Flux and solder paste comprising said flux

Abstract

A flux, consisting of: (i) 30 to 80 wt. % of one or more acidic (meth)acrylic copolymers having an acid number in the range from 100 to 350 mg KOH/g and having a weight-average molecular weight Mw in the range from 1000 to 5000; (ii) 10 to 60 wt. % of at least one organic solvent; (iii) 0 to 15 wt. % of one or more amines; and, (iv) 0 to 20 wt. % of one or more components other than components (i) to (iii); and solder paste consisting of 80 to 92 wt. % of one or more different solders and 8 to 20 wt. % of the flux.

Dependencies are inferred from the claim text.