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High-performance water-based alkyd resin as well as preparation method and application thereof

A water-based alkyd resin, high-performance technology, applied in the field of coating materials, can solve the problems of increasing the water absorption rate of the coating film, poor stain resistance, shortening the service life of the paint film, etc., and achieve the effect of reducing VOC emissions

Pending Publication Date: 2021-05-25
山东奔腾漆业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although compared with traditional solvent-based alkyd resins, water-based alkyd resins meet the requirements of environmental protection and low harm in today's society, but their development is relatively slow
The main reason is that the water-based system has its unique properties compared with the solvent-based system, which determines that there must be many problems in the production of water-based alkyd resins: (1) The latent heat of evaporation of water is large, which prolongs the drying time of the paint film; (2) The surface tension of water is large, which will adversely affect the dispersion and coating performance of pigments, and the stain resistance is relatively poor; (3) There are certain restrictions on the coating material, which is difficult to apply to water (4) Water-based alkyd resin generally needs to be neutralized by adding amine to form a salt before it becomes water-soluble, so it is usually weakly alkaline, with a pH of about 7.5-8.0, and the ester bond in the resin is in the alkali Hydrolysis is prone to occur under aggressive conditions, thus affecting the storage stability of the paint and other film properties; (5) Too many hydrophilic groups in the molecular chain will increase the water absorption of the film, affect water resistance, and shorten the life of the film. service life
However, the performance of alkyd resin still needs to be further improved

Method used

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  • High-performance water-based alkyd resin as well as preparation method and application thereof
  • High-performance water-based alkyd resin as well as preparation method and application thereof
  • High-performance water-based alkyd resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of high-performance water-based alkyd resin comprises the following steps:

[0025] (1) Put ricinoleic acid, trimethylolpropane, catalyst, and solvent into a three-necked flask equipped with a water separator, a thermometer, and stirring, raise the temperature to 210°C for 1 hour, continue to heat up to 245°C, and keep the acid value below 8mg KOH / g, cool down to below 145°C, then add 4,5-dimethoxyphthalic anhydride, raise the temperature to 175°C, react until the acid value is 41-45mg KOH / g, cool down, vacuumize to remove the solvent, that is The compound shown in formula (I) is obtained; the molar ratio of ricinoleic acid, trimethylolpropane, and 4,5-dimethoxyphthalic anhydride is 1:2:3;

[0026] 249.6 g of the reaction product was obtained, m / z=842.45, see figure 1 .

[0027] (2) At 0°C, under the protection of nitrogen, add BBr3 dropwise, and the time from the dropwise addition to the completion of the reaction is 1 hour to obtain the compou...

Embodiment 2

[0030] The preparation method of high-performance water-based alkyd resin comprises the following steps:

[0031] (1) Put ricinoleic acid, trimethylolpropane, catalyst, and solvent into a three-necked flask equipped with a water separator, a thermometer, and stirring, raise the temperature to 210°C and keep it for 1h, then continue to heat up to 230°C, and keep the acid value below 8mg KOH / g, cool down to below 145°C, then add 4,5-dimethoxyphthalic anhydride, raise the temperature to 175°C, react until the acid value is 41-45mg KOH / g, cool down, vacuumize to remove the solvent, that is The compound shown in formula (I) is obtained; the molar ratio of ricinoleic acid, trimethylolpropane, and 4,5-dimethoxyphthalic anhydride is 1:3:2;

[0032] 198.6 g of the reaction product was obtained.

[0033] (2) At -10°C, under the protection of nitrogen, add BBr3 dropwise, and the time from the dropwise addition to the completion of the reaction is 2 hours to obtain the compound shown in ...

Embodiment 3

[0036] The preparation method of high-performance water-based alkyd resin comprises the following steps:

[0037] (1) Put ricinoleic acid, trimethylolpropane, catalyst, and solvent into a three-necked flask equipped with a water separator, a thermometer, and stirring, raise the temperature to 210°C for 1 hour, continue to heat up to 240°C, and keep the acid value lower than 8mg KOH / g, cool down to below 145°C, then add 4,5-dimethoxyphthalic anhydride, raise the temperature to 175°C, react until the acid value is 41-45mg KOH / g, cool down, vacuumize to remove the solvent, that is The compound shown in formula (I) is obtained; the molar ratio of ricinoleic acid, trimethylolpropane, and 4,5-dimethoxyphthalic anhydride is 1:2.5:2.5;

[0038] 295.3 g of the reaction product was obtained.

[0039] (2) At -20°C, under the protection of nitrogen, add BBr3 dropwise, and the time from the dropwise addition to the completion of the reaction is 1.5h to obtain the compound shown in formula...

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Abstract

The invention provides high-performance water-based alkyd resin, further provides a preparation method of the high-performance water-based alkyd resin, and further provides an application of the modified alkyd resin in alkyd resin coating. According to the waterborne alkyd resin provided by the invention, the ultralow-VOC and high-solid-content waterborne alkyd resin is prepared from a special monomer, so that a high-solid-content and low-viscosity technology of waterborne coating is realized, the technical problem that high-solid-content solvent type coating cannot be waterborne is solved, and VOC emission is further reduced.

Description

technical field [0001] The invention relates to the field of coating materials, in particular to a high-performance water-based alkyd resin and its preparation method and application. Background technique [0002] Alkyd resin is a resin synthesized by the reaction of fatty acids, polyols and polyacids through polyester. It has the advantages of easy availability of raw materials and excellent performance, and is widely used in the coating industry. With the development of industry, more and more attention has been paid to the problem of environmental pollution. Due to the high content of volatile organic compounds (VOC) in traditional solvent-based organic coatings, a large amount of organic solvents will be released during the construction and drying process, which poses a great threat to the environment and human health. In addition, the current environmental protection regulations of various countries are also more and more strict to the regulations on VOC emissions. The...

Claims

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Application Information

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IPC IPC(8): C08G63/21C08G63/78C08G63/91C09D167/08
CPCC08G63/21C08G63/78C08G63/914C09D167/08
Inventor 沈岳梁淑华
Owner 山东奔腾漆业股份有限公司
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