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A chemically bonded metal anti-corrosion water-based paint and preparation method thereof

A metal anti-corrosion, water-based coating technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings and other directions, can solve the problems of no chemical bonding, contradictory concepts, no chemical bonding between resin and substrate, etc., to shorten the reaction time, Enhanced adhesion and good emulsion stability

Active Publication Date: 2021-12-28
BEIJING ODYSSEY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Although there have been many related patent reports, the following problems still exist in terms of patented technical content: 1. The use of solvents to varying degrees is contrary to the global concept of water-based coatings that reduce VOC emissions; 2. Each component of the coating is Independent, only mixed by physical mixing means, without chemical bonding; 3. Covered and formed on the metal substrate by heating and curing, the resin and the substrate have no chemical bonding

Method used

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  • A chemically bonded metal anti-corrosion water-based paint and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] 1. Component A: add 100 parts of epoxy resin and 150 parts of acetone into the three-necked flask reactor respectively, control 350r / min, heat at 30°C and mix and dissolve, then add 1 part of phosphomolybdic acid, then dropwise add 1 part of phosphoric acid and Mixture of 50 parts of acetone, heat up to 50°C, reflux for 2.5 hours, cool to room temperature, add 200 parts of water, stir at 1450r / min for 30 minutes, add 1.5 parts of manganese carbonate, 1.5 parts of nickel carbonate, further chemical bonding under stirring, according to Triethanolamine needs to be added to adjust the pH.

[0047] 2. Component B: 100 parts of zinc powder and aluminum powder are mixed according to the ratio of 7:1. After conventional degreasing, wash with absolute ethanol, add 1:1 ethylene glycol, 1.5 parts of ceric sulfate, stir at room temperature 350r / min 3.5h for chemical passivation, add 10 parts of iron phosphorus powder, 1 part of white carbon black, add 10 parts of water, continue st...

Embodiment 2

[0050] 1. Component A: respectively add 100 parts of epoxy resin and 200 parts of methyl pyrrolidone into the three-necked flask reactor, control 250r / min, heat at 35°C, mix and dissolve, add 1.5 parts of aluminum dihydrogen phosphate, and then drop Add a mixture of 1.5 parts of phosphoric acid and 100 parts of methylpyrrolidone, heat up to 60°C, reflux for 3 hours, cool to room temperature, add 120 parts of water, stir at 1650r / min for 20min, add 1.0 parts of manganese carbonate, 0.7 parts of nickel carbonate, and stir For further chemical bonding, trimethylamine was added to adjust the pH as needed.

[0051] 2. Component B: 100 parts of zinc powder and aluminum powder are mixed according to the ratio of 6:1. After conventional degreasing, wash with absolute ethanol, add 1:1 ethylene glycol, 2.5 parts of ceric sulfate, stir at room temperature at 350r / min 4h for chemical passivation, add 10 parts of phosphorus iron powder, 0.5 parts of white carbon black, add 15 parts of wate...

Embodiment 3

[0054] 1. Component A: add 100 parts of epoxy resin and 200 parts of absolute ethanol into the three-necked flask reactor respectively, control 300r / min, heat at 40°C to mix and dissolve, add 1.2 parts of phosphotungstic acid, and then add 1.2 parts dropwise For the mixture of phosphoric acid and 100 parts of absolute ethanol, heat up to 50°C, reflux for 3 hours, cool to room temperature, add 150 parts of water, stir at 1500r / min for 30 minutes, add 0.5 parts of manganese carbonate and 1.5 parts of nickel carbonate, and further chemical bond under stirring Combine, and adjust the pH by adding diethanolamine as needed.

[0055] 2. Component B: 100 parts of zinc powder and aluminum powder are mixed according to the ratio of 5:1. After conventional degreasing, wash with absolute ethanol, add 1:1 ethylene glycol, 3.5 parts of ceric sulfate, stir at room temperature at 300r / min 4h for chemical passivation, add 7 parts of phosphorus iron powder, 1 part of white carbon black, add 10 ...

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Abstract

The invention discloses a chemically bonded metal anti-corrosion water-based paint and a preparation method thereof. The preparation method is different from conventional physical blending. Firstly, a pentavalent phosphorus compound and an epoxy resin are used to catalyze the bonding reaction to obtain a water-soluble paint that does not require a separation catalyst. Chemically bonded with manganese and nickel salts to obtain component A, component B is chemically bonded and passivated by cerium sulfate to zinc powder and aluminum powder, and then blended with phosphorus iron powder, white carbon black, etc. , then component A and component B are further blended and bonded, and finally component C thickener is added to obtain a water-based environment-friendly metal anti-corrosion coating. During the use of the coating, since the phosphorus-containing groups of the coating can further chemically bond with the metal substrate, it has high anti-corrosion performance, good resistance to organic solvents, and good corrosion resistance, and the coating uses water as a solvent, reducing VOC emission, excellent environmental performance.

Description

technical field [0001] The invention relates to the technical field of water-based paint synthesis and is mainly suitable for metal anticorrosion, in particular to a chemically bonded metal anti-corrosion water-based paint and a preparation method thereof. Background technique [0002] So far, coating is still one of the effective means of metal corrosion protection. The early dacromet coatings used chromic anhydride, zinc powder, aluminum powder, wetting agent, dispersant, deionized water and other raw materials. After mixing and stirring, the coating was obtained, and it was coated on the metal surface and baked at about 300°C. After baking, a layer of corrosion-resistant coating is formed on the surface of the metal substrate, which has been widely used in the industries of automobiles, bridges, electric power, railways, ships and home appliances. Although the Dacromet coating has excellent performance, it needs to passivate the zinc powder and aluminum powder with chrom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/61C08G59/14
CPCC09D163/00C09D5/106C09D5/103C09D7/61C09D7/70C08G59/1422C08K2003/0893C08K2003/0812C08K13/04C08K3/08C08K3/32C08K7/26
Inventor 袁爱群付聪黄增尉
Owner BEIJING ODYSSEY CHEM