A kind of conductive polymer solvent-free low-viscosity anti-corrosion coating and preparation method thereof

A conductive polymer and anti-corrosion coating technology, which is applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of construction workers' health threats, high viscosity, difficult construction, and volatilization into the atmosphere, and achieve excellent anti-corrosion performance. Good leveling, good corrosion resistance

Inactive Publication Date: 2011-12-07
日照君青能源科技材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many formulations containing polypyrrole or polyaniline anti-corrosion coatings in the prior art, the solvent-based ones have serious environmental pollution and pose a threat to the health of construction workers, while general solvent-free coatings containing polypyrrole or polyaniline are There is a defect that the viscosity is high and it is difficult to construct. At the same time, the other diluents added cannot participate in the final curing film formation, and volatilize into the atmosphere or cause certain pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: prepare anticorrosion coating:

[0028] (1) Take 1g of polypyrrole nano-powder, add it into 40g of DDDM under mechanical stirring, then heat it to 50°C and stir it mechanically for 2 hours, then cool it down to room temperature to obtain a well-mixed mixed curing agent.

[0029] (2) Weigh 10.0 g of epoxy resin (E44), add 4 g of reactive diluent propylene carbonate, 0.1 g of methyl silicone oil, and 2.0 g of dibutyl phthalate, stir mechanically rapidly for 2 hours, and mix well. Then add 4g of mixed curing agent and 0.4g of m-cresol, and stir rapidly for 1.5 hours until uniform. The coating was obtained by standing still for 0.5 hour.

[0030] Wherein, polypyrrole is obtained like this:

[0031] (1) At room temperature, weigh 3.4 g of cationic surfactant CTAB and 1.6 g of n-amyl alcohol and add it to 100 mL of distilled water, and stir rapidly to form a micellar solution of surfactant;

[0032] (2) Weighing 2.0g of pyrrole was added dropwise to the above...

Embodiment 2

[0037] Embodiment 2: prepare anticorrosion coating:

[0038] (1) Take 4g of polyaniline nano-powder, add it into 40g of DDDM under mechanical stirring, then heat it to 60°C and stir it mechanically for 3 hours, cool down to obtain a well-mixed mixed curing agent.

[0039] (2) Weigh 12.0 g of epoxy resin (E51), add 4 g of reactive diluent propylene carbonate, 0.1 g of methyl silicone oil, and 2.0 g of dioctyl phthalate, stir mechanically for 3 hours quickly, and mix well. Then add 4.5g of mixed curing agent and 0.5g of phenol, and stir rapidly for 2 hours until uniform. The paint was obtained by standing still for 1.0 hour.

[0040] Polyaniline is commercially available.

[0041] Application: Apply the above coatings with a brush to the 45# steel plate that has been polished, derusted and degreased, and the dry film thickness is controlled at about 150μm. Cured at 130°C for 6 hours.

Embodiment 3

[0042] Embodiment 3: prepare anticorrosion coating:

[0043] (1) Take 5g of polyaniline nano-powder, add it into 30g of DDDM under mechanical stirring, then heat to 70°C and stir mechanically for 5 hours, cool down to obtain a well-mixed mixed curing agent.

[0044] (2) Weigh 15.0 g of epoxy resin (E56), add 3.0 g of reactive diluent propylene carbonate, 0.1 g of simethicone, and 2.5 g of tricresyl phosphate, stir mechanically rapidly for 2 hours, and mix well. Then add 5.0g of mixed curing agent and 0.25g of phenol, and stir rapidly for 1 hour until uniform. Leave to stand for 1 hour to obtain a coating.

[0045]Application: Apply the above coatings with a brush to the 45# steel plate that has been polished, derusted and degreased, and the dry film thickness is controlled at about 50 μm. Cured at 150°C for 3 hours.

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PUM

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Abstract

The invention discloses a conductive polymer solvent-free low-viscosity anticorrosion coating, which comprises the following components: 0.4% to 5% of conductive polymer nano powder, 35% to 65% of epoxy resin, 10% to 25% of active diluent, and 15% of curing agent. % to 30%, curing accelerator 0.8% to 4%, defoamer 0.1% to 1%, plasticizer 8% to 15%, each component by mass percentage. The preparation method is: first mix the conductive polymer nano powder and the curing agent to obtain a mixed curing agent; then add a reactive diluent, defoamer, and plasticizer to the epoxy resin, mix well, then add a curing accelerator, mix and cure agent, mix well, and let stand for 0.5 to 1 hour. The coating of the invention can be applied to the anticorrosion coating of steel, magnesium and other metals, and has the advantages of no pollution, good performance, simple preparation, easy use and the like.

Description

technical field [0001] The invention relates to a conductive polymer solvent-free low-viscosity anticorrosion coating and a preparation method thereof. Background technique [0002] The loss caused by metal corrosion to human beings is staggering. According to statistics, the annual metal loss caused by corrosion in the world is as high as 20%-40% of the global metal production, and the economic loss is about 1 trillion US dollars. Practice has proved that the use of coatings for corrosion protection of metals is the most economical, practical and effective method. However, the current commonly used anti-corrosion coatings contain a large amount of organic solvents, which cause great pollution to the environment during the construction process and pose a huge threat to the health of workers; at the same time, commonly used anti-corrosion coatings are also rich in zinc, which not only consumes a lot of zinc resources, but also affects the health of workers. The environment i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D179/04C09D179/02C09D5/08
Inventor 张德田陈为军刘增温
Owner 日照君青能源科技材料有限公司
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