Research Progress of Organic Silicone Low Surface Energy Marine Antifouling Coatings

Y.
Yonehara et al.
used a series of self-made vinyl-containing or/and hydroxyl-terminated silicone polymers with different structures as base materials, with different proportions of silicone oil as additives, and added solvents, fillers, etc.
Marine antifouling paint for insect agents.
Combine it with traditional vinyl chloride resin antifouling paint (the insecticides used are: triphenyltin fluoride and red Fe2O3; Cu2O, red Fe2O3 and BaO; triphenyltin fluoride, Cu2O and red Fe2O3) for 12 Months of real sea hanging board comparison experiment.
The results show that the surface tension of silicone marine antifouling coatings is significantly lower than that of traditional marine antifouling coatings, and the antifouling effect is better than traditional antifouling coatings [13].
K.
Masato et al.
synthesized hydroxyl-terminated polyorganosiloxanes with different viscosities, adding vinyl or keto silane coupling agents, boric acid organic catalysts, and silicone oils containing different groups (methyl, phenyl, etc.
) to prepare Get silicone marine antifouling paint.
Four months after the coating was applied to the seaboard, there was basically no marine organisms attached to the surface; however, a lot of sludge, shellfish and vegetation appeared on the surface of the coating without silicone oil [14].
S.
Takafumi synthesized silicone oils with different molar masses (250～100000g/mol) with polyether chains, long-chain alkyl groups and/or aryl groups, and added them to condensation-type room temperature vulcanization (RTV) silicone resins in different proportions.
It is necessary to use antifouling paint underwater.
When in use, the silicone oil slowly oozes out to the surface to reduce the surface tension of the coating, thereby achieving an anti-fouling effect.
Compared with the traditional vinyl chloride isobutyl ether copolymer antifouling coating, the antifouling effect of this coating can reach more than 2 years, while the traditional antifouling coating has different degrees of pollution after using it for up to 1 year[15] .
J.
Stein of General Electric in the United States synthesized silanol, carbonyl, dialkoxy and trialkoxy terminated polyorganosiloxanes, added filler silica (SiO2) or calcium carbonate, and matched with catalysts and couplings.
Condensed RTV marine antifouling coatings are prepared by using auxiliary agents such as linking agents.
The real sea hanging board experiment confirmed that 91%～99% of the surface of the coating has not been polluted by marine organisms after 12 months under water [16-18].
Shin-Etsu Corporation's T.
Sakamoto uses a condensation type RTV silicone resin with at least two silanol groups or other hydrolyzable groups as the base material, ionic liquid as an auxiliary, and a silane with silanol groups or other hydrolyzable groups to prepare underwater anti-corrosion.
Dirt paint.
The experiment of real sea hanging board confirmed that this kind of coating still has good antifouling performance under water for more than 12 months [19-20].
Wang Ke and others synthesized dimethyl silicone oil and dimethyl diphenyl silicone oil, and added them to the silicone marine antifouling coating.
The morphology of the silicone oil on the coating surface and the SEM photo explained the antifouling effect of the silicone oil on the coating.
Performance impact.
The real sea board confirmed that the antifouling performance of antifouling coatings added with silicone oil, especially phenyl silicone oil, has been greatly improved.
Even if fouled marine organisms are attached, they can easily fall off without affecting the stability of the coating in seawater [ twenty one].

Since the silicone marine antifouling paint based on pure silicone polymer is easy to prepare, commercial products have been formed, such as Hempasil 77500 series from Hempel Company in Denmark, International Intersleek from Akzonobe Company in the Netherlands, CaptainBiox from Kansai Company in Japan, and Jotun Company in Norway.
Sealion etc.
Although these products have excellent performance, they have a slightly lower antifouling effect than traditional antifouling paints and are more expensive.

The antifouling effect of pure organic silicon marine antifouling paint is partly through the silicone oil or other additives from the coating body to the surface, so that the fouling attached to the oil surface can easily fall off, thereby playing an antifouling effect.
(Source: Global Coatings Network) (For more information, please log in: Global Coatings Network http:// )