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Water-soluble epoxy paint, and preparing technique thereof

A water-soluble epoxy and paint technology, applied in the direction of epoxy resin paint, coating, latex paint, etc., can solve the problems of fried spots, shrinkage cavity on the paint film surface, high production cost, etc., and achieve the suppression of bubble generation and process Simple conditions and high production efficiency

Inactive Publication Date: 2011-04-27
乳源瑶族自治县阳之光亲水箔有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the baking film-forming temperature of water-soluble epoxy resin coatings on the market is generally around 180 degrees, and the required baking time is generally more than 20 minutes.
Higher baking temperature and longer baking time affect production efficiency, resulting in higher production costs, and during coating, such as some plastics, metal aluminum, zinc and some alloys in such a long baking Under the baking temperature and baking time, it is easy to produce aliasing and deformation, which affects the application of water-based coatings; at the same time, due to the high content of defoamers in some water-soluble epoxy resin coatings on the market, it is easy to cause defoaming when breaking the foam. Shrinkage cavities or fried spots are formed on the surface of the paint film, which makes the leveling effect of the paint poor
In addition, some water-soluble epoxy coatings also have the problems of poor adhesion and poor anti-aging effect, which causes the coated paint film to fall off and lose color after a period of time.
In addition, some water-soluble epoxy coatings also have the problem of poor storage stability
Since water-soluble epoxy coatings mainly use water as a solvent, even if various surfactants and emulsifiers are added to the coating formula to improve the compatibility and water solubility of the components, it is still difficult to achieve the traditional preparation process. All ingredients blend together synergistically without compromising individual properties

Method used

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  • Water-soluble epoxy paint, and preparing technique thereof
  • Water-soluble epoxy paint, and preparing technique thereof
  • Water-soluble epoxy paint, and preparing technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Get 70g of bisphenol A type epoxy resin, 25g of ethylene glycol, and 5g of polyethylene glycol and put it into the reactor, and the stirring speed is 600 rpm, and at a temperature of 120°C, the ring-opening addition reaction is carried out, and the reaction time is 5 hours, made modified epoxy resin 100g;

[0059]Take 120 g of allyl phosphate and 80 g of acrylate and put them into a reaction kettle, and carry out polymerization reaction at a stirring speed of 600 rpm and a temperature of 120°C for 5 hours to prepare 200 g of phosphoric acid-modified acrylic resin.

[0060] Get modified epoxy resin 100g by above-mentioned formula 1, phosphoric acid modified acrylic resin 200g, solvent: ethylene glycol monobutyl ether 50g, propylene glycol methyl ether 10g, butanol 10g, be 600 rev / min at stirring speed, at temperature At 150°C, the grafting reaction was carried out for 8 hours. Cool the grafted polymer to 60°C, dilute 70g of pH adjuster ammonia water with the remaining 4...

Embodiment 2

[0062] Get 110g of bisphenol F type epoxy resin, 15g of ethylene glycol, and 15g of polyethylene glycol and put it into the reactor, and at a stirring speed of 500 rpm, at a temperature of 120°C, carry out ring-opening addition reaction, and the reaction time is 10 hours, made modified epoxy resin 140g;

[0063] Take 120 g of allyl phosphate and 40 g of acrylate and put them into a reaction kettle, and carry out polymerization reaction at a stirring speed of 500 rpm and a temperature of 120° C. for 10 hours to prepare 160 g of phosphoric acid modified acrylic resin.

[0064] According to the above formula 2, take 140g of modified epoxy resin, 160g of phosphoric acid modified acrylic resin, 60g of ethylene glycol monobutyl ether solvent, and carry out grafting reaction for 8 hours at a stirring speed of 600 rpm and a temperature of 150°C. . The grafted polymer is cooled to 70°C, and after dilute 60g of the pH regulator diglycolamine with the remaining 445g of water, slowly add...

Embodiment 3

[0066] Take 125g of bisphenol F epoxy resin, 15g of ethylene glycol, 15g of polyethylene glycol, and 15g of bisphenol A and put them into the reaction kettle, and carry out the ring-opening addition reaction at a stirring speed of 1000 rpm and a temperature of 130°C , the reaction time is 2 hours, and 170g of modified epoxy resin is made; 65g of allyl phosphate and 65g of acrylate are put into the reactor, and the stirring speed is 1000 rpm, and the temperature is 130°C, and the polymerization reaction is carried out , and the reaction time was 2 hours; 130 g of phosphoric acid-modified acrylic resin was prepared.

[0067] According to the above formula 3, take 140g of modified epoxy resin, 160g of phosphoric acid modified acrylic resin, 60g of ethylene glycol monobutyl ether solvent, and 10g of propylene glycol methyl ether, at a stirring speed of 1000 rpm, at a temperature of 150°C, carry out The grafting reaction was 8 hours. Cool the grafted polymer to 60°C, dilute 50g of...

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Abstract

The invention relates to the technical field of coating, in particular to a water-soluble epoxy coating and a preparation technique thereof. As phosphoric acid modified acrylics and catalysts are added in the coating, the baking film-forming temperature of the coating is reduced from 180 DEG C to between 120 DEG C and 140 DEG C; the baking film-forming time is reduced from 20 minutes to be within5 minutes; simultaneously, a foam killer and a flatting agent are added; the foam killer and the flatting agent cooperate for restraining air bladders from generating, thus leading a paint film afterbeing dried to be incapable of generating the phenomena of spot explosion and cavity shrinkage; besides, an ultraviolet suction powder agent is selectively added, thus leading the coating to have ultraviolet suction capacity; the product after being coated can maintain fresh color even if under the sunshine for a long period; the preparation technical condition is simple and is easy to be met; and moreover, the production efficiency is high.

Description

Technical field: [0001] The invention relates to the technical field of epoxy coatings, in particular to a water-soluble epoxy coating and a production process thereof. Background technique: [0002] Traditional oil-based paints are often flammable and explosive, and there are great safety hazards in production, transportation, storage and use, and most of the oil-based paints contain toxic solvents such as benzene, which are more harmful to the human body and bring serious harm. Environmental issues. In recent years, water-based coatings have become more and more popular in the market because they do not contain benzene solvents and have no environmental and safety issues caused by flammability and explosion. Compared with oil-based coatings, water-based coatings are more excellent in acid resistance, water resistance, salt spray resistance, etc., and the coatings are easy to apply, no matter spraying, dipping, roller coating or machine dyeing, there are no disadvantages, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D133/14C09D5/02C09D7/00
Inventor 马志君
Owner 乳源瑶族自治县阳之光亲水箔有限公司