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Anti-corrosion anti-dirt method or biological anti-dirt and conductive anti-dirt combination

A biological antifouling, combined technology, applied in conductive coatings, biocide-containing paints, antifouling/underwater coatings, etc., can solve the problem of reduced volume conductivity, short average service life, and conductive carbon black easily migrated to the surface. and other problems, to achieve the effect of high electrical conductivity and lasting and stable electrical conductivity

Inactive Publication Date: 2007-08-29
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most coatings have disadvantages such as damage to the marine ecological environment and a short average service life (about 1 to 2 years). Japanese Patent No. 58-11564 reports the use of conductive coatings mixed with metal powder or conductive carbon black in general It can be used as a conductive antifouling coating under weak current, but the metal powder has a high density and is not resistant to corrosion. Conductive carbon black is easy to migrate to the surface and escape into seawater to reduce the volume conductivity, thus affecting the long-term use effect
Chinese patent 97115977.7 discloses a preparation method of conductive polyaniline anti-fouling anti-corrosion coating. This method uses cuprous oxide as an anti-fouling additive instead of producing hypochlorous acid anti-fouling through electrolysis of seawater. Although it can prevent pollution, it will destroy the ocean. ecosystem
U.S.5397385 reported capsaicin antifouling paint, with 73% epoxy resin as the base material, the addition of capsaicin is as high as 5.5% to 16%. At present, the price of capsaicin in China is relatively high, which makes the cost of coating too high and is difficult for industrial production

Method used

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  • Anti-corrosion anti-dirt method or biological anti-dirt and conductive anti-dirt combination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Preparation of bio-antifouling coating: 15g of chlorinated rubber is stirred and mixed in 10g of xylene, after dissolving, add 4g of nano-titanium dioxide, 4g of calcium hydroxide, 1g of ethyl butyrate, 12.5g of chlorinated paraffin, and stir for 2 hours , add 3.5g tannin, process 6 hours with ball mill, after stirring again 2 hours, make biological antifouling coating;

[0025] 2) Preparation of conductive antifouling paint: 24g of chloroether resin and 30g of xylene were mixed, 1g of ethyl glycerate and 20g of chlorinated paraffin were added, mechanically stirred evenly, then 1g of polyaniline, 3g of dodecylbenzenesulfonic acid, 8g nano-titanium dioxide, 12g bentonite and 1g titanate coupling agent, stir vigorously for 1 hour; ultrasonically treat the mixture for 10 minutes, and then process it with a ball mill or colloid mill for 1 hour; under high-speed stirring, mix the mixture thoroughly for 1 hour , to obtain a conductive antifouling coating;

[0026] 3) the ...

Embodiment 2

[0028] 1) Preparation of bio-antifouling coating: Stir and mix 9g chloroether resin in 25g xylene, after dissolving, add 4g nanometer titanium dioxide, 6g bentonite, 0.5g ethyl butyrate, 3g chlorinated paraffin, after stirring for 2 hours, add 2.5g of tannin was processed with a ball mill for 1 hour, and after stirring for 2 hours, a biological antifouling coating was obtained;

[0029] 2) Preparation of conductive antifouling paint: Mix 20g of polyurethane and 60g of xylene, add 2g of ethyl glycerate and 2g of dioctyl phthalate, stir evenly, then add 5g of polyaniline, 1g of salicylic acid, 3g of nano Titanium dioxide, 5g calcium hydroxide and 2g titanate coupling agent, stirred vigorously for 3 hours; ultrasonically treated the mixture for 1 hour, and then added it with a ball mill or colloid mill for 2 hours; under high-speed stirring, the mixture was fully mixed for 4 hours , to obtain a conductive antifouling coating;

[0030] 3) Apply the biological antifouling coating ...

Embodiment 3

[0032]1) Preparation of bio-antifouling coating: 16g of chlorinated rubber was stirred and mixed in 18g of xylene. After dissolving, 1.5g of nano-titanium dioxide, 0.8g of methyl silicone oil, and 6.2g of chlorinated paraffin were added. After stirring for 2 hours, 7.5g of chlorinated rubber was added. Tannin was processed with a ball mill for 2 hours, and after stirring for 2 hours, a biological antifouling coating was obtained;

[0033] 2) Preparation of conductive antifouling coating: mix 28g of chloroether resin and 40g of xylene, add 0.8g of ethyl glyceride and 6g of chlorinated paraffin, stir evenly, then add 10g of polyaniline, 5g of methanesulfonic acid, 2g of nano Titanium dioxide, 3g bentonite and 5.2g titanate coupling agent were stirred vigorously for 6 hours; the mixture was ultrasonically treated for 3 hours, and then processed with a ball mill or colloid mill for 4 hours; under high-speed stirring, the mixture was fully mixed for 8 hours, Obtain conductive antif...

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Abstract

The invention relates to an antisepsis antifouling method that combines biology antifouling and conductive antifouling. The biology antifouling coating includes film forming resin, natural products, solvent, dye, defrother, and plasticizer. The conductive antifouling coating is coated on the steel board of bull contacting to sea water, coating conductive antifouling coating that is used as anode. While conducting small current, the sea water would be electrolyzed, and the surface would be covered by deutero chlorine ion to avoid the adhesion of sea biology. The invention has the advantages of high conductivity, stability, acid and alkali resistant, no pollution to sea water environment, etc.

Description

technical field [0001] The present invention relates to the preparation of biological anti-fouling coating and conductive anti-fouling coating and a new anti-corrosion and anti-fouling method combining biological anti-fouling coating and conductive anti-fouling coating, especially suitable for long-term effective prevention of hull submerged in seawater Corrosion and attachment of marine fouling organisms. Background technique [0002] A large number of ships sail in the harsh marine environment. The bottom part of the ship has been immersed in seawater for a long time, and has suffered serious damage from seawater corrosion and marine fouling organisms, which has brought many difficulties to the normal navigation of ships. Its main manifestation is that when marine organisms attach to the bottom of the ship, a series of complex physical and chemical changes will occur with the growth of these fouling organisms, which will greatly accelerate the corrosion of the bottom steel...

Claims

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Application Information

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IPC IPC(8): C09D5/16C09D5/24C09D133/00C09D115/02C09D175/04C09D179/02B63B59/04
Inventor 陈双扣王伯初周太刚冯莹柱梁华民
Owner CHONGQING UNIV
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