| 摘要 |
An aqueous soldering flux composition which is characterized in that it contains as component (A) (i) one or more hydrohalides or hydrophosphates of guanidine or a substituted guanidine, or (ii) one or more hydrohalides or 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, or mixtures of (i) and (ii) and as component (B) one or more hydrohalides or 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, said components (A) and (B) being present in the relative proportions of 25 to 100% by weight of (A) and 75 to 0% of (B). |
