Method of soldering with phosphoric acid soldering flux

Details Method of soldering with phosphoric acid soldering flux Method of soldering with phosphoric acid soldering flux

1976-06-25

1977-11-29

Rosenberg, Peter D.

Metal fusion bonding

Process

With pretreating other than heating or cooling of work part...

148 23, 148 24, 228223, B23K 100, B23K 3524

Patent

active

040601919

ABSTRACT:
A phosphoric acid flux with good fluxing efficiency and high viscosity, and one which is especially suitable for use in the soldering of copper and copper-plated stainless steel. The flux is in the form of a viscous fluid, or a thermally unstable emulsion when the fluid is combined with a pasty vehicle. The viscous fluid contains phosphoric acid and an organic material (molecular weight between 4,000 and 20,000) from the group consisting of polyethers and polyimines or mixtures thereof having an atomic ratio of carbon to ether oxygen plus imine nitrogen between 1.5 and 3.1.

REFERENCES:
patent: 2987817 (1961-06-01), Kozlik
patent: 3486948 (1969-12-01), Laubmeyer
patent: 3589952 (1971-06-01), Burne
patent: 3597285 (1971-08-01), Aronberg
patent: 3660127 (1972-05-01), Aronberg
patent: 3814638 (1974-06-01), Jordan
patent: 3865641 (1975-02-01), Aronberg

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