Water-based acrylic finish paint and preparation method thereof

Abstract

The invention provides a water-based acrylic finish paint which comprises the following components in percentage by weight: 30-65% of water-based acrylic resin, 0.5-5% of dispersant, 0.1-5% of defoaming agent, 0.1-5% of base wetting agent, 10-30% of pigment and filler, 1-10% of pH regulator, 1-10% of thixotropic agent, 1-10% of flash etching inhibitor, 0.5-5% of film-forming assistant, 1-5% of light stabilizer and 5-20% of deionized water. The water-based acrylic finish paint provided by the invention is a single component paint, and is prepared from water-based acrylic resin used as a base, and multiple assistants. The water-based acrylic finish paint has the advantages of excellent aging resistance and high weather resistance. The experiment proves that the ultraviolet aging resistance of the water-based acrylic finish paint is up to 600 hours. In addition, the water-based acrylic finish paint also has the advantages of high thermal stability, favorable mechanical properties and outstanding freeze-thawing stability, satisfies the environmental-protection requirement, has a very high practical value, and is suitable for the occasions which require long-term aging resistance and have a high environmental-protection requirement.

Description

technical field

[0001] The invention relates to the field of coatings, in particular to a water-based acrylic topcoat and a preparation method thereof. Background technique

[0002] The topcoat is the final coating of the painting, which has higher requirements on the materials used, and is divided into solvent-based topcoats and water-based topcoats. Traditional topcoats are mostly solvent-based, but solvent-based topcoats use organic matter as solvents, which will cause VOC (volatile organic compound) emissions after painting, pollute the environment, and cause harm to human health.

[0003] Water-based topcoats use water as a solvent, are non-toxic, have no solvent odor, are more environmentally friendly than solvent-based topcoats, and can be used to paint buildings, railway rolling stock, etc. Water-based topcoats are prepared from water-based resins, water, pigments and additives. The key to research is water-based resins. After decades of development, the current mai...

Examples

preparation example Construction

[0049] The preparation method of waterborne acrylic topcoat provided by the invention may further comprise the steps:

[0050] a) Weigh deionized water, dispersant, pigments and fillers, pH regulator and thixotropic agent in proportion, mix and stir evenly at a speed of 1200 rpm to 1800 rpm, and then grind, preferably until the fineness is ≤40 μm ;

[0051] b) Add water-based acrylic resin, defoamer, substrate wetting agent, flash corrosion inhibitor, film-forming aid and light stabilizer in proportion to the mixture obtained in the previous step and stir at a speed of 1000 rpm to 1500 rpm / min;

[0052] c) filtering the mixture obtained in b) to remove impurities;

[0053] d) adjusting the pH of the mixture to 8-9 with an appropriate amount of pH regulator, and adjusting the viscosity of the mixture to ≥3.0 Pa·s with an appropriate amount of deionized water to obtain a topcoat;

[0054] The weight percentage content of each component is: 30% to 65% of water-based acrylic r...

Embodiment 1

[0056] a) Weigh 160kg of deionized water, 5kg of Tego740W dispersant from Degussa, 30kg of carbon black, 80kg of 800 mesh mica powder, 100kg of ultrafine barium sulfate, 12kg of AMP-95pH regulator from Dow Chemical Company and Degussa Sai fumed silica 8kg, mix and stir evenly, the speed is 1500 rpm, and then grind to fineness ≤ 40μm;

[0057] b) Weigh 550kg of HD2535 water-based acrylic resin from Huajinsi, 5kg of Degussa’s Tego825 defoamer, 3kg of Degussa’s KL245 substrate wetting agent, and 10kg of Raybo 75 flash corrosion inhibitor from U.S. Ruibao 1, Tinuvin 5050 ultraviolet absorber 20kg of Tinuvin 5050 ultraviolet absorber 20kg of the film-forming aid dodecyl alcohol ester of Eastman company and Ciba company add in the mixture that last step obtains and stir, and the rotating speed is 1200 revs / min;

[0058] c) filtering the mixture obtained in b) to remove impurities;

[0059] d) adjusting the pH of the mixture to 8.3, and adjusting the viscosity of the mixture to 3.4 ...

