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A kind of antifouling organic-inorganic silicon hybrid coating and its preparation method and application

An inorganic silicon and organic technology, applied in the direction of antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problem of low adhesion and mechanical strength of organic silicon coating paint film, affecting antifouling effect, easy Scratch and other problems, to achieve excellent anti-fouling ability, simple and feasible preparation method, low cost effect

Active Publication Date: 2020-05-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to its highly flexible and non-polar polysiloxane structure, the paint film adhesion and mechanical strength of the silicone coating are low, and it is easy to be scratched or peeled off from the substrate during service, which affects the antifouling effect

Method used

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  • A kind of antifouling organic-inorganic silicon hybrid coating and its preparation method and application
  • A kind of antifouling organic-inorganic silicon hybrid coating and its preparation method and application
  • A kind of antifouling organic-inorganic silicon hybrid coating and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0050] 1. In a 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, 4 parts by weight of mercaptomethyltrimethoxysilane, 1 part by weight of peroxide Benzoyl was reacted at 120°C for 12 hours to obtain a fluorocarbon ester-antifouling monomer telomer with a molecular weight of 2500 g / mol.

[0051] 2. In the reaction vessel, add 30 parts by weight of methyltriethoxysilane, 10 parts by weight of the fluorocarbon ester-anti-fouling monomer telomer prepared in step 1, 50 parts by weight of methyl orthosilicate, 2 parts by weight Hydrochloric acid solution (aqueous solution with a concentration of 0.1 mol / L), 8 parts by weight of deionized water, stirred at room temperature for 4 hours, coated on an epoxy board, and cured at room temperature for 2 days to obtain a coating. The paint film adhesion of the obtained coating is 2.4MPa, the pencil hardness is H, and the coating h...

Embodiment 2

[0053] 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;

[0054]

[0055] 2. In the reaction vessel, add 30 parts by weight of octyltriethoxysilane, 10 parts by weight of the fluorocarbon ester-anti-fouling monomer telomer prepared in step 1, 50 parts by weight of tetraethyl orthosilicate, 0.1 parts by weight Nitric acid solution (aqueous solution with a concentration of 0.1 mol / L), 9.9 parts by weight of deionized water, stirred at room temperature for 48 hours, coated on an epoxy board, and cured at room temperature for 3 days to obtain a coating. The paint f...

Embodiment 3

[0057] 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, 40 parts by weight of mercaptomethyltriethyl Oxysilane, 2 parts by weight of phosphazene salt, and 30 parts by weight of isopropanol were reacted at 50° C. for 24 hours to obtain a fluorocarbon ester-antifouling monomer telomer with a molecular weight of 1000 g / mol.

[0058] 2. In the reaction vessel, add 35 parts by weight of octyltriethoxysilane, 20 parts by weight of phenyltriethoxysilane, 10 parts by weight of the fluorocarbon ester-antifouling monomer telomer prepared in step 1, 15 parts by weight Parts by weight of tetraethyl orthosilicate, 10 parts by weight of acetic acid solution (aqueous solution with a concentration of 0.05mol / L), 10 parts by weight of deionized water, stirred at room temperature for 24 hours, coated on an epoxy board, cured at room temperature for 1 day to ob...

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Abstract

The invention discloses an antifouling organic-inorganic silicon hybrid coating and its preparation method and application. The antifouling organic-inorganic silicon hybrid coating includes: 30 to 60 parts of hydrocarbyl trialkoxysilane, 1 to 40 parts of fluorocarbon ester-antifouling monomer telomer, 15 to 50 parts of silicate ester, and organic solvent 0 to 10 parts, 0.1 to 10 parts of acid catalyst and 1 to 10 parts of deionized water; the fluorocarbon ester-antifouling monomer telomer is prepared from the following components: (meth)acrylic fluorocarbon ester part, (Meth)acrylate antifouling monomers, mercaptosilane coupling agents, solvents and initiators. The antifouling agent of the present invention is concentrated on the surface of the coating, giving the material excellent fouling resistance and is eco-friendly. The coating surface roughness and surface energy are low, and it has good fouling desorption ability; the paint film has high adhesion and excellent mechanical properties, which can meet the antifouling requirements of low-speed ships and offshore oil production platforms and other equipment, 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 an antifouling organic-inorganic silicon hybrid paint and its preparation method and application. Background technique [0002] Silicone coating is a kind of environment-friendly coating with excellent fouling and desorption ability, but its antifouling function depends on the erosion of strong water flow. In terms of anti-fouling ability is weak, marine organisms can attach in a short time and it is difficult to remove. Especially with the slime layer consisting of bacteria and diatoms, once attached it is very difficult to clean from the silicone surface. In addition, due to its highly flexible and non-polar polysiloxane structure, the paint film adhesion and mechanical strength of the silicone coating are low, and it is easy to be scratched or peeled off from the substrate during service, affecting the antifouling effect. [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/14C09D133/24C09D5/16C08F220/24C08F220/28C08F220/36C08F220/34C08F220/58C08F220/60C08F220/30C08J7/04C08L63/00
CPCC09D133/14C09D5/1668C09D133/24C08F220/24C08F220/36C08F220/60C08J2363/00C08J2433/14C08J2433/24C08F220/606C08F220/301C08J7/0427C08K3/36C08F220/286C08F220/585
Inventor 张广照马春风谢庆宜陈润泽
Owner SOUTH CHINA UNIV OF TECH
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