FLUX GEL FOR ALUMINIUM SOLDERING AND METHOD FOR ITS PRODUCTION Russian patent published in 2017 - IPC B23K35/363 B23K103/10 

FIELD: metallurgy.

SUBSTANCE: flux in the form of gel contains salt components and a binder in the form of a 2-4% solution of polyisobutyl methacrylate in white spirit with the following components ratio, wt %: chloride magnesium 36-38, sodium chloride 7-8, aluminium fluoride 3-5, potassium fluoride 3-5, potassium chloride is the rest. The pre-mixed salt flux components are melted. After the resulting melt is cooled, the solid flux is ground in the binder to produce colloidal gel.

EFFECT: flux gel structure provides resistance to air humidification, convenient spot flux application and good solder spreadability.

2 cl, 1 ex