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Metal coating as well as preparation method and application thereof

A coating and metal technology, applied in the field of metal coatings and its preparation, can solve the problems of inconvenience, stains, unmentioned self-healing performance, hydrophobic performance and stability performance, and achieve good protection ability, broad application prospects, good The effect of self-healing properties

Active Publication Date: 2021-07-02
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, as time goes by, cracks, scratches, and stains will appear on the paint film formed by the paint, which will seriously affect the aesthetics of the apparent structure. cause a certain degree of inconvenience
[0005] CN103666148B discloses a kind of anticorrosion and fireproof metal paint, comprises following components and the mass percentage of each component is: acrylic resin 20-27%; Epoxy resin 13-18%; Amino resin 7-13%; Silicate 4- 10%; Flame retardant 1-2%; Pigment 8-22%; Auxiliary 1-4%; Cosolvent 1-4%; Water 30-45%; Good self-healing performance, hydrophobicity and stability are not mentioned

Method used

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  • Metal coating as well as preparation method and application thereof
  • Metal coating as well as preparation method and application thereof
  • Metal coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0043] In a specific embodiment, the self-repairing polyurethane elastomer was prepared by: 6 parts by mass of 3,6-disulfide-1,8-octanediol was dissolved in DMSO as a chain extender, and the 25 was added thereto. The molecular weight of the substantially 1000-3000 is 1000 to 3,000 polyurethane prepolymers, after 24 h at 50 ° C, soaking the reaction product soaked, washing, washing, freeze, and freeze, it can obtain the self-repair Polyurethane elastomer.

preparation example 2

[0045] The difference from Preparation Example 1 is only that 3,6-di - 1,8-octaned diol is replaced by the same mass N'1, N'6 bis ((E) -4-hydroxybenzyl) Adipidyl hydrazide.

preparation example 3

[0047] In a specific embodiment, the modified filler was prepared in the following manner:

[0048] Step (1), 100 kg of resin filler silica was dried under 100-120 ° C for 4-6 hours, and then cooled to normal temperature under vacuum conditions, the resin filler of 0.8 kg was taken, and it was treated with 20 L toluene. Mixing, the mixture was dispersed at room temperature for 30-60 min to give a suspension mixture, and 0.364 kg of silane coupling agent KH-550 was added to the suspension mixture, and the ultrasonic treatment suspended mixture was 5-10 min, and then carried out at 90 ° C. The reactive reaction was 6-8h, and the reaction liquid was completely separated at normal temperature at normal temperature, that is, the resulting insoluble material is a resin filler modified surface passing the silane coupling agent;

[0049] Step (2), the surface of the surface obtained in 10 kg step (2) is dispersed by a resin filler modified by the silane coupling agent in a aqueous solutio...

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Abstract

The invention provides a metal coating as well as a preparation method and application thereof. The metal coating comprises polyurethane acrylic resin, epoxy acrylate, a self-repairing polyurethane elastomer, a modification filler, hydrophobic spherocrystals and a photoinitiator; the self-repairing polyurethane elastomer is obtained by mixing dihydric alcohol containing a disulfide bond and / or dihydric alcohol containing an acylhydrazone bond with a polyurethane prepolymer and conducting polymerizing; the modification filler is a matrix filler of which the surface is modified by a silane coupling agent and rare earth ions; and the hydrophobic spherocrystal is a hydrophobic spherocrystal of a micro-nano structure formed by crystallizing a hydrophobic substance, and the micro-nano structure comprises a micron-sized crystal nucleus and a nano-sized crystal whisker growing on the surface of the crystal nucleus. The coating has good self-repairing performance, mechanical performance, hydrophobic performance and stability performance on the premise that the basic performance of the coating is met, the metal surface can be well protected after the metal surface is coated with the coating, and wide application prospects are achieved.

Description

Technical field [0001] The present invention belongs to the field of coatings, and involves a metal coating and a preparation method thereof. Background technique [0002] Metal coating is suitable for steel anti-rust, metal sign decoration, aluminum-like doors and windows protection, high-grade deluxe cars, aviation equipment, etc. For most metals, there is vulnerable, and the external environment in which the metal is complicated, which is easy to cause external damage such as wear, scratch, etc., which is the problem that the metal coating needs to be solved. [0003] In general, the metal surface has a layer of oxide film before painting the UV coating. Since this film causes the surface energy to reduce, the adhesion of the metal UV coating and other properties are metal UV coatings to metal substrates. The problem. [0004] In addition, over time, the paint film formed by the coating will have cracks, scratches, and stains, which will seriously affect the aesthetic structur...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D163/10C09D175/04C09D7/62C09D7/63
CPCC09D175/14C09D163/10C09D7/62C09D7/63C09D5/18C08L2205/02C08L2205/03C08L2201/08C08L63/10C08L75/04C08K9/06C08K3/36C08K5/09C08L75/14
Inventor 赵平王民庆闫二虎狄崇祥张广法于立岩谢广文杜芳林
Owner QINGDAO UNIV OF SCI & TECH
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