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Rust layer direct coating paint composition containing dopamine or its derivatives and preparation method thereof

A technology of dopamine and derivatives, applied in the field of anti-corrosion coatings, can solve the problems of coating performance degradation, etc., and achieve the effect of improving adhesion and corrosion resistance, high adhesion, and high corrosion resistance

Active Publication Date: 2017-06-16
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The adhesion of the coating has an important influence on the performance of the coating. Due to the looseness of the rust layer, the performance of various coatings coated on the rust layer will deteriorate.

Method used

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  • Rust layer direct coating paint composition containing dopamine or its derivatives and preparation method thereof
  • Rust layer direct coating paint composition containing dopamine or its derivatives and preparation method thereof
  • Rust layer direct coating paint composition containing dopamine or its derivatives and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The composition of this coating is prepared according to the following component ratio (mass percentage):

[0025]

[0026] Described dopamine refers to the substance that is following structure in molecular structure:

[0027]

[0028] The antirust pigment is a mixture of zinc phosphate and calcium carbonate treated with an amino coupling agent, the particle size of the calcium carbonate is 10 μm, and its mass ratio is zinc phosphate: calcium carbonate = 3:1.

[0029] The filler includes a mixture of talc powder and wollastonite, and the mixing mass ratio is talc powder: wollastonite=10:3.

[0030] The structural formula of the compound containing double bond is:

[0031] The composition of this coating is prepared as follows: mix and stir the above-mentioned components evenly, and then grind them on a grinder until the particle size reaches 0.5 μm, then fill it, and adjust it with an appropriate amount of water during construction. to the proper viscosity. ...

Embodiment 2

[0034] The composition of this coating is prepared according to the following component ratio (mass percentage):

[0035]

[0036] The dopamine derivative I refers to a substance having the following structure in the molecular structure:

[0037]

[0038] The antirust pigment is a mixture of zinc phosphate and calcium carbonate treated with an amino coupling agent, the particle size of the calcium carbonate is 30 μm, and its mixing mass ratio is zinc phosphate: calcium carbonate=3:1.

[0039] The filler is a mixture of talcum powder and wollastonite, and its mixing mass ratio is talcum powder: wollastonite=10:3.

[0040] The compound containing a double bond refers to a substance whose molecular structure is as follows:

[0041]

[0042] The composition of this coating is prepared as follows: mix and stir the above-mentioned components evenly, then grind them on a grinder until the particle size reaches 1 μm, and then fill it. During construction, you can use an appr...

Embodiment 3

[0045] The composition of this coating is prepared according to the following component ratio (mass percentage):

[0046]

[0047] Described dopamine refers to the material that is following structure in molecular structure:

[0048]

[0049] The antirust pigment is a mixture of zinc phosphate and calcium carbonate treated with an amino coupling agent, the particle size of the calcium carbonate is 50 μm, and the mixing mass ratio is zinc phosphate: calcium carbonate=3:1.

[0050] The filler is a mixture of talcum powder and wollastonite, and its mixing mass ratio is talcum powder: wollastonite=10:3.

[0051] The compound containing a double bond refers to a substance whose molecular structure is as follows:

[0052]

[0053] The composition of this coating is prepared as follows: mix and stir the above-mentioned components evenly, and then grind them on a grinder until the particle size reaches 0.5 μm, then fill it, and adjust it with an appropriate amount of water d...

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Abstract

The invention discloses a dopamine-containing styrene-acrylic emulsion coating composition capable of being directly applied on a rusty layer. The coating composition comprises the following substances in percentage by mass: 10-20% of dry oil alkyd resin, 20-30% of amino glycol, 8%-20% of pure acrylic emulsion, 1-5% of dopamine or derivatives thereof, 1-5% of a double-bond-containing compound, 10-25% of a rustproof pigment and 10-25% of filler. The coating composition is characterized in that by using natural products, super adhesion properties of barnacle secretions are simulated and the problems that the porous rusty layer is adhered and the harmful substances in iron rust are passivated are solved.

Description

technical field [0001] The invention belongs to the field of coatings, and relates to an anti-corrosion coating directly coated on a rust layer or an old paint, in particular to an anti-corrosion coating directly coated on a rusty base material. Background technique [0002] The adhesion of the coating has an important influence on the performance of the coating. Due to the looseness of the rust layer, the performance of various coatings coated on the rust layer will deteriorate. Recent studies have shown that marine organisms have super strong adhesion, and their molecular structure has a remarkable feature, that is, there are two adjacent hydroxyl groups on the benzene ring. This has attracted people's attention, and people have tried various methods. This material is simulated using a material of similar structure. [0003] Through the comparison of natural and synthetic molecular structures, it is found that dopamine or its derivatives contain catechol and amino groups,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/08C09D133/00C09D5/08C09D7/12
CPCC08K2201/014C09D5/084C09D5/086C09D7/61C09D7/63C09D7/65C09D7/69C09D167/08C08L33/04C08K13/06C08K9/04C08K2003/265C08K2003/328C08K3/34C08K5/17C08K5/18
Inventor 高延敏李丽英韩莲蒋诗旭王丹
Owner JIANGSU UNIV OF SCI & TECH
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