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Preparation methods of metal surface treatment agent containing nano boron nitride and corrosion-resistant coating

A technology of metal surface treatment and nano-boron nitride, which is applied in the preparation of metal surface treatment agents and corrosion-resistant coatings, and in the field of corrosion-resistant coatings, can solve the problems of poor anti-corrosion effects of organic coatings, and achieve super High corrosion resistance, good bonding force, good high temperature resistance and lubricating performance

Active Publication Date: 2016-10-12
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the invention provides a metal surface treatment agent containing nano-boron nitride and a preparation method thereof for a corrosion-resistant coating, said metal surface treatment agent containing nano-boron nitride The preparation method of the agent and the corrosion-resistant coating thereof shall solve the technical problem that the anti-corrosion effect of the organic coating in the prior art is not good

Method used

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  • Preparation methods of metal surface treatment agent containing nano boron nitride and corrosion-resistant coating
  • Preparation methods of metal surface treatment agent containing nano boron nitride and corrosion-resistant coating
  • Preparation methods of metal surface treatment agent containing nano boron nitride and corrosion-resistant coating

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Embodiment 1

[0039] First, mix commercially available boron nitride nanosheets and urea and calcinate them at 300°C to obtain modified boron nitride nanosheets with amino groups, which will be dissolved in water and ultrasonically mixed uniformly so that the mass fraction of the solute will be 0.5% boron nitride The aqueous dispersion is added to the waterborne polyurethane. Then, the solute mass fraction of 5% silane coupling agent KH-550 aqueous dispersion was added to the water-based polyurethane to form a mixed solution. Wherein, the mass fraction of the polyurethane in the waterborne polyurethane accounts for 93.5% of the solute. Then add 0.5% carbodiimide, 0.3% palm oil and 0.2% ammonium zirconium carbonate, accounting for solute mass fraction. A certain amount of deionized water is added so that the mass fraction of the solvent in the total solution is 55%-85%, and the metal surface treatment agent is formed after uniform mixing.

Embodiment 2

[0041] First, mix commercially available boron nitride nanosheets and urea and calcinate them at 300°C to obtain modified boron nitride nanosheets with amino groups, which will be dissolved in water and ultrasonically mixed uniformly so that the mass fraction of the solute will be 1% boron nitride The aqueous dispersion is added to the waterborne polyurethane. Then, the solute mass fraction of 10% silane coupling agent KH-550 water dispersion was added to the water-based polyurethane to form a mixed solution. Wherein, the mass fraction of the polyurethane in the water-based polyurethane accounts for 88% of the solute. Then add 0.3% carbodiimide, 0.3% palm oil and 0.4% ammonium zirconium carbonate, accounting for solute mass fraction. A certain amount of deionized water is added so that the mass fraction of the solvent in the total solution is 55%-85%, and the metal surface treatment agent is formed after uniform mixing.

Embodiment 3

[0043]First, mix the commercially available boron nitride nanosheets and urea and calcinate them at 300°C to obtain modified boron nitride nanosheets with amino groups, which will be dissolved in water and ultrasonically mixed uniformly so that the mass fraction of the solute will be 2% boron nitride The aqueous dispersion is added to the waterborne polyurethane. Then, the water dispersion of silane coupling agent KH-550 with a solute mass fraction of 20% was added to the water-based polyurethane to form a mixed solution. Wherein, the mass fraction of the polyurethane in the waterborne polyurethane accounts for 77.1% of the solute. Then add 0.4% carbodiimide, 0.2% palm oil and 0.3% ammonium zirconium carbonate, accounting for solute mass fraction. A certain amount of deionized water is added so that the mass fraction of the solvent in the total solution is 55%-85%, and the metal surface treatment agent is formed after uniform mixing.

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Abstract

The invention provides a metal surface treatment agent containing nano boron nitride. The metal surface treatment agent is prepared from waterborne resin, a dispersing agent, boron nitride and coating additives, wherein the mass of the solid component in the waterborne resin is 77%-93.5% that of the total solid components of a coating, the mass of the dispersing agent is 5%-20% that of the total solid components of the coating, the mass of boron nitride is 0.5%-2% that of the total solid components of the coating, and the mass of the coating additives is 0.5%-1% that of the total solid components of the coating. The invention further provides a preparation method of the metal surface treatment agent containing nano boron nitride and a method for preparing a corrosion-resistant coating. It is proved through salt spray tests that the composite coating has ultra-high corrosion resistance. The metal surface treatment agent is waterborne paint, the formula does not contain any solvent except water, therefore, emission of volatile organic compounds does not exist, and the metal surface treatment agent meets the environmental protection requirement and is suitable for surface corrosion prevention of metal substrates in industrialized production.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a corrosion-resistant coating, in particular to a metal surface treatment agent containing nano boron nitride and a preparation method of the corrosion-resistant coating. Background technique [0002] Metal surface treatment agents and their coatings are a method used to prevent chemical corrosion of metals and cause unnecessary economic losses. Commonly used organic coatings have certain anti-corrosion ability, but because water and oxygen can penetrate the organic coating and reach the metal substrate, the corrosion resistance of the coating is limited. [0003] Prior art CN201010573734.0 uses hexagonal boron nitride, carbon nanotubes, aluminum nitride, magnesium nitride, silicon carbide, curing agent, etc. to compound and prepare anti-corrosion and heat-dissipating powder coatings. [0004] Existing technology CN201410555295.9 Composite organosilicon hybrid cross-linking resin w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C09D5/08B05D7/14B05D7/24
CPCB05D7/14B05D7/24B05D2502/00B05D2503/00B05D2504/00B05D2601/20C08K3/38C08K9/02C08K9/04C08K2003/385C08K2201/011C09D5/08C09D5/18C09D7/63C09D7/70C09D175/04
Inventor 李静甘灵珠姜志远崔锦灿杨俊和
Owner UNIV OF SHANGHAI FOR SCI & TECH
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