Chromium-free low-temperature curing water-based zinc-aluminum coating as well as preparation method and application thereof

A zinc-aluminum coating, water-based technology, applied in anti-corrosion coatings, fire-resistant coatings, coatings, etc., can solve problems such as cracking, high energy consumption, and loss of protective performance

Active Publication Date: 2022-03-15
BOMEX CHEM SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent application CN 1172135A pointed out that the traditional chrome-free water-based zinc-aluminum coating needs to be cured at 320-360°C for 30 minutes, and the coating disclosed in CN 1172135A requires The curing and baking temperature is 355°C, the energy consumption is very high, and the coating performance is not damaged, and the service life is only 300°C/1h; in addition, there are also chromium-free water-based zinc-

Method used

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  • Chromium-free low-temperature curing water-based zinc-aluminum coating as well as preparation method and application thereof
  • Chromium-free low-temperature curing water-based zinc-aluminum coating as well as preparation method and application thereof
  • Chromium-free low-temperature curing water-based zinc-aluminum coating as well as preparation method and application thereof

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preparation example Construction

[0050] The present invention also provides a preparation method for the chrome-free low-temperature curing water-based zinc-aluminum coating described in the above technical solution, comprising the following steps:

[0051] mixing the first co-solvent and thickener, and mixing the obtained first mixture, dispersant, defoamer and zinc-aluminum antirust powder to obtain the zinc-aluminum paste;

[0052] Mixing water, a second co-solvent and a passivator to obtain a second mixture;

[0053] Mixing the water-soluble silicone resin and the curing accelerator to obtain a third compound;

[0054] The second mixture and the third mixture are mixed to perform a hydrolysis reaction, and the obtained hydrolyzed material solution is mixed with an aqueous nano inorganic silicate to perform a hybridization reaction to obtain the aqueous silicon slurry.

[0055] In the present invention, each component in the preparation method is consistent with each component in the chromium-free low-tem...

Embodiment 1

[0092] Carry out the preparation of chromium-free low-temperature curing water-based zinc-aluminum coating according to the substance consumption in Table 1:

[0093] Mix the first co-solvent and thickener at 25°C, and mix the obtained first mixture, dispersant, defoamer and zinc-aluminum antirust powder at 30°C to obtain the zinc-aluminum paste;

[0094] Mixing water, a second co-solvent and a passivating agent at 25°C to obtain a second mixture;

[0095] Mixing the water-soluble silicone resin and the curing accelerator to obtain a third compound;

[0096] Mix the second mixture with the third mixture, stir at room temperature for 3.5 hours to carry out a hydrolysis reaction, mix the obtained hydrolyzed feed solution with aqueous nano-inorganic silicate, and stir at room temperature for 1.5 hours to carry out a hybridization reaction to obtain the Water-based silicon paste;

[0097] The obtained zinc-aluminum paste and water-based silicon paste are mixed according to a mas...

Embodiment 2

[0109] Carry out the preparation of chromium-free low-temperature curing water-based zinc-aluminum coating according to the substance consumption of table 3:

[0110] Mix the first co-solvent and thickener at 25°C, and mix the obtained first mixture, dispersant, defoamer and zinc-aluminum antirust powder at 30°C to obtain the zinc-aluminum paste;

[0111] Mixing water, a second co-solvent and a passivating agent at 25°C to obtain a second mixture;

[0112] Mixing the water-soluble silicone resin and the curing accelerator to obtain a third compound;

[0113] Mix the second mixture with the third mixture, stir at room temperature for 3 hours to carry out hydrolysis reaction, mix the obtained hydrolyzed feed solution with aqueous nano-inorganic silicate, stir at room temperature for 1 hour to carry out hybridization reaction, and obtain the water-based silicon pulp;

[0114] The obtained zinc-aluminum paste and water-based silicon paste are mixed according to a mass ratio of 6...

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Abstract

The invention belongs to the technical field of zinc-aluminum coatings, and particularly relates to a chromium-free low-temperature curing water-based zinc-aluminum coating as well as a preparation method and application thereof. The invention provides a chromium-free low-temperature curing water-based zinc-aluminum coating. The chromium-free low-temperature curing water-based zinc-aluminum coating comprises zinc-aluminum slurry and water-based silicon slurry which are independently subpackaged, the zinc-aluminum paste comprises the following components: zinc-aluminum antirust powder, a dispersing agent, a first cosolvent, a defoaming agent and a thickening agent; the water-based silicon slurry comprises the following components: water-soluble organic silicon resin, water-based nano inorganic silicate, a curing accelerator, a passivator, a second cosolvent and water. The chromium-free low-temperature curing water-based zinc-aluminum coating provided by the invention has the characteristics of low curing temperature and long high-temperature service life.

Description

technical field [0001] The invention belongs to the technical field of zinc-aluminum coatings, and in particular relates to a chrome-free low-temperature curing water-based zinc-aluminum coating and a preparation method and application thereof. Background technique [0002] The brake disc is an extremely important part of the car braking system, which is directly related to the safety of car users; the chrome-free water-based zinc-aluminum coating is environmentally friendly and has excellent salt spray resistance, and is widely used in the protective coating of car brake discs. Applications. [0003] Chinese patent application CN 1172135A pointed out that the traditional chrome-free water-based zinc-aluminum coating needs to be cured at 320-360°C for 30 minutes. The undamaged life of the coating is only 300°C / 1h; in addition, there are chromium-free water-based zinc-aluminum low-temperature, self-drying coatings, such as the coatings disclosed in Chinese patent application...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/10C09D7/61
CPCC09D183/04C09D5/106C09D7/61C09D5/18C08K3/34C08K3/08C08K7/00Y02E10/50
Inventor 林银丹
Owner BOMEX CHEM SHANGHAI
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