報告書番号

V04026

タイトル（和文）

付着忌避物質を利用した防汚塗料の開発 --海洋浸漬試験による試作防汚塗料の評価--

タイトル（英文）

Development of antifouling paints using isocyano compounds as antifoulants-Evaluation of antifouling activity trial paints under field experiments-

概要 （図表や脚注は「報告書全文」に掲載しております）

これまでに開発した付着忌避物質の中から、強い活性を持ちさらに比較的安価に合成できると判断された化合物を大量合成して塗料化の検討を行うとともに、浸漬試験により防汚性能を調べた。その結果を踏まえ、新たに4種類の付着忌避物質を大量合成し、8種類の異なる組成の塗料を作成し、計32種類の試作塗料を作成した。試験塗料はお台場(東京都)と宮島(広島県)において約4ヶ月間の実海域浸漬試験により防汚性能を評価した。その結果、材料として用いた樹脂による防汚性能への影響が大きいものの、4ヵ月後でも対象として用いた市販防汚塗装に匹敵する防汚性能を示すものもあった。しかし、市販防汚剤と比較し他場合、植物や微生物皮膜に対する防汚性能が劣っており、フジツボに対する忌避物質単独での防汚塗料の開発は難しいと考えられた。

概要 （英文）

In previous studies on development of antifouling agents, we have produced some synthesized compounds which showed promising antifouling activity. In order to examine whether these promising compounds prevent the settlement of fouling organisms in the field, compounds No.35 and No.40 were incorporated in coatings and evaluated their antifouling activity in the four sites. Field experiments were carried out at Shizugawa in Miyagi, Odaiba in Tokyo, Toyohashi in Aichi, and Kakogawa in Hyogo for 2~3 months. In the field experiments, trial coatings did not show antifouling activity at Toyohashi and Kakogawa, whereas they showed promising performance as antifouling paint at Shizugawa and Odaiba. These results suggest that isocyano compounds, of which antifouling effects were not retained for so long, prevent settlement of barnacles, ascidians, and bryozoans.Since trial coatings showed antifouling effect for a few months, a large amount of 4 candidates (No.24, 35, 40, 80) was synthesized, incorporated into coatings, and tested their antifouling activity in the fields. A total of 32 test paints was made and placed at two field sites, Odaiba in Tokyo and Miyajima in Hiroshima for 4 months. In both field experiments, some test paints showed antifouling effect comparable to commercial antifouling paints. However, many test paints using isocyanides did not prevent settlement of sessile organisms; especially, their surfaces were easily covered with bacteria films, diatoms, and seaweeds. Therefore, in order to apply non-toxic isocyanides for antifouling coatings, it may be necessary to examine other application method, such as composition of hybrid polymer, concomitant use with other antifouling compounds, and incorporation of silicon resin.

報告者

キーワード