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Self-crosslinking sulfonate-base epoxy ester aqueous dispersion and anti-corrosive primer thereof

A technology based on epoxy ester and anti-rust primer, which is applied in the direction of epoxy resin coating, anti-corrosion coating, coating, etc., can solve the problems of difficult control of the reaction process, decline of paint film performance, poor storage stability, etc. Good effect of cross-linking, dense paint film and good mechanical stability

Active Publication Date: 2012-05-30
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of preparation method also has the following disadvantages: (1) the reaction process is not easy to control, and gelation occurs easily; (2) in the synthesis process, due to the consumption of unsaturated double bonds on a large amount of fatty acids, the later stage dryness of the resin is due to The lack of unsaturated double bonds does not increase much; (3) the acid value of the resin is high, and the water resistance of the paint film is poor; (4) it needs to be neutralized with a large amount of organic amine (or ammonia), which has an unpleasant smell and is poisonous to the human body Function; (5) The pH value of the dispersion is generally above 8.5. At this high pH value, the ester group of the epoxy ester is easily hydrolyzed, which reduces the performance of the paint film
Since the emulsion is prepared by phase inversion emulsification, it has the disadvantages of coarse latex particle size and poor storage stability

Method used

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  • Self-crosslinking sulfonate-base epoxy ester aqueous dispersion and anti-corrosive primer thereof
  • Self-crosslinking sulfonate-base epoxy ester aqueous dispersion and anti-corrosive primer thereof
  • Self-crosslinking sulfonate-base epoxy ester aqueous dispersion and anti-corrosive primer thereof

Examples

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Effect test

Embodiment 1

[0046] This example aims to demonstrate the synthesis of aqueous dispersions of sulfonate-based epoxy esters and their preparation methods

[0047] Listed in Table 1 is the synthetic formulation example of the sulfonate-based epoxy ester aqueous dispersion, and Table 2 is the performance index of all sulfonate-based epoxy ester aqueous dispersions corresponding to Table 1.

[0048] The preparation method of listed sulfonate base epoxy ester aqueous dispersion in table 1 is:

[0049] Add the epoxy resin, fatty acid, sulfonate group-containing functional monomer and catalyst into the reaction bottle, and start to heat up after passing nitrogen for 10-20 minutes. When the temperature rises to 100-150°C, the material melts and starts to stir. Continue to heat up to 200-240°C, keep warm for esterification reaction, and then cool down when the acid value is 8-20mgKOH / g. When the temperature drops to 160-180°C, add the formulating amount of co-solvent, and continue to cool down to 3...

Embodiment 2

[0056] This example is intended to demonstrate an example formulation of an anti-corrosion primer based on a sulfonate-based aqueous dispersion and its preparation. Listed in table 3 is the formula example of the antirust primer with sulfonate base epoxy ester water dispersion as base material, and table 4 is the base material with sulfonate base epoxy ester water dispersion in corresponding table 3 Performance indicators of various antirust primers.

[0057] Table 3 takes the sulfonate-based epoxy ester aqueous dispersion as the base material antirust primer formulation example

[0058]

[0059] According to the formula listed in table 3, the method for base material antirust primer with sulfonate base epoxy ester aqueous dispersion is as follows:

[0060] (1) Add the formulated amount of deionized water, dispersant and defoamer into the dispersing tank, and stir at a speed of 600-800rpm for 15-30 minutes to make the materials evenly mixed;

[0061] (2) Add the inert ant...

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Abstract

The invention relates to a self-crosslinking sulfonate-base epoxy ester aqueous dispersion and an anti-corrosive primer thereof. The self-crosslinking sulfonate-base epoxy ester aqueous dispersion is characterized in that the aqueous dispersion is prepared by introducing a sulfonate functional monomer into epoxy resin, wherein vegetable oil or fatty acid, the epoxy resin and the functional monomer containing a sulfonate base undergo esterification reaction in the presence of a catalyst; when the acid value is qualified, a latent solvent and a neutralizing agent are added into the mixture; andfinally, the mixture is diluted by deionized water to obtain the sulfonate-base epoxy ester aqueous dispersion. An aqueous anti-corrosive primer prepared by using the epoxy ester aqueous dispersion as a base material has excellent storage stability, and waterproof and anti-corrosive properties.

Description

technical field [0001] The present invention relates to the coating industry in the field of chemical industry, in particular to a water-based technology of epoxy ester resin, in particular to an epoxy resin obtained by grafting sulfonate groups onto the epoxy ester molecular chain. The aqueous ester dispersion and its preparation method also relate to a self-crosslinking epoxy ester aqueous dispersion anti-rust base prepared from the sulfonate-based epoxy ester aqueous dispersion, which is non-toxic, environmentally friendly, and has excellent antirust performance. Lacquer and its preparation method. Background technique [0002] Traditional solvent-based coatings need to use a large amount of organic solvents, which not only causes a large consumption of organic solvents, but also causes serious pollution to the environment. In order to save resources and protect the environment, countries all over the world have turned their attention to non-pollution or low-pollution wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/14C09D163/10C09D5/08
Inventor 赵其中
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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