| 摘要 |
A soldering flux composition includes an aqueous solution containing as component (A) a compound selected from (i) hydrohalides and hydrophosphates of guanidine and substituted guanidines, (ii) hydrohalides and hydrophosphates of a five-membered nitrogen containing heterocyclic amine of the formula CxNyH3 in which x is 1 or 2 and y is 4 or 5, and mixtures of (i) and (ii) and as component (B) at least one compound selected from hydrohalides and hydrophosphates of aliphatic amines selected from aliphatic monoamines of formula CH3(CH2)nNR2 and aliphatic diamines of formula R2N(CH2)mNR2 in which n is 0 to 10, m is 5 to 10 and R is hydrogen, methyl, ethyl, propyl or butyl, the components (A) and (B) being present in the relative proportions of 25 to 100% by weight of (A) and 75 to 0% of (B).
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