Nano compound anticorrosive paint and preparation method thereof

An anti-corrosion coating and nano-composite technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as agglomeration, high surface free energy, and easy agglomeration of nanoparticles, achieving low cost and excellent coating performance , The effect of simple and convenient preparation process

Inactive Publication Date: 2012-11-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although nano anti-corrosion coatings have been widely developed at present, there are still some common problems: due to the large specific surface area and high surface free energy of nano fillers, the nanoparticles are easy to agglomerate, even if the nanoparticles are dispersed by ball milling, high-speed stirring, etc. In coatings, agglomeration will also occur, losing the proper effect of nano fillers
Although the addition of inorganic nano-fillers enhances the mechanical properties of the coating, the bonding between the inorganic nano-fillers and the organic matrix is ​​weak, resulting in weakened barrier effects of the coating on oxygen, water, etc., and poor corrosion stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: The preparation method of nanocomposite anticorrosion coating, concrete operation is as follows:

[0023] (1) Add polyether diol (molecular weight 1000), castor oil, and organoclay into the reaction kettle for mixing, and stir to raise the temperature. When the temperature rises to 40°C, add toluene diisocyanate dropwise for 50 minutes, and then Stir at 60°C for 0.5 h, heat up to 80°C and stir for 0.5 h, take a sample to measure the NCO value of the terminal group, when the NCO reaches 2.0%, cool down to 40°C, add styrene to the reaction system, stir for 0.5 h, and Vacuum degassing for 0.5 h to obtain component A---polyurethane prepolymer; wherein the mass ratio of polyether diol to castor oil is 8:1, and the amount of toluene diisocyanate added is based on the isocyanate index (NCO / OH)=1.0:1 calculation, the amount of organic clay added is 1% of the total mass of polyurethane and polystyrene, and the amount of styrene added is added according to the polyur...

Embodiment 2

[0027] Example 2: The preparation method of nanocomposite anticorrosion coating, concrete operation is as follows:

[0028] Add polyether diol (molecular weight 2000), castor oil, and organoclay into the reaction kettle for mixing, and stir to raise the temperature. When the temperature rises to 50°C, add toluene diisocyanate dropwise, finish adding in 55 minutes, and then keep warm at 60°C Stir for 0.5 h, heat up to 80 °C and keep stirring, take a sample to measure the NCO value of the end group, when the NCO reaches 2.5 %, cool down to 40 °C, add styrene to the reaction system, stir for 0.5 h, and degas at 40 °C for 0.5 h, that is, component A—polyurethane prepolymer; the mass ratio of polyether polyol to castor oil is 7:1, and the amount of toluene diisocyanate added is based on isocyanic acid index (NCO / OH)=1.5:1 Calculate, the addition of organic clay is 2% of polyurethane and polystyrene gross mass, and the addition of styrene is that 80 / 20 adds by polyurethane / polysty...

Embodiment 3

[0033] Example 3: The preparation method of nanocomposite anticorrosion coating, concrete operation is as follows:

[0034] Add polyether diol (molecular weight 3000), castor oil and organoclay into the reaction kettle for mixing, and stir to raise the temperature. When the temperature rises to 60 ℃, add toluene diisocyanate dropwise, finish adding for 45 minutes, and then keep warm at 60 ℃ Stir for 0.5 h, heat up to 80 °C and keep stirring, take a sample to measure the NCO value of the end group. When the NCO reaches 3.0 %, cool down to 40 °C, add styrene to the reaction system, stir for 0.5 h, and degas at 40 °C for 0.5 h , to obtain component A—polyurethane prepolymer; wherein the mass ratio of polyether diol to castor oil is 5:1, and the amount of toluene diisocyanate added is based on isocyanic acid index (NCO / OH)=1.8: 1 calculation, the addition of organic clay is 3% of polyurethane and polystyrene gross mass, and the addition of styrene is that 70 / 30 adds by polyureth...

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PUM

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Abstract

The invention discloses a preparation method of nano compound anticorrosive paint. The paint is characterized by comprising the following steps of: taking polyurethane, polystyrene and organic clay as structural units, adopting a method of combining an interpenetrating network technology and an in-situ intercalation polymerization, and obtaining organic clay-polyurethane and polystyrene ternary nano compound anticorrosive paint. The preparation method provided by the invention has the characteristics of simplicity and convenience in technology, environmental protection, excellent paint performance and low cost, so that a novel paint product with high performance is provided and can be extensively applied to anticorrosion in the fields of automobile painting, buried steel pipes, chemical and mechanical equipments and the like.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite anticorrosion paint, which belongs to the field of chemical materials. Background technique [0002] Metal corrosion has brought huge losses to the national economy. The metal equipment and materials scrapped due to corrosion every year is equivalent to 1 / 3 of the annual output of metal. The use of coatings for anti-corrosion is the most important and most effective means of anti-corrosion today. The coating has good stability and low permeability to corrosive media, and at the same time has excellent mechanical properties, so that it can truly play a role in anti-corrosion. Common anti-corrosion coatings include epoxy resin-based, polyethylene-based, polyurethane-based and other coatings, but the existing anti-corrosion coatings have problems such as poor corrosion resistance, short anti-corrosion time, poor adhesion or poor temperature resistance. For example, epoxy resin-based coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D175/08C09D125/06C09D5/08C08G18/67C08G18/48C08F112/08C08K3/34
Inventor 陕绍云贾庆明王亚明蒋丽红
Owner KUNMING UNIV OF SCI & TECH
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