EP 3 800 003 A1 [Table 1] [Table 2] Rosin- modified  product 1 Rosin- modified  product 2 Rosin- modified  product 3 Rosin- modified  product 4 Rosin- modified  product 5 Rosin- modified  product 6 KE604 70 92 55 70 70 25 KR610 45 Adipic acid 10 3 15 10 Sebacic acid 10 Phenylsuccinic acid 10 Diethanolamine 20 5 30 20 Monoisopropanolamine 20 Monoethanolamine 20 Total 100 100 100 100 100 100 Example1 Example2 Example3 Example4 Example5 Example6 Example7 Rosin-modified  product 1 10 35 60 10 Rosin-modified  product 2 Rosin-modified  product 3 Rosin-modified  product 4 10 Rosin-modified  product 5 10 Rosin-modified  product 6 15 Sebacic acid 1 1 1 1 Adipic acid Diethanolamine KE-604 5 5 KE-311 5 Phosphonic acid  ester IPA 90 65 40 89 79 84 84 Preparation of flux [0051] Respective components were kneaded at compositions and formulations shown in Tables 2 to 5, and thereby each liquid flux was prepared. Examples 1 to 18 are shown in Tables 2 to 4. Comparative Examples 1 to 4 are shown in Table 5. Incidentally, in Tables 2 to 5, the unit of numerical values representing compositions is % by weight unless otherwise specified. The unit of the insulation resistance is  Ω , and the unit of the amount of current at during a water- drop test is  m A. 8