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Preparation method of ultra-quick-drying water-based two-component acrylic acid refinishing paint

A two-component, acrylic technology, applied in the field of paints, can solve the problems of accelerating the reaction between hydroxyl groups and polyurethane curing agents, inconvenient repairs, slow drying, etc.

Inactive Publication Date: 2021-04-23
三棵树(上海)新材料研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, the present invention provides a method for preparing an ultra-fast-drying water-based two-component acrylic repair paint, which solves the defects of the traditional water-based two-component acrylic finish paint that is slow to dry and inconvenient to repair. Organotin driers or other metal driers accelerate the reaction between the hydroxyl group and the polyurethane curing agent, and change the solvent used to dilute the polyurethane curing agent into a solvent that evaporates faster to achieve the purpose of quick drying

Method used

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  • Preparation method of ultra-quick-drying water-based two-component acrylic acid refinishing paint
  • Preparation method of ultra-quick-drying water-based two-component acrylic acid refinishing paint
  • Preparation method of ultra-quick-drying water-based two-component acrylic acid refinishing paint

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preparation example Construction

[0029] The preparation method of the B component is as follows: 300.00-500.00 parts by mass of an organic solvent and 500.00-700.00 parts by mass of a low-viscosity polyurethane curing agent are stirred at 1000 RPM for 10 minutes.

[0030] Further, the organic solvent is propylene glycol methyl ether acetate.

[0031] Further, the ratio of hydroxyl content to NCO content in components A and B is 1:1.2 to 1.5. When in use, components A and B are mixed at a mass ratio of 6:1, and then added to account for the mass of the mixture Dilute with deionized water with a fraction of 10% to 20% and stir evenly, filter with a 200-mesh filter, and then use a 1.3mm caliber air spray gun to spray on the original topcoat with 320# sandpaper machine grinding defects, and dry naturally. A repair coating with a thickness of 30-50 μm is obtained.

[0032] In order to solve the defects of traditional water-based two-component acrylic topcoats that are slow to dry and inconvenient to repair, the p...

Embodiment 1

[0034] The present invention comprises A and B two components.

[0035]The preparation process of component A is as follows: ①Put 40.00 parts (parts by mass, the same below) of deionized water in the first plastic tank, and then add 1.00 parts of Bentone DE (Deqian Hemings Chemical Co., Ltd. ), then gradually increase the rotating speed to 3000RPM, continue to stir for 20 minutes, and make anti-settling slurry for subsequent use;

[0036] ② Add 210.00 parts of deionized water to the second plastic tank, then add 30.00 parts of dispersant BYK-190 (Byk Chemical Co., Ltd.) and the anti-settling slurry prepared in step ① at a speed of 1500 RPM; then add 30.0 parts at 500 RPM Part MA-100 carbon black pigment (Mitsubishi Chemical Co., Ltd.), stirred at 1500RPM for 10 minutes; added 3.00 parts of defoamer Tego 810 (Evonik Degussa Chemical Co., Ltd.) at 1500RPM and stirred at 2000RPM for 20 minutes;

[0037] ③Put the product prepared in step ② into the dispersion cylinder and grind i...

Embodiment 2

[0044] The present invention comprises A and B two components.

[0045] Wherein the preparation process of component A is as follows: ① put 80.00 parts (parts by mass, the same below) of deionized water in the first plastic tank, and then add 2.00 parts of Bentone DE (Deqian Hemings Chemical Co., Ltd. ), then gradually increase the rotating speed to 3000RPM, continue to stir for 20 minutes, and make anti-settling slurry for subsequent use;

[0046] ②Add 170.00 parts of deionized water to the second plastic tank, then add 20.00 parts of dispersant BYK-2015 (Byk Chemical Co., Ltd.) and the anti-settling slurry prepared in step ① at a speed of 1500 RPM; then add 100.0 parts at 500 RPM 1 part of CINILEX DPP RED SR1C (Xenike Pigment Co., Ltd.), stirred at 1500RPM for 10 minutes; added 2.00 parts of antifoaming agent Tego 810 (Evonik Degussa Chemical Co., Ltd.) at 1500RPM and stirred at 2000RPM for 20 minutes;

[0047] ③Put the product prepared in step ② into the dispersion cylinde...

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Abstract

The invention relates to a preparation method of ultra-quick-drying water-based two-component acrylic acid refinishing paint. The ultra-quick-drying water-based two-component acrylic acid refinishing paint comprises a component A and a component B. The method comprises the steps: mixing the component A and the component B according to the mass ratio of 6: 1. then adding the organic tin drier into the polyurethane curing agent, uniformly stirring, filtering by using a 200-mesh filter screen, spraying on the original finishing coat with defects polished by a 320 # abrasive paper machine by using an air spray gun with the caliber of 1.3 mm, and naturally drying to obtain the repair coating with the thickness of 30-50 [mu] m. The organic tin drier is introduced to catalyze the reaction between hydroxyl and the polyurethane curing agent, and the solvent with high volatilization speed is adopted to dilute the curing agent so as to achieve a quick-drying effect. Acetylacetone is introduced to chelate tin ions in the organic tin drier so that the problems of paint film blistering, low bubble film thickness, short activation period and the like caused by too fast reaction between water and a polyurethane curing agent due to too fast early reaction are avoided.

Description

technical field [0001] The invention relates to the technical field of paints, in particular to a preparation method of an ultra-fast-drying water-based two-component acrylic repair paint. Background technique [0002] Due to its high gloss, high fullness, and excellent physical and chemical properties, water-based acrylic dispersions are widely used in construction machinery, rail transit, commercial vehicles, agricultural vehicles and other industries for water-based two-component acrylic topcoats using it as the main resin. Coating experts from Sany Heavy Industry, CRRC and other companies shared their experience in the large-scale successful application of water-based two-component acrylic topcoats on their production lines at the 18th Annual Waterborne Technology Conference, and also raised a new question The point is the repair of water-based paint. In the field of construction machinery, due to the characteristics of its production line, after the workpiece is painte...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/63C09D7/20
CPCC09D175/04C09D7/20C09D7/63C08K5/07C08K5/57
Inventor 秦玉猛姜美佳付绍祥洪杰
Owner 三棵树(上海)新材料研究有限公司
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