Flux flux for flux cored solder, flux for flux coat solder, flux flux solder, flux coat solder

摘要

An object of the present invention is to provide a flux cored solder or flux-coated solder in which flux and solder scattering during solder use are suppressed, and a flux contained therein. The polymer component contains 0.1 to 3% by mass of the polymer component based on the total mass of the rosin resin, the activator, and the flux, and the polymer component has a weight average molecular weight of 8000 to 100,000. Containing at least one selected from acrylic polymers and vinyl ether polymers. [Selection figure] None