Antibacterial anti-mildew agent SP has good compatibility with all kinds of paints, emulsions, adhesives, rubber, plastics, can be added in any process, in the early stages of the production process with the raw material components added together and mixed, can also be added to the finished product after full mixing.
The general recommended addition amount is 0.5~1.0%, which should be adjusted according to the actual demand.
The fourth stage is the attachment and growth of larger marine invertebrates and algae. These large fouling organisms will quickly deform and grow, and have strong environmental adaptability with molecular river damage.
The antifouling mechanism of marine antifouling coatings is that the antifouling agent seeps out from the coating or forms a special surface.
The large fouling surface prevents fouling organisms from growing, so as to achieve the purpose top carnauba wax of anti-fouling. At present, the most commonly used antifouling paint is the principle of using antifouling agents to ooze out to kill or repel fouling organisms. Antifouling agents inhibit bacteria or cut off fouling organisms from larvae to adults. Figure 9-1 Marine fouling process A series of continuous growth processes.
Biological activity of marine antifouling agents
The sensitivity of various marine fouling organisms to antifouling agents is different, which has important guiding significance for the design of antifouling coating formulations, and the ability of common fouling organisms to resist antifouling agents.
It is generally believed in the industry that the critical exudation rate of copper (the lowest exudation rate to prevent marine organisms from attaching, the test method for exudation rate will be described later) is more than 10pg/(cm”·d) effective for barnacles: 10~20pg/( cm²·d) is effective for water daughters and jellyfish, 20~50pg/(cm²·d) is effective for algae, and 40pg/(cm·d) is effective for bacterial mucosa.
The critical exudation rate of organotin greater than 1pg/(cm²·d) is effective for rattan, and 5ug! (cm²·d) is effective for algae.
The toxicology of antifouling agents containing copper and other heavy metals on fouling organisms is that heavy metal ions reduce the activation of the main enzyme in the organism or directly turn the biological cell protein into metal protein deposits. There are also theories that copper and other heavy metals The antifouling agent has a high affinity with the main active ingredient sulfur in the main enzyme, thereby inhibiting the growth of marine organisms. Organotin can prevent the linear body from oxidizing phosphoric acid in the organism, destroying the basis of the growth of life cells, and reducing the growth of plants. And animal’s basal metabolism, thereby inhibiting the growth of fouling organisms.
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