| 摘要 |
<p>Flux comprises besides the activator: (1) a thermoplastic resin with a softening point of 80 deg.C or above and/or above, and/or (2) an expoxy cpd. a radical-polymerisable ethylenically unsatd. cpd. or a blocked isocyanate cpd., or (3) a thermosetting resin comprising both a carboxylated resin and an epoxy resin and/or a theromosetting resin comprising both a carboxylated resin and an epoxy resin and/or a thermosetting resin contg. both carboxyl and epoxy gps.</p> |
