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Static anti-fouling self-layering organosilicon coating and preparation method and application thereof

A silicone coating and self-layering technology, applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problems of inability to play antifouling effect, achieve excellent antifouling ability and reduce surface energy , Excellent fouling and desorption ability

Active Publication Date: 2019-09-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Grafting antifouling functional groups can improve the static antifouling ability of silicone without causing environmental problems, but due to the surface enrichment ability of silicone, antifouling functional groups will be embedded in the coating and cannot play an antifouling role

Method used

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  • Static anti-fouling self-layering organosilicon coating and preparation method and application thereof
  • Static anti-fouling self-layering organosilicon coating and preparation method and application thereof
  • Static anti-fouling self-layering organosilicon coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1. In the reaction vessel, add 70 parts by weight of hexafluorobutyl acrylate, 25 parts by weight of polyethylene glycol methacrylate with a degree of polymerization of 10, and 4 parts by weight of mercaptomethyltrimethoxysilane (purchased from Gelest Company) 1. 1 part by weight of benzoyl peroxide was reacted at 120° C. for 12 hours to obtain a fluorocarbon ester-antifouling monomer telomer with a molecular weight of 2500 g / mol.

[0057] 2. In the reaction vessel, add 50 parts by weight of silanol-terminated polydimethylsiloxane (viscosity is 5000mPa·s), 40 parts by weight of the fluorocarbon ester-antifouling monomer telomer prepared in step 1, 9 Parts by weight of xylene and 1 part by weight of dibutyltin dilaurate were stirred at room temperature for 10 minutes, sprayed on the steel plate, and cured at room temperature for 1 day to obtain a coating. The elastic modulus of the coating is 2.3MPa. The shallow sea hanging board test was carried out on the coating, and...

Embodiment 2

[0059] 1. In a reaction vessel, add 10 parts by weight of trifluoroethyl acrylate and 70 parts by weight of ethyl carboxybetaine acrylate (the structural formula is as described in formula 1, wherein R is C 2 h 4 ), 1 part by weight of mercaptopropyltrimethoxysilane, 0.05 parts by weight of azobisisobutyronitrile, and 18.95 parts by weight of acetone, reacted for 48 hours at 60 ° C to obtain fluorocarbon ester-antifouling monomer telomer, molecular weight is 10000g / mol;

[0060]

[0061] 2. In the reaction vessel, add 90 parts by weight of silanol-terminated polydimethylsiloxane (viscosity is 500mPa·s), 1 part by weight of fluorocarbon ester-antifouling monomer telomer prepared in step 1, 9 parts by weight Parts by weight of tetraethyl orthosilicate and 0.1 part by weight of di-n-octyltin dilaurate were stirred at room temperature for 30 minutes, sprayed on the steel plate, and cured at room temperature for 1 day to obtain a coating. The elastic modulus of the coating is ...

Embodiment 3

[0063] 1. In a reaction vessel, add 10 parts by weight of octafluoropentyl methacrylate, 8 parts by weight of dodecafluoroheptyl acrylate, 10 parts by weight of dimethylaminoethyl methacrylate (purchased from Sigma Aldrich), 40 parts by weight Mercaptomethyltriethoxysilane (purchased from Sigma Aldrich), 2 parts by weight of phosphazene salt (purchased from Sigma Aldrich) and 30 parts by weight of isopropanol were reacted at 50°C for 24 hours to obtain fluorocarbon ester-antifouling Monomer telomer with a molecular weight of 1000 g / mol.

[0064] 2. In the reaction vessel, add 65 parts by weight of silanol-terminated polydimethylsiloxane (viscosity is 3000mPa·s), 5 parts by weight of fluorocarbon ester-antifouling monomer telomer prepared in step 1, 20 parts by weight Parts by weight of tetrapropyl orthosilicate and 10 parts by weight of acetic acid were sprayed on the steel plate after being stirred at room temperature for 10 minutes, and cured at room temperature for 3 days t...

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Abstract

The invention discloses static anti-fouling self-layering organosilicon coating and a preparation method and application thereof. The coating includes an A component and a B component, wherein the A component includes 50-90 parts of silanol-terminated polydimethylsiloxane, 1-40 parts of a fluorocarbon ester-anti-fouling monomer telomer, 0.1-10 parts of a catalyst, and 0-30 parts of a solvent; theB component is 5-20 parts of silicate ester; the fluorocarbon ester-anti-fouling monomer telomer is prepared from (meth)acrylate fluorocarbon ester, a (meth)acrylate anti-fouling monomer, a mercapto silane coupling agent, an initiator and a solvent. The coating can form self-layering coatings with anti-fouling functional groups being enriched on surfaces of the coatings, thus endowing a material with excellent fouling resistance. Through the organosilicon, the coating has good decontamination ability. The self-layering material can meet anti-fouling requirements of ships with low speeds, offshore oil platforms and other facilities, and has excellent drag reduction performance.

Description

technical field [0001] The invention belongs to the technical field of marine antifouling materials, and in particular relates to a static antifouling self-layering organic silicon coating and a preparation method and application thereof. Background technique [0002] In recent years, developing marine resources and developing marine economy has become an important strategy of many countries. However, the problem of marine biofouling has brought serious problems to the marine industry and maritime activities. It refers to the biofouling formed by marine animals, plants and microorganisms attached to the surface submerged in seawater, which will increase the resistance of ships and increase fuel consumption. , accelerated metal corrosion and other consequences. At present, the application of self-polishing marine antifouling coatings is the most commercial antifouling method, but such coatings release a large amount of metal antifouling agents, which have an impact on marine...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D151/08C09D133/16C09D5/16C09D7/63
CPCC09D5/1637C09D5/1675C09D5/1687C09D183/04C08L51/08C08L33/16C08K5/5415
Inventor 张广照马春风谢庆宜潘健森
Owner SOUTH CHINA UNIV OF TECH
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