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Abstract

Provided are coating composition containing an organic polymer particle (A) composed of an organic polymer having a hydroxyl group and a cationic group in a molecule, the weight average particle size of which being 10 to 35 μm, and a base resin (B), wherein the content of the organic polymer particle (A) is 0.5 to 5.0% by weight in the solid content of the coating composition, and a method of producing the same, and a coating film and underwater structure using the coating composition. The base resin (B) has a group represented by the following general formula (1):

description='In-line Formulae' end='lead'—COO-M-OCO-A  (1)description='In-line Formulae' end='tail'

(wherein, M represents a divalent or higher valent metal, and A represents an organic acid residue of monobasic acid) or a group represented by the following general formula (2):

description='In-line Formulae' end='lead'—COO—Si(R¹R²R³)  (2)description='In-line Formulae' end='tail'

(wherein, R¹, R² and R³, which may be the same or different, represent an isopropyl group or an n-butyl group) in a side chain, or has a cross-linking structure represented by the following general formula (3):

description='In-line Formulae' end='lead'—COO-M-OCO—  (3)description='In-line Formulae' end='tail'

(wherein, M represents the same meaning as described above).

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First Claim