Preparation method of silicone modified acrylic hydrogel antifouling coating

Abstract

A preparation method of a silicone-modified acrylic hydrogel antifouling coating, the steps of: first synthesizing a silicone-modified acrylic resin, and then preparing a hydrogel antifouling coating: the antifouling coating is composed of A and B components For two-component coatings, the mass ratio of component A and component B is 8:1, and component A is the resin base material carrier, and the ingredients are: 55-65 parts of silicone modified acrylic resin, 4-4 parts of iron oxide red 6 parts, 0.5-1.5 parts of organic bentonite, 4-6 parts of zinc oxide, 7-9 parts of copper pyrithione, 8-10 parts of Sea‑Nine211 antifouling agent, 10-12 parts of organic solvent; component B is cross-linked agent carrier, the components are 25-35 parts of aziridine cross-linking agent, 60-70 parts of n-butanol, and 4-6 parts of water; the above-mentioned parts are parts by mass. The invention introduces silicone into the acrylic resin system by chemical method, and then cooperates with appropriate additives and antifouling agents to form a low-surface organic silicon antifouling barrier layer, so that the coating has the functions of self-layering and self-repairing, not only the process Simple, good anti-fouling effect, and the amount of anti-fouling agent is small, effectively prolonging the anti-fouling effect.

Description

technical field [0001] The invention belongs to the technical field of antifouling coatings, in particular to a preparation method of a silicone-modified acrylic hydrogel antifouling coating. Background technique [0002] Hydrogel is a polymeric elastomer with a three-dimensional cross-network structure, which has common entropic elasticity and is able to absorb large amounts of water and maintain it in the polymer network. Hydrogels are distinguished from general solid materials (such as metals, plastics, etc.) mainly due to their huge water absorption (60-99wt%) and their low elastic modulus, which is generally one percent to one percent of ordinary solid materials. One in ten thousand. Due to its uniqueness similar to natural tissue, and its properties such as structural strength, water absorption effect, elasticity, viscoelasticity, surface and other properties that can be adjusted by controlling the chemical composition and cross-linking degree of the hydrogel make it ...

AI Technical Summary

Problems solved by technology

In the current laboratory research, various types of hydrogel materials have shown good antifouling performance, but the antifouling test results in the actual ocean are unsatisfactory, and the antifouling performance is not ideal, or even lost 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 susceptible 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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