Non-azeotropic solvent composition for cleaning and defluxing el

Details Non-azeotropic solvent composition for cleaning and defluxing el Non-azeotropic solvent composition for cleaning and defluxing el

1993-04-06

1995-03-07

Dean, Richard O.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

252164, 252170, 134 40, C23G 5024, C23G 5028, C11D 728

Patent

active

053955480

ABSTRACT:
A distillable, non-azeotropic solvent mixture for electronic assembly cleaning in order to adequately remove solder flux and other residues traditionally removed using CFC-based azeotropes. The mixture is heated to at least the boiling point of component A but less than the boiling point of component B. Component A vaporizes (102), forming a vapor layer above the mixture (103). Condensing elements (101) near the top of the cleaning apparatus condense the vapor (102), returning it to the heated mixture (103) to be vaporized again. The assembly (104) to be cleaned is lowered through the vapor and then immersed in the mixture (103) before being positioned in the vapor (102).

REFERENCES:
patent: 4276186 (1981-06-01), Bakos et al.
patent: 4640719 (1987-02-01), Hayes et al.
patent: 4666626 (1987-05-01), Francisco
patent: 4828751 (1989-05-01), Kremer
patent: 4867800 (1989-09-01), Dishart et al.
patent: 5013485 (1991-05-01), Tsukuda et al.

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