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Epoxy ester resin water dispersion and method for manufacturing rust-inhibiting primer using the same as foundation

A technology of epoxy ester resin and anti-rust primer, which is applied in the direction of epoxy resin coating, anti-corrosion coating, coating, etc., can solve the problem of decreased hardness and water resistance of epoxy ester resin, poor film-forming property and anti-corrosion performance, Epoxy ester resin has high acid value, and achieves good water resistance, corrosion resistance, good film-forming performance, and good self-drying effect

Inactive Publication Date: 2012-07-11
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Comparing the water-based approaches of these epoxy ester resins at present, it is found that the water-dilutable epoxy ester resins have the following disadvantages: first, there are a large amount of organic solvents; second, in the current situation, the triethyl ether used The use of base amines in the coatings industry has been restricted; third, the acid value of epoxy ester resins is generally high, which reduces the hardness and water resistance of epoxy ester resins
Self-emulsifying epoxy ester resins have the following disadvantages: low emulsification efficiency; some resins need to be neutralized with amine (or ammonia) and other neutralizing agents; the obtained emulsion has low solid content
The way of adding emulsifier also has some disadvantages. For example, due to the use of a large amount of emulsifier, the emulsifier migrates to the surface of the paint film, which makes the water resistance of the paint film worse, and the film-forming and anti-corrosion properties become worse.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This example is intended to demonstrate the fabrication of epoxy ester resin emulsions.

[0041] (1) Synthetic epoxy ester resin

[0042] Add 108 g of linoleic acid, 432 g of linoleic acid and 90 g of xylene into the reaction vessel, and stir to raise the temperature. When the temperature is raised to 120°C, add epoxy resin and catalyst, continue to heat up to 240°C, and keep the reaction at this temperature until the acid value is 5mgKOH / g, then cool down to obtain epoxy ester resin. Wherein the grade of epoxy resin used is: E-12; Consumption is 540g. The name of the catalyst is: benzyltriethylammonium chloride; the dosage is 7.2g.

[0043] (2) Epoxy ester resin water-based

[0044] Dissolve 2 g of the associative thickener in 180 g of deionized water in advance to make an aqueous thickener solution for later use. Add the above-mentioned epoxy ester resin, reactive non-migrating surfactant, and co-solvent into an adjustable-speed high-speed stirring tank, and at th...

Embodiment 2

[0046] This example is intended to demonstrate the preparation of an antirust primer with the above-mentioned epoxy ester resin aqueous dispersion emulsion.

[0047] Add 3g of deionized water, 0.5g of defoamer, 0.6g of thickener, and 1g of ammonia water (25%) into a high-speed stirring tank, and stir evenly with an adjustable high-speed disperser. Add 9.8g of iron red paste, 4g of filler paste, 42.8g of zinc phosphate paste and 9g of ZP-10 paste, and stir evenly. Add 44g of epoxy ester aqueous dispersion emulsion, and finally add 4.4g of drier, adjust the viscosity with deionized water, and filter to obtain the epoxy ester resin aqueous dispersion emulsion antirust primer.

[0048] Table 1 is the specific formulation of the antirust primer based on the epoxy ester resin aqueous dispersion emulsion. The drier VXW-4940 in the table is a product provided by Solutia; the defoamer T-034 is provided by Shanghai Coating Research Institute; the dispersant BYK-190 is provided by BYK, ...

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Abstract

The invention discloses a manufacturing method of an epoxy-ester resin aqueous dispersion and the anti-corrosion primer on the basis of the epoxy-ester resin aqueous dispersion, characterized in that the aqueous dispersion is a self-drying core-shell structured aqueous dispersion emulsion with the epoxy resin as the core and the reactive non-transfer surfactant as the shell; the anti-corrosion primer has the epoxy-ester resin aqueous dispersion emulsion with acid value of 2 to 10 mg KOH / g, solid content ranging from 40 percent to 60 percent as the basic component. The construction performance, self-drying property and the paint film mechanical strength of the produced waterborne anti-corrosion primer are all comparable to the solvent type epoxy resin coating.

Description

technical field [0001] The present invention relates to a kind of resin emulsion that can be used to prepare environment-friendly water-based coating and the manufacturing method of the coating based on this emulsion, relate in particular to a kind of epoxy ester resin aqueous dispersion emulsion and based on this emulsion The manufacture method of antirust primer. Background technique [0002] In order to prevent corrosion of equipment components, in recent years, a series of anti-rust coatings have been developed in China, but most of them are solvent-based anti-rust coatings. This kind of paint contains not only a large amount of organic solvents that can pollute the environment, but also a large amount of toxic pigments, causing serious environmental problems. For this reason, the research and development of new environmentally friendly water-based antirust coatings is in line with the current development trend of the coatings industry. [0003] Epoxy ester resin antir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08J3/03C09D163/00C09D5/12
Inventor 孙凌赵其中
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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