Preparation method of organosilicon-modified polyurethane hydrogel antifouling paint

Abstract

The invention relates to a preparation method of an organosilicon-modified polyurethane hydrogel antifouling paint. The method comprises the following steps: organosilicon-modified polyurethane resin is synthesized; and the hydrogel antifouling paint is prepared. The antifouling paint is a double-component paint composed of a component A and a component B with a mass ratio of (11-13):1. The component A is a resin binder carrier comprising the components of, by mass, 55-65 parts of organosilicon-modified polyurethane resin, 4-6 parts of red iron oxide, 0.5-1.5 parts of organic bentonite, 4-6 parts of zinc oxide, 7-9 parts of copper pyrithione, 6-8 parts of Sea-Nine 211, 2-3 parts of terminated dimethicone, and 10-11 parts of xylene. The component B is a crosslinking agent carrier. According to the invention, the organosilicon monomer is introduced into the polyurethane resin system with a chemical method; with appropriate auxiliary agents and antifouling agent, a low-surface organosilicon antifouling barrier layer is formed, and the paint is provided with self-layering and self-healing effects. The process is simple; the antifouling effect is good; anti-fouling agent dose is low; and production cost is greatly reduced.

Description

Technical field [0001] The invention belongs to the technical field of antifouling coatings, and in particular relates to a preparation method of an organosilicon modified polyurethane hydrogel antifouling coating. Background technique [0002] In recent years, due to the increasing attention to the marine environment, the design and research of environmentally friendly new antifouling coatings is a general trend. As a potential flexible marine antifouling material, hydrogel has attracted more and more attention. Hydrogel is a polymer elastomer with a three-dimensional cross-linked network structure. It has a certain deformation ability and can absorb a large amount of water and keep it in the polymer network. Hydrogels are mainly divided into two categories: (1) Stable chemical glues. The polymers in this hydrogel are generally cross-linked through strong and stable chemical bonds; (2) Reversible physical glues: The formation of the polymer network in this type of hydrogel mai...

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Problems solved by technology

[0003] At present, in laboratory research, various modified hydrogel materials have shown good antifouling performance, but the antifouling test results in the actual ocean are not satisfactory, and the antifouling performance is not ideal. Even lost the antifouling performance

The main reasons are: (1) Most of the hydrogel materials have poor mechanical properties, and the adhesion to the substrate becomes poor after absorbing water; (2) The hydrogel materials are easy to age in seawater, and the physical and chemical properties of the materials are difficult to obtain. Guarantee; (3) The actual marine environment is very complex, and the surface of the hydrogel is easily damaged by fine fouling biodeposits, thereby changing the original surface properties of the material; (4) In practical applications, due to the fact that the hull is sailing and docking During the process, the coating is generally vulnerable to relatively slight collisions and frictions. Hydrogels lacking self-renewal or self-repairing capabilities are easily damaged by external forces and lose antifouling properties.

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