| abstract |
Rust preventives (1) containing as the active ingredient a copolymer of a hydrophilic or water-soluble polymerizable monomer (A) and a monomer (B) having hydroxyphenylbenzotriazole structure and a polymerizable double bond; and rust preventives (2) containing as the active ingredients the monomer (A), the monomer (B), and a benzotriazole (D) represented by the general formula (1): (1) [wherein R1 is hydrogen, C1-8 alkyl, carboxyl, C1-8 alkoxycarbonyl, phenoxycarbonyl, hydroxyl, or halogeno; and R2 is hydrogen, hydroxyl, amino, halogeno, or a metal atom]. The monomer (B) includes compounds represented by the general formula (2). The rust preventives can be used in the form of aqueous solutions without using any organic solvent and are effective particularly in the rust prevention of copper and its alloys. |