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Nanostructured hybrid sol-gel coatings for surface protection

A technology for mixing sols and coatings, applied in sol preparation, gel preparation, thixotropic coatings, etc., and can solve problems such as poor adhesion

Pending Publication Date: 2022-01-14
克斯塔斯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using standard hybrid sol-gels as direct replacements for chrome-based paints on bare metal, one of the core challenges is poor adhesion between the two surfaces

Method used

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  • Nanostructured hybrid sol-gel coatings for surface protection
  • Nanostructured hybrid sol-gel coatings for surface protection
  • Nanostructured hybrid sol-gel coatings for surface protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125]

[0126]

[0127] In all examples, methacrylic acid (MAAH) was used as a chelating agent.

[0128] The following methods are implemented:

[0129] (a) Hydrolysis of organosilanes to form silane sols

[0130] By using HNO with a volume ratio of 1:0.75 3 A 0.01 M aqueous solution hydrolyzed MAPTMS (61.22 g) to achieve organosilane hydrolysis (below this ratio, precipitation of zirconium species occurred during the second hydrolysis). Since MAPTMS and water are immiscible, hydrolysis proceeds in a heterogeneous manner. After stirring for 20 min, sufficient methanol was formed to mix everything present in solution.

[0131] (b) Zirconium chelation to form a zirconium complex

[0132] MAAH (5.30 g) was added dropwise to ZPO (28.25 g) at a molar ratio of 1:1, MAAH reacted with ZPO reagent to form modified zirconium alkoxide Zr(OPr) 4-2X (MAA) X , where MAA is the deprotonated form of MAAH.

[0133] (c) Combination of organosilane zirconium to form Si / Zr so...

Embodiment 2

[0140] Method steps are carried out as in Example 1, and consumption is as follows:

[0141]

Embodiment 3

[0143] Method steps are carried out as in Example 1, and consumption is as follows:

[0144]

[0145] The coatings of the present invention provide surprisingly effective protection of metallic coatings and fulfill all of the above mentioned coating requirements.

[0146] According to the second aspect of the invention, and figure 2 (and Figure 4 ), 6 kinds of sol-gel compositions (F001-F006) were prepared as follows:

[0147]• The silane precursor (A) is first mixed with a magnetic stirrer until homogeneous. Next, 0.1 M nitric acid in deionized water was added to the silane mixture to hydrolyze the alkoxide functional groups. At this stage, 25% of the alkoxide groups were hydrolyzed. Add 0.1M HNO dropwise 3 catalyst to avoid shaking the silane mixture.

[0148] Simultaneously, the transition metal (ZPO and / or TIOP) is chelated with methacrylic acid to form the metal complex (B) (this is not the case for F005, where APTES is used). Methacrylic acid chelates the x2 ...

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PUM

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Abstract

The present invention provides highly densified hybrid sol-gel coatings with surfaces functionalised with highly adherent inorganic chemistries. The invention also provides methods for preparing the hybrid sol-gel coatings of the present invention. Advantageous embodiments of the hybrid sol-gel coating and of the method of preparation, respectively, are provided in the dependent claims. Preferably, the present invention provides a highly densified hybrid sol-gel coating based on the interconnectivity of two hybrid networks formed from a methacrylate silane and a transition metal complex.

Description

technical field [0001] The present invention relates to nanostructured hybrid sol-gel coatings for surface protection. [0002] Background of the invention [0003] The present invention is particularly useful for providing coatings on metal surfaces, however it should be understood that the coatings of the present invention may also be used on plastic surfaces, including metal coated plastic surfaces and 3D printed / additively manufactured products. [0004] Metals are used as structural materials in many industries, including construction, mechanical and electrical engineering, transportation and medical. The most commonly used metals are iron, aluminum, copper, titanium and zinc. [0005] Iron is the second most abundant metal in the earth's crust after aluminum, and its production exceeds that of all other metals combined. 98% of iron is used to make various forms of steel (stainless steel, mild steel, and others), mainly used in the construction, engineering, and transp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00
CPCB01J13/0004C08G77/58C09D183/14B01J13/0039B01J13/0047B01J13/0052C08G77/06C08G77/20C09D183/06C09D5/04C08K5/544C08K5/3475C08K3/36C08K5/56C09D7/61C09D7/20C08G77/08C09D5/028
Inventor 布兰登·达菲穆罕默德·阿卜哈詹姆斯·肯尼迪
Owner 克斯塔斯科技有限公司