A kind of antifouling coating with high adhesion and low surface energy loaded with silver and preparation method thereof

Abstract

The invention discloses high-adhesion, low-surface-energy silver-loaded antifouling paint and a preparation method thereof. The preparation method comprises the following steps: 1, preparing organic fluorine modified acrylic resin; 2, mixing ethyl orthosilicate, absolute ethyl alcohol, hydrochloric acid and deionized water, and conducting hydrolytic polycondensation reaction to prepare organic silicone resin; 3, blending the organic fluorine modified acrylic resin and the organic silicone resin, and enabling dealcoholization reaction to synthesize organic fluorine-silicon modified acrylic resin; 4, enabling coordination reaction of nano silver particles, methanol, acetic acid and sulfydryl and hydroxyl containing organic ligand to prepare hydroxyl containing mercaptan nano-silver organic coordinated particles; 5, mixing the organic fluorine-silicon modified acrylic resin, the hydroxyl containing mercaptan nano-silver organic coordinated particles and a catalyst, dropwise adding isophorone diisocyanate, and enabling cross-linking reaction to prepare the high-adhesion, low-surface-energy silver-loaded antifouling paint. The high-adhesion, low-surface-energy silver-loaded antifouling paint has the high-adhesion property of acrylic acid and polyurethane, has the low-surface-energy property of organic fluorine and organic silicone, and has the significant antifouling effect.

Description

technical field [0001] The invention belongs to the field of marine engineering and ship antifouling, and relates to a green antifouling paint, in particular to a silver-loaded antifouling paint with high adhesion and low surface energy and a preparation method thereof. technical background [0002] Low surface energy coatings and green nano-antifouling agents are two environmentally friendly synergistic antifouling technologies developed in the field of marine engineering and ship antifouling in recent years. [0003] For low surface energy coatings, the antifouling principle lies in its unique surface properties, which makes the adhesion interface of fouling organisms on the coating very weak. In this case, the fouling can be easily removed by using the weight or the impact of water flow damaging organisms. At present, the common base resins for low surface energy antifouling coatings mainly include silicone-based and fluoride-based resins, each with its own advantages an...

AI Technical Summary

Problems solved by technology

Silicone-based low surface energy antifouling resins show good mechanical properties, but the coating film is soft, easy to deform, and has poor recoatability, and the effect is not ideal when used alone; The lowest performance antifouling material, but its curing temperature is high and the price is relatively expensive

And in actual application, these low surface energy coatings are subjected to very big limitation, and this is mainly because while realizing the low surface performance of coating, also inevitably reduces the adhesion between coating and primer, This greatly reduces the service life of this type of coating

[0004] For many nano antifouling agents, nano silver is a kind of green antifouling agent with broad-spectrum antibacterial effect recognized by the academic circle, and has been widely used in various fields such as medical health, food packaging and textile fibers. However, in the field of antifouling coatings, nano-silver is not widely used because it is easy to agglomerate, has poor miscibility with organic materials, and is not easy to disperse evenly in the coating.

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