Aqueous tar solutions and tar-containning coating compositions

摘要

An aqueous tar solution having excellent stability in which tar is dissolved in a liquid and which does not cause precipitation or separation, as well as a tar-containing coating composition having highly rot- and termite-proofing effects, are provided. The aqueous tar solution is obtained by mixing 10 to 50 g of a 10-50% NaOH solution is mixed, relative to 100 g of tar, to produce a processed tar, and further mixing and dissolving 100 g of a 2-5% NaOH solution, relative to 10 to 20 g of the processed tar. The tar-containing coating composition is obtained by mixing the aqueous tar solution in an aqueous coating composition having resin as the major component and containing charcoal powder.