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Paint containing waterborne alkyd resin and preparation method of paint

A technology of water-based alkyd resin and water-based acrylic, which is applied in the direction of epoxy resin coatings, anti-corrosion coatings, polyester coatings, etc., can solve the problems of low solid content in construction, difficult to achieve, and discounted stability, so as to reduce potential safety hazards, The effect of uniform and dense film formation and increased stability

Inactive Publication Date: 2015-08-19
BEIJING JINHWEILI APPLIED CHEM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low solid content of water-based coatings, it is difficult to achieve the high decorative effect of the soluble type.
[0004] Since alkyd resin contains epoxy group, benzene ring and other structures, it has high hardness, excellent metal adhesion, good weather resistance and strong corrosion resistance. It is widely used in anti-corrosion primers or topcoats and floors. Epoxy resin itself is insoluble in water and can only be dissolved with organic solvents such as acetone or various esters. During the construction process, a large number of toxic and harmful solvents will volatilize, which not only seriously threatens the health of construction workers, but also causes great harm to the environment. massive pollution and destruction
At present, there is a process of emulsifying and dispersing epoxy resin with an emulsifier, but it is difficult to achieve a high solid content, and its stability is also greatly reduced. Even after the film is formed, the density of the film itself is difficult to match with solvent-based paints. Therefore, it is of great significance to develop a water-based coating that can meet the requirements of high solid content, good stability and low VOC content in construction.

Method used

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  • Paint containing waterborne alkyd resin and preparation method of paint
  • Paint containing waterborne alkyd resin and preparation method of paint
  • Paint containing waterborne alkyd resin and preparation method of paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Add 22 parts of trimethylolpropane, 8 parts of benzoic acid, and 0.01 part of organotin catalyst into the reaction flask, raise the temperature from 170°C to 230°C in 3 hours, keep the column temperature below 105°C, and react until the acid value is less than 3mgKOH / g, add 22 parts of dehydrated ricinoleic acid, 17 parts of isophthalic acid, and 0.02 parts of organotin catalyst, gradually raise the temperature to 230°C, control the column temperature below 105°C, react until the acid value is less than 5mgKOH / g, and cool down to 170°C, Add 6.5 parts of trimellitic anhydride, 0.01 part of catalyst, react at 180°C until the acid value is 45-50mgKOH / g, cool down to 160°C, add 21 parts of ethylene glycol butyl ether, 1.4 parts of butanol, and stir evenly to obtain a water-based water-based alkyd resin. The acid value of the resin is about 33mgKOH / g, and the solid content is about 75%. According to the dilution ratio of 1:1, it is diluted with propylene glycol methyl ether ...

Embodiment 2

[0038] Put 18 parts of trimethylolpropane and 1.1 parts of benzoic acid into the reaction bottle, raise the temperature from 170°C to 230°C in 3 hours, keep the column temperature below 105°C, react until the acid value is less than 3mgKOH / g, add soyoleic acid 24.5 parts, 3.8 parts of oleic acid, 17 parts of phthalic anhydride, gradually raise the temperature to 230°C, control the column temperature below 105°C, react until the acid value is less than 5mgKOH / g, cool down to 170°C, add 4.9 parts of trimellitic anhydride, and react to the acid value at 180°C 45-50mgKOH / g, lower the temperature to 160°C, add 14 parts of ethylene glycol ether and 8 parts of isopropanol, stir well to obtain a water-based alkyd resin, in which the acid value of the resin is about 33mgKOH / g, and the solid content is about 73%. . According to the dilution ratio of 1:1, dilute with propylene glycol methyl ether to obtain a viscosity of 50-100cp, add 100 parts of the obtained resin, add 5 parts of neutr...

Embodiment 3

[0040] Add 21 parts of trimethylolpropane, 7.7 parts of benzoic acid, and 0.01 part of organotin catalyst into the reaction flask, raise the temperature from 170°C to 230°C in 3 hours, keep the column temperature below 105°C, and react until the acid value is less than 3mgKOH / g, add 3 parts of dehydrated ricinoleic acid, 18 parts of linolenic acid, 17 parts of isophthalic acid, 0.02 parts of organotin catalyst, gradually raise the temperature to 230°C, control the column temperature below 105°C, and react until the acid value is less than 5mgKOH / g , lower the temperature to 170°C, add 5.9 parts of trimellitic anhydride, 0.01 part of catalyst, react at 180°C until the acid value is 45-50 mgKOH / g, lower the temperature to 160°C, add 10 parts of ethylene glycol butyl ether, 15 parts of butanol, and stir evenly to obtain Water-based alkyd resin, the acid value of the resin is about 35mgKOH / g, and the solid content is about 75%. According to the dilution ratio of 1:1, it is dilute...

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Abstract

The invention belongs to the field of waterborne coatings, and relates to a waterborne alkyd resin and an aqueous dispersion thereof. The formula of the waterborne alkyd resin comprises 18-33 parts of unsaturated fatty acid, 17-26 parts of trimethylolpropane, 1-8.8 parts of benzoic acid, 0-0.055 parts of a catalyst, 14-20 parts of phthalic anhydride or m-phthalic acid, 5-7.7 parts of trimellitic anhydride and 20-25 parts of a cosolvent. 4-6 Parts of a neutralizer is added to 100 parts of the synthesized waterborne alkyd resin, and the obtained mixture is stirred and dispersed in 100-150 parts of water in order to obtain the aqueous dispersion of the waterborne alkyd resin. 2-8 Parts of a drier, a pigment filler and an assistant are added to the dispersion to prepare a waterborne primer or finish. Benzoic acid substitutes parts of fatty acids, so the hardness and the dryness of the alkyd resin are improved; and the resin is water soluble resin and adopts water as a diluent when the resin is used, so the emission of VOC is greatly reduced, VOC decreases to below 15% from about 70% of solvent based paints, the environment is improved, damages to the human body are reduced, and hidden fire hazards are also reduced.

Description

technical field [0001] The invention relates to a coating of water-based alkyd resin and a preparation method thereof, belonging to the field of water-based coatings. Background technique [0002] At present, solvent-based coatings are mainly used in the market to protect various industrial products with metal substrates, which can play the role of anti-rust, anti-corrosion, and decoration. The carrier is a volatile organic solvent, which will volatilize to the atmosphere during the film forming process, causing pollution and harm to the environment and human health. [0003] As the film-forming substance of water-based paint, water-based resin, the solid content, viscosity and VOC content of its aqueous dispersion play a decisive role in the performance of the paint film and the impact on the environment. Therefore, water-based paint is more and more popular as a low-VOC content paint. Applications. However, due to the low solid content of water-based paints, it is diffic...

Claims

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Application Information

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IPC IPC(8): C09D167/06C09D163/10C09D133/00C09D5/08C09D7/12
Inventor 张扬秦文
Owner BEIJING JINHWEILI APPLIED CHEM PROD
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