Embodiment 2

[0061] a) Take by weighing 120kg of deionized water, 20kg of BYK110 dispersant of German BYK chemical company, 30kg of carbon black, 50kg of 800 mesh mica powder, 80kg of silicon micropowder, 30kg of pH regulator triethanolamine and 70kg of hydrogenated castor oil, mix and stir evenly, The rotating speed is 1600 rpm, and then grind to a fineness of ≤40μm;

[0062] b) Weigh 450kg of water-based acrylic resin from Huafeile Water-based Coatings Co., Ltd., 30kg of HX-2013 defoamer from Guangzhou Huaxia Auxiliary Chemical Company, 30kg of SNW 311 substrate wetting agent from Guangdong Luochi Trading Co., Ltd., SER- Add AD FA379 Elements flash corrosion inhibitor 40kg, Qingzhou Beite Chemical Co., Ltd.’s film-forming aid 20kg and Shijiazhuang Shijiao Chemical Co., Ltd.’s hindered amine light stabilizer 944 into the mixture obtained in the previous step and stir at a speed of 1100 rpm;

[0063] c) filtering the mixture obtained in b) to remove impurities;

[0064] d) adjusting the ...

technical field

[0001] The invention relates to the field of coatings, in particular to a water-based acrylic topcoat and a preparation method thereof. Background technique

[0002] The topcoat is the final coating of the painting, which has higher requirements on the materials used, and is divided into solvent-based topcoats and water-based topcoats. Traditional topcoats are mostly solvent-based, but solvent-based topcoats use organic matter as solvents, which will cause VOC (volatile organic compound) emissions after painting, pollute the environment, and cause harm to human health.

[0003] Water-based topcoats use water as a solvent, are non-toxic, have no solvent odor, are more environmentally friendly than solvent-based topcoats, and can be used to paint buildings, railway rolling stock, etc. Water-based topcoats are prepared from water-based resins, water, pigments and additives. The key to research is water-based resins. After decades of development, the current mai...

Examples

preparation example Construction

[0049] The preparation method of waterborne acrylic topcoat provided by the invention may further comprise the steps:

[0050] a) Weigh deionized water, dispersant, pigments and fillers, pH regulator and thixotropic agent in proportion, mix and stir evenly at a speed of 1200 rpm to 1800 rpm, and then grind, preferably until the fineness is ≤40 μm ;

[0051] b) Add water-based acrylic resin, defoamer, substrate wetting agent, flash corrosion inhibitor, film-forming aid and light stabilizer in proportion to the mixture obtained in the previous step and stir at a speed of 1000 rpm to 1500 rpm / min;

[0052] c) filtering the mixture obtained in b) to remove impurities;

[0053] d) adjusting the pH of the mixture to 8-9 with an appropriate amount of pH regulator, and adjusting the viscosity of the mixture to ≥3.0 Pa·s with an appropriate amount of deionized water to obtain a topcoat;

[0054] The weight percentage content of each component is: 30% to 65% of water-based acrylic r...

Embodiment 1

[0056] a) Weigh 160kg of deionized water, 5kg of Tego740W dispersant from Degussa, 30kg of carbon black, 80kg of 800 mesh mica powder, 100kg of ultrafine barium sulfate, 12kg of AMP-95pH regulator from Dow Chemical Company and Degussa Sai fumed silica 8kg, mix and stir evenly, the speed is 1500 rpm, and then grind to fineness ≤ 40μm;

[0057] b) Weigh 550kg of HD2535 water-based acrylic resin from Huajinsi, 5kg of Degussa’s Tego825 defoamer, 3kg of Degussa’s KL245 substrate wetting agent, and 10kg of Raybo 75 flash corrosion inhibitor from U.S. Ruibao 1, Tinuvin 5050 ultraviolet absorber 20kg of Tinuvin 5050 ultraviolet absorber 20kg of the film-forming aid dodecyl alcohol ester of Eastman company and Ciba company add in the mixture that last step obtains and stir, and the rotating speed is 1200 revs / min;

[0058] c) filtering the mixture obtained in b) to remove impurities;

[0059] d) adjusting the pH of the mixture to 8.3, and adjusting the viscosity of the mixture to 3.4 ...

Embodiment 2

[0061] a) Take by weighing 120kg of deionized water, 20kg of BYK110 dispersant of German BYK chemical company, 30kg of carbon black, 50kg of 800 mesh mica powder, 80kg of silicon micropowder, 30kg of pH regulator triethanolamine and 70kg of hydrogenated castor oil, mix and stir evenly, The rotating speed is 1600 rpm, and then grind to a fineness of ≤40μm;

[0062] b) Weigh 450kg of water-based acrylic resin from Huafeile Water-based Coatings Co., Ltd., 30kg of HX-2013 defoamer from Guangzhou Huaxia Auxiliary Chemical Company, 30kg of SNW 311 substrate wetting agent from Guangdong Luochi Trading Co., Ltd., SER- Add AD FA379 Elements flash corrosion inhibitor 40kg, Qingzhou Beite Chemical Co., Ltd.’s film-forming aid 20kg and Shijiazhuang Shijiao Chemical Co., Ltd.’s hindered amine light stabilizer 944 into the mixture obtained in the previous step and stir at a speed of 1100 rpm;

[0063] c) filtering the mixture obtained in b) to remove impurities;

[0064] d) adjusting the ...

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