Ceramic coating and preparation method thereof and method for preventing cracking of ceramic coating

A technology for ceramic coatings and pigments, applied in coatings and other directions, can solve the problems of high cost, long drying cycle, cracking, etc., and achieve the effect of not increasing the cost

Active Publication Date: 2010-06-30
上海金力泰化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In order to solve the problem of cracking when the gel coat is thickly coated, the measures that have been reported include (referring to Chen Longwu, Wang Jue, "Supercritical drying method to prepare SiO 2 Research on Aerogel", Chemical Journal of Chinese Universities, 1995, Volume 16, Issue 6: 840-843; Lian Jinjun et al., "Preparation and Characterization of Nano-SnO2 by Sol-Gel Freeze-drying Technology", Chemical World, 2004 Issue 4: 171-174): (1) supercritical drying technology, (2) freeze drying technology, (3) gradient temperature drying method and other methods, but most of these methods are still in the initial stage of laboratory research or industrial application , the main reason is that the above methods either require complex equipment, or the drying cycle is too long, or the cost is too high, and cannot meet the needs of commercial production
[0017] In a word, due to the above-mentioned problems in the prior art, so far there is no low-cost method for preventing cracking of the ceramic coating film that meets the requirements of industrial applications.

Method used

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  • Ceramic coating and preparation method thereof and method for preventing cracking of ceramic coating
  • Ceramic coating and preparation method thereof and method for preventing cracking of ceramic coating
  • Ceramic coating and preparation method thereof and method for preventing cracking of ceramic coating

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preparation example Construction

[0078] In a second aspect of the present invention, a method for preparing a ceramic coating is provided, the method comprising:

[0079] Mix the above components A and B in a weight ratio of 2-3:1-2, stir and mature at room temperature for 3 hours or longer, so that the alkoxysilane in component B is hydrolyzed and mixed with The metal oxide sol in component A undergoes polycondensation reaction or itself undergoes polycondensation reaction to form a sol-gel ceramic coating.

[0080] In a third aspect of the present invention, there is provided a method for increasing the cracking film thickness of a ceramic coating, the ceramic coating is prepared based on a sol-gel method, the method comprising:

[0081] The above ceramic coating is sprayed onto the surface of the metal substrate treated by sandblasting to form a coating, and cured at 160-180° C. for 20 minutes to form a thick-film (40-50 μm) ceramic coating.

[0082] Refer to the accompanying drawings below.

[0083] i...

Embodiment 1-4

[0096] Using the same paint mixing and construction method as in Comparative Example 1, the difference is that part of the flaky aluminum hydroxide is used to replace the titanium dioxide in the formula, so that the sum of the two weights is 35 parts by weight.

[0097] Table 1

[0098]

Embodiment 5-10

[0100] The preparation, aging and construction methods of the paint are the same as in Comparative Example 1, except that the flake pigments are replaced by sericite powders of different particle sizes. The sheet diameter ratio is in the range of 6-150. The specific proportioning and test results are shown in Table 2 below.

[0101] Table 2

[0102]

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Abstract

The invention relates to a ceramic coating and a preparation method thereof, and a method for preventing cracking of the ceramic coating. The invention provides the ceramic coating, which comprises the following components: a component A which consists of a metal oxide sol, a coloring pigment, a lamellar pigment, an oriented auxiliary agent and water, wherein the grain diameter of the lamellar pigment is between 1 and 80mum, while the tablet diameter ratio thereof is between 5 and 100; and a component B which is prepared by mixing at least two alkoxy silanes with different hydrolysis rates, wherein the weight ratio of the component A to the component B is 2-3:1-2, and the solid content of the component A is between 20 and 45 by weight percent. The invention also provides the preparation method of the ceramic coating, and the method for preventing cracking of the ceramic coating.

Description

technical field [0001] The invention belongs to the field of chemical coatings, and relates to a novel ceramic coating, a preparation method thereof, and a method for preventing ceramic coating film from cracking. Specifically, the present invention relates to an inorganic ceramic coating film prepared by a sol-gel method, the coating film is a cured mixture consisting of a sol (A component) containing flake pigments, two or more alkoxysilanes After mixing, the agent (B component) is hydrolyzed and matured to form a gel solution with a certain viscosity, which is applied to the sandblasted metal substrate by spraying, and then the coating film is hardened at high temperature to form an improved cracking. Thick ceramic coating film. The ceramic coating film can be used for the decoration of aluminum curtain walls, the anticorrosion of metal materials, or the coating for the purpose of improving the non-stickiness, wear resistance and thermal-oxidative aging resistance of metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/00
Inventor 郭家振潘士祥潘军辉林宏骞刑宪礼
Owner 上海金力泰化工股份有限公司
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