Water-based paint based on solvent type polyurethane curing agent and preparation method of water-based paint

A polyurethane curing agent and water-based coating technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor water resistance, high cost, and poor thickness of the bursting film, and achieve good bursting film thickness and low cost price , good water resistance

Inactive Publication Date: 2021-02-05
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

However, the cost of the hydrophilic modified polyurethane curing agent is high, and the introduced hydrophilic groups lead to poor water resistance. After the hydrophilicity is improved, side reactions with water are prone to produce carbon dioxide, resulting in a difference in the thickness of the bubble film.

Method used

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  • Water-based paint based on solvent type polyurethane curing agent and preparation method of water-based paint
  • Water-based paint based on solvent type polyurethane curing agent and preparation method of water-based paint
  • Water-based paint based on solvent type polyurethane curing agent and preparation method of water-based paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation process is as follows:

[0042] ①Put 8.00 parts of deionized water in the first plastic tank, then add 0.20 parts of the anti-settling agent at a speed of 300 RPM, then gradually increase the speed to 3000 RPM, and keep stirring for 20 minutes to make an anti-settling slurry for later use;

[0043] ②Add the remaining 17.00 parts of deionized water to the second plastic tank, then add the 3.00 parts of the dispersant and the anti-settling slurry prepared in step ① at a speed of 1500RPM; then add 3.0 parts of coloring pigments at 500RPM, Stir for 10 minutes; add 0.30 part of defoamer at 1500RPM and stir at 2000RPM for 20 minutes;

[0044] ③Put the product prepared in step ① and step ② into the dispersion cylinder and grind for an hour at 2500RPM until the fineness is less than 10μm, then filter the colored slurry for later use;

[0045] ④Put 61.60 parts of self-made water-based acrylic resin 1 into the third plastic tank, and then add 5.00 parts of cosolv...

Embodiment 2

[0051] The preparation process is as follows

Embodiment 2

[0053] ①Put 8.00 parts of deionized water in the first plastic tank, then add 0.20 parts of the anti-settling agent at a speed of 300 RPM, then gradually increase the speed to 3000 RPM, and keep stirring for 20 minutes to make an anti-settling slurry for later use;

[0054] ②Add the remaining 2.00 parts of deionized water to the second plastic tank, then add the 1.00 parts of the dispersant and the anti-settling slurry prepared in step ① at a speed of 1500RPM; then add 8.50 parts of coloring pigments at 500RPM, Stir for 10 minutes; add 0.10 parts of defoamer at 1500RPM and stir at 2000RPM for 20 minutes;

[0055] ③Put the product prepared in step ① and step ② into the dispersion cylinder and grind for an hour at 2500RPM until the fineness is less than 10μm, then filter the colored slurry for later use;

[0056] ④Put 75.00 parts of self-made water-based acrylic resin 2 into the third plastic tank, and then add 4.00 parts of cosolvent, 0.50 parts of wetting agent and the color p...

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Abstract

The invention relates to a water-based paint based on a solvent type polyurethane curing agent, which comprises a component A and a component B. The component A is mainly prepared from the following components in parts by mass: water-based hydroxy acrylic resin, a cosolvent, a dispersing agent, a pigment filler, a wetting agent, an anti-settling agent, a pH regulator, a defoaming agent, an anti-flash-rust agent, a thickening agent and deionized water. The water-based hydroxyl acrylic resin is a water-based hydroxyl acrylic resin secondary dispersion. The solvent type polyurethane curing agentis applied to the water-based paint, and the cost of the curing agent is only 1 / 2-1 / 3 of that of a hydrophilic modified polyurethane curing agent. The water resistance of the product is better than that of a common coating using a hydrophilic modified polyurethane curing agent.

Description

technical field [0001] The invention relates to a water-based paint based on a solvent-type polyurethane curing agent and a preparation method thereof. Background technique [0002] With the development of society and the continuous improvement of people's living standards, water-based coatings have become a key development direction. Among them, water-based two-component acrylic polyurethane coatings are the most important direction of water-based coatings because of their excellent performance and convenient construction. Water-based two-component acrylic polyurethane coating is made of water-based hydroxyl acrylic resin, with certain pigments and fillers, co-solvents, additives and hydrophilic modified polyurethane curing agent. However, the hydrophilic modified polyurethane curing agent is expensive, and because of the need for hydrophilic modification, the process cost increases, and the content of active groups decreases, and the price of unit active groups further in...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61C09D7/65
CPCC09D175/04C09D7/61C09D7/65
Inventor 秦玉猛姜美佳陈小军付绍祥洪杰
Owner 三棵树(上海)新材料研究有限公司
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