| abstract |
A basic gas capable of forming a detection coating film having good color developability and good color development durability, capable of easily forming a detection coating film having a practical service life (especially outdoors) without deterioration in color development performance over time. To provide acid gas detection paint. A basic gas or acid gas detection paint comprising a coating film-forming resin, a white inorganic pigment, a dispersant, and a colorant capable of changing color (coloring) by reacting with a basic gas (alkali gas) or an acid gas. . The dispersant is a carboxylic acid-introduced oligomer (unsaturated polyvalent carboxylic acid copolymer), and the color former is a sulfophthalein pH indicator or alizarin. [Selection figure] None |