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Organic silicon polyurethane/urea anti-fouling material bonded with anti-fouling factor and preparation and application thereof

An antifouling factor, silicone technology, applied in antifouling/underwater coatings, polyurea/polyurethane coatings, biocide-containing paints, etc., can solve the problem of low surface energy, low elastic modulus of silicone coatings, impact on Marine ecological environment and other issues, to achieve the effect of good anti-fouling performance

Active Publication Date: 2016-01-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of self-polishing antifouling coatings can effectively prevent the adhesion of marine organisms, but generally contain cuprous oxide, organic biocides, etc., while killing marine fouling organisms, they will also directly or indirectly damage other non-target organisms. Cause serious impact, affect the marine ecological environment, pollute the marine water environment
Therefore, the use of this antifouling coating will be gradually restricted or even banned
[0004] In recent years, the development of low-toxic and non-toxic organic silicon fouling and desorption antifouling coatings allows fouling organisms to grow on their surfaces, but the low surface energy and low elastic modulus of this type of antifouling coatings make the fouling The fouling organisms are not firmly attached, and under the washing of sea water, the fouling organisms will be washed away by the water flow
However, in practical applications, silicone fouling and desorption antifouling coatings also show many shortcomings: 1) Insufficient bonding strength: silicone-based materials have poor adhesion on the surface of other materials, and silicone-based antifouling coatings are required An intermediate connection paint is applied between the material and the anti-corrosion coating material, which will increase the construction cost and coating time, and increase the cost of the shipowner; 2) The durability is not good: the low elastic modulus of the silicone coating, the ship's side 3) The ability of the anti-slime layer is limited: the slime layer composed of diatoms and other microorganisms is difficult to completely clean up only by seawater washing, and the ship must be cleaned regularly. 4) Fouling will increase during the suspension period: during the suspension period, especially in tropical seas, even in just a few days, fouling organisms will "occupy" the ship's waterline The following parts will significantly increase the ship's own weight and surface roughness, increase navigation resistance and fuel consumption

Method used

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  • Organic silicon polyurethane/urea anti-fouling material bonded with anti-fouling factor and preparation and application thereof
  • Organic silicon polyurethane/urea anti-fouling material bonded with anti-fouling factor and preparation and application thereof
  • Organic silicon polyurethane/urea anti-fouling material bonded with anti-fouling factor and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In a three-neck flask equipped with a mechanical stirrer, a reflux condenser and a temperature detector, add 30.50 g of α, ω-hydroxy polydimethylsiloxane (molecular weight 5000), and vacuumize at 120°C for 2 hours to remove water and low-boiling small molecules Then close the vacuum and feed argon, cool to 60°C, add 65mL tetrahydrofuran, stir (speed 500rpm) to dissolve; then add 23.95g diphenylmethane diisocyanate (MDI), 0.80g dibutyltin dilaurate, argon Under protection, stir and react at 300rpm for 30 minutes; add 3.30g of dihydroxycarantine, 6.80g of 1,4-butanediol, continue to stir and react for 4h to obtain a silicone polyurethane / urea bonded with an antifouling active factor antifouling material. The obtained antifouling material of organic silicon polyurethane / urea bonded with antifouling active factors was coated on an epoxy glass fiber board, and no marine organisms grew on the shallow sea hanging board for 8 months.

Embodiment 2

[0047] Add 61.35 g of α, ω-hydroxypropyl polydimethylsiloxane (molecular weight 3000) to a three-necked flask equipped with a mechanical stirrer, reflux condenser, and temperature probe, and vacuumize at 120°C for 2 hours to remove water and small molecules Low boilers, then close the vacuum and feed argon, cool down to 80°C, add 150mL xylene, stir (speed 400rpm) to dissolve; then add 30.25g toluene diisocyanate (TDI), 5.12g stannous octoate, under argon protection , stirring and reacting at 300rpm for 10 minutes; adding 5.15g of paeonol and 5.65g of ethylene glycol, and continuing to stir and react for 6h to discharge, to obtain an antifouling material of silicone polyurethane / urea bonded with antifouling active factors. The obtained antifouling material of silicone polyurethane / urea bonded with antifouling active factors was coated on an epoxy glass fiber board, and no marine organisms grew on the shallow sea hanging board for 6 months.

Embodiment 3

[0049] Add 92.00 g of α, ω-hydroxybutyl polydimethylsiloxane (molecular weight: 2000) to a three-neck flask equipped with a mechanical stirrer, reflux condenser, and temperature detector, and vacuumize at 120°C for 2 hours to remove water and small molecules Low boilers, then turn off the vacuum and feed argon, cool down to 100°C, add 420mL N,N-dimethylacetamide, stir at a speed of 100rpm, dissolve; then add 32.35g of lysine diisocyanate (LDI), 3.5g Dibutyltin dilaurate, under the protection of argon, stirred and reacted at 100rpm for 40 minutes; added 13.42g of N-(2,4,6-trichlorophenyl) maleimide, 1.75g ​​of dihydroxy The amine was stirred and reacted for 3 hours to discharge the material, and an antifouling material of organic silicon polyurethane / urea bonded with an antifouling active factor was obtained. The obtained antifouling material of organic silicon polyurethane / urea bonded with antifouling active factors is coated on an epoxy glass fiber board, and no marine organi...

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Abstract

The invention belongs to the technical field of a marine anti-fouling material and discloses an organic silicon polyurethane / urea anti-fouling material bonded with an anti-fouling factor and preparation and application thereof. The anti-fouling material is prepared from the following raw materials in percentage by weight: 15 percent to 95 percent of hydroxy or amino terminated polysiloxane, 4 percent to 60 percent of diisocyanate and chain extender and 1 percent to 25 percent of anti-fouling functional factor, wherein the molar ratio of the diisocyanate to the sum of the hydroxy or amino terminated polysiloxane, the chain extender and the anti-fouling functional factor is (1.0 to 1.3):1. The anti-fouling material disclosed by the invention has excellent anti-fouling performance and is an environmental-friendly material.

Description

technical field [0001] The invention belongs to the technical field of marine antifouling materials, in particular to a silicone polyurethane / urea antifouling material bonded with antifouling functional factors, a preparation method and application thereof. Background technique [0002] Any surface immersed in seawater, such as marine equipment such as ships, marine instruments and meters, and oil production platforms, will fix marine organisms and form marine biofouling. It can increase the resistance of the ship, reduce the speed of the ship, increase fuel consumption, reduce the maneuverability of the ship, and cause huge economic losses. In addition, marine organisms and their metabolites will continuously erode the anti-corrosion coatings of ships and marine structures, shortening the service life of marine anti-corrosion coatings or even invalidating them, resulting in corrosion and damage of ships and marine structures, reducing service life, increasing maintenance co...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D175/02C09D5/16C08G18/66C08G18/61C08G18/32
Inventor 张广照马春风刘超
Owner SOUTH CHINA UNIV OF TECH
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