abstract |
The present invention relates to a sealing composition comprising: a polymer (A) having a cationic functional group and a weight average molecular weight of 2,000 to 1,000,000, and a benzotriazole compound, the content of the polymer (A) being relative to the sealing 100 parts by mass of the composition is 0.05 to 0.20 parts by mass, the content of the benzotriazole compound in the sealing composition is 3 to 200 ppm by mass, and the pH of the sealing composition is 3.0 to 6.5 . |