High-performance waterborne double-component polyurethane metal paint composition and application thereof

A two-component polyurethane and metal coating technology, used in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of inability to achieve rapid cross-linking, slow carbodiimide reaction, and shortened paint shelf life. Avoid storage risk problems, improve reactivity, and improve the effect of boiling resistance

Pending Publication Date: 2019-05-14
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on the one hand, even under alkaline conditions, the polycarbodiimide crosslinking agent and the hydroxyacrylic resin will react slowly during the storage process, especially the pH of the hydroxypropyl resin will generally decrease during the storage process, which will further accelerate its reaction. On the other hand, the pH of the system is high after the two components are mixed, and the reaction of carbodiimide is slow, so it is impossible to achieve rapid crosslinking in the film forming process

Method used

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  • High-performance waterborne double-component polyurethane metal paint composition and application thereof
  • High-performance waterborne double-component polyurethane metal paint composition and application thereof
  • High-performance waterborne double-component polyurethane metal paint composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) The quality and raw material information of each component of the slurry of A component in the present embodiment are as follows:

[0060] raw material name

mass (g)

Grade

raw material supplier

water

20.0

/

/

Dispersant

3.5

BYK-190

BYK Company

Titanium dioxide

75.0

R-706

dupont

D

1.0

Surfynol 104BC

Evonik

Defoamer

0.5

Tego Airex904w

Evonik

[0061] The preparation of the slurry is carried out as follows: mix the water, dispersant, defoamer, and wetting agent in the above table and stir at a stirring speed of 200 rpm for 4 minutes, then add titanium dioxide and increase the stirring speed to Continue to stir at 1000 rpm for 15 minutes to obtain a uniformly mixed slurry; transfer it to a horizontal sand mill for 20 minutes to grind to a fineness of less than 10 microns, and filter through a 200-mesh gauze to obtain the slurry for later use.

[0062] (2) The ...

Embodiment 2

[0071] (1) The ratio of each component of the slurry of component A in this embodiment and the raw material information are as follows:

[0072]

[0073]

[0074] Its preparation method is as follows: mix the above-mentioned water, dispersant, defoamer, and wetting agent and stir at a stirring speed of 400 rpm for 3 minutes, then add pigments and fillers and increase the stirring speed to 1000 rpm to continue Stir for 10 minutes to obtain a uniformly mixed slurry; transfer it to a horizontal sand mill for 30 minutes to grind to a fineness of less than 10 microns, and filter through a 200-mesh gauze to obtain the slurry, which is set aside.

[0075] (2) The proportion and raw material information of component A are as follows:

[0076] raw material name

mass (g)

Grade

raw material supplier

Waterborne Hydroxy Acrylic Resin

65.0

Antkote2035

Wanhua Chemical Company

water

2.5

/

/

Neutralizer

0.1

N,N-Dimethylet...

Embodiment 3

[0083] (1) The ratio of each component of the slurry of component A in this embodiment and the raw material information are as follows:

[0084] raw material name

mass (g)

Grade

raw material supplier

water

20

/

/

Dispersant

3.8

BYK-190

BYK Company

Titanium dioxide

75.0

R-706

dupont

D

1.0

Surfynol 104BC

Evonik

Defoamer

0.5

Tego Airex904w

Evonik

[0085] Its preparation method is as follows: mix the above-mentioned water, dispersant, defoamer, and wetting agent and stir at a stirring speed of 400 rpm for 3 minutes, then add pigments and fillers and increase the stirring speed to 1000 rpm to continue Stir for 10 minutes to obtain a uniformly mixed slurry; transfer it to a horizontal sand mill and grind for 30 minutes to a fineness of less than 10 microns, and filter through a 200-mesh gauze to obtain the slurry, which is set aside.

[0086] (2) The proportion and raw ma...

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PUM

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Abstract

The invention discloses a high-performance waterborne double-component polyurethane metal paint composition which comprises a component A and a component B, wherein the component A to the component Bis 1:0.1-1: 0.5. The component A comprises, in weight percent, 30-70% of waterborne hydroxyl acrylic resin. The component B comprises, in weight percent, 40-80% of isocyanate curing agents, 10-30 parts of polycarbodiimide, preferably, according to the total weight of the component B, the component B further comprises trimethylchlorosilane, and the weight percent of the trimethylchlorosilane is lager than 0% and smaller than or equal to 5%. A film formed by the paint has the advantages of high hardness and gloss, good plumpness and low VOCs (volatile organic compounds). The film has excellent corrosion resistance, warm water resistance and water boiling resistance. The invention further provides an application of the metal paint composition.

Description

technical field [0001] The invention belongs to the technical field of water-based paint preparation methods, and specifically discloses a high-performance water-based two-component polyurethane metal paint composition and an application thereof. Background technique [0002] As a functional material, paint occupies a very important position in the national economy. The relatively authoritative book "Painting Technology" in the Chinese coatings industry defines it as follows: "Painting is a material that can be coated on the surface of an object by different construction techniques to form a firm adhesion, a certain strength, and a continuous coating. Solid film. The film formed in this way is commonly called a coating film, also known as a paint film or a coating." Coatings can provide protection and decoration for substrates (metal, wood, etc.). In recent years, the coatings industry, especially the Chinese coatings industry, has developed very rapidly. The World Federat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/61C08G18/79
Inventor 胡臻皓焦鑫许海超蒋荣
Owner WANHUA CHEM GRP CO LTD
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