ANTIFOULING COATING COMPOSITION, COPOLYMER FOR THE ANTIFOULING COATING COMPOSITION, AND COATED ARTICLE HAVING ANTIFOULING COATING FILM FORMED BY USING THE COMPOSITION ON SURFACE
PROBLEM TO BE SOLVED: To provide an antifouling coating composition excellent in long-term storage stability, and to provide a copolymer capable of maintaining stable coating film solubility and antifouling performance without causing coating film abnormalities such as cracks in seawater for a long period, and having a specific structure for forming an antifouling coating film having high environmental safety.SOLUTION: This invention relates to an antifouling coating composition containing a copolymer A acquired by copolymerizing 55-80 mass% t-butyldiphenylsilyl acrylate (a) with 20-45 mass% ethylenically unsaturated monomer (b) other than the monomer a.【課題】長期保存安定性に優れた防汚塗料組成物を提供し、かつ、海水中において長期間にわたりクラック等の塗膜異常を起こすことなく、安定した塗膜溶解性および防汚性能を維持できる、環境安全性の高い防汚塗膜を形成するための特定構造を有する共重合体を提供する。【解決手段】本発明によれば、アクリル酸ｔ－ブチルジフェニルシリル（ａ）５５～８０質量％と、前記単量体ａ以外のエチレン性不飽和単量体（ｂ）２０～４５質量％とを共重合して得られる共重合体Ａを含む防汚塗料組成物が提供される。【選択図】なし
