradually raise the temperature to 225°C, and react at this temperature until the acid value is 10mgKOH / g, then start to cool down; cool down to Below 160°C, add co-solvent at 150°C to obtain epoxy ester prepolymer B. The formulations of epoxy ester prepolymers B1-B4 are listed in Table 2.

[0158] Table 2 The formula of epoxy ester prepolymer B1~B4

[0159] B1 B2 B3 B4 vegetable oil fatty acid Linoleic Acid 44.2 36 44.2 36 oleic acid 0.8 0.8 epoxy resin E-12 30 27 22.5 36 E-06 27 22.5 E-03 15 18 catalyst Benzyltriethylammonium chloride 0.036 0.036 Zinc oxide 0.04 0.036 Co-solvent Ethylene glycol butyl ether 30 15 15 ...

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Abstract

The invention relates to phosphate-modified waterborne epoxy ester resin and an anti-corrosive primer thereof, and preparation methods of the phosphate-modified waterborne epoxy ester resin and the anti-corrosive primer. A scheme provided by the invention comprises the phosphate-modified waterborne epoxy ester resin and the preparation method thereof. The waterborne epoxy ester anti-rust primer with excellent anti-rust performance is prepared by taking the phosphate-modified waterborne epoxy ester resin as a base material and cooperatively using a non-toxic and efficient anti-rust pigment. Compared with the prior art, epoxy resin and phosphoric acid are esterified to synthesize epoxy phosphate, then the epoxy phosphate and acrylate monomers are subjected to graft copolymerization, so the phosphate modified waterborne epoxy ester resin with excellent performance is prepared, and the salt spray resistance of the anti-rust primer is further improved.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings, and in particular relates to a phosphate-modified water-based epoxy ester resin, an antirust primer and a preparation method thereof. Background technique [0002] In recent years, a series of anti-rust coatings have appeared on the market, but most of them are solvent-based anti-rust coatings. This kind of paint not only contains a large amount of organic solvents, but also contains a large amount of toxic pigments, causing serious pollution to the environment. Epoxy ester antirust paint is widely used in the field of metal antirust due to its excellent antirust performance. Epoxy ester resin is made by esterification reaction of epoxy resin and vegetable oil fatty acid. Therefore, epoxy ester has many excellent properties of epoxy resin and drying oil at the same time. Compared with alkyd resin, epoxy ester resin has higher hydrolysis resistance and has more excellent antirust pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14C08G59/16C08F290/06C08F212/08C08F220/14C08F220/18C08F230/02C08F230/08C08F220/06C09D151/08C09D5/08C09D7/20
CPCC08G59/1422C08G59/1472C08F290/064C09D151/08C09D5/08C09D7/20C08F212/08C08F220/14C08F220/1804C08F230/02C08F230/085C08F220/06
Inventor 赵其中刘卫峰刘逸昕李小林江政翰
Owner 上海华谊涂料有限公司
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